Android获取所有Activity

1 方式一

    public void getAllActivity() {PackageManager packageManager = getPackageManager();PackageInfo packageInfo = null;try {packageInfo = packageManager.getPackageInfo(getPackageName(), PackageManager.GET_ACTIVITIES);//所有的Activity ActivityInfo[] activities = packageInfo.activities;for (ActivityInfo activity :activities ) {Class<?> aClass = Class.forName(activity.name);}} catch (PackageManager.NameNotFoundException | ClassNotFoundException e) {e.printStackTrace();}}

2 方式二反射

    private static List<Activity> getActivitiesByApplication(Application application) {List<Activity> list = new ArrayList<>();try {Class<Application> applicationClass = Application.class;Field mLoadedApkField = applicationClass.getDeclaredField("mLoadedApk");mLoadedApkField.setAccessible(true);Object mLoadedApk = mLoadedApkField.get(application);Class<?> mLoadedApkClass = mLoadedApk.getClass();Field mActivityThreadField = mLoadedApkClass.getDeclaredField("mActivityThread");mActivityThreadField.setAccessible(true);Object mActivityThread = mActivityThreadField.get(mLoadedApk);Class<?> mActivityThreadClass = mActivityThread.getClass();Field mActivitiesField = mActivityThreadClass.getDeclaredField("mActivities");mActivitiesField.setAccessible(true);Object mActivities = mActivitiesField.get(mActivityThread);// 注意这里一定写成Map，低版本这里用的是HashMap，高版本用的是ArrayMapif (mActivities instanceof Map) {@SuppressWarnings("unchecked")Map<Object, Object> arrayMap = (Map<Object, Object>) mActivities;for (Map.Entry<Object, Object> entry : arrayMap.entrySet()) {Object value = entry.getValue();Class<?> activityClientRecordClass = value.getClass();Field activityField = activityClientRecordClass.getDeclaredField("activity");activityField.setAccessible(true);Object o = activityField.get(value);list.add((Activity) o);}}} catch (Exception e) {e.printStackTrace();list = null;}return list;}

3 获取栈顶 Activity

    //获取栈顶Activity及其所属进程public static String getTopActivityNameAndProcessName(Context context) {String processName = null;String topActivityName = null;ActivityManager activityManager =(ActivityManager) (context.getSystemService(android.content.Context.ACTIVITY_SERVICE));List<ActivityManager.RunningTaskInfo> runningTaskInfos = activityManager.getRunningTasks(1);if (runningTaskInfos != null) {ActivityManager.RunningTaskInfo runningTaskInfo = runningTaskInfos.get(0);ComponentName f = runningTaskInfo.topActivity;String topActivityClassName = f.getClassName();String temp[] = topActivityClassName.split("\\.");//栈顶Activity的名称topActivityName = temp[temp.length - 1];int index = topActivityClassName.lastIndexOf(".");//栈顶Activity所属进程的名称processName = topActivityClassName.substring(0, index);System.out.println("---->topActivityName=" + topActivityName + ",processName=" + processName);}return topActivityName;}

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Android获取所有Activity

1 方式一

2 方式二反射

3 获取栈顶 Activity

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Android获取所有Activity

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