如何禁用图库的项目?

问题描述:

我有一个画廊,我已经实现了扩展BaseAdapter的自定义适配器。对于某些项目,我希望它们被禁用,并且不可点击。如何禁用图库的项目?

重写isEnabled(int)方法不起作用。我仍然可以点击禁用的项目,然后,画廊将其中心放置在该项目中。

任何想法?

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try setFocusable(false);可能会工作 – ingsaurabh

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这也行不通。 onItemClick事件被调用。 –

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你可以粘贴你的代码或来到这个房间http://chat.*.com/rooms/10629/agarwal –

这下面是画廊插件

public boolean onSingleTapUp(MotionEvent e) { 

    if (mDownTouchPosition >= 0) { 

     // An item tap should make it selected, so scroll to this child. 
     scrollToChild(mDownTouchPosition - mFirstPosition); 

     // Also pass the click so the client knows, if it wants to. 
     if (mShouldCallbackOnUnselectedItemClick || mDownTouchPosition == mSelectedPosition) { 
      performItemClick(mDownTouchView, mDownTouchPosition, mAdapter 
        .getItemId(mDownTouchPosition)); 
     } 

     return true; 
    } 

    return false; 
} 

正如你所看到的相关源代码,画廊滚动轻敲的子项在其上进行点击之前。 因此,真正禁用物品的唯一方法是将其延伸Gallery并覆盖其中的onSingleTapUp(MotionEvent e)

@Override 
public boolean onSingleTapUp(MotionEvent e) { 
    int itemPosition = pointToPosition((int) e.getX(), (int) e.getY()); 
    if (item at itemPosition is disabled) { 
     // Do nothing. 
     return true; 
    } 
    return super.onSingleTapUp(e); 
} 

试着让我知道。

尝试下面的代码,您可以在其中处理特定位置的点击事件。您也可以禁用特定项目。

public class SplashActivity extends Activity{ 
    private Activity _activity; 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     Gallery g = new Gallery(this); 
       g.setAdapter(new ImageAdapter(this)); 
       setContentView(g); 
    } 

    public class ImageAdapter extends BaseAdapter { 
     int mGalleryItemBackground; 
     private Context mContext; 

     private Integer[] mImageIds = { 
       R.drawable.menu1, 
       R.drawable.menu2, 
       R.drawable.menu3, 
       R.drawable.menu4, 
       R.drawable.menu1, 
       R.drawable.menu2, 
       R.drawable.menu3, 
       R.drawable.menu4 
     }; 

     public ImageAdapter(Context c) { 
      mContext = c; 

     } 

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

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

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

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

      ImageView i = new ImageView(mContext); 

      i.setImageResource(mImageIds[position]); 
      i.setLayoutParams(new Gallery.LayoutParams(150, 100)); 
      i.setScaleType(ImageView.ScaleType.FIT_XY); 
      i.setBackgroundResource(mGalleryItemBackground); 
      if(position!=0){ 
      i.setEnabled(false); 
      i.setOnClickListener(new OnClickListener() { 

       @Override 
       public void onClick(View v) { 
        // TODO Auto-generated method stub 
        Toast.makeText(SplashActivity.this, "" + position, Toast.LENGTH_SHORT).show(); 
       } 
      }); 
      } 
      return i; 
     } 
    } 
} 
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你有试过吗? –