当getMultiSelector（）。clearSelections（）被添加到onDestroyActionMode时发生崩溃

Question

我使用recyclerview-mutiselect在我的应用中实现动作模式选择模式。

但是，重写onDestroyActionMode并添加行getMultiSelector（）。clearSelections（）会导致jni崩溃。这是什么原因？它可以修复吗？如果是的话如何？

@Override 
    public void onDestroyActionMode(ActionMode actionMode) { 
     getMultiSelector().clearSelections(); 
     getMultiSelector().setSelectable(false); 
    } 

崩溃：

10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] JNI DETECTED ERROR IN APPLICATION: can't call void android.view.View.setTranslationZ(float) on null object 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65]  in call to CallVoidMethodV 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65]  from void android.animation.PropertyValuesHolder.nCallFloatMethod(java.lang.Object, long, float) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] "main" prio=5 tid=1 Runnable 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] | group="main" sCount=0 dsCount=0 obj=0x86fceef0 self=0xb4d08000 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] | sysTid=26194 nice=0 cgrp=apps sched=0/0 handle=0xb6facec8 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] | state=R schedstat=(2230607509 883371110 3756) utm=160 stm=63 core=3 HZ=100 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] | stack=0xbe02d000-0xbe02f000 stackSize=8MB 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] | held mutexes= "mutator lock"(shared held) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] native: #00 pc 00004c58 /system/lib/libbacktrace_libc++.so (UnwindCurrent::Unwind(unsigned int, ucontext*)+23) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] native: #01 pc 000034c1 /system/lib/libbacktrace_libc++.so (Backtrace::Unwind(unsigned int, ucontext*)+8) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] native: #02 pc 0025898d /system/lib/libart.so (art::DumpNativeStack(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, int, char const*, art::mirror::ArtMethod*)+84) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] native: #03 pc 0023bde3 /system/lib/libart.so (art::Thread::Dump(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) const+162) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] native: #04 pc 000b24e5 /system/lib/libart.so (art::JniAbort(char const*, char const*)+620) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] native: #05 pc 000b2c15 /system/lib/libart.so (art::JniAbortF(char const*, char const*, ...)+68) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] native: #06 pc 000b2f2f /system/lib/libart.so (art::ScopedCheck::CheckVirtualMethod(_jobject*, _jmethodID*)+438) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] native: #07 pc 000be29b /system/lib/libart.so (art::CheckJNI::CallVoidMethodV(_JNIEnv*, _jobject*, _jmethodID*, std::__va_list)+82) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] native: #08 pc 00067897 /system/lib/libandroid_runtime.so (???) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] native: #09 pc 00071ff5 /system/framework/arm/boot.oat (Java_android_animation_PropertyValuesHolder_nCallFloatMethod__Ljava_lang_Object_2JF+132) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.animation.PropertyValuesHolder.nCallFloatMethod(Native method) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.animation.PropertyValuesHolder.access$400(PropertyValuesHolder.java:38) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.animation.PropertyValuesHolder$FloatPropertyValuesHolder.setAnimatedValue(PropertyValuesHolder.java:1296) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.animation.ObjectAnimator.animateValue(ObjectAnimator.java:952) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.animation.ValueAnimator.animationFrame(ValueAnimator.java:1207) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.animation.ValueAnimator.doAnimationFrame(ValueAnimator.java:1248) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.animation.ValueAnimator$AnimationHandler.doAnimationFrame(ValueAnimator.java:659) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.animation.ValueAnimator$AnimationHandler.run(ValueAnimator.java:682) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.view.Choreographer$CallbackRecord.run(Choreographer.java:777) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.view.Choreographer.doCallbacks(Choreographer.java:590) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.view.Choreographer.doFrame(Choreographer.java:559) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:763) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.os.Handler.handleCallback(Handler.java:739) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.os.Handler.dispatchMessage(Handler.java:95) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.os.Looper.loop(Looper.java:145) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at android.app.ActivityThread.main(ActivityThread.java:5944) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at java.lang.reflect.Method.invoke!(Native method) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at java.lang.reflect.Method.invoke(Method.java:372) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1389) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1184) 
10-23 01:38:05.291 26194-26194/com.vibhinna.avidd A/art: sart/runtime/check_jni.cc:65] 

Answer 1

好像错误是在onDestroyActionMode默认实现。在MultiSelector变得不可选择之前，持有者应该被取消激活。此解决办法为我工作：

@Override 
public boolean onActionItemClicked(ActionMode actionMode, MenuItem menuItem) { 
    if (menuItem.getItemId()== R.id.action_delete){ 

     deleteItems(mMultiSelector.getSelectedPositions()); 

     // finish actionMode after you've handled selected positions 
     // don't clear selections here - they will be cleared in onDestroyActionMode 
     actionMode.finish(); 
     return true; 
    } 
    return false; 
} 

@Override 
public void onDestroyActionMode(ActionMode actionMode) { 
    // don't call super here - leads to crash! 
    // clear selections 
    mMultiSelector.clearSelections(); 
    // here we need to change the mIsSelectable property without refreshing all the holders, 
    // so we cant use mMultiSelector.setSelectable(false) 
    try { 
     Field field = mMultiSelector.getClass().getDeclaredField("mIsSelectable"); 
     if (field != null) { 
      if (!field.isAccessible()) 
       field.setAccessible(true); 
      field.set(mMultiSelector, false); 
     } 
    } catch (IllegalAccessException e) { 
     e.printStackTrace(); 
    } catch (NoSuchFieldException e) { 
     e.printStackTrace(); 
    } 
} 

感谢valeriia-shchukina@github。