Android view's getTop(), getLeft(), getX(), getY(), getWidth(), getHeight() methods

Question

I am writing a drag and drop application and got really confused because of some parameters.

Please help to figure out.

First of all, I read the documentation fo

Answer 1

You can get pixels from dp with

float ht_px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, ht, getResources().getDisplayMetrics());
float wt_px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, wt, getResources().getDisplayMetrics());

As of the positioning question. getTop and getLeft are relative values and are based on your parent. Since the only parent of your ImageView is LinearLayout you are effectively positioning your ImageView directly below the ActionBar/ToolBar

Also don't use an image for a circle, you can draw it easily with canvas.drawCircle it takes much less memory.