アクティビティの入力トランジションの一部として使用するカスタムの円形のリビール トランジションを作成しました (具体的には、 を呼び出してウィンドウの入力トランジションとしてトランジションを設定していますWindow#setEnterTransition()
)。
public class CircularRevealTransition extends Visibility {
private final Rect mStartBounds = new Rect();
/**
* Use the view's location as the circular reveal's starting position.
*/
public CircularRevealTransition(View v) {
int[] loc = new int[2];
v.getLocationInWindow(loc);
mStartBounds.set(loc[0], loc[1], loc[0] + v.getWidth(), loc[1] + v.getHeight());
}
@Override
public Animator onAppear(ViewGroup sceneRoot, final View v, TransitionValues startValues, TransitionValues endValues) {
if (endValues == null) {
return null;
}
int halfWidth = v.getWidth() / 2;
int halfHeight = v.getHeight() / 2;
float startX = mStartBounds.left + mStartBounds.width() / 2 - halfWidth;
float startY = mStartBounds.top + mStartBounds.height() / 2 - halfHeight;
float endX = v.getTranslationX();
float endY = v.getTranslationY();
v.setTranslationX(startX);
v.setTranslationY(startY);
// Create a circular reveal animator to play behind a shared
// element during the Activity Transition.
Animator revealAnimator = ViewAnimationUtils.createCircularReveal(v, halfWidth, halfHeight, 0f,
FloatMath.sqrt(halfWidth * halfHeight + halfHeight * halfHeight));
revealAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
// Set the view's visibility to VISIBLE to prevent the
// reveal from "blinking" at the end of the animation.
v.setVisibility(View.VISIBLE);
}
});
// Translate the circular reveal into place as it animates.
PropertyValuesHolder pvhX = PropertyValuesHolder.ofFloat("translationX", startX, endX);
PropertyValuesHolder pvhY = PropertyValuesHolder.ofFloat("translationY", startY, endY);
Animator translationAnimator = ObjectAnimator.ofPropertyValuesHolder(v, pvhX, pvhY);
AnimatorSet anim = new AnimatorSet();
anim.setInterpolator(getInterpolator());
anim.playTogether(revealAnimator, translationAnimator);
return anim;
}
}
これで正常に動作します。ただし、遷移の途中で「戻るボタン」をクリックすると、次の例外が発生します。
Process: com.adp.activity.transitions, PID: 13800
java.lang.UnsupportedOperationException
at android.view.RenderNodeAnimator.pause(RenderNodeAnimator.java:251)
at android.animation.AnimatorSet.pause(AnimatorSet.java:472)
at android.transition.Transition.pause(Transition.java:1671)
at android.transition.TransitionSet.pause(TransitionSet.java:483)
at android.app.ActivityTransitionState.startExitBackTransition(ActivityTransitionState.java:269)
at android.app.Activity.finishAfterTransition(Activity.java:4672)
at com.adp.activity.transitions.DetailsActivity.finishAfterTransition(DetailsActivity.java:167)
at android.app.Activity.onBackPressed(Activity.java:2480)
このエラーが発生する特定の理由はありますか? どのように避けるべきですか?