android – 将位置更新发送到IntentService

位置更新如何直接发送到Intent服务？以下方法不起作用. OnConnected函数被调用,但是在服务中从未接收到该意图：

...
    private PendingIntent getLocationPendingIntent(boolean shouldCreate) {
        Intent broadcast = new Intent(m_context,LocationUpdateService.class);
        int flags = shouldCreate ? 0 : PendingIntent.FLAG_NO_CREATE;
        return PendingIntent.getService(m_context,broadcast,flags);
    }



    @Override
    public void onConnected(Bundle arg0) {
        PendingIntent locationPendingIntent = getLocationPendingIntent(true);        
        LocationRequest locationRequest = new LocationRequest();
        locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        locationRequest.setInterval(LOCATION_UPDATE_INTERVAL);
        locationRequest.setFastestInterval(LOCATION_FASTEST_UPDATE_INTERVAL);
        LocationServices.FusedLocationApi.requestLocationUpdates(m_googleapiclient,locationRequest,locationPendingIntent);
}
...

意向服务：

import android.app.IntentService;
import android.content.Intent;
import android.util.Log;

public class LocationUpdateService extends IntentService {

    public LocationUpdateService() {
        super(LocationUpdateService.class.getName());
    }


    @Override
    public int onStartCommand(Intent intent,int flags,int startID) {
        super.onStartCommand(intent,flags,startID);
        Log.d("LocationUpdateService","Location received");
        return START_REDELIVER_INTENT;
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        Log.d("LocationUpdateService","Intent received");

    }   
}

清单文件：

...
<service  android:name=".LocationUpdateService" />
...

解决方法

这里是基于代码找到的代码,成功地将IntentService设置为用于位置更新的PendingIntent中包含的Intent的接收者.

首先,IntentService：

import android.app.IntentService;
import android.content.Intent;
import android.location.Location;
import android.util.Log;
import com.google.android.gms.location.FusedLocationProviderApi;
import com.google.android.gms.location.LocationResult;

public class LocationUpdateService extends IntentService {

    private final String TAG = "LocationUpdateService";
    Location location;

    public LocationUpdateService() {

        super("LocationUpdateService");
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        if (LocationResult.hasResult(intent)) {
            LocationResult locationResult = LocationResult.extractResult(intent);
            Location location = locationResult.getLastLocation();
            if (location != null) {
                 Log.d("locationtesting","accuracy: " + location.getAccuracy() + " lat: " + location.getLatitude() + " lon: " + location.getLongitude());
            }
        }
    }
}

并且这里是活动代码,注册用于发送到IntentService的PendingIntent的位置更新：

import android.app.PendingIntent;
import android.os.Bundle;
import android.content.Intent;
import android.app.Activity;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.Googleapiclient;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;

public class MainActivity extends Activity implements
        Googleapiclient.ConnectionCallbacks,Googleapiclient.OnConnectionFailedListener {

    LocationRequest mLocationRequest;
    Googleapiclient mGoogleapiclient;
    PendingIntent mRequestLocationUpdatesPendingIntent;

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

        buildGoogleapiclient();
        mGoogleapiclient.connect();
    }

    @Override
    protected void onPause(){
        super.onPause();
        if (mGoogleapiclient != null) {
            LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleapiclient,mRequestLocationUpdatesPendingIntent);
        }
    }

    protected synchronized void buildGoogleapiclient() {
        Toast.makeText(this,"buildGoogleapiclient",Toast.LENGTH_SHORT).show();
        mGoogleapiclient = new Googleapiclient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
    }

    @Override
    public void onConnected(Bundle bundle) {
        Toast.makeText(this,"onConnected",Toast.LENGTH_SHORT).show();

        mLocationRequest = new LocationRequest();
        mLocationRequest.setInterval(10);
        mLocationRequest.setFastestInterval(10);
        mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
        //mLocationRequest.setSmallestdisplacement(0.1F);

        // create the Intent to use WebViewActivity to handle results
        Intent mRequestLocationUpdatesIntent = new Intent(this,LocationUpdateService.class);

        // create a PendingIntent
        mRequestLocationUpdatesPendingIntent = PendingIntent.getService(getApplicationContext(),mRequestLocationUpdatesIntent,PendingIntent.FLAG_UPDATE_CURRENT);

        // request location updates
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleapiclient,mLocationRequest,mRequestLocationUpdatesPendingIntent);
    }

    @Override
    public void onConnectionSuspended(int i) {
        Toast.makeText(this,"onConnectionSuspended",Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        Toast.makeText(this,"onConnectionFailed",Toast.LENGTH_SHORT).show();
    }
}

结果日志：

D/locationtesting﹕ accuracy: 10.0 lat: 37.779702 lon: -122.3931595
 D/locationtesting﹕ accuracy: 10.0 lat: 37.7797023 lon: -122.3931594
 D/locationtesting﹕ accuracy: 10.0 lat: 37.7797022 lon: -122.3931596
 D/locationtesting﹕ accuracy: 10.0 lat: 37.7797021 lon: -122.3931597
 D/locationtesting﹕ accuracy: 10.0 lat: 37.7797021 lon: -122.3931596
 D/locationtesting﹕ accuracy: 10.0 lat: 37.7797019 lon: -122.3931597
 D/locationtesting﹕ accuracy: 10.0 lat: 37.7797019 lon: -122.3931597