在我的Android可穿戴设备中获取GPS位置

Question

我正在为购买并在中国运行的智能手表开发Android应用程序。

我的目标是获取设备的GPS位置并跟踪其移动，但我似乎无法找到如何使其工作。

目前，我正在开发API 21和我使用谷歌的下库播放服务，因为它是在中国使用的穿戴式的一个：com.google.android.gms:play-services-wearable:7.8.87

，我使用的代码是以下：

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_on_route); 

    locationRequest = LocationRequest.create() 
      .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY) 
      .setInterval(UPDATE_INTERVAL_MS) 
      .setFastestInterval(FASTEST_INTERVAL_MS); 

    mGoogleApiClient = new GoogleApiClient.Builder(this) 
      .addApi(LocationServices.API) 
      .addApi(Wearable.API) // used for data layer API 
      .addConnectionCallbacks(this) 
      .addOnConnectionFailedListener(this) 
      .build(); 

    startTravelTime = System.currentTimeMillis(); 

    if (!hasGps()) { 
     Log.d(TAG, "This hardware doesn't have GPS."); 
    } 
} 

private boolean hasGps() { 
    return getPackageManager().hasSystemFeature(PackageManager.FEATURE_LOCATION_GPS); 
} 

@Override 
protected void onStart() { 
    super.onStart(); 
    mGoogleApiClient.connect(); 
    Log.i("Connected!!!", "WERE CONNECTED"); 
} 

@Override 
protected void onStop() { 
    super.onStop(); 
    if (mGoogleApiClient.isConnected()) { 
     LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this); 
    } 
    mGoogleApiClient.disconnect(); 
    System.out.println("onstop"); 
} 

@Override 
protected void onResume() { 
    super.onResume(); 
    if(!mGoogleApiClient.isConnected()) { 
     mGoogleApiClient.connect(); 
    } 
} 

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

@Override 
public void onConnected(Bundle bundle) { 
    LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, locationRequest, this).setResultCallback(new ResultCallback<Status>() { 
       @Override 
       public void onResult(Status status) { 
        if (status.getStatus().isSuccess()) { 
         if (Log.isLoggable(TAG, Log.DEBUG)) { 
          Log.d(TAG, "Successfully requested location updates"); 
         } 
        } else { 
         Log.e(TAG, 
           "Failed in requesting location updates, " 
             + "status code: " 
             + status.getStatusCode() 
             + ", message: " 
             + status.getStatusMessage()); 
        } 
       } 
      }); 
} 

@Override 
public void onLocationChanged(Location location){ 

    // Display the latitude and longitude in the UI 
    mTextView = (TextView) findViewById(R.id.location); 
    mTextView.setText("Latitude: " + String.valueOf(location.getLatitude()) + "\nLongitude: " + String.valueOf(location.getLongitude())); 
    Toast.makeText(getBaseContext(), "Latitude: " + String.valueOf(location.getLatitude()) + "\nLongitude: " + String.valueOf(location.getLongitude()), Toast.LENGTH_LONG).show(); 
} 

我希望有人能帮助我解决这个:)

Answer 1

对于位置对中国的可穿戴式设备工作，你应该使用Fused Location Provider API，并确保在您的build.gradle文件中的以下行：

dependencies { 
    ... 
    compile 'com.google.android.gms:play-services-location:10.2.0' 
} 

除了上面你还需要添加：

dependencies { 
    ... 
    compile 'com.google.android.gms:play-services-wearable:10.2.0' 
} 

更多细节可以在谷歌的指导Creating Android Wear Apps for China