How to detect if using touches and drags out of button region

Hey,

I’m going to explain how to detect and change a TextView’s color when touches and drags out its region.

This little code segment will save your day!

 next_button.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                switch (event.getAction()) {
                    case MotionEvent.ACTION_DOWN:
                        next_button.setTextColor(getResources().getColor(R.color.myGreyMaterial));
                        rect = new Rect(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());
                        return true;
                    case MotionEvent.ACTION_UP:
                        if (rect != null
                                && !rect.contains(v.getLeft() + (int) event.getX(),
                                v.getTop() + (int) event.getY())) {
                            // The motion event was outside of the view, handle this as a non-click event
                            next_button.setTextColor(getResources().getColor(R.color.colorPrimary));
                            return true;
                        }
                        // The view was clicked.
                        next_button.setTextColor(getResources().getColor(R.color.colorPrimary));
                        startActivity(new Intent(getApplicationContext(),RegisterActivity.class));
                        return true;
                }
                return false;
            }
        });



First you need to initialize a Recy object;
private Rect rect;

In the MotionEvent.ACTION_DOWN part, you need to calculate rect
rect = new Rect(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());

It will get the region’s where the region is.

Then, in the MotionEvent.ACTION_UP part, you need to check that touches is in region or not;
if (rect != null
        && !rect.contains(v.getLeft() + (int) event.getX(),
        v.getTop() + (int) event.getY()))

Then, ta-daa :) You can use that touch detection :)

If you have any question, ask me :)