Android：仅显示加速度计读数，陀螺仪传感器未读数

Question

我尝试了this link的陀螺仪代码

问题是只有当传感器是加速度计时它才会显示值。 我尝试使用

显示所有传感器

List<Sensor> sensors = sm.getSensorList(Sensor.TYPE_ALL);
    for (Sensor sensor : sensors) {
        Log.d("Sensors", "" + sensor.getName());
    }

我得到了结果

12-02 15:44:20.816: D/Sensors(15757): AMI304 3-axis Magnetic Field sensor
12-02 15:44:20.816: D/Sensors(15757): ADXL345 3-axis Accelerometer
12-02 15:44:20.817: D/Sensors(15757): bh1620fvc Light Sensor
12-02 15:44:20.817: D/Sensors(15757): MPU3000  gyroscope Sensor
12-02 15:44:20.817: D/Sensors(15757): Rotation Vector Sensor
12-02 15:44:20.817: D/Sensors(15757): Gravity Sensor
12-02 15:44:20.817: D/Sensors(15757): Linear Acceleration Sensor
12-02 15:44:20.817: D/Sensors(15757): Orientation Sensor
12-02 15:44:20.817: D/Sensors(15757): Corrected Gyroscope Sensor

所以陀螺仪就在那里。那为什么加速度计只显示值？ 请帮助我

编辑：

我正在使用带有 android 4.0.4 的 HCL ME Y3 平板电脑

代码

package fortyonepost.com.ag;//Created by: DimasTheDriver on Apr/27/2010. Available at: 

http://www.41post.com/?p=3745

import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.widget.TextView;

public class AccessGyroscope extends Activity implements SensorEventListener
{
//a TextView
private TextView tv;
//the Sensor Manager
private SensorManager sManager;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    //get the TextView from the layout file
    tv = (TextView) findViewById(R.id.tv);

    //get a hook to the sensor service
    sManager = (SensorManager) getSystemService(SENSOR_SERVICE);
}

//when this Activity starts
@Override
protected void onResume() 
{
    super.onResume();
    /*register the sensor listener to listen to the gyroscope sensor, use the 
     * callbacks defined in this class, and gather the sensor information as  
     * quick as possible*/
    sManager.registerListener(this, sManager.getDefaultSensor(Sensor.TYPE_ORIENTATION),SensorManager.SENSOR_DELAY_FASTEST);
}

//When this Activity isn't visible anymore
@Override
protected void onStop() 
{
    //unregister the sensor listener
    sManager.unregisterListener(this);
    super.onStop();
}

@Override
public void onAccuracyChanged(Sensor arg0, int arg1) 
{
    //Do nothing
}

@Override
public void onSensorChanged(SensorEvent event) 
{
    //if sensor is unreliable, return void
    if (event.accuracy == SensorManager.SENSOR_STATUS_UNRELIABLE)
    {
        return;
    }

    //else it will output the Roll, Pitch and Yawn values
    tv.setText("Orientation X (Roll) :"+ Float.toString(event.values[2]) +"\n"+
               "Orientation Y (Pitch) :"+ Float.toString(event.values[1]) +"\n"+
               "Orientation Z (Yaw) :"+ Float.toString(event.values[0]));
}
}

编辑 2

我在 Galaxy 标签中尝试了相同的代码。它正在工作。但我希望它也能在这里工作。 函数onSensorChanged 只为Acceleromter 调用。它没有被任何其他传感器调用。为什么？ 我是否遗漏了平板电脑设置中的任何内容？需要做些什么来启用陀螺仪？

Answer 1

您的代码看起来不错。唯一想到的是，在 onSensorChanged 中，event.accuracy 在您的设备上总是不可靠的。试试添加 Log.d("MYTAG", "Accuracy unreliable") 看看是不是这样：

//if sensor is unreliable, return void
if (event.accuracy == SensorManager.SENSOR_STATUS_UNRELIABLE)
{
    Log.d("MYTAG", "Accuracy unreliable");
    return;
}

另请注意，Sensor.TYPE_ORIENTATION 自 API 级别 8 起已弃用。请改用 SensorManager.getOrientation() 或 Sensor.TYPE_GYROSCOPE。查看文档here。