Q:

How to implement the android zoomview?

I want to implement the android-zoom-view (https://code.google.com/p/android-zoom-view/).
I added the jar to the buildpath. I created the following xml: 
<?xml version="1.0" encoding="utf-8"?>
<pl.polidea.view.ZoomView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

     <ImageView
        android:id="@+id/webcam1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:layout_marginBottom="20dp"
        android:scaleType="matrix" />

    <ImageView
        android:id="@+id/webcam2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:scaleType="matrix" />
</pl.polidea.view.ZoomView>

and added the following code to my activity:
    View v = ((LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE))
            .inflate(R.layout.zoomable_view, null, false);
    v.setLayoutParams(new LinearLayout.LayoutParams(
            LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

    zoomView = new ZoomView(this);
    zoomView.addView(v);

    LinearLayout main_container = (LinearLayout) findViewById(R.id.LinearLayout1);
    main_container.addView(zoomView);

what am I doing wrong?
I get the following error:
Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class pl.polidea.view.ZoomView

A:

I added the following constructor to the ZoomView class and it works now at least for one imageview in the zoomview.
public ZoomView(final Context context, AttributeSet attr) {
     super(context, attr);     
}

