Android 指南针不能在一些安卓设备上工作

此代码是ANDROID COMPASS应用程序。此COMPASS在某些设备中不受支持。请帮助我

private SensorManager SensorManage;
// define the compass picture that will be use
private ImageView compassimage;
// record the angle turned of the compass picture
private float DegreeStart = 0f;
TextView DegreeTV;

  compassimage = (ImageView) findViewById(R.id.compass_image);
    // TextView that will display the degree
    DegreeTV = (TextView) findViewById(R.id.DegreeTV);
    // initialize your android device sensor capabilities
    SensorManage = (SensorManager) getSystemService(SENSOR_SERVICE);
}

这是指南针的一种方法

 @Override
protected void onPause() {
    super.onPause();
    // to stop the listener and save battery
    SensorManage.unregisterListener(this);
}

@Override
protected void onResume() {
    super.onResume();
    // code for system's orientation sensor registered listeners
    SensorManage.registerListener(this, SensorManage.getDefaultSensor(Sensor.TYPE_ORIENTATION),
            SensorManager.SENSOR_DELAY_GAME);
}
@Override
public void onSensorChanged(SensorEvent event) {
    // get angle around the z-axis rotated
    float degree = Math.round(event.values[0]);
    DegreeTV.setText("Heading: " + Float.toString(degree) + " degrees");
    // rotation animation - reverse turn degree degrees
    RotateAnimation ra = new RotateAnimation(
            DegreeStart,
            -degree,
            Animation.RELATIVE_TO_SELF, 0.5f,
            Animation.RELATIVE_TO_SELF, 0.5f);
    // set the compass animation after the end of the reservation status
    ra.setFillAfter(true);
    // set how long the animation for the compass image will take place
    ra.setDuration(210);
    // Start animation of compass image
    compassimage.startAnimation(ra);
    DegreeStart = -degree;
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
    // not in use
}
}

---

访问这里，这是一个简单的android指南针。您可以跟踪它的实现。

示例代码：

@Override
public void onNewSmoothedDegreesToNorth(float degrees) {

    final RotateAnimation ra = new RotateAnimation(
            currentDegree,
            degrees,
            Animation.RELATIVE_TO_SELF, 0.5f,
            Animation.RELATIVE_TO_SELF,
            0.5f);
    ra.setDuration(210);
    ra.setFillAfter(true);

    this.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            compass.startAnimation(ra);
        }
    });

    currentDegree = degrees;    
}

否则，请访问此处了解更多详细信息

---

希望这对您有所帮助。

访问这里，这是一个简单的android指南针。您可以跟踪它的实现。

示例代码：

@Override
public void onNewSmoothedDegreesToNorth(float degrees) {

    final RotateAnimation ra = new RotateAnimation(
            currentDegree,
            degrees,
            Animation.RELATIVE_TO_SELF, 0.5f,
            Animation.RELATIVE_TO_SELF,
            0.5f);
    ra.setDuration(210);
    ra.setFillAfter(true);

    this.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            compass.startAnimation(ra);
        }
    });

    currentDegree = degrees;    
}

否则，请访问此处了解更多详细信息

---

希望这对您有所帮助。

有些设备不支持指南针，我也有同样的问题。然后我会检查罗盘是否支持以下代码

private SensorManager SensorManage ;
private Sensor sensor;

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

    this.SensorManage = (SensorManager) getSystemService(SENSOR_SERVICE);
    this.sensor = this.SensorManage.getDefaultSensor(Sensor.TYPE_ORIENTATION);
    if (this.sensor != null) {
        SensorManage.registerListener(this, SensorManage.getDefaultSensor(Sensor.TYPE_ORIENTATION), SensorManager.SENSOR_DELAY_GAME);
    } else {
        Toast.makeText(this, "Compass Not Supported", Toast.LENGTH_LONG).show();
    }
}

---

希望这会对你有所帮助

有些设备不支持指南针，我有相同的问题。然后我会检查罗盘是否支持以下代码

private SensorManager SensorManage ;
private Sensor sensor;

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

    this.SensorManage = (SensorManager) getSystemService(SENSOR_SERVICE);
    this.sensor = this.SensorManage.getDefaultSensor(Sensor.TYPE_ORIENTATION);
    if (this.sensor != null) {
        SensorManage.registerListener(this, SensorManage.getDefaultSensor(Sensor.TYPE_ORIENTATION), SensorManager.SENSOR_DELAY_GAME);
    } else {
        Toast.makeText(this, "Compass Not Supported", Toast.LENGTH_LONG).show();
    }
}

希望这会对你有所帮助