How to make app locker in android studio source code

 

 

 

import android.app.ActivityManager; import android.app.Notification; import android.app.NotificationChannel; import android.app.NotificationManager; import android.app.Service; import android.app.usage.UsageStats; import android.app.usage.UsageStatsManager; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.graphics.Color; import android.os.Build; import android.os.IBinder; import androidx.annotation.Nullable; import androidx.annotation.RequiresApi; import androidx.core.app.NotificationCompat; import android.util.Log; import java.util.ArrayList; import java.util.List; import java.util.SortedMap; import java.util.Timer; import java.util.TimerTask; import java.util.TreeMap; public class BackgroundServices extends Service { private BroadcastReceiver receiver; public int counter=0; LockScreen obj = new LockScreen(); // context is important // every gui or view or activity have context

 

 

 

// i will use context of NotificationService class

 

 

 

Context mContext; // database class

 

 

 

Apply_password_on_AppDatabase db = new Apply_password_on_AppDatabase(this); // flag is used for stopping or running loop check of

 

 

 

// current app running

 

 

 

static int flag = 0 ; static int flag2 = 0; // when any app is lanuch and it have password set on it

 

 

 

// that app name save in current_app varaible

 

 

 

String current_app = “”; public BackgroundServices (){} @Override public void onCreate() { super.onCreate(); // add context of NotificationService to mContext variable

 

 

 

mContext = this; // oreo used different approach for background services

 

 

 

// other use same approach if (Build.VERSION.SDK_INT > Build.VERSION_CODES.O) startMyOwnForeground(); else startForeground(1, new Notification()); } // oreo api approach @RequiresApi(Build.VERSION_CODES.O) private void startMyOwnForeground() { String NOTIFICATION_CHANNEL_ID = “example.permanence”; String channelName = “Background Service”; NotificationChannel chan = new NotificationChannel(NOTIFICATION_CHANNEL_ID, channelName,

NotificationManager.IMPORTANCE_NONE);

 

chan.setLightColor(Color.BLUE); chan.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE); NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); assert manager != null; manager.createNotificationChannel(chan); NotificationCompat.Builder notificationBuilder =

new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);

Notification notification = notificationBuilder.setOngoing(true) .setContentTitle(“App is running in background”) .setPriority(NotificationManager.IMPORTANCE_MIN) .setCategory(Notification.CATEGORY_SERVICE) .build(); startForeground(2, notification);

} @Override public int onStartCommand(Intent intent, int flags, int startId) { super.onStartCommand(intent, flags, startId); startTimer(); return START_STICKY; } @Override public void onDestroy() { super.onDestroy(); stoptimertask(); Intent broadcastIntent = new Intent(); broadcastIntent.setAction(“restartservice”); broadcastIntent.setClass(this, RestartService.class); this.sendBroadcast(broadcastIntent); } // set timer of one second repeat itself private Timer timer; private TimerTask timerTask; public void startTimer() { timer = new Timer(); timerTask = new TimerTask() { public void run() { if (flag == 0) { // get data from database

Cursor res = db.getAllData();

 

// create two list of name or pass

ArrayList<String> name = new ArrayList<String>();

 

ArrayList<String> pass = new ArrayList<String>(); while (res.moveToNext()) { // add data to list

 

Log.i(“Count”, “========= ” + printForegroundTask());

name.add(res.getString(0));

pass.add(res.getString(1)); } // if current app have password set on it

// lanuch lock screen if (name.contains(printForegroundTask())) { // flag = 1 means stop loop flag = 1; current_app = printForegroundTask(); Intent lockIntent = new Intent(mContext, LockScreen.class); lockIntent.putExtra(“name”, pass.get(name.indexOf(printForegroundTask()))); lockIntent.putExtra(“pack”, printForegroundTask()); lockIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); mContext.startActivity(lockIntent); } } if ((!printForegroundTask().equals(“com.example.simpleapplocker”)) && flag2 == 0 ) { if ((!printForegroundTask().equals(current_app))) { flag = 0; } } // if security provider is running // then dont lanuch lock screen

// only one time lock screen will appear

 

if (printForegroundTask().equals(“com.example.simpleapplocker”)) { flag = 2; } // Log.i(“Count”, “========= “+ printForegroundTask()); } }; timer.schedule(timerTask, 0, 100); // } public void stoptimertask() { if (timer != null) { timer.cancel(); timer = null; } } @Nullable @Override public IBinder onBind(Intent intent) { return null; } // get string of current app running private String printForegroundTask() { String currentApp = “NULL”; if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { UsageStatsManager usm = (UsageStatsManager) this.getSystemService(Context.USAGE_STATS_SERVICE); long time = System.currentTimeMillis(); List<UsageStats> appList = usm.queryUsageStats(UsageStatsManager.INTERVAL_DAILY, time – 1000*1000, time); if (appList != null && appList.size() > 0) { SortedMap<Long, UsageStats> mySortedMap = new TreeMap<Long, UsageStats>(); for (UsageStats usageStats : appList) { mySortedMap.put(usageStats.getLastTimeUsed(), usageStats); } if (mySortedMap != null && !mySortedMap.isEmpty()) { currentApp = mySortedMap.get(mySortedMap.lastKey()).getPackageName(); } } } else { ActivityManager am = (ActivityManager)this.getSystemService(Context.ACTIVITY_SERVICE); List<ActivityManager.RunningAppProcessInfo> tasks = am.getRunningAppProcesses(); currentApp = tasks.get(0).processName; } // Log.e(“AppLockerService”, “Current App in foreground is: ” + currentApp);

 

 

 

return currentApp; } }