public class OnboardingWithCenterAnimationActivity extends AppCompatActivity {
public static final int STARTUP_DELAY = 300;
public static final int ANIM_ITEM_DURATION = 1000;
public static final int ITEM_DELAY = 300;
private boolean animationStarted = false;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
setTheme(R.style.AppTheme);
getWindow().getDecorView().setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_onboarding_center);
}
@Override
public void onWindowFocusChanged(boolean hasFocus) {
if (!hasFocus || animationStarted) {
return;
}
animate();
super.onWindowFocusChanged(hasFocus);
}
private void animate() {
ImageView logoImageView = (ImageView) findViewById(R.id.img_logo);
ViewGroup container = (ViewGroup) findViewById(R.id.container);
ViewCompat.animate(logoImageView)
.translationY(-250)
.setStartDelay(STARTUP_DELAY)
.setDuration(ANIM_ITEM_DURATION).setInterpolator(
new DecelerateInterpolator(1.2f)).start();
for (int i = 0; i < container.getChildCount(); i++) {
View v = container.getChildAt(i);
ViewPropertyAnimatorCompat viewAnimator;
if (!(v instanceof Button)) {
viewAnimator = ViewCompat.animate(v)
.translationY(50).alpha(1)
.setStartDelay((ITEM_DELAY * i) + 500)
.setDuration(1000);
} else {
viewAnimator = ViewCompat.animate(v)
.scaleY(1).scaleX(1)
.setStartDelay((ITEM_DELAY * i) + 500)
.setDuration(500);
}
viewAnimator.setInterpolator(new DecelerateInterpolator()).start();
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="android:windowBackground">@null</item>
</style>
<style name="AppTheme.CenterAnimation">
<item name="android:windowBackground">@drawable/ll_face_logo</item>
</style>