Question

我已经创建了方向检测功能，但它无法正常工作，我需要在方向向左或向右改变时收到通知。我使用OrientationEventListener专门做了这个，因为我不希望因为原因而使用OnConfigurationChanged。

int orentation; // 0 - Portariat; 1 - Right; 2 - Left
int new_orentation;

orentation = 0;
new_orentation = 0;

myOrientationEventListener = new OrientationEventListener(this, SensorManager.SENSOR_DELAY_NORMAL){

        @Override
        public void onOrientationChanged(int arg0) {

            orent.setText("Orientation: " + String.valueOf(arg0));


            switch (orentation) {
            case 0:

                if (arg0 > 60)
                    new_orentation = 1;

                else if (arg0 < 300) 
                    new_orentation = 2;

                break;
            case 1:

                if (arg0 < 30)
                    new_orentation = 0;

                else if (arg0 < 300) 
                    new_orentation = 2;

                break;
            case 2:

                if (arg0 > 330)
                    new_orentation = 0;

                else if (arg0 > 300) 
                    new_orentation = 1;

                break;

            default:
                break;
            }

            if (orentation!=new_orentation) 
            {
                switch (new_orentation) {
                case 0:
                    Toast.makeText(getApplicationContext(), "Normal", Toast.LENGTH_SHORT).show();
                    break;
                case 1:
                    Toast.makeText(getApplicationContext(), "Right", Toast.LENGTH_SHORT).show();
                    break;
                case 2:
                    Toast.makeText(getApplicationContext(), "Left", Toast.LENGTH_SHORT).show();
                    break;

                default:
                    break;
                }

                orentation = new_orentation; 
            }



        }};

Answer 1

似乎param没有声明差异而是绝对位置。它似乎应该是你正在使用的开关/案例是不合适的。也许更喜欢的东西（相应地调整你想要如何准确定义每个案例）：

if(arg0 <= 90){
  new_orentation = 1;
}
else if(arg0 <=180){
  //this is reversePortrait
  new_orentation = 0;
}
else if(arg0 <= 270){
  new_orentation = 2;
}
else{
  new_orentation = 0;
}

Android OrientationEventListener未显示正确的模式

1 个答案: