activity 短时间频繁启动导致冻屏黑屏

一. 描述

1. 执行monkey测试准备。
2. 离线执行monkey
【预期结果】：
正常进行测试无异常
【实际结果】：
monkey测试过程中频繁黑屏
【备注】:

monkey 脚本: 

adb shell "monkey -p com.android.dialer  --throttle 1000 --ignore-crashes --ignore-timeouts --ignore-security-exceptions --ignore-native-crashes --monitor-native-crashes -v 100000 >> /sdcard/Stability_base.txt 2>> /sdcard/Stability_base_err.txt"

二.分析

1.每隔0.1s启动一次DataSharingActivity。

07-08 17:25:34.639  1276  3330 I ActivityTaskManager: START u0 {act=android.intent.action.MAIN cat=[android.intent.category.HOME] flg=0x10000100 cmp=com.qualcomm.qti.watchhome/com.android.watchhome.main.DataSharingActivity} from uid 0
07-08 17:25:34.715  1276  1373 I ActivityTaskManager: START u0 {act=android.intent.action.MAIN cat=[android.intent.category.HOME] flg=0x10000100 cmp=com.qualcomm.qti.watchhome/com.android.watchhome.main.DataSharingActivity} from uid 0

2. 查看日志，发现有很多Rejecting start

07-09 11:14:49.752 shell  4115  4131 I Monkey  :     // Rejecting start of Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER_APP] cmp=com.qualcomm.qti.watchhome/com.android.watchhome.main.MainActivity } in package com.qualcomm.qti.watchhome 

 三.查看代码

1. "Rejecting start" 打印来源

development/cmds/monkey/src/com/android/commands/monkey/Monkey.java

    /**
     * Monitor operations happening in the system.
     */
    private class ActivityController extends IActivityController.Stub {
        public boolean activityStarting(Intent intent, String pkg) {
            final boolean allow = isActivityStartingAllowed(intent, pkg);
            if (mVerbose > 0) {
                // StrictMode's disk checks end up catching this on
                // userdebug/eng builds due to PrintStream going to a
                // FileOutputStream in the end (perhaps only when
                // redirected to a file?)  So we allow disk writes
                // around this region for the monkey to minimize
                // harmless dropbox uploads from monkeys.
                StrictMode.ThreadPolicy savedPolicy = StrictMode.allowThreadDiskWrites();
                Logger.out.println("    // " + (allow ? "Allowing" : "Rejecting") + " start of "
                        + intent + " in package " + pkg);
                StrictMode.setThreadPolicy(savedPolicy);
            }
            currentPackage = pkg;
            currentIntent = intent;
            return allow;
        }

当不满足isActivityStartingAllowed 函数时，就会Rejecting,从代码逻辑上看，应该是有ACTION_MAIN，但是，没有包含CATEGORY_HOME，导致总是被Rejecting。

        private boolean isActivityStartingAllowed(Intent intent, String pkg) {
            if (MonkeyUtils.getPackageFilter().checkEnteringPackage(pkg)) {
                return true;
            }
            if (DEBUG_ALLOW_ANY_STARTS != 0) {
                return true;
            }
            // In case the activity is launching home and the default launcher
            // package is disabled, allow anyway to prevent ANR (see b/38121026)
            final Set<String> categories = intent.getCategories();
            if (intent.getAction() == Intent.ACTION_MAIN
                    && categories != null
                    && categories.contains(Intent.CATEGORY_HOME)) {
                try {
                    final ResolveInfo resolveInfo =
                            mPm.resolveIntent(intent, intent.getType(), 0,
                                    ActivityManager.getCurrentUser());
                    final String launcherPackage = resolveInfo.activityInfo.packageName;
                    if (pkg.equals(launcherPackage)) {
                        return true;
                    }
                } catch (RemoteException e) {
                    Logger.err.println("** Failed talking with package manager!");
                    return false;
                }
            }
            return false;
        }

 2. 查看MainActivity 定义：

   确实没有定义CATEGORY_HOME

45         <activity
46             android:name="com.android.watchhome.main.MainActivity"
47             android:label="@string/app_name"
48             android:clearTaskOnLaunch="true"
49             android:launchMode="singleInstance"
50             android:stateNotNeeded="true"
51             android:screenOrientation="nosensor"
52             android:theme="@style/LauncherTheme"
53             android:taskAffinity=""
54             android:enabled="true"
55             android:exported="true">
56 
57             <intent-filter>
58                 <action android:name="android.intent.action.MAIN" />
59                 <category android:name="android.intent.category.DEFAULT" />
60                 <category android:name="android.intent.category.LAUNCHER_APP"/>
61             </intent-filter>
62         </activity>

四. 方案：

    移除单独创建的 DataSharingActivity， 在MainActivity 中申请CATEGORY_HOME