android log分析及异常关键字分析启动或退出APP执行过程与过滤"ActivityManager |WindowManager" 标签

private static final boolean IS_DEBUG_BUILD = Build.TYPE.equals("eng") || Build.TYPE.equals("userdebug");

分析异常时往往需要关注的重要目录：

/data/anr/traces.txt
/data/tombstones/tombstone_X
/data/system/dropbox/

Log.i("LogTag","------------", new Exception()); 人为抛出异常打印运行堆栈，此命令适用于源码编译中，但在APP中使用就会报错,APP中可以这样使用：

Log.i("LogTag","------------",“ ---”+new Exception());

Thread.currentThread().dumpStack(); //方法1

Log.d(TAG,"Gityuan", new RuntimeException("Gityuan")); //方法2

new RuntimeException("Gityuan").printStackTrace(); //方法3

MTK的mtkloger：

进入应用暗码： *#*#3646633#*#*
log的保存路径 /storage/emulated/0/mtklog

如部分平板系统预装拨号盘如何打开MTKlog

adb shell am start -n com.mediatek.mtklogger/com.mediatek.mtklogger.MainActivity

mtklog 的分类：MDLog、Mobile Log、Network Log，可能出现的aee_exp log

MD log：medom 相关底层的log

Mobile Log：主要是Android log 和kernel log

Network log：网络相关log

aee_exp log ：crash ANR 重启相关的log输出

对应log文件名称为：

crash_log ：崩溃日志，主要输出程序崩溃造成的crash log

events_log：事件日志，主要输出记录各个activity周期及事件

kernel_log：底层驱动，按键，低内存相关log

sys_log：系统日志，Exception定位点

radio_log：输出通话，网络状态变化

main_log：详尽输出每一步的log

参考原文： https://blog.csdn.net/weixin_33473519/article/details/53434800?utm_source=blogxgwz

https://rayleeya.iteye.com/blog/1955652 此文对android的anr问题有详细说明

ANR，是“Application Not Responding”的缩写，即“应用程序无响应”。在Android中，ActivityManagerService（简称AMS）和WindowManagerService（简称WMS）会监测应用程序的响应时间，如果应用程序主线程（即UI线程）在超时时间内对输入事件没有处理完毕，或者对特定操作没有执行完毕，就会出现ANR。对于输入事件没有处理完毕产生的ANR，Android会显示一个对话框，提示用户当前应用程序没有响应，用户可以选择继续等待或者关闭这个应用程序（也就是杀掉这个应用程序的进程）。

1:关键字搜索：

FATAL,leaked, block,Pid id XXX,crash,DALVIK THREADS, OOM,unfinished died

查找应用包名--快速定位ANR

The application may be doing too much work on its main thread.

AndroidRuntime(xxxx): Shutting down VM

线程的状态是native则表示当前正在执行jni,

聪明的你肯定已经知道，之所以trace信息会输出到“/data/anr/traces.txt”文件中，就是系统属性“dalvik.vm.stack-trace-file”设置的。你可以通过在设备的shell中使用setprop和getprop对系统属性进行设置和读取：

getprop dalvik.vm.stack-trace-file

setprop dalvik.vm.stack-trace-file /tmp/stack-traces.txt

此 Dialog的java位置：

frameworks\base\services\core\java\com\android\server\am\AppNotRespondingDialog.java

alps\frameworks\base\services\core\java\com\android\server\am\AppErrors.java ::appNotResponding()

 此处发送Handler message为  SHOW_NOT_RESPONDING_UI_MSG
 // Set the app's notResponding state, and look up the errorReportReceiver
            makeAppNotRespondingLocked(app,
                    activity != null ? activity.shortComponentName : null,
                    annotation != null ? "ANR " + annotation : "ANR",
                    info.toString());

            // Bring up the infamous App Not Responding dialog
            Message msg = Message.obtain();
            msg.what = ActivityManagerService.SHOW_NOT_RESPONDING_UI_MSG;
            msg.obj = new AppNotRespondingDialog.Data(app, activity, aboveSystem);

            mService.mUiHandler.sendMessage(msg);

接着会在ActivityManagerService.java类中接收此Message并对应处理

  alps\frameworks\base\services\core\java\com\android\server\am\ActivityManagerService.java

  final class UiHandler extends Handler {
        public UiHandler() {
            super(com.android.server.UiThread.get().getLooper(), null, true);
        }

        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
            case SHOW_ERROR_UI_MSG: {
                mAppErrors.handleShowAppErrorUi(msg);
                ensureBootCompleted();
            } break;
            case SHOW_NOT_RESPONDING_UI_MSG: {
                mAppErrors.handleShowAnrUi(msg);
                ensureBootCompleted();
            } break;

在AppError.java中的handleShowAppErrorUI()

            if (mService.canShowErrorDialogs() || showBackground) {
                dialogToShow = new AppNotRespondingDialog(mService, mContext, data);
                proc.anrDialog = dialogToShow;
            } else {
                MetricsLogger.action(mContext, MetricsProto.MetricsEvent.ACTION_APP_ANR,
                        AppNotRespondingDialog.CANT_SHOW);
                // Just kill the app if there is no dialog to be shown.
                mService.killAppAtUsersRequest(proc, null);
            }
        }
        // If we've created a crash dialog, show it without the lock held
        if (dialogToShow != null) {
            dialogToShow.show();
        }

两个标签同时过滤adb 命令: adb shell "logcat |grep -e ActivityManager: -e WindowManager:"

下面的打印为了log信息减少，所以分别打印方便查阅，

C:\Users\User>adb logcat |findstr "ActivityManager" \\点击Launcher中图标打开APP DeskClock
08-12 06:35:09.605 1043 8961 I ActivityManager: START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.android.deskclock/.DeskClock bnds=[795,131][990
,423]} from uid 10015
08-12 06:35:09.703 1043 8961 V WindowManager: Changing focus from Window{cfe72a u0 com.android.launcher3/com.android.launcher3.Launcher} to null Callers=com.android.server.wm.WindowManagerService.se
tFocusedApp:2739 com.android.server.am.ActivityManagerService.setResumedActivityUncheckLocked:3325 com.android.server.am.ActivityStack.setResumedActivityLocked:2312 com.android.server.am.ActivityStack
.minimalResumeActivityLocked:1115
08-12 06:35:09.890 1043 1121 I ActivityManager: Displayed com.android.deskclock/.DeskClock: +201ms
--------------------------------------------------------------------------------
C:\Users\User>adb logcat -c|findstr "ActivityManager"

C:\Users\User>adb logcat |findstr "ActivityManager" \\退出APP
08-12 06:35:29.715 1043 1078 V WindowManager: Changing focus from Window{4cebd29 u0 com.android.deskclock/com.android.deskclock.DeskClock} to null Callers=com.android.server.wm.WindowManagerService.
setFocusedApp:2739 com.android.server.am.ActivityManagerService.setResumedActivityUncheckLocked:3325 com.android.server.am.ActivityStack.setResumedActivityLocked:2312 com.android.server.am.ActivitySta
ck.resumeTopActivityInnerLocked:2694

User>adb logcat -c |findstr "WindowManager:"

User>adb logcat |findstr "WindowManager:" //点击Launcher中图标打开APP:DeskClock
21:06.149 1043 1315 V WindowManager: Set focused app to: AppWindowToken{24e89b8 token=Token{b72727a ActivityRecord{5decea5 u0 com.android.deskclock/.DeskClock t43}}} old focus=AppWindowToke
token=Token{64857d6 ActivityRecord{eb9b98 u0 com.android.launcher3/.Launcher t33}}} moveFocusNow=true
21:06.149 1043 1315 V WindowManager: findFocusedWindow: No focusable windows.
21:06.149 1043 1315 V WindowManager: Changing focus from Window{cfe72a u0 com.android.launcher3/com.android.launcher3.Launcher} to null Callers=com.android.server.wm.WindowManagerService.se
pp:2739 com.android.server.am.ActivityManagerService.setResumedActivityUncheckLocked:3325 com.android.server.am.ActivityStack.setResumedActivityLocked:2312 com.android.server.am.ActivityStack
esumeActivityLocked:1115
21:06.149 1043 1315 D WindowManager: Input focus has changed to null
21:06.152 1043 1315 V WindowManager: findFocusedWindow: No focusable windows.
21:06.160 1043 6439 V WindowManager: findFocusedWindow: No focusable windows.
21:06.481 1043 2119 I WindowManager: Relayout Window{c7e57f5 u0 com.android.deskclock/com.android.deskclock.DeskClock}: oldVis=4 newVis=0 focusMayChange = true
21:06.487 1043 2119 V WindowManager: Changing focus from null to Window{c7e57f5 u0 com.android.deskclock/com.android.deskclock.DeskClock} Callers=com.android.server.wm.WindowManagerService.
indow:2179 com.android.server.wm.Session.relayout:235 android.view.IWindowSession$Stub.onTransact:286 com.android.server.wm.Session.onTransact:162
21:06.487 1043 2119 D WindowManager: Input focus has changed to Window{c7e57f5 u0 com.android.deskclock/com.android.deskclock.DeskClock}

-------------------------------------------------------------------------------------

User>adb logcat -c|findstr "WindowManager:"

User>adb logcat |findstr "WindowManager:" //退出APP:DeskClock 到Launcher
21:27.964 1043 1226 D WindowManager: interceptKeyTi keyCode=4 down=false repeatCount=0 keyguardOn=false mHomePressed=false canceled=false metaState:0
21:27.984 1043 6439 V WindowManager: Set focused app to: AppWindowToken{fb1c0e3 token=Token{64857d6 ActivityRecord{eb9b98 u0 com.android.launcher3/.Launcher t33}}} old focus=AppWindowToken{
oken=Token{b72727a ActivityRecord{5decea5 u0 com.android.deskclock/.DeskClock t43}}} moveFocusNow=true
21:27.984 1043 6439 V WindowManager: findFocusedWindow: No focusable windows.
21:27.985 1043 6439 V WindowManager: Changing focus from Window{c7e57f5 u0 com.android.deskclock/com.android.deskclock.DeskClock} to null Callers=com.android.server.wm.WindowManagerService.
dApp:2739 com.android.server.am.ActivityManagerService.setResumedActivityUncheckLocked:3325 com.android.server.am.ActivityStack.setResumedActivityLocked:2312 com.android.server.am.ActivitySta
TopActivityInnerLocked:2694
21:27.985 1043 6439 D WindowManager: Input focus has changed to null
21:28.002 1043 1315 V WindowManager: findFocusedWindow: No focusable windows.
21:28.044 1043 6439 I WindowManager: Relayout Window{cfe72a u0 com.android.launcher3/com.android.launcher3.Launcher}: oldVis=4 newVis=0 focusMayChange = true
21:28.048 1043 6439 V WindowManager: Changing focus from null to Window{cfe72a u0 com.android.launcher3/com.android.launcher3.Launcher} Callers=com.android.server.wm.WindowManagerService.re
dow:2179 com.android.server.wm.Session.relayout:235 android.view.IWindowSession$Stub.onTransact:286 com.android.server.wm.Session.onTransact:162
21:28.048 1043 6439 D WindowManager: Input focus has changed to Window{cfe72a u0 com.android.launcher3/com.android.launcher3.Launcher}