Android - move an ImageView on screen (Like dragging)

Question

I\'m trying to create an app that can move an ImageView on your device like dragging and when I put like 75% of the ImageView out of the screen show a

Answer 1

You can achieve this via this code.

DisplayMetrics metrics = getResources().getDisplayMetrics();
int windowWidth = metrics.widthPixels;
int windowHeight = metrics.heightPixels;

Now in your onTouch method, calculate if the target location exceeds the above dimensions.

if( currentXLocation + deltaX > windowWidth ){

// this will ensure that target location 
// is always <= windowHeight
deltaX = windowWidth - currentXLocation; 

} else if( currentXLocation + deltaX < 0){

deltaX = -(currentXLocation);

} else if (...){

// perform similar calculations for the rest 

}