Android获取欧拉角

不说话，贴代码：

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:weightSum="1">

        <TextView
            android:layout_width="315dp"
            android:layout_height="wrap_content"
            android:text="New Text"
            android:id="@+id/textView"
            android:layout_gravity="center_horizontal"
            android:textSize="20dp"/>

        <TextView
            android:layout_width="315dp"
            android:layout_height="wrap_content"
            android:text="New Text"
            android:id="@+id/textView2"
            android:layout_gravity="center_horizontal"
            android:textSize="20dp"/>

        <TextView
            android:layout_width="315dp"
            android:layout_height="wrap_content"
            android:text="New Text"
            android:id="@+id/textView3"
            android:layout_gravity="center_horizontal"
            android:textSize="20dp"/>
    </LinearLayout>
</RelativeLayout>

MainActivity.java

package com.example.hailang.getorientation;

import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

public class MainActivity extends Activity {

    private SensorManager sm;
    //需要两个Sensor
    private Sensor aSensor;
    private Sensor mSensor;
    private TextView textView1, textView2, textView3;
    float[] accelerometerValues = new float[3];
    float[] magneticFieldValues = new float[3];

    private static final String TAG = "sensor";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        textView1 = (TextView)findViewById(R.id.textView);
        textView2 = (TextView)findViewById(R.id.textView2);
        textView3 = (TextView)findViewById(R.id.textView3);

        sm = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
        aSensor = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
        mSensor = sm.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);

        sm.registerListener(myListener, aSensor, SensorManager.SENSOR_DELAY_NORMAL);
        sm.registerListener(myListener, mSensor,SensorManager.SENSOR_DELAY_NORMAL);

        //更新显示数据的方法
        calculateOrientation();
    }

    //再次强调：注意activity暂停的时候释放
    public void onPause(){
        sm.unregisterListener(myListener);
        super.onPause();
    }

    final SensorEventListener myListener = new SensorEventListener() {
        public void onSensorChanged(SensorEvent sensorEvent) {
            if (sensorEvent.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD)
                magneticFieldValues = sensorEvent.values;
            if (sensorEvent.sensor.getType() == Sensor.TYPE_ACCELEROMETER)
                accelerometerValues = sensorEvent.values;
            calculateOrientation();
        }
        public void onAccuracyChanged(Sensor sensor, int accuracy) {}
    };

    private  void calculateOrientation() {
        float[] values = new float[3];
        float[] R = new float[9];
        SensorManager.getRotationMatrix(R, null, accelerometerValues, magneticFieldValues);
        SensorManager.getOrientation(R, values);

        // 要经过一次数据格式的转换，转换为度
        values[0] = (float) Math.toDegrees(values[0]);
        textView1.setText(Float.toString(values[0]));
        values[1] = (float) Math.toDegrees(values[1]);
        textView2.setText(Float.toString(values[1]));
        values[2] = (float) Math.toDegrees(values[2]);
        textView3.setText(Float.toString(values[2]));
    }

}