I want to extend View from a Activity class

Question

Currently I have a class called MapActivity that extends AppCompatActivity, and I need this because I have a acitivity_map.xml, but the thing is, I want to extend View, so that I can draw things on this activity.

How can I achive this ?

Don't draw on the activity itself. Draw on one of its elements instead — Tim, Oct 05 '15 at 14:24
Agreed. Create a separate `View` class that is your drawing surface, and add it to your activity. — CommonsWare, Oct 05 '15 at 14:27
How do I add that to my activity ? Currently I have a seperate View Class But I dont see how I can add it to my activity ? — Jozo, Oct 05 '15 at 14:28
This way, I cant see my buttons.. it like takes over the whole activity — Jozo, Oct 05 '15 at 14:33

score 2 · Accepted Answer · answered Oct 05 '15 at 14:34

Recently i had the same question. Here is what i got: Create your own view:

public class CustomView extends View

Override the onDraw() method like this:

 @Override
    public void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.save();
        //draw something
        canvas.restore();
 }

In your Activity in onCreate:

setContentView(R.layout.activity_name);
    com.XXX.XXX.CustomView cV = (com.XXX.XXX.CustomView) findViewById(R.id.customView);

And in the xml:

<com.XXX.XXX.CustomView
        android:id="@+id/customView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

This answer could be useful, if you're looking for this issue http://stackoverflow.com/questions/3739661/error-inflating-when-extending-a-class — Mitro, Apr 11 '17 at 17:16

I want to extend View from a Activity class

1 Answers1