android disables lock screensaver holding constant bright of sample code

When video is playing, mediaplayer

mMediaPlayer. setScreenOnWhilePlaying (true); It has been set up, there is no problem with native android and no problem with defy, there is a problem with 1 to 3 star galaxy, I don't know what 3 star they changed. Type 1 words set to play video screen not automatically. But it was a problem on three. I'll have to try again. There are two ways to set the standard.

As follows:

1. getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
2.
 onResume   enable 
  wakeLock = ((PowerManager) getSystemService(POWER_SERVICE))
    .newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK
      | PowerManager.ON_AFTER_RELEASE, TAG);
  wakeLock.acquire();
onPause  disable 
  if (wakeLock != null) {
   wakeLock.release();
  }

Neither of these methods works in galaxy.

The third method:

  mContentResolver = getContentResolver();
  setLockPatternEnabled(false);
 public void setLockPatternEnabled(boolean enabled) {
  setBoolean(android.provider.Settings.System.LOCK_PATTERN_ENABLED,
    enabled);
 }
 private void setBoolean(String systemSettingKey, boolean enabled) {
  android.provider.Settings.System.putInt(mContentResolver,
    systemSettingKey, enabled ? 1 : 0);
 }
 permissions   <uses-permission android:name="android.permission.WRITE_SETTINGS" />

This will disable the lock screen.