Question

我想根据天气显示图像。我得到的图像来自drawable。

例如：如果代码= 30，它将显示雨天图标

我正在从

中检索它

   <yweather:condition  text="Light Rain with Thunder"  code="4"  temp="25"  date="Thu, 18 Jul 2013 7:58 am SGT" />

这是我的代码

MainActivity.java

public class MainActivity extends Activity {

 TextView weather;
 ImageView image;

 class MyWeather{


  String conditiontext;
  String conditiondate;

  String numberOfForecast;
  String forecast;

  public String toString(){

   return "\n- " 
           + "Weather:" + image + "\n"

    + "Condition: " + conditiontext + "\n"
    + conditiondate +"\n"

    + "\n"
    + "number of forecast: " + numberOfForecast + "\n"
    + forecast;

  } 
 }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        weather = (TextView)findViewById(R.id.weather);
        image = (ImageView)findViewById(R.id.image);

        Thread myThread = new Thread(new Runnable(){

   @Override
   public void run() {
    String weatherString = QueryYahooWeather();
          Document weatherDoc = convertStringToDocument(weatherString);

          final MyWeather weatherResult = parseWeather(weatherDoc);
          runOnUiThread(new Runnable(){

     @Override
     public void run() {
      weather.setText(weatherResult.toString());
     }});

   }});
        myThread.start();
    }

    private MyWeather parseWeather(Document srcDoc){

     MyWeather myWeather = new MyWeather();

        //<yweather:condition.../>
     Node conditionNode = srcDoc.getElementsByTagName("yweather:condition").item(0);
     if(conditionNode.getTextContent().equals("11")){
         image.setImageResource(R.drawable.logo);
     }
     else {

     image.setImageResource(R.drawable.old);
     }
     myWeather.conditiontext = conditionNode.getAttributes()
       .getNamedItem("text")
       .getNodeValue()
       .toString();
     myWeather.conditiondate = conditionNode.getAttributes()
       .getNamedItem("date")
       .getNodeValue()
       .toString();

     //Added to get elements of <yweather:forecast.../>
     NodeList forecastList = srcDoc.getElementsByTagName("yweather:forecast");

     myWeather.forecast = "";
     if(forecastList.getLength() > 0){
      myWeather.numberOfForecast = String.valueOf(forecastList.getLength());
      for(int i = 0; i < forecastList.getLength(); i++){
       Node forecastNode = forecastList.item(i);
       myWeather.forecast +=
         forecastNode
          .getAttributes()
          .getNamedItem("date")
          .getNodeValue()
          .toString() + " " +
         forecastNode
          .getAttributes()
          .getNamedItem("text")
          .getNodeValue()
          .toString() +
         " High: " + forecastNode
             .getAttributes()
             .getNamedItem("high")
             .getNodeValue()
             .toString() +
         " Low: " + forecastNode
             .getAttributes()
             .getNamedItem("low")
             .getNodeValue()
             .toString() + "\n";
      }
     }else{
      myWeather.numberOfForecast = "No forecast";
     }

     return myWeather; 
    }

    private Document convertStringToDocument(String src){

     Document dest = null;
     DocumentBuilderFactory dbFactory =
       DocumentBuilderFactory.newInstance();
     DocumentBuilder parser;

     try {
      parser = dbFactory.newDocumentBuilder();
      dest = parser.parse(new ByteArrayInputStream(src.getBytes())); 
     } catch (ParserConfigurationException e1) {
      e1.printStackTrace();
      Toast.makeText(MainActivity.this,
        e1.toString(), Toast.LENGTH_LONG).show(); 
     } catch (SAXException e) {
      e.printStackTrace();
      Toast.makeText(MainActivity.this,
        e.toString(), Toast.LENGTH_LONG).show(); 
     } catch (IOException e) {
      e.printStackTrace();
      Toast.makeText(MainActivity.this,
        e.toString(), Toast.LENGTH_LONG).show(); 
     }

     return dest; 
    }

    private String QueryYahooWeather(){

     String qResult = "";
     String queryString = "http://weather.yahooapis.com/forecastrss?w=1062617&u=c";

     HttpClient httpClient = new DefaultHttpClient();
     HttpGet httpGet = new HttpGet(queryString);

     try {
      HttpEntity httpEntity = httpClient.execute(httpGet).getEntity();

      if (httpEntity != null){
       InputStream inputStream = httpEntity.getContent();
       Reader in = new InputStreamReader(inputStream);
       BufferedReader bufferedreader = new BufferedReader(in);
       StringBuilder stringBuilder = new StringBuilder();

       String stringReadLine = null;

       while ((stringReadLine = bufferedreader.readLine()) != null) {
        stringBuilder.append(stringReadLine + "\n"); 
       }

       qResult = stringBuilder.toString(); 
      } 
     } catch (ClientProtocolException e) {
      e.printStackTrace();
      Toast.makeText(MainActivity.this,
        e.toString(), Toast.LENGTH_LONG).show(); 
     } catch (IOException e) {
      e.printStackTrace();
      Toast.makeText(MainActivity.this,
        e.toString(), Toast.LENGTH_LONG).show(); 
     }

     return qResult; 
    }

}

Answer 1

我在代码中发现了一些问题，有两个图像视图

 Image = (ImageView)findViewById(R.id.image);

问题 - ：缺少图像的名称

 ImageView foreImage = new ImageView(this);
 foreImage.setImageResource(R.drawable.logo);

//为什么使用动态图像视图

您应该使用处理程序线程来显示图像。

Answer 2

仍然没有用？

我自己制作了这个项目，如果你这样做就可以了。：）

R.id和drawables不一样，你需要更改它们才能使它工作

 TextView weather;
 ImageView forecast;
 private static Handler mHandler = new Handler();
 class MyWeather{


  String conditiontext;
  String conditiondate;

  String numberOfForecast;
  String forecast;

  public String forecastToString(){

   return "\n- " 
           + "Weather: " +"you wanted to have something here, I just dont understand what. " + "\n"

    + "Condition: " + conditiontext + "\n"
    + conditiondate +"\n"

    + "\n"
    + "number of forecast: " + numberOfForecast + "\n"
    + forecast;

  } 
 }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        weather = (TextView)findViewById(R.id.textView1);
        forecast = (ImageView)findViewById(R.id.imageView1);

        Thread myThread = new Thread(new Runnable(){

   @Override
   public void run() {
    String weatherString = QueryYahooWeather();
          Document weatherDoc = convertStringToDocument(weatherString);

          final MyWeather weatherResult = parseWeather(weatherDoc);
          runOnUiThread(new Runnable(){

     @Override
     public void run() {
      weather.setText(weatherResult.forecastToString());
     }});

   }});
        myThread.start();
    }

    private MyWeather parseWeather(Document srcDoc){

     MyWeather myWeather = new MyWeather();

        //<yweather:condition.../>
     Node conditionNode = srcDoc.getElementsByTagName("yweather:condition").item(0);


     String weatherCode = conditionNode.getAttributes()
           .getNamedItem("code")
           .getNodeValue()
           .toString();

     if(weatherCode.equals("28")){

         mHandler.post(new Runnable() {
            @Override
            public void run() {
                // This gets executed on the UI thread so it can safely modify
                // Views

                 forecast.setImageResource(R.drawable.ic_launcher);
            }
        });

     }
     ...

如何根据可绘制的天气显示图像

2 个答案: