將URL中的圖像加載到圖庫中

我正在嘗試將圖像從網站加載到圖庫中。圖片無法加載到圖庫中。第一個（主）圖像確實加載。將URL中的圖像加載到圖庫中

public class viewimages extends Activity { 

private Gallery gallery; 
private ImageView imgView; 

private Integer[] Imgid = { 
     R.drawable.a_1, R.drawable.a_2, R.drawable.a_3, R.drawable.a_4 
}; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.viewimages); 
    try { 
    URL url = new URL("http://www.mysite.com/images/1000298/pics/1.jpg"); 

     Bitmap bmp = BitmapFactory.decodeStream(url.openConnection() 
          .getInputStream()); 
     imgView = (ImageView)findViewById(R.id.ImageView01);  
     imgView.setImageBitmap(bmp); 
    } catch (IOException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 



    gallery = (Gallery) findViewById(R.id.examplegallery); 
    gallery.setAdapter(new AddImgAdp(this)); 

    gallery.setOnItemClickListener(new OnItemClickListener() { 
     public void onItemClick(AdapterView parent, View v, int position, long id) { 
      imgView.setImageResource(Imgid[position]); 
     } 
    }); 


} 

public class AddImgAdp extends BaseAdapter { 
    int GalItemBg; 
    private Context cont; 

    public AddImgAdp(Context c) { 
     cont = c; 

     TypedArray typArray = obtainStyledAttributes(R.styleable.GalleryTheme); 
     GalItemBg = typArray.getResourceId(R.styleable.GalleryTheme_android_galleryItemBackground, 0); 
     typArray.recycle(); 
    } 

    public int getCount() { 
     return Imgid.length; 
    } 

    public Object getItem(int position) { 
     return position; 
    } 

    public long getItemId(int position) { 
     return position; 
    } 

    public View getView(int position, View convertView, ViewGroup parent) { 
     ImageView imgView = new ImageView(cont); 
     List<String> imageNames = new ArrayList<String>(); 
     imageNames.add("1.jpg"); 
     imageNames.add("2.jpg"); 
     //etc. until you've added all images 

     for (int i = 0; i < imageNames.size(); i++){ 
      URL url; 
      try { 
       url = new URL("http://www.mysite.com/images/1000298/pics/" + imageNames.get(i)); 
       Bitmap bmp = BitmapFactory.decodeStream(url.openConnection() 
         .getInputStream()); 
       imgView.setImageBitmap(bmp); 
       imgView.setLayoutParams(new Gallery.LayoutParams(80, 70)); 
       imgView.setScaleType(ImageView.ScaleType.FIT_XY); 
       imgView.setBackgroundResource(GalItemBg); 
      } catch (MalformedURLException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 

     } 



     return imgView; 
    } 
} 

    }

問題似乎是在AddImgAdp類的getView（）中。我不確定這是否是嘗試從網站加載圖像的正確位置？

來源

2012-08-02 user1197941

您需要先載入所有圖像。基本上你在做的是當適配器加載時，你正在循環，試圖加載所有的圖像。創建一個下載圖像的異步任務（我建議將它們加載到另一個數組列表中，直到您對緩存等事情更加舒適）。然後，當您設置適配器時，請抓住位置以使用您要查找的圖像。例如，

"imgView.setImageBitmap(imageArray.get(position))";

來源

2012-08-02 18:42:07 RyanInBinary

今天已經存在許多Android圖像加載庫，嘗試使用它們，使開發更簡單。例如https://github.com/gobozov/Android-Universal-Image-Loader

來源

2012-08-02 18:48:43

將URL中的圖像加載到圖庫中

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