Place view inside FrameLayout in Android

Question

I want to add a view inside a FrameLayout programmatically and to place it in a specific point within the layout with a specific width and height. Does FrameLayout support this? If not, should I use an intermediate ViewGroup to achieve this?

int x; // Can be negative?
int y; // Can be negative?
int width;
int height;
View v = new View(context);
// v.setLayoutParams(?); // What do I put here?
frameLayout.addView(v);

My initial idea was to add an AbsoluteLayout to the FrameLayout and place the view inside the AbsoluteLayout. Unfortunately I just found out that AbsoluteLayout is deprecated.

Any pointers will be much appreciated. Thanks.

Answer 1

You can also add a margin around the newly added view to position it inside the FrameLayout.

FrameLayout frameLayout = (FrameLayout) findViewById(R.id.main); // or some other R.id.xxx
DisplayMetrics metrics = context.getResources().getDisplayMetrics();
LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.setMargins(0, metrics.heightPixels - 20, 0, 0);
View v = new View(context);
v.setLayoutParams(params);
frameLayout.addView(v);

This will position the FrameLayout 20 pixels from the bottom of the screen.

Edit: completed the example so it stands by itself. And oh, yes it does work.

Answer 2

The following example (working code) shows how to place a view (EditText) inside of a FrameLayout. Also it shows how to set the position of the EditText using the setPadding setter of the FrameLayout (everytime the user clicks on the FrameLayout, the position of the EditText is set to the position of the click):

public class TextToolTestActivity extends Activity{
    FrameLayout frmLayout;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        frmLayout = (FrameLayout)findViewById(R.id.frameLayout1);
        frmLayout.setFocusable(true);
        EditText et = new EditText(this);

        frmLayout.addView(et,100,100);
        frmLayout.setOnTouchListener(new OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                Log.i("TESTING","touch x,y == " + event.getX() + "," +     event.getY() );
                frmLayout.setPadding(Math.round(event.getX()),Math.round(event.getY()) , 0, 0);
            return true;
        }
    });

}

}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <FrameLayout 
        android:id="@+id/frameLayout1" 
        android:layout_height="fill_parent" android:layout_width="fill_parent">
    </FrameLayout>

</LinearLayout>