如何以编程方式为应用设置锁或大头针

逻辑

• 当您要阻止应用时，您必须制作并启动一项服务，
• 在“服务”中，您必须检查应用程序的程序包名称，以便可以决定要运行哪个应用程序以及哪个应用程序显示密码/密码活动

现在的代码示例 ：

• 要启动服务，请使用以下代码，

  startService(new Intent(this, SaveMyAppsService.class));

• 现在，在您的服务内部，检查像这样的包裹，

  public class SaveMyAppsService extends android.app.Service

  {

  String CURRENT_PACKAGE_NAME = {your this app packagename};String lastAppPN = "";boolean noDelay = false;public static SaveMyAppsService instance;@Overridepublic IBinder onBind(Intent intent) {    // TODO Auto-generated method stub    return null;}@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {    // TODO Auto-generated method stub    scheduleMethod();    CURRENT_PACKAGE_NAME = getApplicationContext().getPackageName();    Log.e("Current PN", "" + CURRENT_PACKAGE_NAME);    instance = this;    return START_STICKY;}private void scheduleMethod() {    // TODO Auto-generated method stub    ScheduledExecutorService scheduler = Executors .newSingleThreadScheduledExecutor();    scheduler.scheduleAtFixedRate(new Runnable() {        @Override        public void run() { // TODO Auto-generated method stub // This method will check for the Running apps after every 100ms if(30 minutes spent){      stop(); }else{    checkRunningApps();}        }    }, 0, 100, TimeUnit.MILLISECONDS);}public void checkRunningApps() {    ActivityManager mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);    List<ActivityManager.RunningTaskInfo> RunningTask = mActivityManager.getRunningTasks(1);    ActivityManager.RunningTaskInfo ar = RunningTask.get(0);    String activityonTop = ar.topActivity.getPackageName();    Log.e("activity on TOp", "" + activityOnTop);    // Provide the packagename(s) of apps here, you want to show password activityif (activityOnTop.contains("whatsapp")  // you can make this check even better        || activityOnTop.contains(CURRENT_PACKAGE_NAME)) {        // Show Password Activity         } else {        // DO nothing    } }public static void stop() {    if (instance != null) {    instance.stopSelf();    }}

  }