I am using library lapism/SearchView (https://github.com/lapism/SearchView) in my project but I get following runtime exception only on Android 5.0:
A/art: art/runtime/check_jni.cc:65] JNI DETECTED ERROR IN APPLICATION: can't call void android.view.View.setElevation(float) on null object
A/art: art/runtime/check_jni.cc:65] in call to CallVoidMethodV
A/art: art/runtime/check_jni.cc:65] from void android.animation.PropertyValuesHolder.nCallFloatMethod(java.lang.Object, long, float)
A/art: art/runtime/check_jni.cc:65] "main" prio=5 tid=1 Runnable
A/art: art/runtime/check_jni.cc:65] | group="main" sCount=0 dsCount=0 obj=0x757838b0 self=0xb8994958
A/art: art/runtime/check_jni.cc:65] | sysTid=28467 nice=0 cgrp=apps sched=0/0 handle=0xb6f80058
A/art: art/runtime/check_jni.cc:65] | state=R schedstat=( 0 0 0 ) utm=27 stm=10 core=1 HZ=100
A/art: art/runtime/check_jni.cc:65] | stack=0xbe01e000-0xbe020000 stackSize=8MB
A/art: art/runtime/check_jni.cc:65] | held mutexes= "mutator lock"(shared held)
A/art: art/runtime/check_jni.cc:65] native: #00 pc 00004828 /system/lib/libbacktrace_libc++.so (UnwindCurrent::Unwind(unsigned int, ucontext*)+23)
A/art: art/runtime/check_jni.cc:65] native: #01 pc 00002ec5 /system/lib/libbacktrace_libc++.so (Backtrace::Unwind(unsigned int, ucontext*)+8)
A/art: art/runtime/check_jni.cc:65] native: #02 pc 0024437d /system/lib/libart.so (art::DumpNativeStack(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, int, char const*, art::mirror::ArtMethod*)+68)
A/art: art/runtime/check_jni.cc:65] native: #03 pc 0022774b /system/lib/libart.so (art::Thread::DumpStack(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) const+394)
A/art: art/runtime/check_jni.cc:65] native: #04 pc 000af2db /system/lib/libart.so (art::JniAbort(char const*, char const*)+582)
A/art: art/runtime/check_jni.cc:65] native: #05 pc 000afa21 /system/lib/libart.so (art::JniAbortF(char const*, char const*, ...)+60)
A/art: art/runtime/check_jni.cc:65] native: #06 pc 000b0613 /system/lib/libart.so (art::ScopedCheck::CheckVirtualMethod(_jobject*, _jmethodID*)+402)
A/art: art/runtime/check_jni.cc:65] native: #07 pc 000ba087 /system/lib/libart.so (art::CheckJNI::CallVoidMethodV(_JNIEnv*, _jobject*, _jmethodID*, std::__va_list)+70)
A/art: art/runtime/check_jni.cc:65] native: #08 pc 0006028f /system/lib/libandroid_runtime.so (???)
A/art: art/runtime/check_jni.cc:65] native: #09 pc 000721e5 /data/dalvik-cache/arm/system@framework@boot.oat (Java_android_animation_PropertyValuesHolder_nCallFloatMethod__Ljava_lang_Object_2JF+132)
A/art: art/runtime/check_jni.cc:65] at android.animation.PropertyValuesHolder.nCallFloatMethod(Native method)
A/art: art/runtime/check_jni.cc:65] at android.animation.PropertyValuesHolder.access$400(PropertyValuesHolder.java:38)
A/art: art/runtime/check_jni.cc:65] at android.animation.PropertyValuesHolder$FloatPropertyValuesHolder.setAnimatedValue(PropertyValuesHolder.java:1296)
A/art: art/runtime/check_jni.cc:65] at android.animation.ObjectAnimator.animateValue(ObjectAnimator.java:952)
A/art: art/runtime/check_jni.cc:65] at android.animation.ValueAnimator.animationFrame(ValueAnimator.java:1207)
A/art: art/runtime/check_jni.cc:65] at android.animation.ValueAnimator.doAnimationFrame(ValueAnimator.java:1248)
A/art: art/runtime/check_jni.cc:65] at android.animation.ValueAnimator$AnimationHandler.doAnimationFrame(ValueAnimator.java:659)
A/art: art/runtime/check_jni.cc:65] at android.animation.ValueAnimator$AnimationHandler.run(ValueAnimator.java:682)
A/art: art/runtime/check_jni.cc:65] at android.view.Choreographer$CallbackRecord.run(Choreographer.java:792)
A/art: art/runtime/check_jni.cc:65] at android.view.Choreographer.doCallbacks(Choreographer.java:596)
A/art: art/runtime/check_jni.cc:65] at android.view.Choreographer.doFrame(Choreographer.java:556)
A/art: art/runtime/check_jni.cc:65] at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:778)
A/art: art/runtime/check_jni.cc:65] at android.os.Handler.handleCallback(Handler.java:739)
A/art: art/runtime/check_jni.cc:65] at android.os.Handler.dispatchMessage(Handler.java:95)
A/art: art/runtime/check_jni.cc:65] at android.os.Looper.loop(Looper.java:155)
A/art: art/runtime/check_jni.cc:65] at android.app.ActivityThread.main(ActivityThread.java:5696)
A/art: art/runtime/check_jni.cc:65] at java.lang.reflect.Method.invoke!(Native method)
A/art: art/runtime/check_jni.cc:65] at java.lang.reflect.Method.invoke(Method.java:372)
A/art: art/runtime/check_jni.cc:65] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1028)
A/art: art/runtime/check_jni.cc:65] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
Please anyone any idea how to fix this problem?
To fix this problem you have to update your XML file which contains SearchView and AppBarLayout. Add android:stateListAnimator="@null" to your AppBarLayout as shown below.
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:stateListAnimator="@null">
It shows warning that android:stateListAnimator="@null" attribute stateListAnimator is only used in API level 21. But I've checked source code of the library and it crashes in the SearchBehavior class when it tries to set mAppBarLayout.setStateListAnimator(null);
EDIT
As was mention in comments below this issue is related more to the android components native crash on scrolling in RecyclerView+CollapsingToolbarLayout
AppBarLayout's attribute app:elevation="..dp" helps to solve this problem
来源：https://stackoverflow.com/questions/40928788/cant-call-void-android-view-view-setelevationfloat-on-null-object-in-lapism-s