Crash 日志如下：

--- crash start --- [command] logcat -b crash -t '09-09 22:01:37.000' -d --------- beginning of crash 09-09 22:01:38.691  8104  8127 E AndroidRuntime: FATAL EXCEPTION: launcher-loader 09-09 22:01:38.691  8104  8127 E AndroidRuntime: Process: com.google.android.apps.nexuslauncher, PID: 8104 09-09 22:01:38.691  8104  8127 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.String java.lang.CharSequence.toString()' on a null object reference 09-09 22:01:38.691  8104  8127 E AndroidRuntime:        at com.android.launcher3.icons.cache.BaseIconCache.addIconToDBAndMemCache(SourceFile:12) 09-09 22:01:38.691  8104  8127 E AndroidRuntime:        at com.android.launcher3.icons.cache.IconCacheUpdateHandler$SerializedIconUpdateTask.run(SourceFile:21) 09-09 22:01:38.691  8104  8127 E AndroidRuntime:        at android.os.Handler.handleCallback(Handler.java:938) 09-09 22:01:38.691  8104  8127 E AndroidRuntime:        at android.os.Handler.dispatchMessage(Handler.java:99) 09-09 22:01:38.691  8104  8127 E AndroidRuntime:        at android.os.Looper.loop(Looper.java:223) 09-09 22:01:38.691  8104  8127 E AndroidRuntime:        at android.os.HandlerThread.run(HandlerThread.java:67) --- crash end --- 

用冰箱二分法找到了是一个叫做“Screen Recorder”的应用导致的，结合 FC log 可能是因为图标一类的 metadata 不规范导致没法加到 cache 里，杀之泄愤，毕竟 Android 11 自带了屏幕录像。