錯誤的GridView與圖像的URL

Question

進出口新到Android ..

IM面臨與圖像URL網格佈局問題..

我的代碼..

public class act extends Activity { 
    static String uri1 = "https://i3.ytimg.com/vi/bQaWsVQSLdY/default.jpg"; 
    static String uri2 = "https://i4.ytimg.com/vi/cJQCniWQdno/mqdefault.jpg"; 
    static String uri3 = "https://i1.ytimg.com/vi/D8dA4pE5hEY/mqdefault.jpg"; 
    public static String[] urls = { uri1, uri2, uri3 }; 
    public Bitmap bitmap; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     GridView grd = (GridView) findViewById(R.id.gridView1); 
     grd.setAdapter(new ImageAdapter(this)); 
     grd.setOnItemClickListener(new OnItemClickListener() { 
      public void onItemClick(AdapterView<?> parent, View v, int pos, 
        long id) { 
       Toast.makeText(getBaseContext(), "pic" + (pos + 1) + "select ", 
         Toast.LENGTH_SHORT).show(); 
      } 
     }); 
    } 

    public class ImageAdapter extends BaseAdapter { 
     private Context context; 
     private int itemBackground; 

     ImageAdapter(Context c) { 
      context = c; 
      TypedArray a = obtainStyledAttributes(R.styleable.Gallery1); 
      itemBackground = a.getResourceId(
        R.styleable.Gallery1_android_galleryItemBackground, 0); 
      a.recycle(); 
     } 

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

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

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

     public View getView(int pos, View cv, ViewGroup vg) { 
      Bitmap bitmap = DownloadImage(urls[pos]); 
      ImageView imageview = new ImageView(context); 
      imageview.setImageBitmap(bitmap); 
      return cv; 
     } 

     private Bitmap DownloadImage(String URL) { 
      final String URL1 = URL; 
      new Thread() { 
       public void run() { 
        InputStream in = null; 
        Message msg = Message.obtain(); 
        msg.what = 1; 
        try { 
         in = OpenHttpConnection(URL1); 
         Bitmap bitmap = BitmapFactory.decodeStream(in); 
         Bundle b = new Bundle(); 
         b.putParcelable("bitmap", bitmap); 
         msg.setData(b); 
         in.close(); 
        } catch (IOException e1) { 
         // TODO Auto-generated catch block 
         e1.printStackTrace(); 
        } 
       } 
      }.start(); 
      return bitmap; 
     } 

     private InputStream OpenHttpConnection(String urlString) 
       throws IOException { 
      InputStream in = null; 
      int response = -1; 
      URL url = new URL(urlString); 
      URLConnection conn = url.openConnection(); 
      if (!(conn instanceof HttpURLConnection)) 
       throw new IOException("Not an HTTP connection"); 
      try { 
       HttpURLConnection httpConn = (HttpURLConnection) conn; 
       httpConn.setAllowUserInteraction(false); 
       httpConn.setInstanceFollowRedirects(true); 
       httpConn.setRequestMethod("GET"); 
       httpConn.connect(); 
       response = httpConn.getResponseCode(); 
       if (response == HttpURLConnection.HTTP_OK) { 
        in = httpConn.getInputStream(); 
       } 
      } catch (Exception ex) { 
       throw new IOException("Error connecting"); 
      } 
      return in; 
     } 
    } 
} 

logcat的

 E/AndroidRuntime(832): at 
    android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) 
    E/AndroidRuntime(832): at 
    android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017) 
    E/AndroidRuntime(832): at 
    android.widget.LinearLayout.measureVertical(LinearLayout.java:386) 
    E/AndroidRuntime(832):  at 
    android.widget.LinearLayout.onMeasure(LinearLayout.java:309) 
    E/AndroidRuntime(832):  at android.view.View.measure(View.java:8313) 
    E/AndroidRuntime(832):  at 
    android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) 
     E/AndroidRuntime(832): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250) 
    E/AndroidRuntime(832):  at android.view.View.measure(View.java:8313) 
    E/AndroidRuntime(832):  at 
     android.widget.LinearLayout.measureVertical(LinearLayout.java:531) 
     E/AndroidRuntime(832): at 
     android.widget.LinearLayout.onMeasure(LinearLayout.java:309) 
     E/AndroidRuntime(832): at android.view.View.measure(View.java:8313) 
     E/AndroidRuntime(832): at 
     android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) 
     E/AndroidRuntime(832): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250) 
     E/AndroidRuntime(832): at android.view.View.measure(View.java:8313) 
     E/AndroidRuntime(832): at android.view.ViewRoot.performTraversals(ViewRoot.java:839) 
     E/AndroidRuntime(832): at android.view.ViewRoot.handleMessage(ViewRoot.java:1859) 
     E/AndroidRuntime(832): at android.os.Handler.dispatchMessage(Handler.java:99) 
     E/AndroidRuntime(832): at android.os.Looper.loop(Looper.java:123) 
     E/AndroidRuntime(832): at android.app.ActivityThread.main(ActivityThread.java:3683) 
     E/AndroidRuntime(832): at java.lang.reflect.Method.invokeNative(Native Method) 
     E/AndroidRuntime(832): at java.lang.reflect.Method.invoke(Method.java:507) 
     E/AndroidRuntime(832): at 
     com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
     E/AndroidRuntime(832): at 
     com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
     E/AndroidRuntime(832): at dalvik.system.NativeStart.main(Native Method) 

Answer 1

我推薦給你看這個：http://xjaphx.wordpress.com/2011/06/12/custom-grid-view-of-applications/