根据图标播放天气声音

Play weather sounds based on it's icons

我刚刚完成应用的天气图标实现,现在我正尝试根据应用显示的图标在应用上播放天气声音。经过长时间的深入研究,令我震惊的是,在任何平台上都没有人问过类似的问题。

我对 java 词典的了解非常狭窄,即使花时间阅读和研究他们的示例,我仍然很难理解文档。即我找到了一份我认为符合我在这里要实现的目标的文档 https://docs.oracle.com/javase/8/docs/api/java/util/Map.html

说明

V put(K key,
      V value)

将指定值与此映射中的指定键相关联。在那种情况下,我想使用 K 作为图标,使用 V 作为我的声音,但我不知道如何应用它,所以我寻找示例并看到了这个 https://study.com/academy/lesson/the-java-dictionary-class-definition-example.html 它提供的示例仍然不足以提供帮助我通过了,我知道如果我自己尝试解决它会把它搞砸,所以我决定在这里提出这个问题,看看是否有人可以提供帮助,我将非常感激。

按照 API 说明,我正在使用 https://openweathermap.org/weather-conditions。 有9种主要天气状况。

这些是我尝试根据图标播放声音的目标:

这是我的片段代码:

public class FirstFragment extends Fragment {

    private WeatherDataViewModel viewModel;

    MediaPlayer firstSound, secondSound, thirdSound, fourthSound, fifthSound, sixthSound, seventhSound, eightSound, ninethSound;

    public FirstFragment() {
// Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
    // Inflate the layout for this fragment
        View rootView = inflater.inflate(R.layout.fragment_first, container, false);
    // For displaying weather data
        final TextView current_temp = rootView.findViewById(R.id.textView10);
        final TextView current_output = rootView.findViewById(R.id.textView11);
        final TextView rise_time = rootView.findViewById(R.id.textView25);
        final TextView set_time = rootView.findViewById(R.id.textView26);
        final TextView temp_out = rootView.findViewById(R.id.textView28);
        final TextView Press_out = rootView.findViewById(R.id.textView29);
        final TextView Humid_out = rootView.findViewById(R.id.textView30);
        final TextView Ws_out = rootView.findViewById(R.id.textView33);
        final TextView Visi_out = rootView.findViewById(R.id.textView34);
        final TextView Cloud_out = rootView.findViewById(R.id.textView35);
        final ImageView current_icon = rootView.findViewById(R.id.imageView6);
        final SwipeRefreshLayout realSwipe = rootView.findViewById(R.id.real_swipe);


    // Get our ViewModel instance
        viewModel = new ViewModelProvider(this).get(WeatherDataViewModel.class);



    // And whenever the data changes, refresh the UI
        viewModel.getWeatherDataLiveData().observe(getViewLifecycleOwner(), data -> {

            realSwipe.setOnRefreshListener(() -> {
                // perform you action here for ex. add refresh screen code here
                new Handler().postDelayed(() -> {
                    // this code is for stop refreshing icon, After 1000 ms automatically refresh icon will stop
                    realSwipe.setRefreshing(false);
                }, 1000);
            });

            int drawableResource = -1; // here define default icon for example R.drawable.default_weather_icon

            if (data != null) {
                current_temp.setVisibility(View.VISIBLE);
                current_temp.setText(data.getMain().getTemp() + " ℃"); // for that you can use strings resource and templates more in https://developer.android.com/guide/topics/resources/string-resource.html#formatting-strings
                current_output.setVisibility(View.VISIBLE);
                current_output.setText(data.getWeather().get(0).getDescription());
                rise_time.setVisibility(View.VISIBLE);
                rise_time.setText(data.getSys().getSunrise() + " ");
                set_time.setVisibility(View.VISIBLE);
                set_time.setText(data.getSys().getSunset() + " ");
                temp_out.setVisibility(View.VISIBLE);
                temp_out.setText(data.getMain().getTemp() + " ℃");
                Press_out.setVisibility(View.VISIBLE);
                Press_out.setText(data.getMain().getPressure() + " hpa");
                Humid_out.setVisibility(View.VISIBLE);
                Humid_out.setText(data.getMain().getHumidity() + " %");
                Ws_out.setVisibility(View.VISIBLE);
                Ws_out.setText(data.getWind().getSpeed() + " Km/h");
                Visi_out.setVisibility(View.VISIBLE);
                Visi_out.setText(data.getVisibility() + " m");
                Cloud_out.setVisibility(View.VISIBLE);
                Cloud_out.setText(data.getClouds().getAll() + " %");

// get actual weather.

                String icon = data.getWeather().get(0).getIcon();

                switch (icon) {
                    case "01d":
                    case "01n":
                        drawableResource = R.drawable.sun;

                        break;
                    case "02d":
                    case "021n":
                        drawableResource = R.drawable.few_clouds;

                        break;
                    case "03d":
                    case "03n":
                        drawableResource = R.drawable.scattered_clouds;

                        break;
                    case "04d":
                    case "04n":
                        drawableResource = R.drawable.broken_clouds;

                        break;
                    case "09d":
                    case "09n":
                        drawableResource = R.drawable.shower_rain;

                        break;
                    case "10d":
                    case "10n":
                        drawableResource = R.drawable.small_rain;

                        break;
                    case "11d":
                    case "11n":
                        drawableResource = R.drawable.thunderstorm;

                        break;
                    case "13d":
                    case "13n":
                        drawableResource = R.drawable.snow;

                        break;
                    case "50d":
                    case "50n":
                        drawableResource = R.drawable.mist;
                        break;
                }


                if (drawableResource != -1)
                    current_icon.setImageResource(drawableResource);

            } else {
                Log.e("TAG", "No City found");
                current_temp.setVisibility(View.GONE);
                current_output.setVisibility(View.GONE);
                rise_time.setVisibility(View.GONE);
                set_time.setVisibility(View.GONE);
                temp_out.setVisibility(View.GONE);
                Press_out.setVisibility(View.GONE);
                Humid_out.setVisibility(View.GONE);
                Ws_out.setVisibility(View.GONE);
                Visi_out.setVisibility(View.GONE);
                Cloud_out.setVisibility(View.GONE);
                Toast.makeText(requireActivity(), "No City found", Toast.LENGTH_SHORT).show();
            }
        });

        return rootView;
    }

    public void getWeatherData(String name) {
// The ViewModel controls loading the data, so we just
// tell it what the new name is - this kicks off loading
// the data, which will automatically call through to
// our observe() call when the data load completes
        viewModel.setCityName(name);
    }
}

编辑:

DennisVA 提供了一个我可以遵循的示例(我尝试了他的第二个建议),但当我尝试时,我遇到了一些错误,我在他的评论部分使用 link 分享了这些错误。 我决定悬赏这个 post 以引起更多关注,这样我就可以被更多地引导到正确的方向。

我会创建一个包装器,以便更轻松地向您展示内容 UI

例如:

public class Weather{
   @DrawableRes
   private int icon; //Resource id of the drawable
   private String sound; //Name or path the the sound file

   public Weather(WeatherPojo pojo){
       switch(pojo.icon){
                case "01d":
                case "01n":
                    this.icon = R.drawable.sun;
                    this.sound = ...
       }

   }
}

这个 class 也可以包含一个 play(MediaPlayer player) 方法

我注意到的其他一些事情:

编辑:

另一个可能更好的选择是创建某种 WeatherFactory class 或生成抽象天气 class 的子class 的解析器, 并让摘要 class 包含播放媒体文件的代码:

public abstract class Weather{
     @DrawableRes
     private int iconResId;
     @RawRes 
     private int soundResId;

     protected Weather(@DrawableRes int iconResId, @RawRes int soundResId){
        this.iconResId = iconResId;
        this.soundResId = soundResId
     }

     public void playSound(MediaPlayer mediaPlayer, Context context){

        String assetFileDescriptor = context.resources.openRawResourceFd(soundResId);

        if(assetFileDescriptor == null)
             return;

        mediaPlayer.reset();
        mediaPlayer.setDataSource(assetFileDescriptor.fileDescriptor, 
        assetFileDescriptor.startOffset, assetFileDescriptor.declaredLength);
        mediaPlayer.prepareAsync();
     }
} 

public class Snow extends Weather{
      public Snow(){
          super(R.drawable.snow, R.raw.snow)
      }
}

现在您可以在您的片段或 viewModel 中调用 snow.playSound() 并在抽象中生成 getter 和 setter class 以获取可绘制对象并显示它。

其他变量例如描述也可以注入到子class的构造函数中,或者你可以为不同类型的雪(LightSnow,HeavySnow)扩展子classes , ...)

注意:我还没有测试过这段代码的任何部分,所以它可能需要在这里和那里进行一些更改

MediaPlayer firstSound, secondSound, thirdSound, fourthSound, fifthSound, sixthSound, seventhSound, eightSound, ninethSound;

这里您创建了 9 个 MediaPlayer 对象,并且从它们的名称和数量来看,它们与图标的数量完全相同;我意识到每个人都会处理某个图标的声音。

不过,您只能使用一个 MediaPlaer 对象来播放您拥有的 9 种声音中的任何一种。把它想象成你的操作系统媒体播放器,你有一个单一的媒体播放器应用程序,你可以一次拖放任何媒体文件,并随时更改它,而无需更改应用程序本身。

只要您想一次播放一个媒体文件,这就有效;但是,如果您想同时播放多个声音,您可能需要多个 MediaPlayer 对象。

所以,在你的情况下,你一次只有一个是否条件,所以我假设你想一次播放一个文件;因此你一次只有一个图标(由于 switch 语句),因此你需要将上面提到的代码片段更改为单个变量:

MediaPlayer mediaPlayer;

My knowledge of java dictionary is quite narrow and I find it hard to understand documentation

一个字典(或者java准确的说是一个Map),把它想象成一个phone目录:你知道人名(Key),需要得到对应的phone 数字(值);此示例中的不同之处在于,在 phone 目录中,每个 key/person 只有一个唯一值;但在 java Map 中,您可以有重复的值(即多个 key/person 可以拥有相同的 value/phone 号码)。

V put(K key,
     V value)

此外,在 java 中,键和值几乎可以是任何东西,这可以通过 generics.

的 (K & V) 符号来表示

I thought of using K as Icon and V as my sound but I didn't know how to apply it

在共享的简单示例中,我真的不认为您需要地图;由于声音资源与相应的图标可绘制资源高度耦合,因此您可以像处理可绘制资源一样处理声音原始文件。

因此,无论何时更改当前可绘制对象(即在 switch 语句中),您还需要在 switch 语句中更改当前声音,假设它们与可绘制对象具有相同的名称:

MediaPlayer mediaPlayer; // single MediaPlayer object

int drawableResource = -1; // here define default icon for example R.drawable.default_weather_icon
int soundResource = -1; // Default sound is nothing

String icon = data.getWeather().get(0).getIcon();
switch (icon) {
    case "01d":
    case "01n":
        drawableResource = R.drawable.sun;
        soundResource = R.raw.sun;
        break;
    case "02d":
    case "021n":
        drawableResource = R.drawable.few_clouds;
        soundResource = R.raw.few_clouds;

        break;
    case "03d":
    case "03n":
        drawableResource = R.drawable.scattered_clouds;
        soundResource = R.raw.scattered_clouds;

        break;
    case "04d":
    case "04n":
        drawableResource = R.drawable.broken_clouds;
        soundResource = R.raw.broken_clouds;

        break;
    case "09d":
    case "09n":
        drawableResource = R.drawable.shower_rain;
        soundResource = R.raw.shower_rain;

        break;
    case "10d":
    case "10n":
        drawableResource = R.drawable.small_rain;
        soundResource = R.raw.small_rain;

        break;
    case "11d":
    case "11n":
        drawableResource = R.drawable.thunderstorm;
        soundResource = R.raw.thunderstorm;

        break;
    case "13d":
    case "13n":
        drawableResource = R.drawable.snow;
        soundResource = R.raw.snow;

        break;
    case "50d":
    case "50n":
        drawableResource = R.drawable.mist;
        soundResource = R.raw.mist;
        break;
}


if (drawableResource != -1)
    current_icon.setImageResource(drawableResource);
    
    
if (soundResource != -1) {
    prepareMediaPlayer(soundResource);
}



// In FirstFragment:

private void prepareMediaPlayer(int resource) {
    // add track file
    mMediaPlayer = MediaPlayer.create(requireActivity(), resource);

    // listening to when the media file finishes playing so that we can release the resources
    mMediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mp) {
            if (mMediaPlayer != null) {
                mMediaPlayer.release();
            }
        }
    });
    
}

并且无论什么时候你想播放声音,只要调用mMediaPlayer.start(),但要确保提前调用prepareMediaPlayer()

提示:如果你想使用地图,我建议你为天气创建一个 POJO/Data class,这样我们可能会有一个地图。