Question

我在Android应用程序中工作。我正在使用一个Gallery小部件，我将Imageview和Imagebutton绑定到该小部件。在按钮上单击我隐藏图库中的一个按钮，但在滚动并返回后隐藏按钮再次可见。是什么导致这种情况发生。滚动后画廊是否再次绑定。如果可能，请提供任何有效链接以解决此问题。

这是我的代码：

public class ImageAdapter extends BaseAdapter {

    private int mGalleryItemBackground;
    private Activity mContext;
    private Integer[] Images;




    public ImageAdapter(Activity c,Integer[] images) {
        this.mContext = c;
        this.Images=images;
        TypedArray attr = mContext.obtainStyledAttributes(R.styleable.HelloGal999lery);
        mGalleryItemBackground = attr.getResourceId(
                R.styleable.HelloGal999lery_android_galleryItemBackground, 0);
        attr.recycle();

    }

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

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

    public long getItemId(int position) {
        return 1;
    }

    public boolean onInterceptTouchEvent(MotionEvent __e) {
        return false;
    }


   public  static class ViewHolder{
        public ImageView imageView1;
        public ImageButton btn1;
        public ProgressBar processdialog;
     }
        //Binding image and button to gallery
    public View getView(final int position, View convertView, ViewGroup parent) {  

         final ViewHolder holder;   
         View rowView = convertView;

        if(rowView==null)
        {
         LayoutInflater inflater = mContext.getLayoutInflater();
         rowView = inflater.inflate(R.layout.test, null, true);
         holder=new ViewHolder();
         holder.imageView1=(ImageView) rowView.findViewById(R.id.ImageViewuser);    
         holder.btn1=(ImageButton)rowView.findViewById(R.id.Download);
         holder.processdialog=(ProgressBar)rowView.findViewById(R.id.progressbar_Horizontal);
         holder.imageView1.setImageResource(Images[position]);               
         holder.imageView1.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
         holder.imageView1.setBackgroundResource(mGalleryItemBackground);      
         holder.btn1.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub                              
                //Toast.makeText(mContext, position+"", Toast.LENGTH_SHORT).show();                    
                holder.processdialog.setVisibility(View.VISIBLE);   
                BackgroundAsyncTask dd=new BackgroundAsyncTask();
                dd.execute();
            }
             class BackgroundAsyncTask extends
                AsyncTask<Void, Integer, Void> {

              int myProgress;

              @Override
              protected void onPostExecute(Void result) {
               // TODO Auto-generated method stub
               Toast.makeText(mContext,
                     "Download finished", Toast.LENGTH_LONG).show();
             holder.processdialog.setVisibility(View.INVISIBLE);
             holder.btn1.setVisibility(View.VISIBLE);
              }

              @Override
              protected void onPreExecute() {
               // TODO Auto-generated method stub
             /*  Toast.makeText(mContext,
                     "Downloading", Toast.LENGTH_LONG).show();
               myProgress = 0;*/
                  holder.processdialog.setVisibility(View.VISIBLE);
                  holder.btn1.setVisibility(View.INVISIBLE);
              }

              @Override
              protected Void doInBackground(Void... params) {
               // TODO Auto-generated method stub
               while(myProgress<100){
                myProgress++;
                publishProgress(myProgress);
                   SystemClock.sleep(100);
                   holder.btn1.setVisibility(View.INVISIBLE);
                   holder.processdialog.setVisibility(View.VISIBLE);
               }
               return null;
              }

              @Override
              protected void onProgressUpdate(Integer... values) {

                  holder.processdialog.setProgress(values[0]);
              }
             }
        });

        }

         return rowView;                    
    }

请帮帮我。

提前致谢。

Answer 1

也许视图可以重复使用。尝试删除if（rowView == null）。

Gallery小部件重新绑定问题

1 个答案: