Как заблокировать телефон андроида прогамматически?

Question

public class lock extends DeviceAdminReceiver { 

    public static class Controller extends Activity { 

     DevicePolicyManager mDPM; 
     ComponentName mDeviceAdminSample; 

     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 

      mDPM = (DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE); 
      mDeviceAdminSample = new ComponentName(Controller.this, 
       lock.class); 
      boolean active = mDPM.isAdminActive(mDeviceAdminSample); 
      if (active) 
      { 
       mDPM.lockNow(); 
      } 
     } 
    } 
} 

и я столкнулся ошибка:

1.04-11 18:25:50.918: ERROR/AndroidRuntime(860): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.lock/com.lock.lock.Controller}: java.lang.ClassNotFoundException: com.lock.lock.Controller in loader 
dalvik.system.PathClassLoader[/data/app/com.lock-1.apk] 

04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at android.os.Handler.dispatchMessage(Handler.java:99) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at android.os.Looper.loop(Looper.java:123) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at java.lang.reflect.Method.invokeNative(Native Method) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at java.lang.reflect.Method.invoke(Method.java:521) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at dalvik.system.NativeStart.main(Native Method) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860): Caused by: java.lang.ClassNotFoundException: com.lock.lock.Controller in loader dalvik.system.PathClassLoader[/data/app/com.lock-1.apk] 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at java.lang.ClassLoader.loadClass(ClassLoader.java:573) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at java.lang.ClassLoader.loadClass(ClassLoader.java:532) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577) 
04-11 18:25:50.918: ERROR/AndroidRuntime(860):  ... 11 more 

Answer 1

KeyguardManager mgr = (KeyguardManager) getContext().getSystemService(Activity.KEYGUARD_SERVICE); 
KeyguardLock lock = mgr.newKeyguardLock(KEYGUARD_SERVICE); 
lock.reenableKeyguard(); 

И вам нужны соответствующие разрешения.