[英]How to programmatically set a lock or pin for an app
所以现在我正在尝试为我的孩子们开发一个 Android 应用程序。 我想在特定时间段内为选定的应用程序设置 PIN 码或密码,以防止它们打开应用程序。 例如,假设我的女儿想在我工作时在我的手机上玩一段时间的愤怒的小鸟。 当她玩愤怒的小鸟时,我会选择我的重要应用程序,例如消息传递、gmail 等,并在上面放置 30 分钟的 PIN 码或密码。 30 分钟后,我从女儿那里拿到手机,我可以在没有密码的情况下打开应用程序,因为时限已过。
我对此进行了大量研究,但我一直无法找到适合我的特定案例的实现。
我知道应用程序锁与我想要做的具有类似的结构。 我只是为锁定设置一个时间限制。
https://play.google.com/store/apps/details?id=com.domobile.applock&hl=en
我正在远离使用 ActivityManager 等杀死活动/应用程序。我真的只想在选定的应用程序上在特定时间段内有一个干净的锁定屏幕。
我有一个 CountdownTimer 来倒计时我设置的时间。 如果我拥有所有包名,我将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();
编辑: http : //pastebin.com/MHGFw7PK
逻辑
现在代码示例:
要启动一个服务,代码如下,
startService(new Intent(this, SaveMyAppsService.class));
现在,在您的服务中,检查这样的包裹,
public class SaveMyAppsService extends android.app.Service { String CURRENT_PACKAGE_NAME = {your this app packagename}; String lastAppPN = ""; boolean noDelay = false; public static SaveMyAppsService instance; @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(); } } }
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
}
}
我创建了小型演示项目。 希望这可能对某人有用Link to project
您也可以使用 DialogAlertView:
我认为这很容易做到。 没有人也可以破解密码。 假设如果有人卸载(或清除数据)应用程序,那么他们必须重新登录或注册(这样更安全)。
提示 - 您可以将密码保存在云端或任何您想要的地方。
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