android 禁止屏幕锁屏

/**
     * 屏蔽屏幕锁屏
     */
    public void power(){
    	//<uses-permission android:name="android.permission.DISABLE_KEYGUARD" />  权限
    	KeyguardManager mKeyguardManager = (KeyguardManager)getSystemService(Context.KEYGUARD_SERVICE);
		KeyguardLock mKeyguardLock = mKeyguardManager.newKeyguardLock("MainActivity");
		mKeyguardLock.disableKeyguard();
    	
    }