Question

我正在使用ActivityOptions.makeSceneTransitionAnimation API来处理共享转换。

我面临的问题是它适用于Marshmellow设备但在Lolipop设备上崩溃。

这是崩溃日志：

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.ViewGroup.getScrollX()' on a null object reference
   at android.app.ActivityTransitionCoordinator.setSharedElementState(ActivityTransitionCoordinator.java:435)
   at android.app.ActivityTransitionCoordinator.setSharedElementState(ActivityTransitionCoordinator.java:473)
   at android.app.EnterTransitionCoordinator.startSharedElementTransition(EnterTransitionCoordinator.java:332)
   at android.app.EnterTransitionCoordinator.access$200(EnterTransitionCoordinator.java:42)
   at android.app.EnterTransitionCoordinator$5$1.run(EnterTransitionCoordinator.java:389)
   at android.app.ActivityTransitionCoordinator.startTransition(ActivityTransitionCoordinator.java:698)
   at android.app.EnterTransitionCoordinator$5.onPreDraw(EnterTransitionCoordinator.java:386)
   at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:847)
   at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1990)
   at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1088)
   at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5825)
   at android.view.Choreographer$CallbackRecord.run(Choreographer.java:769)
   at android.view.Choreographer.doCallbacks(Choreographer.java:582)
   at android.view.Choreographer.doFrame(Choreographer.java:552)
   at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:755)
   at android.os.Handler.handleCallback(Handler.java:739)
   at android.os.Handler.dispatchMessage(Handler.java:95)
   at android.os.Looper.loop(Looper.java:135)
   at android.app.ActivityThread.main(ActivityThread.java:5237)
   at java.lang.reflect.Method.invoke(Method.java)
   at java.lang.reflect.Method.invoke(Method.java:372)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:707)

这是我的代码

 @Override
public void getComments(String postId, String authorName, String message, String imageURL, String likesCount, RelativeLayout imageView) {


    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP && imageView != null) {
        ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(getActivity(), imageView, "revealLayout");

        Intent commentIntent = new Intent(getActivity(), CommentsActivity.class);
        commentIntent.putExtra("postId", postId);
        commentIntent.putExtra("authorName", authorName);
        commentIntent.putExtra("message", message);
        commentIntent.putExtra("imageURL", imageURL);
        commentIntent.putExtra("likesCount", likesCount);
        startActivity(commentIntent, options.toBundle());

    } else {
        Intent commentIntent = new Intent(getActivity(), CommentsActivity.class);
        commentIntent.putExtra("postId", postId);
        commentIntent.putExtra("authorName", authorName);
        commentIntent.putExtra("message", message);
        commentIntent.putExtra("imageURL", imageURL);
        commentIntent.putExtra("likesCount", likesCount);
        startActivity(commentIntent);
    }


}

我通过接口

从适配器回调中获取上述数据

我的XML：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/root_layout"
  android:layout_width="match_parent"
  android:transitionName="revealLayout"
  android:layout_height="wrap_content"
  android:background="?android:attr/selectableItemBackground"
  android:orientation="vertical">

接收端与android:transitionName相同的相对布局

这是我的styles.xml

  <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">#c65643</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="android:windowContentTransitions">true</item>
    <item name="android:windowSharedElementReenterTransition">@null</item>
    <item name="android:windowReenterTransition">@null</item>
    <item name="android:windowAllowReturnTransitionOverlap">false</item>
</style>

styles.xml（21）

  <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
            <!-- Customize your theme here. -->
            <item name="colorPrimary">@color/colorPrimary</item>
            <item name="colorPrimaryDark">#c65643</item>
            <item name="colorAccent">@color/colorAccent</item>
            <item name="android:windowContentTransitions">true</item>
            <item name="android:windowSharedElementReenterTransition">@null</item>
            <item name="android:windowReenterTransition">@null</item>
            <item name="android:windowAllowReturnTransitionOverlap">false</item>

    </style>

也通过此链接https://code.google.com/p/android/issues/detail?id=224270&sort=-id&colspec=ID但没有运气

提前致谢

Answer 1

很明显，这是5.0中的Android Bug，并已在5.1中修复。 尝试将除ScaleType.MATRIX以外的其他ScaleType设置为Transition ImageView。

Android 5.0上的
537 protected ArrayList<View> createSnapshots(Bundle state, Collection<String> names) { 538 ... 549 for (String name: names) { 550 Bundle sharedElementBundle = state.getBundle(name); 551 if (sharedElementBundle != null) { 552 ... 557 if (snapshot != null) { 558 setSharedElementState(snapshot, name, state, null, null, decorLoc); 559 } 560 snapshots.add(snapshot); 561 } 562 } 563 return snapshots; 564 }

Android 5.1上的
629 protected ArrayList<View> createSnapshots(Bundle state, Collection<String> names) { 630 ... 641 Matrix tempMatrix = new Matrix(); 642 for (String name: names) { 643 Bundle sharedElementBundle = state.getBundle(name); 644 View snapshot = null; 645 if (sharedElementBundle != null) { 646 ... 650 if (snapshot != null) { 651 setSharedElementState(snapshot, name, state, tempMatrix, null, decorLoc); 652 } 653 } 655 snapshots.add(snapshot); 656 } 657 return snapshots; 658 }

以及ActivityTransitionCoordinator.setSharedElementState中的崩溃行

376 private void setSharedElementState(View view, String name, Bundle transitionArgs, 377 Matrix tempMatrix, RectF tempRect, int[] decorLoc) { 378 Bundle sharedElementBundle = transitionArgs.getBundle(name); 379 if (sharedElementBundle == null) { 380 return; 381 } 382 383 if (view instanceof ImageView) { 384 int scaleTypeInt = sharedElementBundle.getInt(KEY_SCALE_TYPE, -1); 385 if (scaleTypeInt >= 0) { 386 ImageView imageView = (ImageView) view; 387 ImageView.ScaleType scaleType = SCALE_TYPE_VALUES[scaleTypeInt]; 388 imageView.setScaleType(scaleType); 389 if (scaleType == ImageView.ScaleType.MATRIX) { 390 float[] matrixValues = sharedElementBundle.getFloatArray(KEY_IMAGE_MATRIX); 391 tempMatrix.setValues(matrixValues); 392 imageView.setImageMatrix(tempMatrix); 393 } 394 } 395 } 396 ... 450 }

棒棒糖设备的共享元素转换崩溃

1 个答案: