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
