java - Android 应用程序中的旋转 vector 传感器不适用于我的 Moto G

Question

所以我有一个用 Android Eclipse 编写的应用程序，它在固定标记上显示 map ，然后使用旋转 vector 传感器根据旋转变化四处移动。当我在我的设备上运行它时，手机倾斜时屏幕不会移动。我尝试了一切，甚至让我的教授看了看。他找不到代码中的问题。最后我们在他的设备上运行它并且运行完美!我有一个 Moto G，我想知道是否有人知道为什么这段代码适用于其他 Android 设备但不适用于我的设备。以下是该项目的代码。

package com.example.flymap_awc;

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.view.Menu;
import android.util.Log;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

public class MainActivity extends Activity implements SensorEventListener {
  static final LatLng HAMBURG = new LatLng(53.558, 9.927);
  static final LatLng KIEL = new LatLng(53.551, 9.993);
  private GoogleMap map;

  private SensorManager mSensorManager;

  private double oldx = 0, oldy=0, oldz = 0;


  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map))
        .getMap();
    Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG)
        .title("Hamburg"));
    Marker kiel = map.addMarker(new MarkerOptions()
        .position(KIEL)
        .title("Kiel")
        .snippet("Kiel is cool")
        .icon(BitmapDescriptorFactory
            .fromResource(R.drawable.ic_launcher)));

    // Move the camera instantly to hamburg with a zoom of 15.
    map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));

    // Zoom in, animating the camera.
    map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);

    mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }

  @Override
    public void onAccuracyChanged(Sensor arg0, int arg1) {
        // TODO Auto-generated method stub


    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        if(event.sensor.getType() == Sensor.TYPE_ROTATION_VECTOR)
        {

            if(oldx==0 && oldy ==0 && oldz ==0 ){
            // if this is the first run (oldx/y/z=0, get the initial orientation
                oldx = event.values[0];
                oldy = event.values[1];
                oldz =event.values[2];

               //set oldx to event.values[0], etc.
            }

            // get change in rotation amount store as dx,dy,dz
            double dx = oldx - event.values[0];
            double dy = oldy - event.values[1];
            double dz = oldz - event.values[2];
            double dTotal = Math.abs(dx) + Math.abs(dy) + Math.abs(dz);
            if (dTotal > 0.05)
            {
                double lat = map.getCameraPosition().target.latitude;
                double lng = map.getCameraPosition().target.longitude;

                lat +=dx;
                lng -=dy;

                Log.println(100,"100","lat, lng, dx, dy" + lat + lng+dx+dy);

                LatLng loc = new LatLng(lat, lng);
                map.moveCamera(CameraUpdateFactory.newLatLng(loc));

                oldx = event.values[0];
                oldy = event.values[1];
                oldz = event.values[2];

            }

            //filter out noise where Math.abs(dx) + Math.abs(dy)+ Math.abs(dz) > 0.05
            // get current lat lng
            //that my map camera is point at (or targeting)


            // add to the lat and lng based on dx dy
            //may want to compensate for zoom inverse proportionally

            //may have to do lng -=dy to move intuitively
            //move camera using camerupdatefactory to the new LatLng(lat,lng)

            // update old oldy oldz

        }
    }







protected void onResume(){
        super.onResume();
        // register this class as a listener for the orientation sensor
        mSensorManager.registerListener(this, mSensorManager.getDefaultSensor(Sensor.TYPE_ROTATION_VECTOR),
                SensorManager.SENSOR_DELAY_NORMAL);

    }
    protected void onPause(){
        super.onPause();
        //unregister listener
        mSensorManager.unregisterListener(this);

    }
} 

这是 list 代码

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.flymap_awc"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="19"
        android:targetSdkVersion="19" />

 <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true"/>

    <uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<!-- The following two permissions are not required to use
     Google Maps Android API v2, but are recommended. -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme"
         >

        <meta-data
    android:name="com.google.android.gms.version"
    android:value="@integer/google_play_services_version" />

        <activity
            android:name="com.example.flymap_awc.MainActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>


    <meta-data
    android:name="com.google.android.maps.v2.API_KEY"
    android:value="AIzaSyDC4pK6_RmiSsDoWFAEmTUO2DRynTR0lik"/>
    </application>

</manifest>

Answer 1

ROTATION_VECTOR需要陀螺仪才能工作，这就是原因。

Underlying base sensor(s): Accelerometer, Gyroscope AND Magnetometer

我的一个应用程序也因此在 Moto G 上停止工作。