RSSフィードから画像を取得する方法

Question

URLからRSSの値を取得するためのアプリケーションを開発しました。私のLogcatでは、私はイメージのURLを取得し、私はListViewでそれらのイメージを表示する必要が、それは動作していません。私のコード：

private Drawable ImageOperations(Context context, String url, String saveFilename) { 

} 


//FeedTabActivity.java 

public class FeedTabActivity extends Activity { 


ImageView imgView; 
private ListView feedListView; 
private ArrayList<Item> items; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState);  

    setContentView(R.layout.main);   
    feedListView = (ListView)findViewById(R.id.feedlist); 


    UpdateFeedTask twitter_task = new UpdateFeedTask(); 
    URL url = null; 
    try { 

     url = new URL("http://news.yahoo.com/rss/"); 
    } catch (MalformedURLException e) {  
     e.printStackTrace(); 
    } 
    twitter_task.execute(new URL[] {url});   
} 


@Override 
protected void onStart() { 
    super.onStart();   
} 

@Override 
protected void onResume() { 
    super.onResume();  
} 

@Override 
protected void onPause() { 
    super.onPause();  
} 

@Override 
protected void onStop() { 
    super.onStop(); 
} 

@Override 
protected void onDestroy() { 
    super.onDestroy(); 

} 

@Override 
public void onConfigurationChanged(Configuration newConfig){   
    super.onConfigurationChanged(newConfig); 
}  

private class UpdateFeedTask extends AsyncTask<URL, Void, ArrayList<Item>> {  

    protected void onPreExecute() { } 

    protected ArrayList<Item> doInBackground(URL...params) {  

     items = new ArrayList<Item>();   
     FeedHandler feedHandler = new FeedHandler(FeedTabActivity.this); 

     for(URL url : params) { 

      try { 
       Feed handledFeed = feedHandler.handleFeed(url); 

       items = handledFeed.getItems(); 
       System.out.println(" items " +items); 

      } catch (IOException ioe) {} 
       catch (SAXException se) {} 
       catch (ParserConfigurationException pce) {}    
     } 
     return items; 
    } 

    protected void onPostExecute(ArrayList<Item> result) { 

     System.out.println(" return " +result.size()); 
     FeedArrayAdapter arrayAdapter = new FeedArrayAdapter(FeedTabActivity.this, R.layout.row, result); 
     feedListView.setAdapter(arrayAdapter); 

    } 
} 

private class FeedArrayAdapter extends ArrayAdapter<Item> { 

    ArrayList<Item> items; 

    public FeedArrayAdapter(Context context, int textViewResourceId, ArrayList<Item> objects) { 
     super(context, textViewResourceId, objects); 
     this.items = objects; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 


     View row = convertView;  

     if(row==null){ 
      LayoutInflater inflater = getLayoutInflater(); 
      row=inflater.inflate(R.layout.row, parent, false); 
     } 

     Item item = items.get(position); 

     if(items!=null){ 

     TextView titleView = (TextView) row.findViewById(R.id.title); 
     TextView channelView = (TextView) row.findViewById(R.id.description); 

     ImageView imgView = (ImageView)row.findViewById(R.id.icon); 

     Drawable img = items.getDrawable(); // Here not getten getDrawable();        
     imgView.setImageDrawable(img); 

     titleView.setText(item.getTitle());   
     channelView.setText(item.getContent()); 

     } 



     return row; 
    } 


} 

private Drawable ImageOperations(Context context, String url, String saveFilename) { 
    try { 
     InputStream is = (InputStream) this.fetch(url); 
     Drawable d = Drawable.createFromStream(is, "src"); 
     return d; 
    } catch (MalformedURLException e) { 
     e.printStackTrace(); 
     return null; 
    } catch (IOException e) { 
     e.printStackTrace(); 
     return null; 
    } 
} 




public Object fetch(String address) throws MalformedURLException,IOException { 
    URL url = new URL(address); 
    Object content = url.getContent(); 
    return content; 
} 
} 

---

//Item.java

public class Item { 

private URL mLink; 
private String mTitle; 
private String mContent; 
private Drawable mimage; 
private List<Enclosure> mEnclosures; 

public Item() { 
    mEnclosures = new ArrayList<Enclosure>(); 

} 

public Item(URL link, String title, String description, Drawable images,String content, URL image, List<Enclosure> enclosures) { 
    super(); 

    this.mLink = link; 

    this.mTitle = title; 

    this.mContent = content; 
    this.mImage = image; 

    this.mEnclosures = enclosures; 
} 



public void setLink(URL link) { 
    this.mLink = link; 
} 

public URL getLink() { 
    return this.mLink; 
} 


public void setTitle(String title) { 
    this.mTitle = title; 
} 

public String getTitle() { 
    return this.mTitle; 
} 

public void setContent(String content) { 
    this.mContent = content; 
} 

public String getContent() { 
    return mContent; 
} 



public void setDrawable(Drawable d) { 
    this.mimage = d; 
} 
public Drawable getDrawable() { 
    return mimage; 
} 


public void addEnclosure(Enclosure enclosure) { 
    this.mEnclosures.add(enclosure); 
} 

public void setEnclosures(List<Enclosure> enclosures){ 
    this.mEnclosures = enclosures; 
} 

public List<Enclosure> getEnclosures() { 
    return this.mEnclosures; 
} 

public void setLink(String trim) { 
    // TODO Auto-generated method stub 

} 
} 

---

Feed.java

public class Feed { 

public static final String TYPE_RSS = "rss"; 

private Drawable mimage; 
private URL mURL; 
private URL mHomePage; 
private String mTitle; 
private String mType; 
private Date mRefresh = null; 
private boolean mEnabled = true; 
private ArrayList<Item> mItems; 



public Feed() { 
    mItems = new ArrayList<Item>(); 
} 

public Feed(URL url, URL homePage, String title, String type, Drawable images, Date refresh, boolean enabled, ArrayList<Item> items) { 
    super(); 
    this.mURL = url; 
    this.mHomePage = homePage; 
    this.mTitle = title; 
    this.mType = type; 
    this.mRefresh = refresh; 
    this.mEnabled = enabled; 
    this.mItems = items; 
    this.mimage = images; 
} 



public void setURL(URL url) { 
    this.mURL = url; 
} 

public URL getURL() { 
    return this.mURL; 
} 

public void setHomePage(URL homepage) { 
    this.mHomePage = homepage; 
} 

public URL getHomePage() { 
    return this.mHomePage; 
} 

public void setTitle(String title) { 
    this.mTitle = title; 
} 

public String getTitle() { 
    return this.mTitle; 
} 

public void setType(String type) { 
    this.mType = type; 
} 

public String getType() { 
    return mType; 
} 

public void setRefresh(Date refresh) { 
    mRefresh = refresh; 
} 

public Date getRefresh() { 
    return mRefresh; 
} 

public void enable() { 
    this.mEnabled = true; 
} 

public void disable() { 
    this.mEnabled = false; 
} 

public void addItem(Item item) { 
    this.mItems.add(item); 
} 

public void setItems(ArrayList<Item> items){ 
    this.mItems = items; 
} 

public ArrayList<Item> getItems() { 
    return this.mItems; 
} 

public Drawable getmImages() { 
    return mimage; 
} 

public void setmImages(Drawable mImages) { 
    this.mimage = mImages; 
} 

public String toString() { 
    String s = "{URL=" + this.mURL.toString() + " homepage=" + this.mHomePage.toString() + " title=" + this.mTitle + " type=" + this.mType + " update=" + this.mRefresh.toString() + " enabled=" + this.mEnabled; 
    s = s + " items={"; 
    Iterator<Item> iterator = this.mItems.iterator(); 
    while (iterator.hasNext()) { 
     s = s + iterator.next().toString(); 
    } 
    s = s + "}}"; 
    return s; 
} 

} 

Answer 1

作品：

View row = convertView;  

    if(row==null){ 
     LayoutInflater inflater = getLayoutInflater(); 
     row=inflater.inflate(R.layout.row, parent, false); 
    } 

を大幅に改善することができました。 ArrayAdapterは既にアイテムレイアウトを認識しており、すべての作業が完了します。見てくださいhere