So right now I am trying to develop an Android App for my young children. I want to set a pin or passwords on selected applications for a particular amount of time to prevent them from opening the app. For example, let's say that my daughter wants to play angry birds for some time on my phone while I am doing work. I will select my important apps like messaging, gmail, etc and put a pin or password on it for 30 minutes while she plays angry birds. After 30 minutes, I get my phone from my daughter and I can open the app without a pin because the time limit expired.
I have done a ton of research on this, but I haven't been able to find an implementation for my particular case.
How do android "app lock" applications work?
I know that app lock has a similar kind of structure of what I want to do. I just to place a time limit for the lock.
https://play.google.com/store/apps/details?id=com.domobile.applock&hl=en
I am staying away from killing activities/ applications with ActivityManager etc. I really just want a clean lock screen over a selected app for a particular amount of time.
I have a CountdownTimer to count down the timer for a time I set. How would I modify this code to block certain applications for a chosen amount of time if I had all the packagename?
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();
EDITED: http://pastebin.com/MHGFw7PK
Logic
Now Code Example:
To Start a service, code like this,
startService(new Intent(this, SaveMyAppsService.class));
Now, Inside your service, check packages like this,
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();
}
}
}