Screenshot effect Android

Question

i want to create an screen efect like when you take an screenshot in the phone, i mean, a little flash in the screen when i click a button, also i want to change the color of that flash. Is that posible? thank you very much in advance ;)

Answer 1

An easy way to get this effect would be to have the following:

Create an empty 'panel' over your layout. For example:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <LinearLayout
        android:layout_height="wrap_content"
        android:layout_width="fill_parent">
        <!-- Your normal layout in here, doesn't have to be a LinearLayout -->
    </LinearLayout>
    <FrameLayout
        android:id="@+id/pnlFlash"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="[Set to your desired flash colour, image, etc]"
        android:visibility="gone"
        />
</FrameLayout>

The FrameLayout with the id 'pnlFlash' remains hidden away so it won't interfere with normal interaction.

Now when you want to make a flash all you have to do is make the panel appear for as long as is appropriate. having a nice fade off always helps too.

pnlFlash.setVisibility(View.VISIBLE);

AlphaAnimation fade = new AlphaAnimation(1, 0);
fade.setDuration(50);
fade.setAnimationListener(new AnimationListener() {
    ...
    @Override
    public void onAnimationEnd(Animation anim) {
        pnlFlash.setVisibility(View.GONE);
    }
    ...
});
pnlFlash.startAnimation(fade);

I haven't used this kind of code before for a flash so you might want to tweak the duration accordingly.