FragmentTransaction.setCustomAnimations（）时，电池保护程序是

Question

我使用自定义动画（从左至右滑动）的片段之间的过渡不起作用。但是当调用FragmentTransaction.commit（）后，电池保护程序处于打开状态时，第二个片段不会显示。

FragmentTransaction ft = getFragmentManager().beginTransaction(); 

    ft.setCustomAnimations(R.anim.slide_in_left, R.anim.slide_out_right); 
    ft.replace(R.id.fragment_help_container, newFragment); 
    // Start the animated transition. 
    ft.commit(); 

这是我在logcat中找到与此相关的问题。

02-18 20:33:26.908 932-932/? E/Icon: Unable to load resource 0x00000000 from pkg= 
      android.content.res.Resources$NotFoundException: Resource ID #0x0 
      at android.content.res.Resources.getValue(Resources.java:1351) 
      at android.content.res.Resources.getDrawable(Resources.java:804) 
      at android.graphics.drawable.Icon.loadDrawableInner(Icon.java:313) 
      at android.graphics.drawable.Icon.loadDrawable(Icon.java:269) 
      at android.widget.RemoteViews$TextViewDrawableAction.apply(RemoteViews.java:1502) 
      at android.widget.RemoteViews.performApply(RemoteViews.java:2804) 
      at android.widget.RemoteViews.apply(RemoteViews.java:2764) 
      at android.widget.RemoteViews$ViewGroupAction.apply(RemoteViews.java:1373) 
      at android.widget.RemoteViews.performApply(RemoteViews.java:2804) 
      at android.widget.RemoteViews.reapply(RemoteViews.java:2795) 
      at com.android.systemui.statusbar.BaseStatusBar.updateNotificationViews(BaseStatusBar.java:2064) 
      at com.android.systemui.statusbar.BaseStatusBar.updateNotification(BaseStatusBar.java:1939) 
      at com.android.systemui.statusbar.BaseStatusBar$6$2.run(BaseStatusBar.java:487) 
      at android.os.Handler.handleCallback(Handler.java:739) 
      at android.os.Handler.dispatchMessage(Handler.java:95) 
      at android.os.Looper.loop(Looper.java:148) 
      at android.app.ActivityThread.main(ActivityThread.java:5417) 
      at java.lang.reflect.Method.invoke(Native Method) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

slide_in_left.xml

<set xmlns:android="http://schemas.android.com/apk/res/android" > 

<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android" 
    android:interpolator="@android:anim/linear_interpolator" 
    android:valueFrom="1.0" 
    android:valueTo="0" 
    android:propertyName="xFraction" 
    android:duration="@android:integer/config_mediumAnimTime" /> 

</set> 

slide_out_right.xml

<set xmlns:android="http://schemas.android.com/apk/res/android" > 

<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android" 
    android:interpolator="@android:anim/linear_interpolator" 
    android:valueFrom="0" 
    android:valueTo="-1.0" 
    android:propertyName="xFraction" 
    android:duration="@android:integer/config_mediumAnimTime" /> 

</set> 

Answer 1

卸下集似乎在大多数情况下为我工作。当设备处于电池模式时，objectAnimator似乎表现得像一个noOp，所以你不会有很好的动画，但是你不必担心任何复杂的问题。如果您需要更复杂的动画需要该集合（例如同时进行淡入淡出和翻译），则可能需要添加辅助方法来设置自定义动画。在我的情况下，我实际上有视图，应该动画，因为该集只是没有出现

/** 
* NOTE: on lollipop+ the battery save screws with the animations. in most cases its fine but in some it actually prevents 
* the fragment from displaying. because of that I am creating this helper that must always be used 
*/ 
public static void setCustomAnimation(Activity activity, FragmentTransaction transaction, int enter, int exit, int popEnter, int popExit) 
{ 
    PowerManager powerManager = (PowerManager) activity.getSystemService(Context.POWER_SERVICE); 
    if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP 
      && powerManager.isPowerSaveMode()) 
    { 
     return; 
    } 
    transaction.setCustomAnimations(enter, exit, enter, exit); 
}