Android GPS获取当前位置

Question

我开发了一个简单的 Android 应用程序，在这个简单的应用程序中，我想获取 GPS 纬度和经度数据，它在我的模拟器中可以正常工作，但是当我安装在真正的 Android 设备上时，它就无法工作了。请帮我解决这个问题，下面是我的代码。提前致谢

public class getLocation extends AppCompatActivity {

private Button btnGetLocation;
private TextView textGPS;
private LocationManager locationManager;
private LocationListener locationListener;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_get_location);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);


    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    btnGetLocation = (Button) findViewById(R.id.btnGetLocation);
    textGPS = (TextView) findViewById(R.id.textViewGps);
    locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

    locationListener = new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {
            textGPS.setText("lat: "+location.getLatitude()+" long: "+location.getLongitude());

        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {

        }

        @Override
        public void onProviderEnabled(String provider) {

        }

        @Override
        public void onProviderDisabled(String provider) {
            startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));

        }
    };

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            requestPermissions(new String[]{
                    Manifest.permission.ACCESS_FINE_LOCATION,
                    Manifest.permission.ACCESS_COARSE_LOCATION,
                    Manifest.permission.INTERNET
            },10);
            return;
        }
    }else{
        configureButton();
    }

}

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {

    switch (requestCode){
        case 10:
            if(grantResults.length >0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
                configureButton();
            return;
    }
}

private void configureButton() {

    btnGetLocation.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            locationManager.requestLocationUpdates("gps", 0, 0, locationListener);
        }
    });
}

}

模拟器的屏幕截图:

手机屏幕截图:

Answer 1

您只请求 GPS...您的设备需要与卫星取得联系!在太空!走到外面测试一下!这是测试仅使用 GPS 的代码时的常见问题，它在室内效果不佳。

另外，你不应该使用硬编码的“gps”，你应该使用:

locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);

至于使用 FusedLocationProviderAPI，您会损失一些准确性，但它确实提供了大大改进的电池性能，因为它严重依赖网络位置，并且仅在绝对必要时才使用 GPS。有关如何使用它的完整示例，请参见此处: https://stackoverflow.com/a/30255219/4409409