Develop Reference

Android: Showing a toast message when the checkbox is checked for the dynamically created checkboxes

When an ImageButton is clicked a checkBox is created dynamically in my app.
The problem I'm facing is with toast messages not showing or let's say the listener I am using for the checkboxes to show a toast message when the checkbox is checked is working only for the current/latest checkbox that has been created. Not for the checkboxes that had been created previously.
Problem,
I saw that the problem could be with the variable (toDoCheckBox) I am using to save the newly created checkbox instance and every time it's getting overriding dynamically as I create newer checkboxes. So for the previous checkboxes, there is no reference pointing to them in order for the listener to work. (the problem could be this or not, i don't know for sure) Even if this is the problem i don't know how to solve it
What i tried is that,
creating the instance of checkbox on both onCreate as well as the createCheckBox method so that I could assign the listener in both the places.
on the onCreate()
on the createCheckbox()
Only the latest created checkbox works and shows the toast messages
Can someone help me or guide me with the problem,
I want the toast message to show for every checkboxes
i posted only the code that could be of some use
private CheckBox toDoCheckBox;
private EditText defaultEditText;
private List<CheckBox> listCheckBoxes;
private int previousViewId = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.defaultEditText = findViewById(R.id.defaultEditText);
toDoCheckBox = new CheckBox(this);
this.listCheckBoxes = new ArrayList<>();
this.checkBoxListener = new View.OnClickListener(){
#Override
public void onClick(View view){
if(toDoCheckBox.isChecked()){
toDoCheckBox.setChecked(true);
Toast.makeText(MainActivity.this,"You did a good work, keep it up!",Toast.LENGTH_SHORT).show();
}
}
};
toDoCheckBox.setOnClickListener(checkBoxListener);
}
public void createCheckBox() {
//CREATING A CHECKBOX
toDoCheckBox = new CheckBox(this);
toDoCheckBox.setText(defaultEditText.getText().toString());
toDoCheckBox.setTextSize(20);
toDoCheckBox.setId(View.generateViewId());
ConstraintLayout.LayoutParams params = (ConstraintLayout.LayoutParams) defaultEditText.getLayoutParams();
ConstraintLayout.LayoutParams newParams = new ConstraintLayout.LayoutParams(
ConstraintLayout.LayoutParams.WRAP_CONTENT,
ConstraintLayout.LayoutParams.WRAP_CONTENT
);
newParams.width = params.width;
newParams.height = params.height;
//Constraints
newParams.startToStart = params.startToStart;
newParams.endToEnd = params.endToEnd;
newParams.topToTop = params.topToTop;
newParams.topToBottom = params.topToBottom;
//Margins
newParams.leftMargin = params.leftMargin;
newParams.topMargin = params.topMargin;
newParams.bottomMargin = params.bottomMargin;
newParams.rightMargin = params.rightMargin;
constraintLayout.addView(toDoCheckBox, -1, newParams);
previousViewId = toDoCheckBox.getId();
defaultEditText.setVisibility(View.INVISIBLE);
createEditText();
toDoCheckBox.setOnClickListener(checkBoxListener);
this.listCheckBoxes.add(toDoCheckBox);
totalCheckBox++;
}

Try to use the local checkbox object instead of the global toDoCheckBox.

Get text from dynamically created EditText on click of a button

I am creating a dynamic layout in which I have 2 EditText and one Button. On click of a button a new same king of layout is created. I want , when I click on the button I should be able to get data from edittexts and store them and then add new layout.I am not able to get data from edittext , it is coming up blank.
Below is my code . I am also adding screenshot of my layout
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
ll_newView = (LinearLayout)findViewById(R.id.ll_newView);
scrollView = (ScrollView)findViewById(R.id.scrollView);
bt_addView = (Button)findViewById(R.id.bt_addView);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.MATCH_PARENT);
LinearLayout one = new LinearLayout(MainActivity2.this);
//=====First EditText======//
params.weight = 5.0f;
params.setMargins(16,8,8,16);
EditText et_one = new EditText(MainActivity2.this);
et_one.setPadding(10,10,10,10);
et_one.setHint("Edit Text 1");
et_one.setBackground(getResources().getDrawable(R.drawable.edit_text_border));
et_one.setLayoutParams(params);
one.addView(et_one);
//=====Second EditText======//
EditText et_two = new EditText(MainActivity2.this);
et_two.setPadding(10,10,10,10);
et_two.setHint("Edit Text 2");
et_two.setBackground(getResources().getDrawable(R.drawable.edit_text_border));
et_two.setLayoutParams(params);
one.addView(et_two);
Button bt_plus = new Button(MainActivity2.this);
bt_plus.setText("+");
one.addView(bt_plus);
ll_newView.addView(one);
bt_plus.setOnClickListener(getOnClickDoSomething(et_one.getText().toString().trim(),et_two.getText().toString().trim()));
}
View.OnClickListener getOnClickDoSomething(final String one1,final String two1) {
return new View.OnClickListener() {
public void onClick(View v) {
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.MATCH_PARENT);
LinearLayout one = new LinearLayout(MainActivity2.this);
Log.e("========","=====one ="+one1+"=========two = "+two1);
//=====First EditText======//
params.weight = 5.0f;
params.setMargins(16,8,8,16);
EditText et_one = new EditText(MainActivity2.this);
et_one.setPadding(10,10,10,10);
et_one.setHint("Edit Text 1");
et_one.setBackground(getResources().getDrawable(R.drawable.edit_text_border));
et_one.setLayoutParams(params);
one.addView(et_one);
//=====Second EditText======//
EditText et_two = new EditText(MainActivity2.this);
et_two.setPadding(10,10,10,10);
et_two.setHint("Edit Text 2");
et_two.setBackground(getResources().getDrawable(R.drawable.edit_text_border));
et_two.setLayoutParams(params);
one.addView(et_two);
Button bt_plus = new Button(MainActivity2.this);
bt_plus.setText("+");
one.addView(bt_plus);
ll_newView.addView(one);
bt_plus.setOnClickListener(getOnClickDoSomething(et_one.getText().toString().trim(),et_two.getText().toString().trim()));
Log.e("========","=====one ="+et_one.getText().toString().trim()+"=========two = "+ et_two.getText().toString().trim());
}
};
}

You are passing to the getOnClickDoSomething function the text of the newly created editText, so understandably it will be blank. What you may want is to change getOnClickDoSomething, so that it accepts reference to the editTexts themselves, and later you can retrieve the their current text. (You will have to be careful not to leak views, as you have anonymous classes holding on to the Views.)
Example: Just change the following lines as follows
bt_plus.setOnClickListener(getOnClickDoSomething(et_one, et_two)); }
View.OnClickListener getOnClickDoSomething(final EditText one1,final EditText two1)
Log.e("========","=====one ="+one1.getText().toString().trim(),+"=========two = "+two1.getText().toString().trim());

Create RecyclerView UI dynamically - Android

I am working on an e-commerce App . Here I am working on Products Filtering .
Here filters are dynamic, It means once filter page will display BRANDS and PRICE then next time it can display BRANDS , PRICE , STYLES ..etc .
There may be many cases to filter products .
Application is receiving filters dynamically from Webservice .
So here I am creating filters dynamically using data received from the webservice . For this I am using RecyclerView to display dynamic filters
.
Here is the code of RecyclerView where I am creating filters dynamically .
onCreateViewHolder() :
#Override
public FilterViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LinearLayout topLayout = new LinearLayout(mContext);
topLayout.setOrientation(LinearLayout.VERTICAL);
if (filterItems != null) {
for (int filterItemsCount = 0; filterItemsCount < filterItems.size(); filterItemsCount++) {
LinearLayout ll = new LinearLayout(mContext);
ll.setOrientation(LinearLayout.VERTICAL);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParams.setMargins(10, 10, 10, 10);
AFileterItem filterItem = filterItems.get(filterItemsCount);
TextView textView = new TextView(mContext);
textView.setText(filterItem.getFiletrLabel());
ll.addView(textView);
for (int i = 0; i < filterItem.getList().size(); i++) {
VlauesItem item1 = filterItem.getList().get(i);
CheckBox cb = new CheckBox(mContext);
cb.setId(i);
cb.setText(item1.getValueItemLabel());
cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
Toast.makeText(mContext, String.valueOf(isChecked), Toast.LENGTH_SHORT).show();
}
});
ll.addView(cb);
}
topLayout.addView(ll);
}
}else{
topLayout.addView(null);
}
FilterViewHolder viewHolder = new FilterViewHolder(topLayout);
return viewHolder;
}
Now , the problem is :
When I create filters dynamically then RecyclerView creates same filter more than once .
I want to know how should I manage above code so that I can eliminate this problem .

You need to understand what ViewHolders are. ViewHolder of a concrete type has single layout. If it is possible consider creating different viewholder types, or one with predefined layout, which will be customized in onBind callback. What you see is happening, because RecyclerView reuses view, and calls onCreateViewHolder only to fill the screen with items, then they are reused.

getText from all TextView which created by user

This is my Add button code which will get the text from AutoCompleteTextView and list into ListView on each click of Add button. I am so confusing about getting text from all TextView which created by user.
Because I need to compare the user inputs in all TextViewwith symptoms column in database to diagnose the disease. Hope you guys can help me =)
private OnClickListener onClick() {
return new OnClickListener() {
#Override
public void onClick(View v) {
mLayout.addView(createNewTextView(mEditText.getText().toString()));
}
};
}
private TextView createNewTextView(String text) {
final LayoutParams lparams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
final TextView textView = new TextView(this);
textView.setLayoutParams(lparams);
//textView.setText("Symptom: " + text);
textView.setText(text);
return textView;
}

You can maintain a ArrayList where you can store all the getText() if all the text views.
Just define and initialize your arraylist before you use it.
Initialize like below
ArrayList<String> arrayList = new ArrayList<String>();
And in createNewTextView() method you can have the below line to add the names to arraylist
arrayList.add(text)
later you can use these arraylist for reference and get all the text entered by user

How to find out if an EditText has been created?

In a dialog layout, I create a second EditText programmatically depending on user choices. When I want to return the inputs, I need to know if a second EditText has been created or not. And I don't understand how to make this check. My statement if (edittextTwo != null) is always null, even when the second EditText has been displayed and entered text into.
Here are the methods which create the second EditText and return their inputs:
if (edittextTwo != null)
private void displayASecondEdittext(String title) {
ViewGroup layout = (ViewGroup) findViewById(R.id.layout_editdialog);
TextView titleTwo = new TextView(this);
titleTwo.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
titleTwo.setText(title);
layout.addView(titleTwo);
EditText edittextTwo = new EditText(this);
edittextTwo.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
layout.addView(edittextTwo);
}//END displayASecondInputfield
private void returnResult() {
Intent resultIntent = new Intent(this, EditDialog.class);
resultIntent.putExtra(EDITONE, edittextOne.getText().toString());
if (edittextTwo != null) {
resultIntent.putExtra(EDITTWO, edittextTwo.getText().toString());
Log.v(TAG, "edittextTwo ="+edittextTwo.getText().toString());
}
setResult(Activity.RESULT_OK, resultIntent);
finish();
}//END returnResult

move EditText edittextTwo; out side of your method. put it here:
public class myActivity extends Activity
EditText edittextTwo = null;
And then, in your DisplayASecondEditText(), do this instead of what you have:
edittextTwo = new EditText(this);
This will make your declaration global, and allow all all methods to access the variable.

I don't understand how your code above even compiles, since edittextTwo is a local variable in displayASecondEdittext. Make it a member variable in your activity and it should work.