android - 无法在空对象上调用 void android.view.View.setTranslationZ(float)

Question

我在我的项目中使用库 recyclerview-multiselect 来选择 recyclerview 上的多个项目在三星设备上:当我长按并选择一个项目时，多选器启动，但是一旦我取消选择最后一个选定的项目，我就会出现以下异常这仅发生在三星设备上

JNI DETECTED ERROR IN APPLICATION: can't call void android.view.View.setTranslationZ(float) on null object
in call to CallVoidMethodV
from void android.animation.PropertyValuesHolder.nCallFloatMethod(java.lang.Object, long, float)
"main" prio=5 tid=1 Runnable
| group="main" sCount=0 dsCount=0 obj=0x86d99ef0 self=0xb4d07800
| sysTid=28321 nice=0 cgrp=apps sched=0/0 handle=0xb6f9dec8
| state=R schedstat=( 1263638622 186444747 1521 ) utm=90 stm=36 core=1 HZ=100
| stack=0xbe20a000-0xbe20c000 stackSize=8MB
| held mutexes= "mutator lock"(shared held)
native: #00 pc 00004c58  /system/lib/libbacktrace_libc++.so (UnwindCurrent::Unwind(unsigned int, ucontext*)+23)
native: #01 pc 000034c1  /system/lib/libbacktrace_libc++.so (Backtrace::Unwind(unsigned int, ucontext*)+8)
native: #02 pc 002590fd  /system/lib/libart.so (art::DumpNativeStack(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, int, char const*, art::mirror::ArtMethod*)+84)
native: #03 pc 0023c5c3  /system/lib/libart.so (art::Thread::Dump(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) const+162)
native: #04 pc 000b2655  /system/lib/libart.so (art::JniAbort(char const*, char const*)+620)
native: #05 pc 000b2d85  /system/lib/libart.so (art::JniAbortF(char const*, char const*, ...)+68)
native: #06 pc 000b309f  /system/lib/libart.so (art::ScopedCheck::CheckVirtualMethod(_jobject*, _jmethodID*)+438)
native: #07 pc 000be40b  /system/lib/libart.so (art::CheckJNI::CallVoidMethodV(_JNIEnv*, _jobject*, _jmethodID*, std::__va_list)+82)
native: #08 pc 00068467  /system/lib/libandroid_runtime.so (???)
native: #09 pc 00072005  /system/framework/arm/boot.oat (Java_android_animation_PropertyValuesHolder_nCallFloatMethod__Ljava_lang_Object_2JF+132)
at android.animation.PropertyValuesHolder.nCallFloatMethod(Native method)
at android.animation.PropertyValuesHolder.access$400(PropertyValuesHolder.java:38)
at android.animation.PropertyValuesHolder$FloatPropertyValuesHolder.setAnimatedValue(PropertyValuesHolder.java:1296)
at android.animation.ObjectAnimator.animateValue(ObjectAnimator.java:952)
at android.animation.ValueAnimator.animationFrame(ValueAnimator.java:1207)
at android.animation.ValueAnimator.doAnimationFrame(ValueAnimator.java:1248)
at android.animation.ValueAnimator$AnimationHandler.doAnimationFrame(ValueAnimator.java:659)
at android.animation.ValueAnimator$AnimationHandler.run(ValueAnimator.java:682)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:777)
at android.view.Choreographer.doCallbacks(Choreographer.java:590)
at android.view.Choreographer.doFrame(Choreographer.java:559)

Answer 1

当我使用 recycleview-multiselect 时，它在 SwappingHolder 中设置了 setSelectionModeStateListAnimator、setDefaultModeStateListAnimator、setSelectionModeBackgroundDrawable、setDefaultModeBackgroundDrawable因此，在我对 holder 的 super 调用刚刚设置之后:

    if ( Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        setSelectionModeStateListAnimator(null);
        setDefaultModeStateListAnimator(null);
    }
    // Default selection mode background drawable is this
    setSelectionModeBackgroundDrawable(null);
    setDefaultModeBackgroundDrawable( null );

并在 xml 中使用了我自己的选择器，这解决了崩溃问题。