java - 三星 xcover 3 TYPE_GYROSCOPE 不工作

Question

当我查看 xcover 3 中的规范时，他们写道该模型具有陀螺仪。

我尝试编写代码(我使用 android studio)来查看它是如何工作的，但它没有向我显示此模型或 android 虚拟设备上的传感器。

public class Menu extends AppCompatActivity implements SensorEventListener{




boolean running = false;
SensorManager sensorManager; 
ToggleButton btn; 
TextView textView;
TextView x1;
TextView y1;
TextView z1;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_menu);

    btn = (ToggleButton) findViewById(R.id.toggleButton);
    sensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);

  btn.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
      @Override
      public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
          if(isChecked){

              running = true;

          }


            else{

           running = false;


      }}
  });
}

@Override
protected void onResume() {
    super.onResume();
    Sensor countsensor = sensorManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE);
    if(countsensor != null){
        sensorManager.registerListener(this,countsensor,SensorManager.SENSOR_DELAY_FASTEST);
   }
    else{

       Toast.makeText(this, "Brak sensora",Toast.LENGTH_SHORT).show();
    }
}

@Override
public void onSensorChanged(SensorEvent event) {

    if(running){


        x1 =(TextView) findViewById(R.id.textViewX1);
        y1 =(TextView) findViewById(R.id.textViewY1);
        z1 =(TextView) findViewById(R.id.textViewZ1);

        x1.setText(String.valueOf(event.values[0]));
        y1.setText(String.valueOf(event.values[1]));
        z1.setText(String.valueOf(event.values[2]));



    }
}

@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}}

在这部分中，countsensor 返回 null。

     @Override
        protected void onResume() {
        super.onResume();
        Sensor countsensor = sensorManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE);
        if(countsensor != null){ 
 sensorManager.registerListener(this,countsensor,SensorManager.SENSOR_DELAY_FASEST);
       }
        else{

           Toast.makeText(this, "Brak sensora",Toast.LENGTH_SHORT).show();
        }
    }

当我将 Sensor.TYPE_GYROSCOPE 更改为 Sensor.TYPE_ACCELEROMETER 时，一切正常。我很困惑为什么它不起作用。

Answer 1

根据这个网站，这个设备没有陀螺仪:

https://www.gsmarena.com/samsung_galaxy_xcover_3-6990.php

您可以使用以下几行代码简单地检查您的设备中是否存在陀螺仪:

boolean gyro;

gyro = sensorMgr.registerListener(this,sensorMgr.getDefaultSensor(Sensor.TYPE_GYROSCOPE);

if(gyro) 
{
//code to execute if gyro is present
}