Android Open Source - lockscreen Device Admin Sample

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License

The source code is released under:

Apache License

Java Source Code

/*
* Copyright (C) 2014 Ganapathi Kamath /*from   w ww.  ja  v a2 s .c  om*/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package com.ganasoft.lockscreenWidget; 


import android.app.Activity;
import android.app.ActivityManager;
import android.app.admin.DeviceAdminInfo;
import android.app.admin.DeviceAdminReceiver;
import android.app.admin.DevicePolicyManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;



public class DeviceAdminSample extends DeviceAdminReceiver {
  private static final String TAG = "LockScreen Admin Receiver";

   @Override
   public void onEnabled(Context context, Intent intent) {
     Log.i(TAG, "Sample Device Admin: enabled");
   }
   @Override
   public void onDisabled(Context context, Intent intent) {
     Log.i(TAG, "Sample Device Admin: disabled");
   }
  // An empty class that is a place holder for being the device admin receiver

  // An Inner Class put here simple for keeping things together

  public static class Controller extends Activity {
    public static DevicePolicyManager mDPM;
    public static ActivityManager mAM;
    public static ComponentName mDeviceAdminSample;
    final static int ACTIVATION_REQUEST = 1;
    private static final String TAG = "LockScreen Controller Activity";
    
     
    @Override
    protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      Log.i(TAG,"controller created");
      mDPM = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
      mAM = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
      mDeviceAdminSample = new ComponentName(Controller.this, DeviceAdminSample.class);
    
      
      boolean active=mDPM.isAdminActive(mDeviceAdminSample); 
      if (!active){
        Log.i(TAG,"getting admin access first");
        get_admin();
        //mDPM.lockNow();
      }else{
        //mDPM.lockNow();
      }    
      // kill my own pid
      //android.os.Process.killProcess(android.os.Process.myPid());
      finish();
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode,
        Intent data) {
      switch (requestCode) {
      case ACTIVATION_REQUEST:
        if (resultCode == Activity.RESULT_OK) {
          Log.i(TAG, "Administration enabled!");
        } else {
          Log.i(TAG, "Administration enable FAILED!");
        }
        return;
      }
      super.onActivityResult(requestCode, resultCode, data);
    }

    public void get_admin(){
      Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
      intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN,
          mDeviceAdminSample);
      intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION,
          "to lock screen");
      intent.putExtra("force-locked",
          DeviceAdminInfo.USES_POLICY_FORCE_LOCK);

      startActivityForResult(intent, 1);
    }

 
  }
}

Java Source Code List

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