Develop Reference

Android - Adding Buttons into an existing layout programatically - android

I am building a soundboard app, where I have some predefined buttons in a tablelayout, which is nested inside a relative layout. The layout is an own fragment (I use multiple tabs for different categories).
Sound and tabs are working fine, now I want to implement the function, that you generate a new button, once you click the "+" button and that the "+" button moves one row beneath the new button.
Is there a way to generate a new tablelayout, with the same attributes as the already existing without having to use blanks inside the xml-file?

try this simple example and modify as per your requirement
public class MainActivity extends Activity {
Context context;
ScrollView scrollView;
LinearLayout container;
LinearLayout layout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
context = this;
setContentView(R.layout.activity_main);
layout = (LinearLayout) findViewById(R.id.LinearAdd);
}
public void addButton(View view) {
Button button = new Button(MainActivity.this);
LayoutParams lp = new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT );
button.setLayoutParams(lp);
button.setText("ADDED");
layout.addView(button);
}
}
And this your xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<LinearLayout
android:id="#+id/LinearAdd"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="70"
android:orientation="vertical" >
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="addButton"
android:text="click to add" />
</LinearLayout>
</LinearLayout>

Here is my layout fragment code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TableLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:stretchColumns="*"
android:id="#+id/tableLayout">
<TableRow
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_column="1">
<Button
android:background="#drawable/button"
style="#style/button_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/tab01sound01"
android:layout_column="0"
android:text="#string/buttonAlan" />
</TableRow>
</TableLayout>
<TableLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:stretchColumns="*"
android:layout_below="#+id/tableLayout2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:id="#+id/thirdTable">
</TableLayout>
</RelativeLayout>

And this is the code from my first fragment tab
public class Tab1 extends Fragment {
private int buttonAmount = MainActivity.getButtonAmountTab1();
private Button[] button = new Button[buttonAmount + 1];
private Sound sound;
private String packageName = MainActivity.getStringPackageName();
private Button addButton;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
sound = MainActivity.getSound();
View rootView = inflater.inflate(R.layout.fragment_fun, container, false);
//This generates the Audio functionality for each button
for (int i = 1; i < buttonAmount + 1; i++) {
String buttonID = "tab01sound0" + i;
int resID = getResources().getIdentifier(buttonID, "id", packageName);
final int audioID = getResources().getIdentifier(buttonID, "raw", packageName);
button[i] = (Button) rootView.findViewById(resID);
registerForContextMenu(button[i]);
button[i].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
sound.playSound(audioID);
}
});
}
//functionality for the "+" button
addButton = (Button) rootView.findViewById(R.id.addButton);
addButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
CreateDialog newDialog = new CreateDialog();
newDialog.AlertBox(getActivity());
}
});
return rootView;
}
}

Related

i am creating an application, which i use to create a list of things that i have in SQLite database
i created a Fragment with a button that add a xml file to my LinearLayout , it works good , but i want to grab EditText and Spinner data and put them in a JSONobject but i don't know how , i don't have IDs of dynamically created views
My Fragment XML
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/itemsContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="50dp"
android:orientation="vertical"
android:paddingTop="20dp">
</LinearLayout>
</ScrollView>
<android.support.design.widget.FloatingActionButton
android:id="#+id/addItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_margin="16dp"
app:srcCompat="#drawable/fab_add"
/>
</RelativeLayout>
My field (addView) XML
<LinearLayout android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="horizontal"
android:weightSum="3"
xmlns:android="http://schemas.android.com/apk/res/android">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1"
android:gravity="center_horizontal"
android:orientation="horizontal"
android:weightSum="2">
<Button
android:id="#+id/add"
android:onClick="onIncrease"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="center"
android:background="#drawable/ic_add_circle_black_24dp" />
<Button
android:id="#+id/remove"
android:onClick="onDecrease"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="center"
android:layout_marginLeft="10dp"
android:background="#drawable/ic_remove_circle_black_24dp" />
</LinearLayout>
<EditText
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:inputType="number"
android:hint="#string/number"
/>
<Spinner
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
Fragment.java File
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_newfactor,container,false);
fab = v.findViewById(R.id.addItem);
ln = v.findViewById(R.id.itemsContainer);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View rowView = inflater.inflate(R.layout.field, null);
final EditText editText = rowView.findViewById(R.id.number);
Button add = rowView.findViewById(R.id.add);
Button remove = rowView.findViewById(R.id.remove);
Button clear = rowView.findViewById(R.id.clear);
Spinner spinner = rowView.findViewById(R.id.spinner);
list = new ArrayList<>();
dbConnector = new DbConnector(getContext(),null,null,1);
Cursor c = dbConnector.get().rawQuery("SELECT * FROM product",null);
while (c.moveToNext()){
int id = c.getInt(c.getColumnIndex("id"));
String name = c.getString(c.getColumnIndex("name"));
String desc = c.getString(c.getColumnIndex("description"));
String price = c.getString(c.getColumnIndex("price"));
list.add(new SpinnerObject(id,name,price));
}
spinnerAdapter = new ir.animelist.localshop.Adaptors.SpinnerAdapter(getContext(),android.R.layout.simple_list_item_1,list);
spinner.setAdapter(spinnerAdapter);
add.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int num = Integer.parseInt(editText.getText().toString());
int num_num = num + 1;
editText.setText(num_num + "");
}
});
remove.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int num = Integer.parseInt(editText.getText().toString());
if(num > 0){
int num_num = num - 1;
editText.setText(num_num + "");
}
}
});
clear.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ln.removeView((View) v.getParent());
}
});
ln.addView(rowView, ln.getChildCount() - 1);
}
});
return v;
}

You need to use the recyclerview to display your list items. Using recyclerview you can get view like -
View view = recyclerview.findViewHolderForAdapterPosition(pos).itemView;
Spinner spinner = view.findViewById(R.id.mySpinner);
This will return you a spinner of whichever position you have passed and afterwards get data from it.
Similarly, you can get view of edittext by using -
EditText edtTxt = view.findViewById(R.id.myEdtTxt);
To see how to get data from database and display that in recyclerview, check the example here - https://github.com/incipientinfo/db-queries

I define layout row which I inflate and add view pragmatically to a linear layout.
I wanna something like this,
https://i.stack.imgur.com/EKPmJ.png
Here is xml of my main activity where I am inflating the costume view row
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
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:orientation="vertical"
tools:context="com.skw.customeviewdemo.MainActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/inflate"
android:text="inflate"/>
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/list_container">
</LinearLayout>
</LinearLayout>
here is my xml code of row which I am inflating:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="its text view"
/>
<Button
android:id="#+id/nameButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/name"
/>
<ImageView
android:layout_marginTop="-25dp"
android:layout_alignParentRight="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#mipmap/ic_launcher_round"/>
</RelativeLayout>
here is my java code
public class MainActivity extends AppCompatActivity {
Button b;
LinearLayout l1;
Context context;
Boolean isViewCreated = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final String Namearray[] = {"sagar", "ranjeet", "akash", "kate"};
this.context = this;
b = (Button) findViewById(R.id.inflate);
l1 = (LinearLayout) findViewById(R.id.list_container);
createViews(Namearray);
b.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(l1.getVisibility() == View.VISIBLE && isViewCreated)
{
l1.setVisibility(View.GONE);
}
else
{
l1.setVisibility(View.VISIBLE);
}
}
});
}
void createViews(final String[] namearray)
{
for(int i=0;i < namearray.length;i++){
final int j = i;
View view = LayoutInflater.from(context).inflate(R.layout.layout_item,null);
TextView button1 = (TextView) view.findViewById(R.id.name);
Button button2 = (Button) view.findViewById(R.id.nameButton);
button1.setText("HELLO " + namearray[i]);
button2.setText("Click to know my name ");
button2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(context,"Hello " + namearray[j],Toast.LENGTH_LONG).show();
}
});
view.setId(generateViewId());
try {
l1.addView(view);
isViewCreated = true;
}
catch (Exception e)
{
}
}
l1.setVisibility(View.GONE);
}
private static final AtomicInteger viewIdGenerator = new AtomicInteger(15000000);
public static int generateViewId() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
return generateUniqueViewId();
} else {
return View.generateViewId();
}
}
private static int generateUniqueViewId() {
while (true) {
final int result = viewIdGenerator.get();
// aapt-generated IDs have the high byte nonzero; clamp to the range under that.
int newValue = result + 1;
if (newValue > 0x00FFFFFF) newValue = 1; // Roll over to 1, not 0.
if (viewIdGenerator.compareAndSet(result, newValue)) {
return result;
}
}
}
}
but when I inflate row my image view get cutoff which I not want I tried with negative margin but it not work
here what it looks like
custom overlapping row
what I do so I over lap image to above view?

Try changing your layout to this.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="its text view"
/>
<Button
android:id="#+id/nameButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/name"
/>
</RelativeLayout>
<ImageView
android:layout_marginTop="25dp"
android:layout_alignParentRight="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#mipmap/ic_launcher_round"/>
</RelativeLayout>
When you put in another row, that row needs to be pushed up so the android icon that is there now overlays it.

I have a class that extends a Fragment. I want when press a button from An Activity to opens this Fragment with its layout in dialog in addition to that the fragment opens normally in its place. Is this possible?
This is my Fragment (TipsFragment.java)
public class TipsFragment extends Fragment{
ListView list;
TipsAdapter tipsAdapter;
AlertDialog PageDialog;
DAO db;
Cursor c;
ArrayList<HashMap<String, String>> tipsList;
HashMap<String, String> map;
ArrayList<HashMap<String, String>> pages;
Integer tipType;
ImageButton page;
ImageButton add;
ImageButton search;
EditText inputAdd;
EditText inputSearch;
ImageView addImage;
RelativeLayout layoutAdd;
RelativeLayout layoutSearch;
int itemSelected;
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
db = new DAO(activity);
db.open();
}
public TipsFragment(){}
public TipsFragment(int tipType, int itemSelected ){
this.tipType = tipType;
this.itemSelected = itemSelected;
}
#Override
public View onCreateView(final LayoutInflater inflater, final ViewGroup container,
final Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.tips_fragement, container, false);
System.out.println("tipType: "+tipType);
System.out.println("itemSelected: "+itemSelected);
page = (ImageButton) rootView.findViewById(R.id.pager);
add = (ImageButton) rootView.findViewById(R.id.add);
search = (ImageButton) rootView.findViewById(R.id.search);
inputSearch = (EditText) rootView.findViewById(R.id.inputSearch);
inputAdd = (EditText) rootView.findViewById(R.id.inputAdd);
addImage = (ImageView) rootView.findViewById(R.id.imageAdd);
layoutAdd = (RelativeLayout) rootView.findViewById(R.id.layoutAdd);
layoutSearch = (RelativeLayout) rootView.findViewById(R.id.layoutSearch);
if (tipType != 0) {
switch (tipType) {
case 1:
System.out.println("All tips");
if (getActivity().getIntent().getStringExtra("startFrom") == null) {
c = db.getTips("0");
} else {
c = db.getTips(getActivity().getIntent().getStringExtra("startFrom"));
}
break;
case 2:
System.out.println("favorite tips");
c = db.getFavoriteTips();
page.setVisibility(View.GONE);
System.out.println("in favorite, count_records: "+c.getCount());
break;
}
}
System.out.println("count_records: "+c.getCount());
if (c.getCount() != 0) {
if (getActivity().getIntent().getStringExtra("startLabel") != null) {
page = (ImageButton) rootView.findViewById(R.id.pager);
}
tipsList = new ArrayList<HashMap<String, String>>();
list = (ListView) rootView.findViewById(R.id.tipList);
do {
map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(DAO.TIP_ID, c.getString(c.getColumnIndex(c.getColumnName(0))));
map.put(DAO.TIP_CONTENT, c.getString(c.getColumnIndex(c.getColumnName(1))));
// adding HashList to ArrayList
tipsList.add(map);
} while (c.moveToNext());
// Getting adapter by passing xml data ArrayList
tipsAdapter = new TipsAdapter(getActivity(), tipsList);
list.setAdapter(tipsAdapter);
// Click event for single list row
list.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
map = tipsList.get(position);
System.out.println("in list select item, tipType: "+tipType);
if (!MainActivity.tSlidingLayer.isOpened()) {
MainActivity.tSlidingLayer.openLayer(true);
}
}
});
page.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Strings to Show In Dialog with Radio Buttons
}
});
add.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
}
});
search.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
}
});
inputSearch.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
});
}
addImage.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(getActivity(), "addImage pressed", Toast.LENGTH_LONG).show();
}
});
return rootView;
}
}
and this is layout tips_fragement.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginLeft="10dp"
android:layout_marginRight="5dp"
android:orientation="vertical" >
<LinearLayout
android:id="#+id/titleBar"
android:layout_width="match_parent"
android:layout_height="50dp"
android:gravity="center"
android:orientation="horizontal" >
<ImageButton
android:id="#+id/add"
android:layout_width="45dp"
android:layout_height="35dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:scaleType="fitXY"
android:src="#drawable/add" />
<ImageButton
android:id="#+id/search"
android:layout_width="45dp"
android:layout_height="35dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:scaleType="fitXY"
android:src="#drawable/search" />
<ImageButton
android:id="#+id/pager"
android:layout_width="45dp"
android:layout_height="35dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:scaleType="fitXY"
android:src="#drawable/pager" />
</LinearLayout>
<View
android:layout_width="fill_parent"
android:layout_height="5dip"
android:background="#drawable/shadow" >
</View>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/layoutAdd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone" >
<EditText
android:id="#+id/inputAdd"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="Add" />
<ImageView
android:id="#+id/imageAdd"
android:padding="5dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/inputAdd"
android:layout_alignBottom="#+id/inputAdd"
android:layout_alignRight="#+id/inputAdd"
android:src="#android:drawable/ic_menu_add" />
</RelativeLayout>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/layoutSearch"
android:visibility="gone" >
<EditText
android:id="#+id/inputSearch"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="Search"/>
<ImageView
android:id="#+id/imageSearch"
android:padding="5dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/inputSearch"
android:layout_alignBottom="#+id/inputSearch"
android:layout_alignRight="#+id/inputSearch"
android:src="#android:drawable/ic_menu_search" />
</RelativeLayout>
<ListView
android:id="#+id/tipList"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/buttons"
android:divider="#351802"
android:dividerHeight="2dp"
android:listSelector="#drawable/list_selector" />
</LinearLayout>

Since Android supports nesting Fragments (available in the support library) you could show your TipsFragment as a content of another DialogFragment. Avoid this solution whenever possible.
A better solution would be to make TipsFragment extend DialogFragment and that way you can either show the Fragment inline or in a dialog.
1 - Make TipsFragment extends DialogFragment
public class TipsFragment extends DialogFragment {...}
2 - On button click use FragmentTransaction.add or FragmentTransaction.replace to show the DialogFragment inline or include it in your layout and change its visibility.
3 - Show the TipsFragment as a dialog
TipsFragment fr = new TipsFragment();
fr.show(getSupportFragmentManager(), "dialog_fragment_tag");
Guide: Performing Fragment Transactions. More samples are available in the ApiDemos application from the SDK samples

This is the new code, It doesn't throw exceptions, but I can't see my custom control "Second". This is the new code:
activity_main.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/layoutRoot"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:id="#+id/L1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical" >
<Button
android:id="#+id/addButton"
android:layout_width="74dp"
android:layout_height="wrap_content"
android:text="Add" />
<EditText
android:id="#+id/newEditText"
android:layout_width="174dp"
android:layout_height="wrap_content"
android:layout_weight="3.24"
android:ems="10"
android:inputType="text" />
</LinearLayout>
<LinearLayout
android:id="#+id/List"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
This is the custom control: second.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/secodView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="#+id/expandButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.44"
android:text = "Expand"/>
<TextView
android:id="#+id/txtView"
android:layout_width="253dp"
android:layout_height="wrap_content"
android:layout_weight="0.56"
android:ems="10"
android:text = "LOL"/>
</LinearLayout>
<RadioGroup
android:id="#+id/ratingRadioGroup"
android:layout_width="321dp"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<RadioButton
android:id="#+id/likeButton"
android:layout_width="145dp"
android:layout_height="wrap_content"
android:checked="true"
android:text="Like" />
<RadioButton
android:id="#+id/dislikeButton"
android:layout_width="147dp"
android:layout_height="wrap_content"
android:text="Dislike" />
</RadioGroup>
</LinearLayout>
Second.java class:
public class Second extends ViewGroup
{
private Button mExpandButton;
private RadioButton mLikeButton;
private RadioButton mDislikeButton;
private TextView mText;
private RadioGroup mLikeGroup;
private ViewGroup vGroup;
OnClickListener myClickListener = new OnClickListener()
{
#Override
public void onClick(View v)
{
String s= mExpandButton.getText().toString();
if (s.equals("One Click"))
mExpandButton.setText("Other Click");
else
mExpandButton.setText("One Click");
}
};
OnCheckedChangeListener myCkeckListener = new OnCheckedChangeListener()
{
#Override
public void onCheckedChanged(RadioGroup group, int checkedId)
{
if (mLikeButton.isChecked())
mText.setText("I Like it");
if (mDislikeButton.isChecked())
mText.setText("I Don't Like it");
}
};
public Second(Context context)
{
super(context);
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = LayoutInflater.from(context).inflate(R.layout.second, this, true);
mText = (TextView)this.findViewById(R.id.txtView);
mExpandButton = (Button) this.findViewById(R.id.expandButton);
mLikeGroup = (RadioGroup)this.findViewById(R.id.ratingRadioGroup);
mExpandButton.setOnClickListener(myClickListener);
mLikeGroup.setOnCheckedChangeListener(myCkeckListener);
//inflater.inflate(R.layout.second, null);
}
#Override
protected void onLayout(boolean arg0, int arg1, int arg2, int arg3, int arg4)
{
// TODO Auto-generated method stub
}
}
ActivityMain.java class, where the activity gets started:
public class MainActivity extends Activity
{
protected LinearLayout mList;
protected EditText mEditText;
protected Button mButton;
Second[] sec;
boolean unavez;
OnClickListener myClickListener = new OnClickListener()
{
#Override
public void onClick(View v)
{
}
};
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mList = (LinearLayout)findViewById(R.id.List);
mEditText = (EditText)findViewById(R.id.newEditText);
mButton = (Button)findViewById(R.id.addButton);
sec = new Second[4];
unavez = true;
for (int i=0; i<4; i++)
sec[i]= new Second(this);
}
#Override
protected void onStart()
{
super.onStart();
}
#Override protected void onResume()
{
super.onResume();
if (!unavez)
return;
for (int i=0; i<4; i++)
{
mList.addView(sec[i]);
//setContentView(sec[i]);
}
unavez = false;
}
#Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
When running, I can see the Button and the EditText in activity_main.xml, but I can't see my custom control in second.xml. If I use the line setContentView(sec[i]) instead of mList.addView(sec[i]) in onResume(), it gets worse: the EditText and the Button in activity_main.xml aren't visible and I get a blank layout.
How can I add my custom control to activity_main.xml and make it visible to user?

You elected to have Second inherit directly from ViewGroup. Since you did that, Second needs to be a real ViewGroup, with a real onLayout() implementation and everything else that goes along with being a ViewGroup. Do not just randomly override methods with do-nothing implementations, then complain when the do-nothing implementations do nothing.
Creating "custom controls" is a relatively advanced topic in Android. Newcomers to Android should focus on other solutions to whatever problem they think a "custom control" will somehow solve.

I'm trying to create a DialogFragment with a ListView and some Buttons. I'm declaring all of them i the layout file and the buttons are working fine but the ListView is null when i use fineViewByID().
Here's my xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/category_picker"
android:layout_gravity="center"
android:orientation="vertical" >
<ListView
android:id="#+id/lvCategorys"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.5" >
</ListView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_gravity="bottom"
android:layout_weight="0.5"
android:orientation="horizontal" >
<Button
android:id="#+id/btnAddNew"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:text="#string/cpf_btnAddNew" />
<Button
android:id="#+id/btnConfig"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:text="#string/cpf_btnConfig" />
</LinearLayout>
</LinearLayout>
And here is the FragmentDialog:
package com.example.spendo.fragments;
imports....
public class CategoryPickerFragment extends DialogFragment implements OnItemClickListener{
private CategoryGroup categoryGroup;
private ListView lvCategorys;
private ArrayAdapter<String> lvAdapter;
private Button btnAddNew, btnConfig;
public CategoryPickerFragment() {
// Empty constructor required for DialogFragment
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_category_picker, container);
getDialog().setTitle("Hello");
categoryGroup = General.getActiveCategoryGroup(this.getActivity());
System.out.println(categoryGroup);
btnAddNew = (Button) this.getActivity().findViewById(R.id.btnAddNew);
btnConfig = (Button) this.getActivity().findViewById(R.id.btnConfig);
lvCategorys = (ListView) this.getActivity().findViewById(R.id.lvCategorys);
if(lvCategorys == null){ //this returns "lvCategorys is null"
System.out.println("lvCategorys is null");
}else{
System.out.println(lvCategorys + " is not null");
}
lvAdapter = new ArrayAdapter<String>(this.getActivity(),android.R.layout.simple_list_item_1, categoryGroup.getNameArray());
System.out.println(lvAdapter);
ArrayList<String> nameArray = categoryGroup.getNameArray();
lvAdapter.clear();
for(int i = 0; i < nameArray.size(); i++){
lvAdapter.add((String) nameArray.get(i));
}
lvAdapter.notifyDataSetChanged();
lvCategorys.setAdapter(lvAdapter);
return view;
}
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
}
}
Does anyone see my problem. (I'm quite new to android, altho i've done some java in the past).
//Sverker

I think you need to replace
btnAddNew = (Button) this.getActivity().findViewById(R.id.btnAddNew);
btnConfig = (Button) this.getActivity().findViewById(R.id.btnConfig);
lvCategorys = (ListView) this.getActivity().findViewById(R.id.lvCategorys);
with
btnAddNew = (Button) view.findViewById(R.id.btnAddNew);
btnConfig = (Button) view.findViewById(R.id.btnConfig);
lvCategorys = (ListView) view.findViewById(R.id.lvCategorys);