我一直在尝试使用 andriod 中的 Fused Location Api 获取位置(纬度/经度)。当 wifi 和 gps 都打开时,我的代码工作正常。如果我关闭 gps,那么我不会得到任何位置更新。
我正在使用 BALANCED_POWER_ACCURACY 进行位置请求。我在清单中添加了 Access_FINE_Location 权限,并在我的 build.gradle 文件中使用了播放服务版本 9.2.1。
我正在真实设备上进行测试(三星 SM0G360H API 19 和三星 SM-G361 API 21)。两者都给出相同的结果。
谁能告诉我 Fused Location Api 是如何工作的?
如何在 gps 关闭但网络连接打开时获取位置更新?
我的代码:
public class LocationUpdateusingFused extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks,GoogleApiClient.OnConnectionFailedListener,LocationListener{
TextView txtOutputLat, txtOutputLon;
Location mLastLocation;
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
String lat, lon;
Intent batteryStatus;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fleet_layout);
txtOutputLat = (TextView) findViewById(R.id.textView);
txtOutputLon = (TextView) findViewById(R.id.textView2);
buildGoogleApiClient();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
mLocationRequest = LocationRequest.create();
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
mLocationRequest.setMaxWaitTime(5000);
mLocationRequest.setInterval(10000); // Update location every second
try {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
}
catch (SecurityException e)
{
Log.e("LocatonUpdate",e+" ");
}
if (mLastLocation != null) {
lat = String.valueOf(mLastLocation.getLatitude());
lon = String.valueOf(mLastLocation.getLongitude());
}
updateUI();
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onLocationChanged(Location location) {
lat = String.valueOf(location.getLatitude());
lon = String.valueOf(location.getLongitude());
Log.e("LocationChanged",location.getSpeed()+" "+location.getAccuracy()+" "+location.getBearing()+" "+location.getProvider()+" "+location.getAltitude()
);
updateUI();
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
buildGoogleApiClient();
}
@Override
protected void onStart() {
super.onStart();
mGoogleApiClient.connect();
}
@Override
protected void onDestroy() {
super.onDestroy();
mGoogleApiClient.disconnect();
}
void updateUI() {
txtOutputLat.setText(lat);
txtOutputLon.setText(lon);
}
synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
}