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javaandroidimagebuttonfadeout

android – show a button for a limited time

I am making an app where an ImageButton is shown and fades until it disappears if the user doesn't touch it for too long.
I tried many different solutions (animation, wait(), etc.) but nothing did what I tried to...
It should work like a Toast, just show up for 3 seconds and then fade out (in the end of the process the visibility should be GONE.

Solution

  • Use a timer and alpha

    long duration = 5000 // 5 seconds
long tick = 100 // 0.1 seconds;

new CountDownTimer(duration, tick) {

     public void onTick(long millisUntilFinished) {
         mImageButton.setAlpha(millisUntilFinished / (float)duration)
     }

     public void onFinish() {
         mImageButton.setVisibility(View.GONE);
         mImageButton.setAlpha(1); // incase you want to show the button again
     }
}.start();

    setAlpha() - Sets the opacity of the view. This is a value from 0 to 1, where 0 means the view is completely transparent and 1 means the view is completely opaque.