How to scroll to chip when clicked in horizontal scroll view?

How to scroll to chip when clicked in horizontal scroll view? - android

I have a HorizontalScrollView with a ChipGroup and some Chips. When I check a Chip which is cut out of the screen I want the ScrollView to snap to and show it fully.
This is how it looks like when I select it.
My layout file looks like this:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorWhite"
android:theme="#style/Theme.MaterialComponents">
<FrameLayout
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="165dp" />
<LinearLayout
android:id="#+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="45dp"
android:layout_marginTop="120dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<HorizontalScrollView
android:id="#+id/scroll_view"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.chip.ChipGroup
android:id="#+id/chip_group"
android:layout_width="wrap_content"
android:layout_height="match_parent"
app:chipSpacingHorizontal="10dp"
app:singleLine="true"
app:singleSelection="true"
app:selectionRequired="true">
<com.google.android.material.chip.Chip
android:id="#+id/chip_all"
android:layout_width="wrap_content"
android:layout_height="44dp"
android:layout_marginLeft="15dp"
android:backgroundTint="#color/indicator_chips"
android:checkable="true"
app:chipCornerRadius="10dp"
android:text="ALL"
android:textColor="#color/indicator_text"
app:checkedIconEnabled="false"
app:chipStrokeColor="#color/indicator_stroke"
app:chipStrokeWidth="1dp" />
<com.google.android.material.chip.Chip
android:id="#+id/chip_watching"
android:layout_width="wrap_content"
android:layout_height="44dp"
android:checkable="true"
android:text="WATCHING"
android:textColor="#color/indicator_text"
app:chipCornerRadius="10dp"
app:checkedIconEnabled="false"
android:backgroundTint="#color/indicator_chips"
app:chipStrokeColor="#color/indicator_stroke"
app:chipStrokeWidth="1dp" />
<com.google.android.material.chip.Chip
android:id="#+id/chip_completed"
android:layout_width="wrap_content"
android:layout_height="44dp"
android:checkable="true"
android:text="COMPLETED"
android:textColor="#color/indicator_text"
app:chipCornerRadius="10dp"
app:checkedIconEnabled="false"
android:backgroundTint="#color/indicator_chips"
app:chipStrokeColor="#color/indicator_stroke"
app:chipStrokeWidth="1dp" />
<com.google.android.material.chip.Chip
android:id="#+id/chip_onhold"
android:layout_width="wrap_content"
android:layout_height="44dp"
android:checkable="true"
android:text="ON HOLD"
android:textColor="#color/indicator_text"
app:chipCornerRadius="10dp"
app:checkedIconEnabled="false"
android:backgroundTint="#color/indicator_chips"
app:chipStrokeColor="#color/indicator_stroke"
app:chipStrokeWidth="1dp" />
<com.google.android.material.chip.Chip
android:id="#+id/chip_dropped"
android:layout_width="wrap_content"
android:layout_height="44dp"
android:checkable="true"
android:text="DROPPED"
android:textColor="#color/indicator_text"
app:chipCornerRadius="10dp"
app:checkedIconEnabled="false"
android:backgroundTint="#color/indicator_chips"
app:chipStrokeColor="#color/indicator_stroke"
app:chipStrokeWidth="1dp" />
<com.google.android.material.chip.Chip
android:id="#+id/chip_plantowatch"
android:layout_width="wrap_content"
android:layout_height="44dp"
android:layout_marginRight="15dp"
android:checkable="true"
android:text="PLAN TO WATCH"
android:textColor="#color/indicator_text"
app:chipCornerRadius="10dp"
app:checkedIconEnabled="false"
android:backgroundTint="#color/indicator_chips"
app:chipStrokeColor="#color/indicator_stroke"
app:chipStrokeWidth="1dp" />
</com.google.android.material.chip.ChipGroup>
</HorizontalScrollView>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
And my class file:
public class LibraryFragment extends Fragment {
private HorizontalScrollView scrollView;
Chip chip_dropped;
ChipGroup chipGroup;
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_library_anime, container, false);
return view;
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
scrollView = view.findViewById(R.id.scroll_view);
chipGroup = view.findViewById(R.id.chip_group);
chipGroup.setOnCheckedChangeListener(checkedListener);
}
ChipGroup.OnCheckedChangeListener checkedListener = new ChipGroup.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(ChipGroup group, int checkedId) {
FragmentTransaction fragmentTransaction = getActivity().getSupportFragmentManager().beginTransaction();
switch (group.getCheckedChipId()) {
case R.id.chip_all:
fragmentTransaction.replace(R.id.fragment_container, new ListALL()).commit();
break;
case R.id.chip_watching:
fragmentTransaction.replace(R.id.fragment_container, new ListWATCHING()).commit();
break;
case R.id.chip_completed:
fragmentTransaction.replace(R.id.fragment_container, new ListCOMPLETED()).commit();
break;
case R.id.chip_onhold:
fragmentTransaction.replace(R.id.fragment_container, new ListONHOLD()).commit();
break;
case R.id.chip_dropped:
fragmentTransaction.replace(R.id.fragment_container, new ListDROPPED()).commit();
break;
case R.id.chip_plantowatch:
fragmentTransaction.replace(R.id.fragment_container, new ListPLANTOWATCH()).commit();
break;
}
}
};
}
So to repeat, I'm trying to make my ScrollView scroll to a Chip when it is clicked, like the play store with its. I tried .scroolTo and .smoothScrollTo but non of it work.

I made a sample project for You. I think You can easily convert it to Your app.
MainActivity.java
public class MainActivity extends AppCompatActivity
{
HorizontalScrollView scroll;
int widthScreen;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
widthScreen = displayMetrics.widthPixels;
scroll = findViewById(R.id.scroll);
LinearLayout linearLayout = findViewById(R.id.linLay);
for (int index = 0; index <= linearLayout.getChildCount() - 1; index++)
{
linearLayout.getChildAt(index).setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
Rect r = new Rect();
v.getGlobalVisibleRect(r);
if (r.right == widthScreen)
{
Rect rr = new Rect();
v.getDrawingRect(rr);
scroll.smoothScrollBy(rr.right - (widthScreen - r.left), 0);
}
else if (r.left == 0)
{
Rect rr = new Rect();
v.getDrawingRect(rr);
scroll.smoothScrollBy(rr.right - (widthScreen - r.right), 0);
}
}
});
}
}
}
MainActivity.XML (just buttons in ScrollView)
<HorizontalScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<LinearLayout
android:id="#+id/linLay"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="2" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="3" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="4" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="5" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="6" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="7" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="8" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="9" />
</LinearLayout>
</HorizontalScrollView>
When You click on the button which is not fully on-screen ScrollView will be scrolled to a proper position to show full button.

Using the code that #iknow posted, I change it to work exactly like the play store with its Chips
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
chipGroup = view.findViewById(R.id.chip_group);
final Chip chip_all = view.findViewById(R.id.chip_all);
final Chip chip_watching = view.findViewById(R.id.chip_watching);
final Chip chip_completed = view.findViewById(R.id.chip_completed);
final Chip chip_onhold = view.findViewById(R.id.chip_onhold);
final Chip chip_dropped = view.findViewById(R.id.chip_dropped);
final Chip chip_plantowatch = view.findViewById(R.id.chip_plantowatch);
DisplayMetrics displayMetrics = new DisplayMetrics();
getActivity().getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
widthScreen = displayMetrics.widthPixels;
scrollView = view.findViewById(R.id.scroll_view);
chipGroup = view.findViewById(R.id.chip_group_anime);
for (int index = 0; index <= chipGroup.getChildCount() - 1; index++) {
chipGroup.getChildAt(index).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Rect r = new Rect();
view.getGlobalVisibleRect(r);
if(chip_all.isChecked()) {
Rect rr = new Rect();
view.getDrawingRect(rr);
scrollView.smoothScrollBy(rr.right - (widthScreen - r.right), 0);
}
if(chip_watching.isChecked()) {
Rect rr = new Rect();
view.getDrawingRect(rr);
scrollView.smoothScrollBy(rr.right - (widthScreen - r.right), 0);
}
if(chip_completed.isChecked()) {
scrollView.smoothScrollTo(chip_completed.getLeft() - (widthScreen / 2) + (chip_completed.getWidth() / 2), 0);
}
if(chip_onhold.isChecked()) {
scrollView.smoothScrollTo(chip_onhold.getLeft() - (widthScreen / 2) + (chip_onhold.getWidth() / 2), 0);
}
if(chip_dropped.isChecked()) {
Rect rr = new Rect();
view.getDrawingRect(rr);
scrollView.smoothScrollBy(r.right, 0);
}
if(chip_plantowatch.isChecked()) {
Rect rr = new Rect();
view.getDrawingRect(rr);
scrollView.smoothScrollBy(r.right, 0);
}
}
});
}
}
The end product looks like the gif above and again thank you to #iknow who provided the code!

Related

why does my app crashes when i try adding a radio button to the radio group?

i have a problem when trying to add a programmatically defined radio button to a radio group.
so i have a method that when is called inflates a dialog, this dialog contains within it a list of subjects displayed as a list of checkBox.
since i can't predefine how many subjects are needed in my radio group i decided to add them programmatically using the method mentioned earlier.
for some reason the app keep on crashing every time i open the dialog. with the break point being when the radio button gets added to the radio group.
here is a copy of the fragment responsible of calling the method (as well as the method called) :
public class addPaymentFragment extends Fragment {
private RadioGroup radioGroup;
private RadioButton radioButton;
private SchoolViewModel schoolViewModel;
private NumberPicker numberPicker;
private Button btn;
private Subject subject;
private Dialog dialog;
private RadioGroup radioGroup0;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View v = inflater.inflate(R.layout.fragment_add_payment, container, false);
btn = v.findViewById(R.id.btn_add_payment);
radioGroup0 = v.findViewById(R.id.rg_select_subject);
radioGroup = v.findViewById(R.id.rg_add_payment);
numberPicker = v.findViewById(R.id.numberPicker);
numberPicker.setMinValue(0);
numberPicker.setMaxValue(10);
schoolViewModel = new ViewModelProvider(this).get(SchoolViewModel.class);
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
schoolViewModel.getSingleTeacherWithSubjects(i).observe(getViewLifecycleOwner(), new Observer<TeacherWithSubjects>() {
#Override
public void onChanged(TeacherWithSubjects teacherWithSubjects) {
if (teacherWithSubjects.subjects.size() > 1) {
openDialog(teacherWithSubjects.subjects,radioGroup0);
} else {
subject = teacherWithSubjects.subjects.get(0);
}
}
});
}
});
schoolViewModel.getAllTeachers().observe(getViewLifecycleOwner(), new Observer<List<Teacher>>() {
#Override
public void onChanged(List<Teacher> teachers) {
addRadioButtons(teachers, radioGroup);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Toast.makeText(getContext(), teachers.get(0).getTeacherName() + "", Toast.LENGTH_SHORT).show();
}
});
}
});
return v;
}
private void addRadioButtons(List<Teacher> teachers, RadioGroup radioGroup) {
for (Teacher i : teachers) {
//instantiate...
RadioButton radioButton = new RadioButton(getContext());
//set the values that you would otherwise hardcode in the xml...
RadioGroup.LayoutParams params = new RadioGroup.LayoutParams(RadioGroup.LayoutParams.WRAP_CONTENT,
RadioGroup.LayoutParams.WRAP_CONTENT);
params.bottomMargin = 25;
params.leftMargin = 20;
params.rightMargin = 20;
params.topMargin = 20;
radioButton.setLayoutParams(params);
//label the button...
radioButton.setBackground(new ColorDrawable(Color.TRANSPARENT));
radioButton.setMinWidth(250);
radioButton.setBackgroundResource(R.drawable.custom_checkbox);
radioButton.setElevation(16);
radioButton.setGravity(Gravity.CENTER);
radioButton.setText(i.getTeacherName());
radioButton.setPadding(50, 100, 50, 100);
radioButton.setButtonDrawable(R.drawable.custom_checkbox);
radioButton.setId(i.getTeacherId());
//add it to the group.
radioGroup.addView(radioButton);
}
}
void openDialog(List<Subject> subjects,RadioGroup radioGroup) {
dialog = new Dialog(getContext());
radioGroup = dialog.findViewById(R.id.rg_select_subject);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.choose_teached_subject_dialog);
dialog.setCancelable(false);
Button confirmSubject = dialog.findViewById(R.id.btn_choose_subject);
Button cancelSubject = dialog.findViewById(R.id.btn_dont_choose_subject);
//populate the checkBox
for (int i = 0; i<subjects.size(); i++){
RadioButton radioButton1 = new RadioButton(dialog.getContext());
RadioGroup.LayoutParams params = new RadioGroup.LayoutParams(RadioGroup.LayoutParams.WRAP_CONTENT,
RadioGroup.LayoutParams.WRAP_CONTENT);
params.bottomMargin = 25;
params.leftMargin = 20;
params.rightMargin = 20;
params.topMargin = 20;
radioButton1.setLayoutParams(params);
radioButton1.setBackground(new ColorDrawable(Color.TRANSPARENT));
radioButton1.setMinWidth(250);
radioButton1.setBackgroundResource(R.drawable.custom_checkbox);
radioButton1.setElevation(16);
radioButton1.setGravity(Gravity.CENTER);
radioButton1.setId(i);
radioButton1.setText(subjects.get(i).getSubjectName());
radioButton1.setPadding(50, 100, 50, 100);
radioButton1.setButtonDrawable(R.drawable.custom_checkbox);
//add it to the group.
radioGroup.addView(radioButton1);
}
confirmSubject.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
dialog.dismiss();
Toast.makeText(getContext(), "Select a subject!", Toast.LENGTH_SHORT).show();
}
});
cancelSubject.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
dialog.dismiss();
}
});
dialog.getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
dialog.getWindow().getAttributes().windowAnimations = R.style.DialogAnimation;
dialog.getWindow().setGravity(Gravity.CENTER);
dialog.show();
}
}
and here is the code to the corresponding XML file :
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".addPaymentFragment">
<HorizontalScrollView
android:id="#+id/rv_add_payment"
android:layout_width="match_parent"
android:layout_height="146dp"
android:orientation="horizontal"
android:scrollbars="none"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<RadioGroup
android:id="#+id/rg_add_payment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"></RadioGroup>
</HorizontalScrollView>
<NumberPicker
android:id="#+id/numberPicker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:theme="#style/numberPickerTheme"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView" />
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Heures Enseignées :"
android:textColor="#000"
android:textSize="28sp"
app:fontFamily="#font/k2d_semibold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/rv_add_payment" />
<ImageView
android:id="#+id/imageView2"
android:layout_width="36dp"
android:layout_height="36dp"
android:layout_marginEnd="10dp"
android:src="#drawable/ic_baseline_play_arrow_24"
app:layout_constraintBottom_toBottomOf="#+id/numberPicker"
app:layout_constraintEnd_toStartOf="#+id/numberPicker"
app:layout_constraintTop_toTopOf="#+id/numberPicker" />
<LinearLayout
android:id="#+id/linearLayout"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="50dp"
android:gravity="center"
android:orientation="horizontal"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/numberPicker">
<TextView
android:id="#+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Total: "
android:textColor="#000"
android:textSize="28sp"
app:fontFamily="#font/k2d_semibold" />
<TextView
android:id="#+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0DA"
android:textColor="#000"
android:textSize="28sp"
app:fontFamily="#font/k2d_semibold" />
</LinearLayout>
<android.widget.Button
android:id="#+id/btn_add_payment"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_marginStart="20dp"
android:background="#drawable/rounded_button"
android:text="add"
android:textColor="#color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/linearLayout" />
<android.widget.Button
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_marginEnd="20dp"
android:background="#drawable/rounded_button"
android:text="cancel"
android:textColor="#color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#+id/linearLayout" />
</androidx.constraintlayout.widget.ConstraintLayout>
and here is a copy of the XML file of the dialog called :
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="20dp"
android:layout_marginTop="20dp"
android:layout_marginEnd="20dp"
android:layout_marginBottom="20dp"
android:background="#drawable/dialog_background"
android:elevation="16dp">
<TextView
android:id="#+id/choose_subject_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:fontFamily="#font/k2d_semibold"
android:text="choose teached subject :"
android:textColor="#color/black"
android:textSize="30dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<HorizontalScrollView
android:id="#+id/horizontalScrollView"
android:layout_width="match_parent"
android:layout_height="146dp"
android:orientation="horizontal"
android:scrollbars="none"
android:layout_marginTop="20dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/choose_subject_tv">
<RadioGroup
android:id="#+id/rg_select_subject"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"></RadioGroup>
</HorizontalScrollView>
<android.widget.Button
android:id="#+id/btn_choose_subject"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="50dp"
android:layout_marginTop="20dp"
android:layout_marginBottom="40dp"
android:background="#drawable/custom_button"
android:fontFamily="#font/k2d_semibold"
android:text="Confirm"
android:textAllCaps="false"
android:textColor="#color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/horizontalScrollView" />
<android.widget.Button
android:id="#+id/btn_dont_choose_subject"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="50dp"
android:layout_marginBottom="40dp"
android:layout_marginTop="20dp"
android:background="#drawable/custom_button"
android:fontFamily="#font/k2d_semibold"
android:text="Cancel"
android:textAllCaps="false"
android:textColor="#color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#+id/horizontalScrollView" />
</androidx.constraintlayout.widget.ConstraintLayout>
and here is the message shown in the logcat :
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.RadioGroup.addView(android.view.View)' on a null object reference
at com.example.ecolemathphysique.addPaymentFragment.openDialog(addPaymentFragment.java:142)
at com.example.ecolemathphysique.addPaymentFragment$1$1.onChanged(addPaymentFragment.java:62)
at com.example.ecolemathphysique.addPaymentFragment$1$1.onChanged(addPaymentFragment.java:58)
i apologize in advance if there is any mistakes in my question, am a bit new to asking questions here so please take it easy on me and thanks in advance

so i have managed to find the problem which was i called
radioGroup = dialog.findViewById(R.id.rg_select_subject);
before finishing setting up the dialog, which mean that the radioGroup object was never assigned.
here is how the related bloc looks like after fixing it :
void openDialog(List<Subject> subjects,RadioGroup radioGroup) {
dialog = new Dialog(getContext());
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.choose_teached_subject_dialog);
dialog.setCancelable(false);
radioGroup = dialog.findViewById(R.id.rg_select_subject);
Button confirmSubject = dialog.findViewById(R.id.btn_choose_subject);
Button cancelSubject = dialog.findViewById(R.id.btn_dont_choose_subject);

Sticky header in android project

I have a view in my android project like :
I want to show a header when I scroll down when the Title (lblHeaderJobTitle in the code below) reaches the top, and hide it back when the title is visible in the screen when I scroll up.
<androidx.coordinatorlayout.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/constraintLayoutHeader"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="invisible"
android:paddingStart="#dimen/margin4"
android:paddingEnd="#dimen/margin4"
android:layout_gravity="top"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<TextView
android:id="#+id/lblHeaderJobTitle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:fontFamily="#font/poppins_semibold"
android:textSize="#dimen/t4"
android:includeFontPadding="false"
android:textColor="#color/darkGrey"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:MvxBind="Text Title"/>
<TextView
android:id="#+id/lblHeaderJobCompanyName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="#dimen/margin2"
android:fontFamily="#font/mulish_bold"
android:textSize="#dimen/t2"
android:textColor="#color/darkGrey"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/lblHeaderJobTitle"
app:layout_constraintEnd_toStartOf="#id/verticalSeparatorHeader"
app:MvxBind="Text CompanyName"/>
<TextView
android:id="#+id/verticalSeparatorHeader"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="|"
android:fontFamily="#font/mulish_regular"
android:textSize="#dimen/t2"
android:textColor="#color/darkGrey"
app:layout_constraintTop_toTopOf="#id/lblHeaderJobCompanyName"
app:layout_constraintStart_toEndOf="#id/lblHeaderJobCompanyName"
app:layout_constraintEnd_toStartOf="#id/lblHeaderJobLocation"/>
<TextView
android:id="#+id/lblHeaderJobLocation"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:fontFamily="#font/mulish_regular"
android:textSize="#dimen/t2"
android:textColor="#color/darkGrey"
android:layout_marginLeft="#dimen/margin2"
app:layout_constraintTop_toTopOf="#id/lblHeaderJobCompanyName"
app:layout_constraintStart_toEndOf="#id/verticalSeparatorHeader"
app:MvxBind="Text LblLocation"/>
<View
android:id="#+id/imgHeaderSeparator"
android:layout_width="0dp"
android:layout_height="1dp"
android:background="#color/silver"
android:layout_marginTop="11dp"
app:layout_constraintTop_toBottomOf="#id/lblHeaderJobLocation"/>
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.core.widget.NestedScrollView
android:id="#+id/nestedScrollViewJobDetail"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fillViewport="true">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="#dimen/margin4"
android:paddingEnd="#dimen/margin4">
<ImageView
android:id="#+id/imgBrandingLogo"
android:layout_width="match_parent"
android:layout_height="100dp"
android:scaleType="centerInside"
android:background="#drawable/bg_roundrect_ripple_light_border"
app:MvxBind="DrawableName DefaultCompanyPhotoDrawable"/>
<TextView
android:id="#+id/lblJobTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/margin3"
android:layout_marginBottom="#dimen/margin2"
android:fontFamily="#font/poppins_semibold"
android:textSize="#dimen/t8"
android:includeFontPadding="false"
android:textColor="#color/darkGrey"
app:layout_constraintTop_toBottomOf="#id/relativeLayoutJobDetail"
app:MvxBind="Text Title"/>
<ImageView
android:id="#+id/imgJobLocation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/margin1"
android:src="#drawable/ic_location_on_black_24dp"
app:layout_constraintTop_toBottomOf="#id/lblJobTitle"/>
<TextView
android:id="#+id/lblJobCompanyName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/margin2"
android:layout_marginRight="#dimen/margin2"
android:fontFamily="#font/mulish_bold"
android:textSize="#dimen/t4"
android:textColor="#color/darkGrey"
app:layout_constraintStart_toEndOf="#id/imgJobLocation"
app:layout_constraintTop_toTopOf="#id/imgJobLocation"
app:layout_constraintEnd_toStartOf="#id/verticalSeparator"
app:MvxBind="Text CompanyName"/>
<TextView
android:id="#+id/verticalSeparator"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="|"
android:fontFamily="#font/mulish_regular"
android:textSize="#dimen/t4"
android:textColor="#color/darkGrey"
app:layout_constraintTop_toTopOf="#id/lblJobCompanyName"
app:layout_constraintStart_toEndOf="#id/lblJobCompanyName"
app:layout_constraintEnd_toStartOf="#id/lblJobLocation"/>
<TextView
android:id="#+id/lblJobLocation"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:fontFamily="#font/mulish_regular"
android:textSize="#dimen/t4"
android:textColor="#color/darkGrey"
android:layout_marginLeft="#dimen/margin2"
app:layout_constraintTop_toTopOf="#id/lblJobCompanyName"
app:layout_constraintStart_toEndOf="#id/verticalSeparator"
app:MvxBind="Text LblLocation"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/constraintLayoutBtnGroup"
android:layout_width="match_parent"
android:layout_height="63dp"
android:visibility="invisible"
android:paddingStart="#dimen/margin4"
android:paddingEnd="#dimen/margin4"
android:paddingBottom="#dimen/margin2"
android:layout_gravity="center_horizontal|bottom">
<Button
style="#style/Button.Tertiary"
android:id="#+id/btnSaveNow"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:paddingStart="24dp"
android:paddingEnd="24dp"
android:layout_marginLeft="#dimen/margin2"
android:fontFamily="#font/poppins_semibold"
app:icon="#drawable/ic_star_black_24dp"
app:layout_constraintTop_toTopOf="#id/frameLayoutApplyFix"
app:layout_constraintStart_toEndOf="#id/frameLayoutApplyFix"
app:layout_constraintBottom_toBottomOf="#id/frameLayoutApplyFix"
app:layout_constraintEnd_toEndOf="parent"
app:MvxBind="Text BtnSave; Click SaveCommand"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
In my activity I tried this:
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Create your application here
_constraintLayoutHeader = FindViewById<ConstraintLayout>(Resource.Id.constraintLayoutHeader);
_constraintLayoutBtnGroup = FindViewById<ConstraintLayout>(Resource.Id.constraintLayoutBtnGroup);
((CoordinatorLayout.LayoutParams)_constraintLayoutBtnGroup.LayoutParameters).Behavior = new StickyBottomBehavior(Resource.Id.frameLayoutApply, Resource.Id.nestedScrollViewJobDetail, EPosition.Bottom);
((CoordinatorLayout.LayoutParams)_constraintLayoutHeader.LayoutParameters).Behavior = new StickyBottomBehavior(Resource.Id.lblJobLocation, Resource.Id.nestedScrollViewJobDetail, EPosition.Top);
}
In my custom behavior:
public class StickyBottomBehavior : CoordinatorLayout.Behavior
{
#region Properties
private int _anchorId;
private int _scrollViewId;
private EPosition _position;
#endregion
#region Constructor
public StickyBottomBehavior(int anchorId, int scrollViewId, EPosition ePosition)
{
_anchorId = anchorId;
_scrollViewId = scrollViewId;
_position = ePosition;
}
#endregion
public override bool OnStartNestedScroll(CoordinatorLayout coordinatorLayout, Java.Lang.Object child, View directTargetChild, View target, int axes, int type)
{
return (axes == ((int)Vertical));
}
public override void OnNestedPreScroll(CoordinatorLayout coordinatorLayout, Java.Lang.Object child, View target, int dx, int dy, int[] consumed, int type)
{
var anchor = coordinatorLayout.FindViewById(_anchorId);
NestedScrollView scrollView = coordinatorLayout.FindViewById<NestedScrollView>(_scrollViewId);
CoordinatorLayout.LayoutParams layoutParams = (CoordinatorLayout.LayoutParams)scrollView.LayoutParameters;
int[] anchorLocation = new int[2];
View childView = child.JavaCast<View>();
anchor.GetLocationInWindow(anchorLocation);
switch (_position)
{
case EPosition.Top:
if (anchorLocation[1] < 0)
{
childView.Visibility = ViewStates.Visible;
layoutParams.TopMargin = childView.Height;
scrollView.LayoutParameters = layoutParams;
}
else
{
childView.Visibility = ViewStates.Invisible;
layoutParams.TopMargin = 0;
scrollView.LayoutParameters = layoutParams;
}
break;
case EPosition.Bottom:
if (anchorLocation[1] < 0)
{
childView.Visibility = ViewStates.Visible;
layoutParams.BottomMargin = childView.Height + 8;
scrollView.LayoutParameters = layoutParams;
}
else
{
childView.Visibility = ViewStates.Invisible;
layoutParams.BottomMargin = 0;
scrollView.LayoutParameters = layoutParams;
}
break;
default:
break;
}
}
}
public enum EPosition
{
Top,
Bottom
}
For the sticky buttons in the bottom it works very well but for the header there is smt wrong when I reach the Title in the top the screen is moving weirdly.
Demo: https://www.veed.io/view/6e1c9b71-b10d-46c7-a284-18b974a0bb7e
Is there another way to do that ? or there is smt wrong in my code ?
Thanks for the help.

Fragment is too slow when change on bottomnavigatioview?

My Fragment is taking so much time in update layout It is because of a lot of code in fragment how to resolve this please help me
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
</data>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/lyttabs"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_marginRight="20dp"
android:layout_marginLeft="20dp"
android:gravity="center"
android:layout_marginTop="20dp"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.bugfree.caviar.fonts.BabesNeueProBold
android:textStyle="bold"
android:layout_weight="1"
android:textColor="#color/black_text"
android:textSize="30dp"
android:layout_width="0dp"
android:text="My Events That I am..."
android:layout_height="wrap_content" />
<ImageView
android:id="#+id/btn_plus"
android:src="#drawable/plus"
android:layout_width="20dp"
android:layout_height="20dp" />
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.tabs.TabLayout
app:tabIndicatorColor="#color/button_red_back"
android:id="#+id/tabs"
android:layout_marginTop="15dp"
app:tabBackground="#drawable/tab_indicator_color"
app:tabTextAppearance="#style/MyCustomTextAppearance"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="fill"
app:tabMode="fixed" />
<androidx.viewpager.widget.ViewPager
android:layout_marginTop="30dp"
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</LinearLayout>
</LinearLayout>
<LinearLayout android:id="#+id/lytCreateEvent"
android:visibility="gone"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".activity.CreateEvent">
<ImageView
android:layout_marginEnd="15dp"
android:layout_marginStart="15dp"
android:layout_marginTop="30dp"
android:id="#+id/imgBack"
android:src="#drawable/back_black"
android:layout_width="20dp"
android:layout_height="20dp" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_marginEnd="15dp"
android:layout_marginStart="15dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp">
<com.bugfree.caviar.fonts.BabesNeueProBold
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Create event"
android:textColor="#color/black"
android:textSize="30dp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:orientation="vertical">
<com.bugfree.caviar.fonts.BabesNeueProBoldRegular
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Event title" />
<EditText
android:singleLine="true"
android:paddingStart="15dp"
android:layout_marginTop="10dp"
android:textColorHint="#color/black"
android:background="#drawable/edit_back"
android:id="#+id/edtEventTitle"
android:textSize="18dp"
android:layout_gravity="center"
android:hint="Beach Yoga!"
android:layout_width="match_parent"
android:layout_height="50dp" />
</LinearLayout>
<LinearLayout
android:layout_marginTop="10dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<com.bugfree.caviar.fonts.BabesNeueProBoldRegular
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Event type" />
</LinearLayout>
<RelativeLayout
android:layout_marginTop="10dp"
android:layout_gravity="center"
android:gravity="center"
android:background="#drawable/edit_back"
android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="horizontal">
<com.bugfree.caviar.fonts.BabesNeueProBoldRegular
android:layout_centerVertical="true"
android:paddingStart="15dp"
android:layout_width="wrap_content"
android:textColor="#color/black"
android:layout_height="wrap_content"
android:text="Business"
android:textSize="18dp" />
<ImageView
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:layout_marginEnd="15dp"
android:layout_width="12dp"
android:layout_height="12dp"
android:layout_alignParentEnd="true"
android:src="#drawable/down_arrow" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:orientation="horizontal">
<com.bugfree.caviar.fonts.BabesNeueProBoldRegular
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Event description" />
<com.bugfree.caviar.fonts.BabesNeueProBoldRegular
android:layout_marginEnd="15dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:text="94/300" />
</RelativeLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:background="#drawable/custombutton_border_edittext"
android:orientation="vertical">
<EditText
android:textSize="18dp"
android:id="#+id/edtDescription"
android:textColorHint="#color/black_text_new"
android:padding="10dp"
android:layout_gravity="start"
android:gravity="start"
android:hint="Beach yoga with Alissia is a lifestyle focused on health,
wellness, and self-care through the practice of"
android:layout_width="match_parent"
android:layout_height="150dp"
android:background="#android:color/transparent" />
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp">
<ImageView
android:layout_marginEnd="10dp"
android:layout_centerVertical="true"
android:tint="#color/black"
android:layout_alignParentEnd="true"
android:src="#drawable/down_arrowsmall"
android:layout_width="10dp"
android:layout_height="10dp" />
</RelativeLayout>
<EditText
android:paddingLeft="10dp"
android:layout_gravity="start"
android:gravity="start"
android:id="#+id/edtSplReq"
android:layout_width="match_parent"
android:layout_marginTop="15dp"
android:layout_height="100dp"
android:singleLine="true"
android:padding="10dp"
android:background="#drawable/lay_without_border"
android:hint="Add a special request[optional]"
android:textColorHint="#848484"
android:textSize="18dp" />
<Button
android:outlineProvider="bounds"
android:stateListAnimator="#null"
style="?android:attr/borderlessButtonStyle"
android:layout_marginBottom="35dp"
android:id="#+id/btnSubmit"
android:layout_marginTop="30dp"
android:textSize="18dp"
android:textAllCaps="false"
android:text="Submit"
android:textColor="#color/space_white"
android:background="#drawable/custombutton"
android:layout_width="match_parent"
android:layout_height="35dp" />
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="#+id/lytTab"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.tabs.TabLayout
app:tabBackground="#drawable/tab_indicator_color"
app:tabIndicatorColor="#color/button_red_back"
android:id="#+id/tabsLOc"
android:layout_marginTop="10dp"
app:tabTextAppearance="#style/MyCustomTextAppearanceSmall"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="fill"
app:tabMode="fixed" />
<androidx.viewpager.widget.ViewPager
android:id="#+id/viewPagerLoc"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</LinearLayout>
and here is my fragment
public class EventFragment extends Fragment {
private View view;
ViewPagerAdapter viewPagerAdapter;
LocationPagerAdapter locationPagerAdapter;
private String current = "";
private String ddmmyyyy = "MMDDYYYY";
private Calendar cal = Calendar.getInstance();
FragmentEventBinding binding;
private OnFragmentInteractionListener mListener;
public EventFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
binding = DataBindingUtil.inflate(
inflater, R.layout.fragment_event, container, false);
Typeface font = Typeface.createFromAsset(getActivity().getAssets(), "fonts/Bebas Neue Pro Regular.otf");
binding.lytTopImg.setOnClickListener(v -> {
binding.lytLocDetails.setVisibility(View.VISIBLE);
binding.lytPartLocNew.setVisibility(View.GONE);
});
binding.imgTopEvent.setImageBitmap(SetBrightness(BitmapFactory.decodeResource(getResources(), R.drawable.dummy),-70));
binding.imgBackLocDetail.setOnClickListener(v -> {
binding.lytLocDetails.setVisibility(View.GONE);
binding.lytPartLocNew.setVisibility(View.VISIBLE);
/* Intent intent = new Intent(PartnerLocationActivity.this, LoactionDetails.class);
startActivity(intent);*/
});
binding.btnPlus.setOnClickListener(v -> {
binding.lyttabs.setVisibility(View.GONE);
binding.lytCreateEvent.setVisibility(View.VISIBLE);
});
binding.imgBack.setOnClickListener(v -> {
mListener.changeFragment(2);
binding.lyttabs.setVisibility(View.VISIBLE);
binding.lytCreateEvent.setVisibility(View.GONE);
});
binding.buttonCreateEvent.setOnClickListener(v -> {
binding.lyttabs.setVisibility(View.VISIBLE);
binding.lytCreateEvent.setVisibility(View.GONE);
});
binding.imgBackPartnerLoc.setOnClickListener(v -> {
binding.lytPartLocNew.setVisibility(View.GONE);
binding.lytCreateEvent.setVisibility(View.VISIBLE);
/* Intent intent = new Intent(getActivity(), CreateEvent.class);
startActivity(intent);*/
});
binding.lytTopPartLoc.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
binding.lytLocDetails.setVisibility(View.VISIBLE);
binding.lytPartLocNew.setVisibility(View.GONE);
}
});
binding.buttonCreateEvent.setTypeface(font);
binding.edtEventTitle.setTypeface(font);
binding.edtDescription.setTypeface(font);
binding.edtNameLoc.setTypeface(font);
binding.edtAddressLoc.setTypeface(font);
binding.rdbOne.setTypeface(font);
binding.rdbGroup.setTypeface(font);
binding.buttonPartnerloc.setOnClickListener(v -> {
binding.lytPartLocNew.setVisibility(View.VISIBLE);
binding.lytCreateEvent.setVisibility(View.GONE);
/* Intent intent = new Intent(CreateEvent.this, PartnerLocationActivity.class);
startActivity(intent);*/
});
binding.buttonCreateEvent.setOnClickListener(v -> {
binding.lyttabs.setVisibility(View.VISIBLE);
binding.lytCreateEvent.setVisibility(View.GONE);
});
binding.edtDob.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (!s.toString().equals(current)) {
String clean = s.toString().replaceAll("[^\\d.]|\\.", "");
String cleanC = current.replaceAll("[^\\d.]|\\.", "");
int cl = clean.length();
int sel = cl;
for (int i = 2; i <= cl && i < 6; i += 2) {
sel++;
}
if (clean.equals(cleanC)) sel--;
if (clean.length() < 8) {
clean = clean + ddmmyyyy.substring(clean.length());
} else {
int day = Integer.parseInt(clean.substring(0, 2));
int mon = Integer.parseInt(clean.substring(2, 4));
int year = Integer.parseInt(clean.substring(4, 8));
mon = mon < 1 ? 1 : mon > 12 ? 12 : mon;
cal.set(Calendar.MONTH, mon - 1);
year = (year < 1900) ? 1900 : (year > 2100) ? 2100 : year;
cal.set(Calendar.YEAR, year);
day = (day > cal.getActualMaximum(Calendar.DATE)) ? cal.getActualMaximum(Calendar.DATE) : day;
clean = String.format("%02d%02d%02d", day, mon, year);
}
clean = String.format("%s/%s/%s", clean.substring(0, 2),
clean.substring(2, 4),
clean.substring(4, 8));
sel = sel < 0 ? 0 : sel;
current = clean;
binding.edtDob.setText(current);
binding.edtDob.setSelection(sel < current.length() ? sel : current.length());
}
}
#Override
public void afterTextChanged(Editable s) {
}
});
new Thread(new Runnable() {
#Override
public void run() {
try {
}catch (Exception ignored){
}
}
}).start();
viewPagerAdapter = new ViewPagerAdapter(getChildFragmentManager());
binding.viewPager.setAdapter(viewPagerAdapter);
binding.tabs.setupWithViewPager( binding.viewPager);
/*binding.imgBack.setOnClickListener(v -> {
binding.lytLocDetails.setVisibility(View.GONE);
binding.lytPartLocNew.setVisibility(View.VISIBLE);
});*/
locationPagerAdapter = new LocationPagerAdapter(getFragmentManager());
binding.viewPagerLoc.setAdapter(locationPagerAdapter);
binding.tabsLOc.setupWithViewPager(binding.viewPagerLoc);
binding.edtSplReq.setTypeface(font);
binding.edtEmail.setTypeface(font);
binding.edtPhone.setTypeface(font);
binding.edtLastName.setTypeface(font);
binding.edtFirstname.setTypeface(font);
binding.btnSubmit.setTypeface(font);
binding.btnFindTable.setTypeface(font);
binding.btnFindTable.setOnClickListener(v -> {
binding.lytBtnFind.setVisibility(View.GONE);
binding.lytTab.setVisibility(View.GONE);
binding.lytBookTable.setVisibility(View.VISIBLE);
});
binding.btnSubmit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
binding.lyttabs.setVisibility(View.VISIBLE);
binding.lytLocDetails.setVisibility(View.GONE);
binding.lytPartLocNew.setVisibility(View.GONE);
binding.lytCreateEvent.setVisibility(View.GONE);
binding.lytBookTable.setVisibility(View.GONE);
binding.lytBtnFind.setVisibility(View.VISIBLE);
binding.lytTab.setVisibility(View.VISIBLE);
binding.viewPager.setCurrentItem(1);
binding.tabs.getSelectedTabPosition();
}
});
return view = binding.getRoot();
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mListener = (OnFragmentInteractionListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnFragmentInteractionListener");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public Bitmap SetBrightness(Bitmap src, int value) {
// original image size
int width = src.getWidth();
int height = src.getHeight();
// create output bitmap
Bitmap bmOut = Bitmap.createBitmap(width, height, src.getConfig());
// color information
int A, R, G, B;
int pixel;
// scan through all pixels
for(int x = 0; x < width; ++x) {
for(int y = 0; y < height; ++y) {
// get pixel color
pixel = src.getPixel(x, y);
A = Color.alpha(pixel);
R = Color.red(pixel);
G = Color.green(pixel);
B = Color.blue(pixel);
// increase/decrease each channel
R += value;
if(R > 255) { R = 255; }
else if(R < 0) { R = 0; }
G += value;
if(G > 255) { G = 255; }
else if(G < 0) { G = 0; }
B += value;
if(B > 255) { B = 255; }
else if(B < 0) { B = 0; }
bmOut.setPixel(x, y, Color.argb(A, R, G, B));
}
}
// return final image
return bmOut;
}
}

There are two parts to this answer.
As per https://developer.android.com/topic/performance/rendering/optimizing-view-hierarchies
Android Layouts allow you to nest UI objects in the view hierarchy. This nesting can also impose a layout cost.
Your layout has multiple levels of nesting, this can have a large cost to layout.
Simplifying you layout with a more flexible layout like a ConstraintLayout Might reduce the layout cost.
Sometimes you are just trying to do too much when creating a view, do some of the work in a background thread and update the view when done (optionally putting up a busy type of progress bar while doing it)
Some idea's based on your code shown.
Instead of scanning every pixel of an image with the SetBrightness method which could take some time depending on the size of the image.
Add the image to the layout without the Brightness adjusted, start background task adjust image Brightness and when done replace the original un-adjusted image with the adjusted image.
This could probably be done without a busy progress bar.
Delay the creation of the offscreen viewpager pages until they are really needed.
Instead of each Fragment in the viewpager creating it's view in onCreateView when the Viewpager is created, create a placeholder view in the Fragment's onCreateView and update it in the Fragment's onResume which is only called when the Fragment is shown on screen (note need a recent'ish version of Viewpager for this behaviour)

Recyclerview horizontal with a bottom line indicator

I have a horizontal recycleview which can scroll & snap center. Then I want a bottom line indicator to indicate selected item when click on it. It looks like this:
I had a look at this library but it doesn't fit my requirements.
Is there idea to implement this one?
Update: I need to keep the indicator is always visible and has a smooth scroll when moving to another position like above gift

You can try the following code:
DateTabIndicator.java
public class DateTabIndicator extends FrameLayout implements View.OnClickListener {
private List<Integer> days = new ArrayList<>();
private int selectedPageIndex = 0;
private int selectedDayIndex = 0;
private static final int[] DAY_TV_RES_ID = {R.id.day_mon, R.id.day_tue, R.id.day_wed, R.id.day_thu, R.id.day_fri, R.id.day_sat,
R.id.day_sun};
public DateTabIndicator(#NonNull Context context) {
super(context);
init();
}
public DateTabIndicator(#NonNull Context context, #Nullable AttributeSet attrs) {
super(context, attrs);
init();
}
public DateTabIndicator(#NonNull Context context, #Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
private TextView monFixedIndicator;
private TextView tueFixedIndicator;
private TextView wedFixedIndicator;
private TextView thuFixedIndicator;
private TextView friFixedIndicator;
private TextView satFixedIndicator;
private TextView sunFixedIndicator;
private View lineIndicator;
private ViewPager daysPager;
private DaysPagerAdapter daysPagerAdapter;
private Handler mHandler = new Handler();
private void init() {
addView(LayoutInflater.from(getContext()).inflate(R.layout.date_tab_indicator, this, false));
monFixedIndicator = findViewById(R.id.mon_fixed_indicator);
tueFixedIndicator = findViewById(R.id.tue_fixed_indicator);
wedFixedIndicator = findViewById(R.id.wed_fixed_indicator);
thuFixedIndicator = findViewById(R.id.thu_fixed_indicator);
friFixedIndicator = findViewById(R.id.fri_fixed_indicator);
satFixedIndicator = findViewById(R.id.sat_fixed_indicator);
sunFixedIndicator = findViewById(R.id.sun_fixed_indicator);
lineIndicator = findViewById(R.id.line_indicator);
daysPager = findViewById(R.id.days_pager);
daysPagerAdapter = new DaysPagerAdapter();
daysPager.setAdapter(daysPagerAdapter);
daysPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
selectedPageIndex = position;
mHandler.removeCallbacks(selectDayRunnable);
mHandler.postDelayed(selectDayRunnable,500);
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
mHandler.postDelayed(selectDayRunnable,500);
}
class DaysPagerAdapter extends PagerAdapter {
#Override
public int getCount() {
return (int) Math.ceil(days.size() / 7f);
}
#NonNull
#Override
public Object instantiateItem(#NonNull ViewGroup container, final int position) {
final View view = LayoutInflater.from(getContext()).inflate(R.layout.days_pager_item, container, false);
TextView dayMonTv = view.findViewById(R.id.day_mon);
TextView dayTueTv = view.findViewById(R.id.day_tue);
TextView dayWedTv = view.findViewById(R.id.day_wed);
TextView dayThuTv = view.findViewById(R.id.day_thu);
TextView dayFriTv = view.findViewById(R.id.day_fri);
TextView daySatTv = view.findViewById(R.id.day_sat);
TextView daySunTv = view.findViewById(R.id.day_sun);
//Setting Day Text
int index = position * 7;
dayMonTv.setText(days.size() > index ? String.valueOf(days.get(index)) : "");
dayTueTv.setText(days.size() > (++index) ? String.valueOf(days.get(index)) : "");
dayWedTv.setText(days.size() > (++index) ? String.valueOf(days.get(index)) : "");
dayThuTv.setText(days.size() > (++index) ? String.valueOf(days.get(index)) : "");
dayFriTv.setText(days.size() > (++index) ? String.valueOf(days.get(index)) : "");
daySatTv.setText(days.size() > (++index) ? String.valueOf(days.get(index)) : "");
daySunTv.setText(days.size() > (++index) ? String.valueOf(days.get(index)) : "");
//Setting Day VISIBILITY
index = position * 7;
dayMonTv.setVisibility(days.size() > index && days.get(index) != 0 ? VISIBLE : INVISIBLE);
dayTueTv.setVisibility(days.size() > ++index && days.get(index) != 0 ? VISIBLE : INVISIBLE);
dayWedTv.setVisibility(days.size() > ++index && days.get(index) != 0 ? VISIBLE : INVISIBLE);
dayThuTv.setVisibility(days.size() > ++index && days.get(index) != 0 ? VISIBLE : INVISIBLE);
dayFriTv.setVisibility(days.size() > ++index && days.get(index) != 0 ? VISIBLE : INVISIBLE);
daySatTv.setVisibility(days.size() > ++index && days.get(index) != 0 ? VISIBLE : INVISIBLE);
daySunTv.setVisibility(days.size() > ++index && days.get(index) != 0 ? VISIBLE : INVISIBLE);
//Setting Selection
dayMonTv.setSelected(false);
dayTueTv.setSelected(false);
dayWedTv.setSelected(false);
dayThuTv.setSelected(false);
dayFriTv.setSelected(false);
daySatTv.setSelected(false);
daySunTv.setSelected(false);
//Setting Click Listener
dayMonTv.setOnClickListener(DateTabIndicator.this);
dayTueTv.setOnClickListener(DateTabIndicator.this);
dayWedTv.setOnClickListener(DateTabIndicator.this);
dayThuTv.setOnClickListener(DateTabIndicator.this);
dayFriTv.setOnClickListener(DateTabIndicator.this);
daySatTv.setOnClickListener(DateTabIndicator.this);
daySunTv.setOnClickListener(DateTabIndicator.this);
view.setTag(position);
container.addView(view);
return view;
}
#Override
public void destroyItem(#NonNull ViewGroup container, int position, #NonNull Object object) {
container.removeView((View) object);
}
#Override
public boolean isViewFromObject(#NonNull View view, #NonNull Object object) {
return view == object;
}
}
public List<Integer> getDays() {
return days;
}
public void setDays(List<Integer> days) {
this.days = days;
daysPagerAdapter.notifyDataSetChanged();
}
private View prevDayTv = null;
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.day_mon:
selectDay(v, 0);
break;
case R.id.day_tue:
selectDay(v, 1);
break;
case R.id.day_wed:
selectDay(v, 2);
break;
case R.id.day_thu:
selectDay(v, 3);
break;
case R.id.day_fri:
selectDay(v, 4);
break;
case R.id.day_sat:
selectDay(v, 5);
break;
case R.id.day_sun:
selectDay(v, 6);
break;
}
}
/**
* #param dayIndex 0-6
*/
private void selectDay(View v, int dayIndex) {
selectedDayIndex = dayIndex;
int dayListIndex = selectedPageIndex * 7 + dayIndex;
if (prevDayTv != null) prevDayTv.setSelected(false);
v.setSelected(true);
prevDayTv = v;
int[] location = new int[2];
v.getLocationOnScreen(location);
int center_point = location[0]%getWidth() + v.getWidth() / 2;
lineIndicator.animate().x(center_point - lineIndicator.getWidth() / 2);
if (days.size() > dayListIndex && days.get(dayListIndex)!=0) {
//listener
} else {
for (int i = 0; i < 7; i++) {
dayListIndex = selectedPageIndex * 7 + i;
if (days.get(dayListIndex)==1 || days.size()-1 == dayListIndex) {
setSelectedDay(i);
break;
}
}
}
}
/**
* #param dayIndex 0-6
*/
public void setSelectedDay(int dayIndex) {
if (dayIndex >= 0 && dayIndex < 7) {
selectedDayIndex = dayIndex;
View view = daysPager.findViewWithTag(selectedPageIndex);
selectDay(view.findViewById(DAY_TV_RES_ID[dayIndex]),dayIndex);
}
}
private Runnable selectDayRunnable = new Runnable() {
#Override
public void run() {
setSelectedDay(selectedDayIndex);
}
};
}
date_tab_indicator.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:id="#+id/mon_to_sun_lay"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="#+id/mon_fixed_indicator"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textSize="10sp"
android:layout_weight="1"
android:gravity="center"
android:text="M" />
<TextView
android:id="#+id/tue_fixed_indicator"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textSize="10sp"
android:layout_weight="1"
android:gravity="center"
android:text="T" />
<TextView
android:id="#+id/wed_fixed_indicator"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textSize="10sp"
android:layout_weight="1"
android:gravity="center"
android:text="W" />
<TextView
android:id="#+id/thu_fixed_indicator"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="10sp"
android:layout_weight="1"
android:gravity="center"
android:text="T" />
<TextView
android:id="#+id/fri_fixed_indicator"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textSize="10sp"
android:layout_weight="1"
android:gravity="center"
android:text="F" />
<TextView
android:id="#+id/sat_fixed_indicator"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textSize="10sp"
android:layout_weight="1"
android:gravity="center"
android:text="S" />
<TextView
android:id="#+id/sun_fixed_indicator"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textSize="10sp"
android:layout_weight="1"
android:gravity="center"
android:text="S" />
</LinearLayout>
<android.support.v4.view.ViewPager
android:id="#+id/days_pager"
android:layout_width="match_parent"
android:layout_height="50dp" />
<View
android:id="#+id/line_indicator"
android:layout_width="15dp"
android:layout_height="3dp"
android:padding="5dp"
android:background="#000000"
/>
</LinearLayout>
days_pager_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="horizontal">
<FrameLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:id="#+id/day_mon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/day_circle_bg"
android:gravity="center"
android:layout_gravity="center"
android:textColor="#color/day_color_selector" />
</FrameLayout>
<FrameLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:id="#+id/day_tue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/day_circle_bg"
android:gravity="center"
android:layout_gravity="center"
android:textColor="#color/day_color_selector" />
</FrameLayout>
<FrameLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:id="#+id/day_wed"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/day_circle_bg"
android:gravity="center"
android:layout_gravity="center"
android:textColor="#color/day_color_selector" />
</FrameLayout>
<FrameLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:id="#+id/day_thu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/day_circle_bg"
android:gravity="center"
android:layout_gravity="center"
android:textColor="#color/day_color_selector" />
</FrameLayout>
<FrameLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:id="#+id/day_fri"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/day_circle_bg"
android:gravity="center"
android:layout_gravity="center"
android:textColor="#color/day_color_selector" />
</FrameLayout>
<FrameLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:id="#+id/day_sat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/day_circle_bg"
android:gravity="center"
android:layout_gravity="center"
android:textColor="#color/day_color_selector" />
</FrameLayout>
<FrameLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:id="#+id/day_sun"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/day_circle_bg"
android:gravity="center"
android:layout_gravity="center"
android:textColor="#color/day_color_selector" />
</FrameLayout>
</LinearLayout>
days_color_selector.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_selected="true" android:color="#000000"></item>
<item android:state_selected="false" android:color="#bdbebd"></item>
</selector>
days_circle_bg.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<size
android:width="40dp"
android:height="40dp" />
<stroke android:width="1dp"
android:color="#bdbebd"
/>
</shape>
MainActivity.java
public class MainActivity extends AppCompatActivity {
private DateTabIndicator dateTabIndicator;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
dateTabIndicator = findViewById(R.id.date_tab_indicator);
dateTabIndicator.setDays(Arrays.asList(new Integer[]{0,0,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31}));
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<com.karacken.datetabindicator.DateTabIndicator
android:id="#+id/date_tab_indicator"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
/>
</RelativeLayout>
Output:

How to build a Horizontal ListView with RecyclerView?
check the answer of "Suragch" and plus addition to that answer
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="match_parent">
//use your entire xml code here plus place a image view as
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below = "id of the date circle"
android:background = "add a line of length according to your requirement in drawables and assign here"
android:visibility="set to invisible"/>
/RelativeLayout>
then inside of onClick() method inside ViewHolder class set the visibilty of the ImageView to visible by Calling imageView.setVisibility(View.VISIBLE) and callnotifyDataSetChanged()
Hope it is helping...

You can change indicator position by trigger the RecycleView item selected change. For item selected change, you can use a variable to keep the selected position in adapter. When user fling the RecycleView, use have calculate selected position based on position of indicator.

Android Add view to linearlayout in relativeLayout on button click

help me solve my problem. There is a main layout RelativeLayout it is Linearlayout where I want to programmatically add view. Here is my code.
public class GenBarCodeActivity extends Activity {
BarCodeView Barview = null;
LinearLayout.LayoutParams layoutParams;
LinearLayout ll;
RelativeLayout rl;
Button getBarCode;
private static final int ID = 34646456;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_barcode);
getBarCode = (Button)findViewById(R.id.btnGetBarCode);
getBarCode.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
ll = (LinearLayout)findViewById(R.id.linearCodeView);
EANTEXT = edBarText.getText().toString();
ImageView old = (ImageView) ll.findViewById(ID);
if (old != null) {
((LinearLayout) old.getParent()).removeViewInLayout(old);
}
layoutParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
ll.addView(Barview, layoutParams);
rl.invalidate();
}
});
fillLinear();
setBarCode();
}
private void fillLinear(){
rl = (RelativeLayout)findViewById(R.id.layout_barcode);
ll = (LinearLayout)findViewById(R.id.linearCodeView);
layoutParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
ImageView imBar = new ImageView(this);
Bitmap imbitmap = BitmapFactory.decodeResource(getResources(), R.drawable.barcode);
imBar.setLayoutParams(layoutParams);
imBar.setImageBitmap(imbitmap);
imBar.setId(ID);
ll.setBackgroundColor(Color.TRANSPARENT);
ll.addView(imBar);
}
private void setBarCode(){
Barview = new BarCodeView(GenBarCodeActivity.this);
Barview.setBarCodeNum(0);
}
}
This is my View
public class BarCodeView extends View {
private static int numcode = 0;
private static String codedata = null;
public BarCodeView(Context context) {
super(context);
}
public void setBarCodeText(String text){
this.codedata = text;
}
public String getBarCodeText(){
return this.codedata;
}
public void setBarCodeNum(int num){
this.numcode = num;
}
public int getBarCodeNum(){
return this.numcode;
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
switch (numcode) {
// ean 13
case 0:
try{
showEAN13(canvas);
} catch (Exception e) {
e.printStackTrace();
}
break;
}
}
private static void showEAN13(Canvas canvas) throws Exception {
EAN13 barcode = new EAN13();
/*
EAN 13 Valid data char set:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9 (Digits)
EAN 13 Valid data length: 12 digits only, excluding the last checksum digit
*/
barcode.setData(codedata);
// for EAN13 with supplement data (2 or 5 digits)
/*
barcode.setSupData("12");
// supplement bar height vs bar height ratio
barcode.setSupHeight(0.8f);
// space between barcode and supplement barcode (in pixel)
barcode.setSupSpace(15);
*/
// Unit of Measure, pixel, cm, or inch
barcode.setUom(IBarcode.UOM_PIXEL);
// barcode bar module width (X) in pixel
barcode.setX(2f);
// barcode bar module height (Y) in pixel
barcode.setY(90f);
// barcode image margins
barcode.setLeftMargin(10f);
barcode.setRightMargin(10f);
barcode.setTopMargin(10f);
barcode.setBottomMargin(10f);
// barcode image resolution in dpi
barcode.setResolution(72);
// disply barcode encoding data below the barcode
barcode.setShowText(true);
// barcode encoding data font style
barcode.setTextFont(new AndroidFont("Arial", Typeface.NORMAL, 10));
// space between barcode and barcode encoding data
barcode.setTextMargin(6);
barcode.setTextColor(AndroidColor.black);
// barcode bar color and background color in Android device
barcode.setForeColor(AndroidColor.black);
barcode.setBackColor(AndroidColor.white);
/*
specify your barcode drawing area
*/
RectF bounds = new RectF(120, 120, 0, 0);
barcode.drawBarcode(canvas, bounds);
}
}
here is my xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/layout_barcode"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#f0e0a2"
android:orientation="vertical" >
<ImageView
android:id="#+id/closeBarCode"
android:layout_width="30dip"
android:layout_height="30dip"
android:layout_alignParentRight="true"
android:layout_alignTop="#+id/txtInfo"
android:layout_marginRight="3dp"
android:src="#drawable/delete" />
<TextView
android:id="#+id/txtInfo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginLeft="3dp"
android:layout_marginTop="3dp"
android:text="#string/barcode_title"
android:textColor="#000"
android:textSize="20dip" />
<LinearLayout
android:id="#+id/linearLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/closeBarCode" >
<TextView
android:id="#+id/txtEAN"
android:layout_width="160dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="#string/barcode_ean"
android:textColor="#000"
android:textSize="20dip" />
<Spinner
android:id="#+id/spEAN"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:id="#+id/linearLayout2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/txtInfo"
android:layout_below="#+id/linearLayout1" >
<TextView
android:id="#+id/txtCodeColor"
android:layout_width="160dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="#string/barcode_color"
android:textColor="#000"
android:textSize="20dip" />
<Spinner
android:id="#+id/spCodeColor"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:id="#+id/linearLayout3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/linearLayout2"
android:layout_below="#+id/linearLayout2" >
<TextView
android:id="#+id/txtCodeBackColor"
android:layout_width="160dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="#string/barcode_back_color"
android:textColor="#000"
android:textSize="20dip" />
<Spinner
android:id="#+id/spCodeBackColor"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:id="#+id/linearLayout4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/linearLayout3" >
<TextView
android:id="#+id/txtCodePosition"
android:layout_width="160dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="#string/barcode_position"
android:textColor="#000"
android:textSize="20dip" />
<Spinner
android:id="#+id/spCodePosition"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:id="#+id/linearCodeView"
android:layout_width="300dip"
android:layout_height="200dip"
android:layout_below="#+id/edBarCode"
android:layout_marginRight="45dp"
android:layout_marginTop="25dip"
android:layout_toLeftOf="#+id/closeBarCode"
android:orientation="vertical" >
</LinearLayout>
<Button
android:id="#+id/btnSetBarCode"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/btnGetBarCode"
android:layout_alignBottom="#+id/btnGetBarCode"
android:layout_toLeftOf="#+id/closeBarCode"
android:text="#string/set_code" />
<Button
android:id="#+id/btnGetBarCode"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="31dp"
android:text="#string/get_code" />
<EditText
android:id="#+id/edBarCode"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/linearCodeView"
android:layout_alignRight="#+id/linearCodeView"
android:layout_below="#+id/txtCodeText"
android:layout_marginTop="23dp"
android:ems="10" />
<TextView
android:id="#+id/txtCodeText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/edBarCode"
android:layout_below="#+id/txtInfo"
android:layout_marginRight="86dp"
android:text="#string/code_text"
android:textColor="#000"
android:textSize="20dip" />
</RelativeLayout>
I need to Linearlayout "#+id/linearCodeView" insert my BarCodeView.
View is not visible after adding LinearLayout.

RelativeLayout.LayoutParams paramsBottom = new RelativeLayout.LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT,
android.view.ViewGroup.LayoutParams.WRAP_CONTENT);
rl.addView(ll, paramsBottom); //add linearlayout in relativelayout
Edit:-
LinearLayout.LayoutParams paramsBottom2 = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
ll.addView(Barview, paramsBottom2);//add Barview in linearlayout
OR
RelativeLayout.LayoutParams paramsBottom2 = new RelativeLayout.LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT,
android.view.ViewGroup.LayoutParams.WRAP_CONTENT);
rl.addView(Barview, paramsBottom2);//add Barview in relativelayout

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