D:\flutter_windows_v1.5.4-hotfix.2-stable\flutter\bin\flutter.bat doctor --verbose
[√] Flutter (Channel stable, v1.5.4-hotfix.2, on Microsoft Windows [Version 6.1.7601], locale zh-CN)
• Flutter version 1.5.4-hotfix.2 at D:\flutter_windows_v1.5.4-hotfix.2-stable\flutter
• Framework revision 7a4c334 (3 weeks ago), 2019-04-29 11:05:24 -0700
• Engine revision 52c7a1e
• Dart version 2.3.0 (build 2.3.0-dev.0.5 a1668566e5)

[√] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at E:\Sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-28, build-tools 28.0.3
• ANDROID_HOME = E:\Sdk
• Java binary at: C:\android-studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1248-b01)
• All Android licenses accepted.

[√] Android Studio (version 3.3)
• Android Studio at C:\android-studio
• Flutter plugin version 33.4.1
• Dart plugin version 182.5215
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1248-b01)

[!] Android Studio (version 3.2)
• Android Studio at D:\android-studio
X Flutter plugin not installed; this adds Flutter specific functionality.
X Dart plugin not installed; this adds Dart specific functionality.
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b05)

[√] Connected device (1 available)
• MIX 3 • 6f45ef07 • android-arm64 • Android 9 (API 28)

! Doctor found issues in 1 category.

when i finish activity，throw crash log：

2019-05-22 15:37:14.042 761-1902/? E/AudioFlinger: open /proc/24424/cmdline error
2019-05-22 15:37:14.134 24424-24424/ E/flutter: [ERROR:flutter/shell/platform/android/platform_view_android_jni.cc(40)] java.lang.NullPointerException: Attempt to invoke interface method 'boolean android.view.ViewParent.requestSendAccessibilityEvent(android.view.View, android.view.accessibility.AccessibilityEvent)' on a null object reference
at io.flutter.view.AccessibilityBridge.sendAccessibilityEvent(AccessibilityBridge.java:1444)
at io.flutter.view.AccessibilityBridge.createAndSendWindowChangeEvent(AccessibilityBridge.java:1461)
at io.flutter.view.AccessibilityBridge.updateSemantics(AccessibilityBridge.java:1254)
at io.flutter.view.AccessibilityBridge$1.updateSemantics(AccessibilityBridge.java:268)
at io.flutter.embedding.engine.FlutterJNI.updateSemantics(FlutterJNI.java:150)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:326)
at android.os.Looper.loop(Looper.java:165)
at android.app.ActivityThread.main(ActivityThread.java:6806)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
2019-05-22 15:37:14.134 24424-24424/com.huajiao.flutter A/flutter: [FATAL:flutter/shell/platform/android/platform_view_android_jni.cc(96)] Check failed: CheckException(env).

--------- beginning of crash

2019-05-22 15:37:14.135 24424-24424/com.xxxx.flutter A/libc: Fatal signal 6 (SIGABRT), code -6 (SI_TKILL) in tid 24424 (huajiao.flutter), pid 24424 (huajiao.flutter)
2019-05-22 15:37:14.220 674-1113/? E/qcreverb: [vendor/qcom/proprietary/mm-audio-noship/audio-effects/safx/android-adapter/qcreverb/qcreverb.c:474] Assertion fail: pConfig->inputCfg.format == AUDIO_FORMAT_PCM_16_BIT
2019-05-22 15:37:14.220 674-18367/? E/qcreverb: [vendor/qcom/proprietary/mm-audio-noship/audio-effects/safx/android-adapter/qcreverb/qcreverb.c:474] Assertion fail: pConfig->inputCfg.format == AUDIO_FORMAT_PCM_16_BIT
2019-05-22 15:37:14.221 674-14760/? E/qcreverb: [vendor/qcom/proprietary/mm-audio-noship/audio-effects/safx/android-adapter/qcreverb/qcreverb.c:474] Assertion fail: pConfig->inputCfg.format == AUDIO_FORMAT_PCM_16_BIT
2019-05-22 15:37:14.221 674-14760/? E/qcreverb: [vendor/qcom/proprietary/mm-audio-noship/audio-effects/safx/android-adapter/qcreverb/qcreverb.c:474] Assertion fail: pConfig->inputCfg.format == AUDIO_FORMAT_PCM_16_BIT
2019-05-22 15:37:14.435 24505-24505/? A/DEBUG: *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
2019-05-22 15:37:14.435 24505-24505/? A/DEBUG: Build fingerprint: 'Xiaomi/perseus/perseus:9/PKQ1.180729.001/V10.3.1.0.PEECNXM:user/release-keys'
2019-05-22 15:37:14.435 24505-24505/? A/DEBUG: Revision: '0'
2019-05-22 15:37:14.435 24505-24505/? A/DEBUG: ABI: 'arm'
2019-05-22 15:37:14.435 24505-24505/? A/DEBUG: pid: 24424, tid: 24424, name: huajiao.flutter >>> com.huajiao.flutter <<<
2019-05-22 15:37:14.435 24505-24505/? A/DEBUG: signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
2019-05-22 15:37:14.435 24505-24505/? A/DEBUG: Abort message: '[FATAL:flutter/shell/platform/android/platform_view_android_jni.cc(96)] Check failed: CheckException(env).
'
2019-05-22 15:37:14.435 24505-24505/? A/DEBUG: r0 00000000 r1 00005f68 r2 00000006 r3 00000008
2019-05-22 15:37:14.435 24505-24505/? A/DEBUG: r4 00005f68 r5 00005f68 r6 ff9e5624 r7 0000010c
2019-05-22 15:37:14.435 24505-24505/? A/DEBUG: r8 ffffffff r9 eab13500 r10 ffffffff r11 ff9e5734
2019-05-22 15:37:14.436 24505-24505/? A/DEBUG: ip ff9e55c0 sp ff9e5610 lr ebb2f139 pc ebb26e56
2019-05-22 15:37:14.971 24505-24505/? A/DEBUG: backtrace:
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #00 pc 0001ce56 /system/lib/libc.so (abort+58)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #1 pc 00af85ab /data/app/com.huajiao.flutter-ixDK3DTzGe7uzYBKRBoSNw==/lib/arm/libflutter.so (offset 0xaea000)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #2 pc 00aef239 /data/app/com.huajiao.flutter-ixDK3DTzGe7uzYBKRBoSNw==/lib/arm/libflutter.so (offset 0xaea000)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #3 pc 00aee317 /data/app/com.huajiao.flutter-ixDK3DTzGe7uzYBKRBoSNw==/lib/arm/libflutter.so (offset 0xaea000)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #4 pc 00b1d6c5 /data/app/com.huajiao.flutter-ixDK3DTzGe7uzYBKRBoSNw==/lib/arm/libflutter.so (offset 0xaea000)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #5 pc 00af8cf3 /data/app/com.huajiao.flutter-ixDK3DTzGe7uzYBKRBoSNw==/lib/arm/libflutter.so (offset 0xaea000)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #6 pc 00afb7ff /data/app/com.huajiao.flutter-ixDK3DTzGe7uzYBKRBoSNw==/lib/arm/libflutter.so (offset 0xaea000)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #7 pc 0000f37b /system/lib/libutils.so (android::Looper::pollInner(int)+818)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #8 pc 0000efcb /system/lib/libutils.so (android::Looper::pollOnce(int, int*, int*, void**)+26)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #9 pc 000b920f /system/lib/libandroid_runtime.so (android::android_os_MessageQueue_nativePollOnce(_JNIEnv*, _jobject*, long long, int)+24)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #10 pc 00ca8c45 /system/framework/arm/boot-framework.oat (offset 0x9c7000) (android.media.MediaExtractor.seekTo [DEDUPED]+92)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #11 pc 000082e9 /dev/ashmem/dalvik-jit-code-cache (deleted) (android.os.MessageQueue.next+184)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #12 pc 00413975 /system/lib/libart.so (art_quick_invoke_stub_internal+68)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #13 pc 003ecaf1 /system/lib/libart.so (art_quick_invoke_stub+224)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #14 pc 000a1c65 /system/lib/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+136)
2019-05-22 15:37:14.972 24505-24505/? A/DEBUG: #15 pc 001e6e65 /system/lib/libart.so (art::interpreter::ArtInterpreterToCompiledCodeBridge(art::Thread*, art::ArtMethod*, art::ShadowFrame*, unsigned short, art::JValue*)+236)
2019-05-22 15:37:14.974 24505-24505/? A/DEBUG: #16 pc 001e195f /system/lib/libart.so (bool art::interpreter::DoCall<false, false>(art::ArtMethod*, art::Thread*, art::ShadowFrame&, art::Instruction const*, unsigned short, art::JValue*)+814)
2019-05-22 15:37:14.974 24505-24505/? A/DEBUG: #17 pc 003e774f /system/lib/libart.so (MterpInvokeVirtual+442)
2019-05-22 15:37:14.974 24505-24505/? A/DEBUG: #18 pc 00406794 /system/lib/libart.so (ExecuteMterpImpl+14228)
2019-05-22 15:37:14.974 24505-24505/? A/DEBUG: #19 pc 00bc73cc /system/framework/boot-framework.vdex (android.os.Looper.loop+130)
2019-05-22 15:37:14.974 24505-24505/? A/DEBUG: #20 pc 001c60db /system/lib/libart.so (_ZN3art11interpreterL7ExecuteEPNS_6ThreadERKNS_20CodeItemDataAccessorERNS_11ShadowFrameENS_6JValueEb.llvm.448845121+378)
2019-05-22 15:37:14.974 24505-24505/? A/DEBUG: #21 pc 001ca7c1 /system/lib/libart.so (art::interpreter::ArtInterpreterToInterpreterBridge(art::Thread*, art::CodeItemDataAccessor const&, art::ShadowFrame*, art::JValue*)+152)
2019-05-22 15:37:14.974 24505-24505/? A/DEBUG: #22 pc 001e1947 /system/lib/libart.so (bool art::interpreter::DoCall<false, false>(art::ArtMethod*, art::Thread*, art::ShadowFrame&, art::Instruction const*, unsigned short, art::JValue*)+790)
2019-05-22 15:37:14.974 24505-24505/? A/DEBUG: #23 pc 003e872b /system/lib/libart.so (MterpInvokeStatic+130)
2019-05-22 15:37:14.974 24505-24505/? A/DEBUG: #24 pc 00406914 /system/lib/libart.so (ExecuteMterpImpl+14612)
2019-05-22 15:37:14.974 24505-24505/? A/DEBUG: #25 pc 004231f6 /system/framework/boot-framework.vdex (android.app.ActivityThread.main+214)
2019-05-22 15:37:14.974 24505-24505/? A/DEBUG: #26 pc 001c60db /system/lib/libart.so (_ZN3art11interpreterL7ExecuteEPNS_6ThreadERKNS_20CodeItemDataAccessorERNS_11ShadowFrameENS_6JValueEb.llvm.448845121+378)
2019-05-22 15:37:14.974 24505-24505/? A/DEBUG: #27 pc 001ca707 /system/lib/libart.so (art::interpreter::EnterInterpreterFromEntryPoint(art::Thread*, art::CodeItemDataAccessor const&, art::ShadowFrame*)+82)
2019-05-22 15:37:14.974 24505-24505/? A/DEBUG: #28 pc 003db251 /system/lib/libart.so (artQuickToInterpreterBridge+880)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #29 pc 00417eff /system/lib/libart.so (art_quick_to_interpreter_bridge+30)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #30 pc 00413975 /system/lib/libart.so (art_quick_invoke_stub_internal+68)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #31 pc 003ecbf3 /system/lib/libart.so (art_quick_invoke_static_stub+222)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #32 pc 000a1c77 /system/lib/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+154)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #33 pc 00349b9d /system/lib/libart.so (art::(anonymous namespace)::InvokeWithArgArray(art::ScopedObjectAccessAlreadyRunnable const&, art::ArtMethod*, art::(anonymous namespace)::ArgArray*, art::JValue*, char const*)+52)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #34 pc 0034afed /system/lib/libart.so (art::InvokeMethod(art::ScopedObjectAccessAlreadyRunnable const&, _jobject*, _jobject*, _jobject*, unsigned int)+1024)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #35 pc 002fcdfd /system/lib/libart.so (art::Method_invoke(_JNIEnv*, _jobject*, _jobject*, _jobjectArray*)+40)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #36 pc 006aaee7 /system/framework/arm/boot-core-oj.oat (offset 0x2c9000) (java.lang.Class.getDeclaredMethodInternal [DEDUPED]+110)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #37 pc 00413975 /system/lib/libart.so (art_quick_invoke_stub_internal+68)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #38 pc 003ecaf1 /system/lib/libart.so (art_quick_invoke_stub+224)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #39 pc 000a1c65 /system/lib/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+136)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #40 pc 001e6e65 /system/lib/libart.so (art::interpreter::ArtInterpreterToCompiledCodeBridge(art::Thread*, art::ArtMethod*, art::ShadowFrame*, unsigned short, art::JValue*)+236)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #41 pc 001e195f /system/lib/libart.so (bool art::interpreter::DoCall<false, false>(art::ArtMethod*, art::Thread*, art::ShadowFrame&, art::Instruction const*, unsigned short, art::JValue*)+814)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #42 pc 003e774f /system/lib/libart.so (MterpInvokeVirtual+442)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #43 pc 00406794 /system/lib/libart.so (ExecuteMterpImpl+14228)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #44 pc 012873a /system/framework/boot-framework.vdex (com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run+22)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #45 pc 001c60db /system/lib/libart.so (_ZN3art11interpreterL7ExecuteEPNS_6ThreadERKNS_20CodeItemDataAccessorERNS_11ShadowFrameENS_6JValueEb.llvm.448845121+378)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #46 pc 001ca707 /system/lib/libart.so (art::interpreter::EnterInterpreterFromEntryPoint(art::Thread*, art::CodeItemDataAccessor const&, art::ShadowFrame*)+82)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #47 pc 003db251 /system/lib/libart.so (artQuickToInterpreterBridge+880)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #48 pc 00417eff /system/lib/libart.so (art_quick_to_interpreter_bridge+30)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #49 pc 01eb0537 /system/framework/arm/boot-framework.oat (offset 0x9c7000) (com.android.internal.os.ZygoteInit.main+1750)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #50 pc 00413975 /system/lib/libart.so (art_quick_invoke_stub_internal+68)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #51 pc 003ecbf3 /system/lib/libart.so (art_quick_invoke_static_stub+222)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #52 pc 000a1c77 /system/lib/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+154)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #53 pc 00349b9d /system/lib/libart.so (art::(anonymous namespace)::InvokeWithArgArray(art::ScopedObjectAccessAlreadyRunnable const&, art::ArtMethod*, art::(anonymous namespace)::ArgArray*, art::JValue*, char const*)+52)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #54 pc 003499c7 /system/lib/libart.so (art::InvokeWithVarArgs(art::ScopedObjectAccessAlreadyRunnable const&, _jobject*, _jmethodID*, std::__va_list)+310)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #55 pc 0028fe81 /system/lib/libart.so (art::JNI::CallStaticVoidMethodV(_JNIEnv*, _jclass*, _jmethodID*, std::__va_list)+444)
2019-05-22 15:37:14.975 24505-24505/? A/DEBUG: #56 pc 0006daef /system/lib/libandroid_runtime.so (_JNIEnv::CallStaticVoidMethod(_jclass*, _jmethodID*, ...)+30)
2019-05-22 15:37:14.976 24505-24505/? A/DEBUG: #57 pc 0006fe83 /system/lib/libandroid_runtime.so (android::AndroidRuntime::start(char const*, android::Vectorandroid::String8 const&, bool)+518)
2019-05-22 15:37:14.976 24505-24505/? A/DEBUG: #58 pc 00001b23 /system/bin/app_process32 (main+890)
2019-05-22 15:37:14.976 24505-24505/? A/DEBUG: #59 pc 0008b15d /system/lib/libc.so (__libc_init+48)
2019-05-22 15:37:14.976 24505-24505/? A/DEBUG: #60 pc 00001767 /system/bin/app_process32 (_start_main+38)
2019-05-22 15:37:14.976 24505-24505/? A/DEBUG: #61 pc 00000306 anonymous:ee734000
2019-05-22 15:37:15.639 24505-24505/? E/crash_dump32: cannot open libmiuindbg.so: No such file or directory
2019-05-22 15:37:15.639 1006-1006/? E//system/bin/tombstoned: Tombstone written to: /data/tombstones/tombstone_07