如何将温度值（从服务）检索到 AppWidgetProvider

Posted 2023-04-15

【中文标题】如何将温度值（从服务）检索到 AppWidgetProvider

【英文标题】：How to retrieve the temperature value (from service) to AppWidgetProvider

【发布时间】：2016-05-24 11:05:14

【问题描述】：

嗨，我是 android 小部件的新手，我搜索了示例以检索 appwidget 提供的温度（它在服务中），但我对此并不清楚。因此，我启动一项服务以获取温度详细信息。

它是我的服务（这里我得到了临时值）需要知道我想如何将此详细信息传递给 AppWidgetProvider

class MainService extends Service 
    private SharedPreferences sharedPref;
    private static final String Sync_My_Settings = "SyncSettings";
    private Button tempbut;
    public static ArrayList<HashMap<String, String>> mDataFetchList;

    private int appWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;

    @Override
    public void onCreate() 
        super.onCreate();

        sharedPref = MainService.this.getSharedPreferences(Sync_My_Settings, Context.MODE_PRIVATE);

        setCurrentLocation();

        Log.e("edgar","Started Service");
    

    @Nullable
    @Override
    public IBinder onBind(Intent intent) 
        return null;
    

    public void setCurrentLocation() 
        String myLat= "myLat",myLong="myLong";
        loc1 = new GeoLocationUtil(this).getCurrentLocation(this);
        if (loc1 != null) 
            SharedPreferences.Editor editor = sharedPref.edit();
            editor.putString(myLat,  String.valueOf(loc1.getLatitude()));
            editor.putString(myLong, String.valueOf(loc1.getLongitude()));
            editor.commit();
            System.out.println("PWF Latitude = " + String.valueOf(loc1.getLatitude()) + "Longitude = " + String.valueOf(loc1.getLongitude()));

            JSONWeatherTask task = new JSONWeatherTask();
            task.execute("", sharedPref.getString(myLat, "0"), sharedPref.getString(myLong, "0"));
            try 
                int myTemp = (int) task.get().temperature.getTemp();
                String City =task.get().location.getCity();

                //System.out.println("SWF HH display fd=" + result);
                mDataFetchList = new ArrayList<HashMap<String, String>>();
                HashMap<String, String> map = new HashMap<String, String>();
                map.put("Temp", City);
                mDataFetchList.add(map);
                Intent widgetUpdateIntent = new Intent();
                widgetUpdateIntent.setAction(MyProvider.DATA_FETCHED);
                widgetUpdateIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
                sendBroadcast(widgetUpdateIntent);
             catch (InterruptedException | ExecutionException e) 
                e.printStackTrace();
            
         else 
            Toast.makeText(this, "Error", Toast.LENGTH_SHORT).show();
        
    

    private class JSONWeatherTask extends AsyncTask<String, Void, Weather> 
        @Override
        protected Weather doInBackground(String... params) 
            Weather weather = new Weather();
            String data = ( (new WeatherHttpClient()).getWeatherData(params[0], params[1], params[2]));
            try 
                weather = JSONWeatherParser.getWeather(data);

                // Let's retrieve the icon
                weather.iconData = ( (new WeatherHttpClient()).getImage(weather.currentCondition.getIcon()));
             catch (JSONException e) 
                e.printStackTrace();
            
            return weather;
        

        @Override
        protected void onPostExecute(Weather weather)          
            super.onPostExecute(weather);
            if (weather.iconData != null && weather.iconData.length > 0) 
                Bitmap img = BitmapFactory.decodeByteArray(weather.iconData, 0, weather.iconData.length);
                imgView.setImageBitmap(img);
            
            String City =weather.location.getCity();
            String Cloudy =(weather.currentCondition.getCondition() + "(" + weather.currentCondition.getDescr() + ")");
            String temper ="" + weather.temperature.getTemp()  + "\u00B0C";
        
    

还有我的 AppWidgetProvide

public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) 
    final int count = appWidgetIds.length;

    for (int i = 0; i < count; i++) 
        final Intent intentt = new Intent(context, MainService.class);
        intentt.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetIds[i]);
        context.startService(intentt);
    
    super.onUpdate(context, appWidgetManager, appWidgetIds);


@Override
public void onEnabled(Context context) 
    // TODO Auto-generated method stub
    super.onEnabled(context);


@Override
public void onDisabled(Context context) 
    // TODO Auto-generated method stub
    super.onDisabled(context);


private RemoteViews updateWidgetListView(Context context, int appWidgetId) 
    // which layout to show on widget
    RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.simple_widgett);

    // RemoteViews Service needed to provide adapter for ListView
    Intent svcIntent = new Intent(context, MainService.class);

    // passing app widget id to that RemoteViews Service
    svcIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);

    // setting a unique Uri to the intent
    if (MainService.mDataFetchList != null) 
        svcIntent.putExtra("data", MainService.mDataFetchList);
        remoteViews.setTextViewText(R.id.btn1, "Temp");
    
    remoteViews.setRemoteAdapter(appWidgetId, R.id.btn1, svcIntent);
    remoteViews.setTextViewText(R.id.am, am.format(new Date()));
    Intent toastIntent = new Intent(context, MyProvider.class);
    toastIntent.setAction(MyProvider.TOAST_ACTION);
    toastIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
    PendingIntent toastPendingIntent = PendingIntent.getBroadcast(context, 0, toastIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    remoteViews.setPendingIntentTemplate(R.id.date, toastPendingIntent);
    return remoteViews;


@Override
public void onReceive(Context context, Intent intent) 
    super.onReceive(context, intent);

    if (intent.getAction().equals(DATA_FETCHED)) 
        int appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
        AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
        RemoteViews remoteViews = updateWidgetListView(context, appWidgetId);

        // update and notify widget when data arrives
        appWidgetManager.updateAppWidget(appWidgetId, remoteViews);
        appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetId, R.id.date);
    

请检查上面的代码并帮助我完成这项任务

【参考方案1】：

服务中：

            Intent intent = new Intent(this, MyProvider.class);
            intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
            intent.putExtra("City", City);
            intent.putExtra("Temp", myTemp);
            sendBroadcast(intent);

在 AppWidgetProvider 类中

@Override
public void onReceive(Context context, Intent intent) 
    super.onReceive(context, intent);

    Bundle bundle = intent.getExtras();

    if (bundle != null) 
         City = bundle.getString("City");
        Temperature = bundle.getInt("Temp");


        int appWidgetId = intent.getIntExtra(
                AppWidgetManager.EXTRA_APPWIDGET_ID,
                AppWidgetManager.INVALID_APPWIDGET_ID);
        AppWidgetManager appWidgetManager = AppWidgetManager
                .getInstance(context);
        RemoteViews remoteViews = updateWidgetListView(context, appWidgetId);

        appWidgetManager.updateAppWidget(currentWidgetId, remoteViews);

        appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetId,
                R.id.date);