如何以编程方式为应用设置锁或固定编辑：（获取棒棒糖的顶级包装名称）

android java countdown android-package-managers device-policy-manager

2022-09-02 21:44:50

所以现在我正试图为我年幼的孩子开发一个Android应用程序。我想在选定的应用程序上设置一个或多个密码，以阻止它们打开应用程序。例如，假设我的女儿想在我工作时在手机上玩愤怒的小鸟一段时间。我会选择我的重要应用程序，如消息传递，gmail等，并在她玩愤怒的小鸟时将PIN或密码放在上面30分钟。30分钟后，我从女儿那里拿到手机，我可以在没有别针的情况下打开应用程序，因为时间限制已过期。

我对此做了大量的研究，但我无法为我的特定情况找到实现。

安卓“应用程序锁定”应用程序如何工作？

我知道应用程序锁具有与我想要做的类似的结构。我只是为锁设置一个时间限制。

https://play.google.com/store/apps/details?id=com.domobile.applock&hl=en

我正在远离使用活动管理器等杀死活动/应用程序。我真的只是想要在特定时间内在选定的应用程序上获得干净的锁定屏幕。

我有一个倒计时计时器，用于在我设置的时间倒计时。如果我拥有所有包名，如何修改此代码以在选定的时间内阻止某些应用程序？

    start_timer.setOnClickListener(new View.OnClickListener() {


        @Override
        public void onClick(View view) {

            new AlertDialog.Builder( MainActivity.this )
                    .setMessage( "Are you sure you want to block the selected apps for the set amount of time?" )
                    .setPositiveButton( "Yeah man!", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int which) {
                            Log.d( "AlertDialog", "Positive" );

                            hourint = Integer.valueOf(number_text.getText().toString());

                            minuteint = Integer.valueOf(minute_text.getText().toString());

                            secondint = Integer.valueOf(second_text.getText().toString());

                            Log.i("YourActivity", "Hours: " + hourint);

                            Log.i("YourActivity", "Minutes: " + minuteint);

                            Log.i("YourActivity", "Seconds: " + secondint);

                            totalTimeCountInMilliseconds = ((hourint*60*60) +(minuteint*60) + (secondint)) * 1000;      // time count
                            timeBlinkInMilliseconds = 30*1000;

                            countDownTimer = new CountDownTimer(totalTimeCountInMilliseconds, 500) {
                                // 500 means, onTick function will be called at every 500 milliseconds

                                @Override
                                public void onTick(long leftTimeInMilliseconds) {
                                    Context context = MainActivity.this;





                                    long seconds = leftTimeInMilliseconds / 1000;
                                    mSeekArc.setVisibility(View.INVISIBLE);
                                    start_timer.setVisibility(View.INVISIBLE);
                                    block_button1.setVisibility(View.INVISIBLE);



                                    if ( leftTimeInMilliseconds < timeBlinkInMilliseconds ) {
                                        // textViewShowTime.setTextAppearance(getApplicationContext(), R.style.blinkText);
                                        // change the style of the textview .. giving a red alert style

                                        if ( blink ) {
                                            number_text.setVisibility(View.VISIBLE);
                                            minute_text.setVisibility(View.VISIBLE);
                                            second_text.setVisibility(View.VISIBLE);


                                            // if blink is true, textview will be visible
                                        } else {
                                            number_text.setVisibility(View.INVISIBLE);
                                            minute_text.setVisibility(View.INVISIBLE);
                                            second_text.setVisibility(View.INVISIBLE);


                                        }

                                        blink = !blink;         // toggle the value of blink
                                    }

                                    second_text.setText(String.format("%02d", seconds % 60));
                                    minute_text.setText(String.format("%02d", (seconds / 60) % 60));
                                    number_text.setText(String.format("%02d", seconds / 3600));                     // format the textview to show the easily readable format
                                }


                                @Override
                                public void onFinish() {
                                    // this function will be called when the timecount is finished
                                    //textViewShowTime.setText("Time up!");
                                    number_text.setVisibility(View.VISIBLE);
                                    minute_text.setVisibility(View.VISIBLE);
                                    second_text.setVisibility(View.VISIBLE);
                                    mSeekArc.setVisibility(View.VISIBLE);
                                    start_timer.setVisibility(View.VISIBLE);
                                    block_button1.setVisibility(View.VISIBLE);


                                }

                            }.start();
                        }
                    })
                    .setNegativeButton("Nope!", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int which) {
                            Log.d("AlertDialog", "Negative");
                            dialog.cancel();
                        }
                    })
                    .show();

已编辑： http://pastebin.com/MHGFw7PK

答案 1

逻辑

当您想要阻止应用程序时，您必须创建并启动服务，
在服务中，您必须检查应用程序的包名称，以便您可以决定运行哪个应用程序以及显示PIN/密码活动的应用程序

现在代码示例：

要启动服务，请编写如下代码：

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

现在，在您的服务内部，检查这样的包，

public class SaveMyAppsService extends android.app.Service 
{

    String CURRENT_PACKAGE_NAME = {your this app packagename};
    String lastAppPN = "";
    boolean noDelay = false;
    public static SaveMyAppsService instance;

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public 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 activity
    if (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();
        }
    }
}

编辑：（获取棒棒糖的顶级包装名称）

一个非常好的答案在这里。

答案 2

String lastAppPN = "";
public void checkRunningApps() {
    ActivityManager mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
    String activityOnTop;
    if (Build.VERSION.SDK_INT > 20) {
        activityOnTop = mActivityManager.getRunningAppProcesses().get(0).processName;
    } else {
        List<ActivityManager.RunningTaskInfo> RunningTask = mActivityManager.getRunningTasks(1);
        ActivityManager.RunningTaskInfo ar = RunningTask.get(0);
        activityOnTop = ar.topActivity.getPackageName();
    }
    //Log.e("activity on TOp", "" + activityOnTop);

    // Provide the packagename(s) of apps here, you want to show password activity
    if (activityOnTop.contains("whatsapp")  // you can make this check even better
            || activityOnTop.contains(CURRENT_PACKAGE_NAME)) {
        if (!(lastAppPN.equals(activityOnTop))) {
            lastAppPN = activityOnTop;
            Log.e("Whatsapp", "started");
        }
    } else {
        if (lastAppPN.contains("whatsapp")) {
            if (!(activityOnTop.equals(lastAppPN))) {
                Log.e("Whatsapp", "stoped");
                lastAppPN = "";
            }
        }
        // DO nothing
    }
}