Question

我正在尝试获取用户的当前位置。但为了做到这一点，我需要在我的代码中启用Google Play服务。因此，在我能够执行更多代码（例如查找用户的当前位置）之前，我先在代码中检查checkPlayService()方法。我的代码主要遵循this教程。

问题在于每次我的代码都会返回Device is not supported.吐司，这可能意味着我没有在我的Android工作室中正确设置Google Play服务，或者我的代码可能有问题？我知道这方面已经有很多问题，但似乎没有任何答案可以解决这个问题，至少对于我看到的问题。请帮忙，我已经尝试了所有的事情。

我在AndroidManifest中有这些行：

<meta-data
    android:name="com.google.android.geo.API_KEY"
    android:value="replaced_my_actual_key_with_this_statement" />
<meta-data
    android:name="com.google.android.gms.version"
    android:value="@integer/google_play_services_version" />

我的依赖关系：

compile 'com.google.android.gms:play-services-places:11.0.4'
compile 'com.google.android.gms:play-services-location:11.0.4'
compile 'com.google.android.gms:play-services:11.0.4'

我的SDK安装看起来像

代码：

public class FindLocation extends AppCompatActivity implements
        GoogleApiClient.OnConnectionFailedListener,
        GoogleApiClient.ConnectionCallbacks {

    private GoogleApiClient mGoogleApiClient;
    private TextView selectLocation;
    private static final int PERMISSION_REQUEST_TO_ACCESS_LOCATION = 1;

    private LocationManager lm;
    private boolean gps_enabled = false;
    private boolean network_enabled = false;

    private Location mLastLocation;
    private final static int PLAY_SERVICES_RESOLUTION_REQUEST = 1000;




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

        lm = (LocationManager)this.getSystemService(Context.LOCATION_SERVICE);

        selectLocation = (TextView) findViewById(R.id.selectLocation);

        if (checkPlayServices()) {

            // Building the GoogleApi client
            buildGoogleApiClient();
        }

        getCurrentLocation();

    }

    protected synchronized void buildGoogleApiClient() {
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API).build();
    }

    @Override
    protected void onStart() {
        super.onStart();
        if (mGoogleApiClient != null) {
            mGoogleApiClient.connect();
        }
    }

    @Override
    protected void onResume() {
        super.onResume();

        checkPlayServices();
    }

    private void getCurrentLocation() {
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            Log.i("THIS", "Permission NOT Granted!");

            ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.ACCESS_FINE_LOCATION},PERMISSION_REQUEST_TO_ACCESS_LOCATION);
            return;
        }
        Log.i("THIS", "Permission GRANTED!");

        isLocationEnabled();

        displayLocation();
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        switch (requestCode) {
            case PERMISSION_REQUEST_TO_ACCESS_LOCATION: {
                Log.i("THIS", "Permission Deciding...");
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    getCurrentLocation();
                } else {
                    Log.i("THIS", "Permission DENIED!");
                    // Permission denied, boo!
                    // Disable the functionality that depends on this permission.
                }
                return;
            }

            // Add further 'case' lines to check for other permissions this app might request.
        }
    }

    public void isLocationEnabled() {
        try {
            gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
        } catch(Exception ex) {}

        try {
            network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
        } catch(Exception ex) {}

        if(!gps_enabled && !network_enabled) {
            // notify user
            AlertDialog.Builder dialog = new AlertDialog.Builder(this);
            dialog.setMessage("Location Service not enabled!");
            dialog.setPositiveButton("Enable", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface paramDialogInterface, int paramInt) {
                    // TODO Auto-generated method stub
                    Intent myIntent = new Intent( Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                    startActivity(myIntent);
                    //get gps
                }
            });
            dialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface paramDialogInterface, int paramInt) {
                    // TODO Auto-generated method stub

                }
            });
            dialog.show();
        }
    }

    private boolean checkPlayServices() {
        GoogleApiAvailability googleAPI = GoogleApiAvailability.getInstance();
        int result = googleAPI.isGooglePlayServicesAvailable(this);
        if(result != ConnectionResult.SUCCESS) {
            if(googleAPI.isUserResolvableError(result)) {
                googleAPI.getErrorDialog(this, result, PLAY_SERVICES_RESOLUTION_REQUEST).show();
            }

            return false;
        } else {
            Toast.makeText(getApplicationContext(),
                    "This device is not supported.", Toast.LENGTH_LONG)
                    .show();
            finish();
        }

        return true;
    }

    private void displayLocation() {

        mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);    // ALLOWED

        if (mLastLocation != null) {
            double latitude = mLastLocation.getLatitude();
            double longitude = mLastLocation.getLongitude();

            selectLocation.setText(latitude + ", " + longitude);

        } else {

            selectLocation.setText("(Couldn't get the location. Make sure location is enabled on the device)");
        }
    }

    @Override
    public void onConnected(@Nullable Bundle bundle) {
        displayLocation();
    }

    @Override
    public void onConnectionSuspended(int i) {
        mGoogleApiClient.connect();
    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
        Log.e("THIS", "GoogleApiClient connection failed: " + connectionResult.getErrorMessage());
    }
}

Answer 1

尝试this回答。

什么时候想要你的位置。使用以下代码检索位置并将其显示在textview

mLocationResolver.resolveLocation(this, new LocationResolver.OnLocationResolved() {
            @Override
            public void onLocationResolved(Location location) {
                // Do what ever you want
              textview.setText("latitude : " +location.getLatitude() + ", Longitude : "+ location.getLongitude() + "");
            }
        });

Answer 2

我找到了解决方案。这实际上只是一个愚蠢的错误。

我复制了我所指的教程中的代码，却没有意识到checkPlayServices()方法下的if else语句中存在轻微的错误（至少对我的应用程序而言）。更正后的代码如下所示。

private boolean checkPlayServices() {
        GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance();
        int resultCode = apiAvailability.isGooglePlayServicesAvailable(this);
        if (resultCode != ConnectionResult.SUCCESS) {
            if (apiAvailability.isUserResolvableError(resultCode)) {
                apiAvailability.getErrorDialog(this, resultCode, PLAY_SERVICES_RESOLUTION_REQUEST)
                        .show();
                Log.i("THISS", "HII_1");
            } else {
                Toast.makeText(this, "Device Not Supported", Toast.LENGTH_SHORT).show();
                //Log.i(TAG, "This device is not supported.");
                finish();
            }
            return false;
        }
        return true;
    }

未找到Google Play服务/错误

2 个答案: