Click on a specific part of an ImageView - imageview

Question

I would like to be able to touch a specific part of an ImageView and display a toast.
Here is my xml file "dessintest.xml" :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:id="#+id/relative1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
>
<ImageView
android:id="#+id/imageview1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:src="#drawable/dessin1"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
>
</ImageView>
<ImageButton
android:id="#+id/imageButton1"
android:background="#00000000"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:src="#drawable/image" />
</RelativeLayout>
Then here is my main file "DessinTest.java" :
public class DessinTest extends Activity {
ImageButton imageButton;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.dessintest);
addListenerOnButton();
Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.dessin1);
TouchImageView touch = new TouchImageView(this);
touch.setImageBitmap(bm);
touch.setMaxZoom(4f); //change the max level of zoom, default is 3f
setContentView(touch);
}
public void addListenerOnButton() {
imageButton = (ImageButton) findViewById(R.id.imageButton1);
imageButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Toast.makeText(DessinTest.this,"Click !", Toast.LENGTH_SHORT).show();
}
});
}
}
When I try that, I can zoom the ImageView but I cannot see the ImageButton.
When I delete this bit of code (the one for the zooming of my ImageView) :
Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.dessin1);
TouchImageView touch = new TouchImageView(this);
touch.setImageBitmap(bm);
touch.setMaxZoom(4f); //change the max level of zoom, default is 3f
setContentView(touch);
it is working, I can see the ImageButton and click on it.
What I would like is to have both functionnalities, click and zoom.
Thanks !

Answer 1

OK I resolved my problem by using this sample :
https://github.com/chrisbanes/PhotoView/blob/master/sample/src/uk/co/senab/photoview/sample/SimpleSampleActivity.java
I can now zoom and touch/detect specific parts of the screen. It works very well !