Question

我写了一些代码来获得一个连续跟踪的位置，但是更新仅在屏幕超时后重新启动应用程序时触发，但不是总是...

在＆＃34; Google Play服务＆＃34;中，我只使用com.google.android.gms：play-services-location：8.3.0（以减小尺寸）。

AndroidManifest.xml设置为ACCESS_FINE_LOCATION＆＃34;允许。 GPS和＆＃34; Wi-Fi＆amp;移动网络位置＆＃34;我的设备已开启。

提前感谢您的帮助。这是主要部分：

import android.location.Location;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import  comm.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks;
import  com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;

public class MainActivity extends AppCompatActivity implements
    ConnectionCallbacks, OnConnectionFailedListener, LocationListener {

private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;

private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;

protected TextView txtlat, txtlong;

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

    txtlat = (TextView)findViewById(R.id.txtlat);
    txtlong = (TextView)findViewById(R.id.txtlong);

    if (mGoogleApiClient == null) {
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
    }

    createLocationRequest();
}

protected void createLocationRequest() {
    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(10000); // 10sec
    mLocationRequest.setFastestInterval(5000); // 5sec
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}

// ----------------------------------------------------------------------
@Override
protected void onResume() {
    super.onResume();
    mGoogleApiClient.connect();
}

// ---------------------------------------------------------------------
@Override
protected void onPause() {
    super.onPause();
    if (mGoogleApiClient.isConnected()) {
        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
        mGoogleApiClient.disconnect();
    }
}

// ---------------------------------------------------------------------
@Override
public void onConnected(Bundle connectionHint) {
    Location location=LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
    if (location == null) {
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
    } else {
        displayLocation(location);
    }
}

// ---------------------------------------------------------------------
public void onLocationChanged (Location location) {
    displayLocation(location);
}

// ---------------------------------------------------------------------
@Override
protected void onStop() {
    super.onStop();
    if (mGoogleApiClient.isConnected()) {
        mGoogleApiClient.disconnect();
    }
}
}

onLocationChanged不是连续呼叫？

0 个答案: