import android.app.KeyguardManager;

import android.app.KeyguardManager.KeyguardLock;

import com.android.server.wm.WindowManagerService;

KeyguardManager keyguardManager = (KeyguardManager)mContext.getSystemService("keyguard");


  KeyguardLock keyguardLock = keyguardManager.newKeyguardLock(TAG);

  keyguardLock.disableKeyguard();