如何使用 Google Awareness API 获取天气信息？

Question

我有一个带有一个按钮的活动，我想用它在同一个活动中为我提供一些天气信息（我在按钮下显示一些 textView...）。我有这样的事情：

 ______________________
| give me weather info |  (button with onClick="addMeteoInfo")
 """"""""""""""""""""""
temperature:                (TextView)
humidity:                     (TextView)

我正在尝试使用 Google Awareness Api 获取有关我当前位置 (https://developers.google.com/awareness/android-api/get-started) 的天气信息，但我遇到了一些麻烦... 我遵循的步骤是：

1) 在我的清单文件中添加：

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

<meta-data android:name="com.google.android.awareness.API_KEY" android:value="@string/google_maps_key" /> 

<meta-data android:name="com.google.android.geo.API_KEY" android:value="@string/google_maps_key" />

其中“@string/google_maps_key”是我通过 Google Developers Console 获得然后添加到我的 strings.xml 文件资源中的字符串。

2) 添加我的 build.gradle (Module: app) 文件：

compile 'com.google.android.gms:play-services-awareness:9.6.1'

3) 在我的活动中，我有：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_nuova_battuta);
    ...
    android.content.Context context;
    GoogleApiClient client = new GoogleApiClient.Builder(context)
        .addApi(Awareness.API)
        .build();
    client.connect(); 
}

// onClick method for button "give me weather info"
public void addMeteoInfo(View view){
    richiediInfoMeteo();
}

public void richiediInfoMeteo() {
    if( !checkLocationPermission() ) {
        return;
    }

    Awareness.SnapshotApi.getWeather(mGoogleApiClient)
            .setResultCallback(new ResultCallback<WeatherResult>() {
                @Override
                public void onResult(@NonNull WeatherResult weatherResult) {

                    if (!weatherResult.getStatus().isSuccess()) {      <----HERE
                        Log.e(TAG, "Could not get weather.");

                        return;
                    }

                    Weather weather = weatherResult.getWeather();
                    Log.e("Tuts+", "Temp: " + weather.getTemperature(Weather.FAHRENHEIT));
                    Log.e("Tuts+", "Feels like: " + weather.getFeelsLikeTemperature(Weather.FAHRENHEIT));
                    Log.e("Tuts+", "Dew point: " + weather.getDewPoint(Weather.FAHRENHEIT));
                    Log.e("Tuts+", "Humidity: " + weather.getHumidity() );

                    //converto i valori interi ottenuti dall'API Google play services, in stringhe
                    String temperaturaStr = Double.toString(weather.getTemperature(Weather.CELSIUS));
                    String temperaturaPercepitaStr = Double.toString(weather.getFeelsLikeTemperature(Weather.CELSIUS));
                    String puntoRugiadaStr = Double.toString(weather.getDewPoint(Weather.CELSIUS));
                    String umiditaStr = Double.toString(weather.getHumidity());

                    //prelevo id visualizzatori di tali valori nel layout
                    mostraTemperatura = (TextView) findViewById(R.id.temperatura);
                    mostraTemperaturaPercepita = (TextView) findViewById(R.id.temperaturaPercepita);
                    mostraPuntoRugiada = (TextView) findViewById(R.id.puntoDiRugiada);
                    mostraUmidita = (TextView) findViewById(R.id.umidita);

                    // setto i visualizzatori ai valori convertiti in stringhe
                    mostraTemperatura.setText(temperaturaStr);
                    mostraTemperaturaPercepita.setText(temperaturaPercepitaStr);
                    mostraPuntoRugiada.setText(puntoRugiadaStr);
                    mostraUmidita.setText(umiditaStr);

                }
            });
}


private boolean checkLocationPermission() {
    //se permessi non disponibili allora li richiedo tramite finestra dialog
    if( !hasLocationPermission() ) {
        Log.e("Tuts+", "Does not have location permission granted");
        requestLocationPermission();
        return false;
    }
    //altrimenti se possiede già permessi
    return true;
}

private boolean hasLocationPermission() {
    return ContextCompat.checkSelfPermission( this, Manifest.permission.ACCESS_FINE_LOCATION )
            == PackageManager.PERMISSION_GRANTED;
}

private void requestLocationPermission() {
    ActivityCompat.requestPermissions(
            NuovaBattutaActivity.this,
            new String[]{ Manifest.permission.ACCESS_FINE_LOCATION },
            RICHIESTA_PERMESSO_INFO_METEO );
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    switch (requestCode) {
        case RICHIESTA_PERMESSO_INFO_METEO:
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length>0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //granted
                richiediInfoMeteo();
            } else {
                Log.e("Tuts+", "Location permission denied.");
            }
        default:
            break;
    }
}

因此，当我在 AVD 中运行我的应用程序时，我总是在控制台中获得以下消息： 无法获得天气。即方法weatherResult.getStatus().isSuccess()（在richiediInfoMeteo() 方法中）总是返回false。 我哪里错了？我该如何处理？

提前致谢。

Answer 1

尝试使用weatherResult.getStatus().getStatusCode() 函数。这会返回一个可能的错误代码，可以是looked up here。

一个可能的问题是您的设备上未启用定位服务。启用这些并重试，这可能会解决您的问题。我遇到了类似的问题（错误代码为 7503）。

Answer 2

对于从 Awareness API 获取天气信息时遇到问题的任何人，这里有一个使用 API 版本 15.0.1 的示例：

// in gradle.build
 dependencies {
     ...
     implementation 'com.google.android.gms:play-services-awareness:15.0.1'
 }


// in class GetWeatherInfoJobService
public class GetWeatherInfoJobService extends JobService {

    private static final String TAG = "GetWeatherJobService";

    public GetWeatherInfoJobService() {
    }

    @SuppressLint("MissingPermission")
    @Override
    public boolean onStartJob(JobParameters params) {

        Log.i(TAG, "Job started");

        Awareness.getSnapshotClient(this).getWeather()
                    .addOnCompleteListener((t) -> {
                        if (t.isSuccessful()){

                            Log.i(TAG, "Temperature in Celsius: " +     t.getResult().getWeather().getTemperature(Weather.CELSIUS));
                            jobFinished(params, false);
                        }
                    })
                    .addOnFailureListener(e -> {

                        Log.e(TAG, "Weather task failed");
                        e.printStackTrace();

                    });

        return true;
    }

    @Override
    public boolean onStopJob(JobParameters params) {
        Log.e(TAG, "Job stopped" );
        return false;
    }

}