ImageView Drag Limitation In Android

Question

I have an ImageView in a layout and set OnTouchListener on ImageView to drag the ImageView. It\'s working perfectly. My problem is how can I prevent from move ImageView to out o

Answer 1

Android documentation says:

It is possible to retrieve the location of a view by invoking the methods getLeft() and getTop(). The former returns the left, or X, coordinate of the rectangle representing the view. The latter returns the top, or Y, coordinate of the rectangle representing the view. These methods both return the location of the view relative to its parent.
In addition, several convenience methods are offered to avoid unnecessary computations, namely getRight() and getBottom(). These methods return the coordinates of the right and bottom edges of the rectangle representing the view. For instance, calling getRight() is similar to the following computation: getLeft() + getWidth().

So you can get your image coordinates before moving it,and you can compute measure of movement in your OnTouchListener class.Now if (X coordinate of your image plus horizontal movement that you computed,be greater than device width or Y coordinate of your image plus vertical movement that you computed,be greater than device height) your image not move.