安卓控制手机点灯

1.手机摄像头权限获取

 <!-- 摄像头、手电筒 -->
        <uses-permission android:name="android.permission.CAMERA"/>

然后设计点击按钮

   public void btn_open(View view){//默认初始为关闭状态，点击打开关闭

        // TODO Auto-generated method stub/ TODO Auto-generated method stub
        if(!isopent) {
            camera = Camera.open();
            android.hardware.Camera.Parameters params = camera.getParameters();
            params.setFlashMode(android.hardware.Camera.Parameters.FLASH_MODE_TORCH);
            camera.setParameters(params);
            camera.startPreview(); // 开始亮灯
             isopent = true;
        }
        else{
            camera.stopPreview(); // 关掉亮灯
            camera.release(); // 关掉照相机\
            isopent = false;
        }
    }