Janmejoy Janmejoy - 3 months ago 35
Android Question

Draw Bitmap in Custom ImageView and get the Co-ordinates of the ImageView irrespective of the device

I want to get the co-ordinates of the

ImageView
, Irrespective of device size.

Is there any possible way !!

I have tried to create specific size for the
ImageView
,Even specific size for the
Parent View
also ,but its not working.

I have tried the following possible ways.

int[] posXY = new int[2];
imageview.getLocationOnScreen(posXY);
int MoveX = posXY[0];
int MoveY = posXY[1];


I have tried with Matrix too ,But not working.

Matrix m = imageview.getImageMatrix();


Tried the below code, but it is also not working.!!

I need to get the same {x,y} Co-ordinates for all devices for the same point (Location).

final float[] getPointerCoords(ImageView view, MotionEvent e)
{
final int index = e.getActionIndex();
final float[] coords = new float[] {
e.getX(index), e.getY(index)
};
Matrix matrix = new Matrix();
view.getImageMatrix().invert(matrix);

matrix.mapPoints(coords);

return coords;
}


Here is draw Method :

if i set bitmap image in draw, it does not fit the screen for every devices. If i set image with Display width and height, i am getting different co-ordinates.

@Override
public void draw(Canvas canvas) {
// TODO Auto-generated method stub
super.draw(canvas);

Resources res = getResources();
Drawable drawable = res.getDrawable(R.drawable.subimage);
mBitmap = ((BitmapDrawable) drawable).getBitmap();
canvas.drawBitmap(mBitmap, 0, 0, null);

}


Any Idea or help would be really helpful.

Answer

Finally found some relative solution,Same Co-ordinates for all devices.Using Activity,no Custom ImageView.

On ImageView OnTouch ..

 public boolean onTouch(View v, MotionEvent event) {
    int action = event.getAction();
      final int index = e.getActionIndex();
      final float[] coords = new float[] {
              e.getX(index), e.getY(index)
      };
      Matrix matrix = new Matrix();
      choosenImageView.getImageMatrix().invert(matrix);
      matrix.mapPoints(coords);
    return true;
  }

Draw Using Canvas

        Resources res = getResources();
        Drawable drawable = res.getDrawable(R.drawable.image);

        Bitmap bmp= ((BitmapDrawable) drawable).getBitmap();

        alteredBitmap = Bitmap.createBitmap(bmp.getWidth(), bmp.getHeight(), bmp.getConfig());
        canvas = new Canvas(alteredBitmap);
        paint = new Paint();
        paint.setColor(Color.GREEN);
        paint.setStrokeWidth(5);
        matrix = new Matrix();
        canvas.drawBitmap(bmp, matrix, paint);
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