Question

在我的Android代码中，我有AsyncTask，似乎无法转换为简单的Public void函数。

 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]));
        //  WeatherC = params[0];
        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);
        }
        WeatcherCels = ("" + Math.round((weather.temperature.getTemp() - 273.15)) + " C");

        Toast.makeText(context, WeatcherCels, Toast.LENGTH_SHORT).show();


    }

}

我执行task的方式是：

 JSONWeatherTask task = new JSONWeatherTask();
    task.execute(new String[]{"canada,toronto"});

但是，我试图使用以下内容：

String WeatherStr = getWeather("canada,toronto");

Answer 1

你可以这样做：

创建这样的方法：

 String getWeather(String... arr)
{
    JSONWeatherTask task = new JSONWeatherTask();
    task.execute(arr);
    return task.get();
}

然后

String weather = getWeather("a","b");

但它会阻止ui，直到asyntask doinbackground完成。

Android，将AsyncTask转换为公共void函数？

1 个答案: