java - Listview多重复 Action ？

Question

我的 ListView 中有重复的操作问题我在互联网上做了很多研究都失败了我的问题是当我点击项目编号1它展开时，当我向下滚动分页附加更多项目时我发现项目编号10也被扩展，另一个例子，如果我切换项目编号 2，则编号 2 和编号 12 项目都会一起切换!!

如何解决这个重复问题？

这是 ListView 类

public class Ringtones_Listview extends ArrayAdapter<Object> {

    int resource;
    String response;
    Context context;
    private LayoutInflater mInflater;
    MediaPlayer mp = null;
    ImageView play_clicked;
    View vv = null;
    String lang = Locale.getDefault().getDisplayLanguage();
    ArrayList ob;
    Integer clickedposition; 

    public Ringtones_Listview(Context context, int resource, ArrayList objects) {
        super(context, resource,objects);

        this.context = context;
        this.ob = objects;
        this.resource = resource;
        mInflater = LayoutInflater.from(context);
    }
    public int getCount() {
        return ob.size();
    }

    public JSONObject getItem(JSONObject position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }
    static class ViewHolder {

        ImageView play ;
        ImageView download ;
        TextView  rtitle;
        TextView  size;
        TextView  downloads;
        TextView  personname;
        TextView  date;
        RatingBar ratingsmall;
        ImageView ratebutton;
        long    tonid;
        TextView  voters;
        LinearLayout more;
    }

    @SuppressWarnings("deprecation")
    public View getView(final int position, View convertView, ViewGroup parent)
    {
        ViewHolder holder;
        //Get the current location object
        JSONObject r = (JSONObject) getItem(position);

        //Inflate the view
       if(convertView == null)
       {

            convertView = mInflater.inflate(R.layout.ringtone_bit, null);
            holder = new ViewHolder();
            convertView.setTag(holder);


            holder.play        = ( ImageView ) convertView.findViewById(R.id.play);
            holder.download    = ( ImageView ) convertView.findViewById(R.id.download);
            holder.ratebutton  = ( ImageView ) convertView.findViewById(R.id.ratebutton);
            holder.rtitle      = (TextView)  convertView.findViewById(R.id.rtitle);
            holder.size        = (TextView)  convertView.findViewById(R.id.size);
            holder.downloads   = (TextView)  convertView.findViewById(R.id.downloads);
            holder.voters      = (TextView)  convertView.findViewById(R.id.voters);
            holder.personname  = (TextView)  convertView.findViewById(R.id.personname);
            holder.date        = (TextView)  convertView.findViewById(R.id.date);
            holder.ratingsmall = (RatingBar) convertView.findViewById(R.id.ratingsmall);
            holder.more = ( LinearLayout ) convertView.findViewById(R.id.more);

      }
      else
       {
            holder = (ViewHolder) convertView.getTag();
       }

           //hide More information
           holder.more.setVisibility(View.GONE); 

          try {
            Date date_g = new Date(r.getLong("timestamp") * 1000);
            holder.date.setText(date_g.toLocaleString());
            } catch (JSONException e2) {}

           //set person name
            try {
                String client_name = ( r.getString("personname").equals( "null" ) == true ) ? "ghost" : r.getString("personname");
                holder.personname.setText(client_name);
            } catch (JSONException e2) {}

            //set total votars and vote avarage
            try {
                float z = (float) r.getInt("rate");
                holder.voters.setText(" ( "+ r.getLong("voters") +" ) / " + z);
            } catch (JSONException e2) {}            
            //set rating bar
            try {
                float z = (float) r.getInt("rate");
                holder.ratingsmall.setRating(z);
            } catch (JSONException e2) {}           
            //set ringtone Name as defualt device language
            try {
                String name = ( lang.equals( "English" ) == true ) ?  r.getString("en_name") : r.getString("ar_name");
                holder.rtitle.setText(name);
            } catch (JSONException e2) {}

            //ringtone file size
            try {
                holder.size.setText(r.getString("size"));
            } catch (JSONException e2) {}

            //set downloads
            try {
                holder.downloads.setText(String.valueOf( r.getLong("downloads") ));
            } catch (JSONException e2) {}

            //set ringtone ID toneid
            try {
                  holder.tonid = r.getLong("toneid");
                  holder.download.setTag(r.getLong("toneid"));
                  holder.ratebutton.setTag(r.getLong("toneid"));
                  holder.play.setId((int) r.getLong("toneid"));
                  convertView.setId((int) r.getLong("toneid"));

               } catch (JSONException e1) {}

            //set download stram url to play icon
            try {
                holder.play.setTag(r.getString("stream_url"));
            } catch (JSONException e) {}

            //add play listener test Ringtone before download it
            holder.play.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(final View v) {

                    clickedposition=position;
                    boolean playit = false;

                     v.setMinimumHeight(200);

                     //stop Media player dont play any thing
                     if ( mp != null )
                     {
                         mp.stop();
                         mp.release();
                         mp = null;
                     }

                     //check for last clicked item
                     if ( vv != null )
                     {
                         //set last played item to play icon
                         vv.setBackgroundResource(R.drawable.play); 

                         //check if last played is not smae clicked item
                         if( v.getTag().toString().equals( vv.getTag().toString() ) == false )
                         {
                             playit = true; 
                         }else
                        //its same item dont play stop here  
                         {
                             vv     = null;
                         }
                     }else
                    //nothing played yet play it
                     {
                         playit = true; 
                     }


                     if ( playit )
                     {

                         vv = v;

                         v.setBackgroundResource(R.drawable.preparing_player); 


                         AnimationDrawable frameAnimation = (AnimationDrawable) v.getBackground();
                         frameAnimation.start();


                         String stramUrl = String.valueOf(v.getTag());


                         try {

                             mp = new MediaPlayer();
                             mp.setAudioStreamType(AudioManager.STREAM_MUSIC);   
                             mp.setDataSource(stramUrl);
                             mp.prepareAsync();


                         } catch (Exception e) {}


                         //preparing straming
                         mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {

                            @Override
                            public void onPrepared(MediaPlayer mps) {

                                 v.setBackgroundResource(R.drawable.played); 
                                 mps.start(); 
                            }
                        });

                        mp.setOnCompletionListener( new MediaPlayer.OnCompletionListener() {

                            @Override
                            public void onCompletion(MediaPlayer mp) {
                                 v.setBackgroundResource(R.drawable.play); 
                            }
                        });

                     }          




                }
            });




        return convertView;
    }

}

Answer 1

ListView 出于性能原因将回收 View ，它每次都会使用您的第一个膨胀 View ，因此当您展开它和向下滚动时，其他 View 也会使用相同的布局，您将能够看到扩展的 View 。

编辑:

设置

vv.setBackgroundResource(R.drawable.play);//当您没有在 getView() 中单击播放按钮时的默认图像

我认为一次只会播放一首歌曲，因此需要一个 int 来跟踪已单击的 Imageview

像这样

整数点击位置；将其作为一个字段，然后

在单击play ImageView 时的getView()中，将其位置设置为clickedposition。

clickedposition=position;

在 getview 中这样检查

if(clickedposition!=null)
{
 v.setBackgroundResource(R.drawable.played); 
}

编辑:

int checkposition=-1;

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

           holder.play.setBackgroundResource(R.drawable.play);
           if(checkposition!=-1)
          {
           holder.play.setBackgroundResource(R.drawable.played); 
           }


        return convertView;
    }