如何从父级的OnClickListener获取子级视图ID？

Question

I have a simple LinearLayout with multiply Buttons inside.

<LinearLayout android:id="@+id/parent">
   <Button android:id="@+id/child_1">
   <Button android:id="@+id/child_2">
   <Button android:id="@+id/child_3">
   ...
</LinearLayout>

I set OnClickListener to parent LinearLayout and when I click on any child Buttons onClick method is called. How I can know id of clicked Button?

Note. I don't want to set OnClickListener to each Button or add onClick="someMethod" in xml layout.

Answer 1

maybe this will work

make your activity implement View.OnClickListener interface

public class MyActivity extends Activity implements View.OnClickListener{
   @Override
   public void onCreate(Bundle savedInstanceState) {
      Button child1 = (Button) findViewById(R.id.child_1);
      child1.setOnClickListener(this);
      Button child2 = (Button) findViewById(R.id.child_2);
      child1.setOnClickListener(this);
  }
}

and then override onClick method

@Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.child_1:
                // do something when child 1 is clicked
              break;
            case R.id.child_2:
                // do something when child 2 is clicked
              break;
        }
}

If you have many buttons then I would suggest a ListView/ RecyclerView and handle the click once based on the position