Android相机传感器实时对焦的实现

版权声明： https://blog.csdn.net/qq_31255557/article/details/89819349

1.注册传感器

//传感器管理
SensorManager sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
sensorManager.registerListener(this,sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
                SensorManager.SENSOR_DELAY_UI);

2.相机类实现SensorEventListener,并重写onSensorChanged()方法

private float mLastX,mLastY,mLastZ;
private boolean initFirstSensor = true;

@Override
public void onSensorChanged(SensorEvent event) {
    float x = event.values[0];
    float y = event.values[1];
    float z = event.values[2];
    if (initFirstSensor) {//初始化默认进入时候的坐标
        mLastX = x;
        mLastY = y;
        mLastZ = z;
        initFirstSensor = false;
        return;
    }
    float deltaX = Math.abs(mLastX - x);
    float deltaY = Math.abs(mLastY - y);
    float deltaZ = Math.abs(mLastZ - z);

    if (deltaX > 2.5 || deltaY > 2.5 || deltaZ > 2.5) {//计算坐标偏移值
        //        获取最清晰拍摄焦距
        camera.autoFocus(new Camera.AutoFocusCallback() {
            @Override
            public void onAutoFocus(boolean success, Camera camera) {
                if (success) {
                    //移动手机自动对焦,对焦成功实现自己的逻辑
                   
                }
            }
        });
    }
    mLastX = x;
    mLastY = y;
    mLastZ = z;
}