Send touch event using OverlayView

Question

I'm deploying an app which create a cursor using a OverlayView. I'm able to move it around the screen and outside my app (service).

But now I want to implement the touch event. I'm running the cursor in a service, so I can still move it in the menu or anywhere. But I don't know how to make a click.

So once I'm outside my app if this service gets a click event (programmatically or remotely), I want to make a touch event on the view under my cursor.

Any idea how to get the view under it or how to send a system touch event?

This is how I control and draw the cursor:

class OverlayView extends ViewGroup {
private Paint mLoadPaint;
boolean mShowCursor;

Bitmap  cursor;
public int x = 0,y = 0;

public void Update(int nx, int ny) {
    x = nx; y = ny;
}
public void ShowCursor(boolean status) {
    mShowCursor = status;
}
public boolean isCursorShown() {
    return mShowCursor;
}

public OverlayView(Context context) {
    super(context);
    cursor = BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_launcher);
    mLoadPaint = new Paint();
    mLoadPaint.setAntiAlias(true);
    mLoadPaint.setTextSize(10);
    mLoadPaint.setARGB(255, 255, 0, 0);
}


@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    //canvas.drawText("Hello World", 0, 0, mLoadPaint);
    if (mShowCursor) canvas.drawBitmap(cursor,x,y,null);
}

@Override
protected void onLayout(boolean arg0, int arg1, int arg2, int arg3, int arg4) {
}

@Override
public boolean onTouchEvent(MotionEvent event) {
    return true;
}

Thank you

Answer 1

The normal way to do that is using Instrumentation.sendPointerSync(motionEvent); which use the permission :

<uses-permission android:name="android.permission.INJECT_EVENTS">
</uses-permission>

But ... to receive the INJECT_EVENTS permission your app must be signed by the same signature that the system is signed with. (The platform key of the device where the app is running ...) Ex: if you want to run your app on a samsung device, you have to sign your app with the samsung secret key ... Only the constructor can do that... (sry)

In conclusion, your application can inject events only inside itself. (otherwise it would be a security nightmare, imagine an apk which allow an user to control your phone ...)

Edit : If you have the key (for exemple if you build your own device, own ROM) you should sign the apk with the signapk.jar (a tool included with the Android platform source bundle) :

java -jar signapk.jar certificate.pem key.pk8 your-app.apk your-signed-app.apk