Disable Auto lock in android

import android.app.Activity;

       import android.app.KeyguardManager;

       import android.app.KeyguardManager.KeyguardLock;

       import android.content.Context;

       import android.os.PowerManager;

       import android.view.WindowManager;

       public class AutoLock extends Activity

       {

              KeyguardManager keyguardManager;

              KeyguardLock lock;

              public void Disable_AutoLock()

              {

                  getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

                keyguardManager = (KeyguardManager)

                                  getSystemService(Activity.KEYGUARD_SERVICE);

                     lock = keyguardManager.newKeyguardLock(KEYGUARD_SERVICE);

                     lock.disableKeyguard();

              }

              public void Enable_AutoLock()

              {

                     lock.reenableKeyguard();

              }

       }

Permission:
<uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>