Best way to respond to Button within listview within fragment

Best way to respond to Button within listview within fragment

By : user2955980
Date : November 22 2020, 10:48 AM
this will help The basic strategy of passing an "owner" object to an adapter is quite kosher, and very common. Often I will make a listener interface, and have the parent activity or fragment implement the interface. Since it is your activity that is responding to the click, you wouldn't even need to pass the reference to the fragment and then the adapter. You could just get the View's context, and check if it implements the interface. Like this:
code :
public interface SoundChooser {
    void chooseSoundForIndex(int position);
viewHolder.soundButton.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
        Log.d(TAG, "Sound button tapped at position " + position);
        Context context = v.getContext();
        if (context instanceof SoundChooser) {
        } else {
            Log.w(TAG, "Activity should implement SoundChooser:" + context.getClass().getName());

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ListView edit command button won't respond

ListView edit command button won't respond

By : Federico Fenara
Date : March 29 2020, 07:55 AM
wish of those help My bad - I had validator elsewhere on the form, so the link appeared to be doing nothing because it was tripping the validation.
Button Inside Android ListView doesnt respond to clicks

Button Inside Android ListView doesnt respond to clicks

By : Anton Kostash
Date : March 29 2020, 07:55 AM
around this issue Well this isn't really an answer, but after rewriting this a few times I managed to fix it so that it functions exactly the way I wanted.
This time I left all of the data separate from each view and had each list item be a custom class inheriting RelativeLayout and also implementing its own OnClickListener for its specific infoBtn.
code :
public View getView(int position, View convertView, ViewGroup parent) {

    if(convertView != null && (convertView instanceof FriendListItem2))
        ((FriendListItem2) convertView).setFriendInfo(friends.get(position));
        convertView = new FriendListItem2(getContext(), friends.get(position));

    return convertView;
Is it possible to get a Button view from ListView Fragment instead of ListView Adapter?

Is it possible to get a Button view from ListView Fragment instead of ListView Adapter?

By : Prakash Poudyal
Date : March 29 2020, 07:55 AM
will help you Here is the answer from the comments :
Your button is located in a row of your ListView, so you can only find it from your list adapter (in getView()). Calling findViewById() from your fragment can't return views contained in your ListView.
How can I add a row to a ListView in one Fragment by clicking the button in another Fragment?

How can I add a row to a ListView in one Fragment by clicking the button in another Fragment?

By : user2786401
Date : March 29 2020, 07:55 AM
wish of those help Your problem is that you are creating your fragments in your activity's onCreate, again in your pager adapter, and once more in onButtonClicked (FragmentB). You should only be creating them once. Since you are doing all of this inside your Activity, the easiest would be to keep references to your fragments in Activity fields. However, you need to make sure you handle the case of your activity getting re-created, because in this case Android will have re-created your fragments already, and you would not need to create and add them again.
code :
public class MainActivity extends ActionBarActivity implements ActionBar.TabListener, FragmentA.ButtonClickListener{
    private static final int NUM_PAGES = 2;
    private ViewPager mPager;
    private PagerAdapter mPagerAdapter;
    private ActionBar actionBar;
    private String[] tabs = { "A", "B"};    
    private Fragment frag1;
    private Fragment frag2;
    protected void onCreate(Bundle savedInstanceState) {
        // First check if Android has already created the fragments
        FragmentManager fragMgr = getSupportFragmentManager();
        frag1 = fragMgr.findFragmentByTag("frag1Tag");
        frag2 = fragMgr.findFragmentByTag("frag2Tag");
        if (frag1 == null && frag2 == null) {
            // Create and add fragments only if needed
            frag1 = new FragmentA();
            frag2 = new FragmentB();
            FragmentTransaction fragmentTransaction = fragMgr.beginTransaction();
            fragmentTransaction.add(frag1, "frag1Tag");
            fragmentTransaction.add(frag2, "frag2Tag");
        mPager = (ViewPager) findViewById(R.id.pager);
    private class ViewPagerAdapter extends FragmentStatePagerAdapter {
        public ViewPagerAdapter(FragmentManager fm) {
        public Fragment getItem(int position) {
            switch (position){
                case 0:
                    return frag1;
                case 1:
                    return frag2;
            return null;
        public int getCount() {
            return NUM_PAGES;
    public void onButtonClicked() {  // IMPLEMENTATION OF INTERFACE METHOD
I have a checkbox inside a fragment and i want to it respond on click of a button this button is inside my main activity

I have a checkbox inside a fragment and i want to it respond on click of a button this button is inside my main activity

By : shhaugen
Date : March 29 2020, 07:55 AM
should help you out You can use interface to communicate back to MainActivity.
Create a interface and implement it on MainActivity. Pass the implemented interface to fragment and store it in the fragment Then When your checkbox state change check that the stored interface is null or not if not null then call the implemented method of the interface, which is actually implemented in MainActivity. This way you can communicate back to MainActivity. In MainActivity store your checkbox state and do what you want to do in button press.
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