更新播放，暫停按鈕在列表視圖

Question

我有一個列表視圖，其中有圖像，標題，選項和播放/暫停按鈕。當我單擊一行中的播放按鈕，然後單擊另一行中的播放按鈕時，兩個按鈕的背景都保持暫停。所以我希望當我點擊連續的播放按鈕，然後點擊另一行的播放按鈕時，第一個按鈕的背景應該變爲播放，而第二個的背景應該保持暫停。在此先感謝

下面是代碼

公共類MyAdapter延伸BaseAdapter {

int itemnum; 
    Boolean playing = false; 
    Context context; 
    int layoutResourceId;  

    // RingTone data[] = null; 
    private LayoutInflater mInflater; 

    String[] Title; 
    int[] Img; 

    ListView listview; 






    public MyAdapter(Context context, int layoutResourceId, String[] Title,int[] Img, int[] Tone, ListView listview) { 
     mInflater = LayoutInflater.from(context); 
     this.layoutResourceId = layoutResourceId; 
     this.context = context; 
     this.Title=Title; 
     this.Img=Img; 
     ListActivity.Tone=Tone; 
     this.listview=listview; 



    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     View row = convertView; 
     RingToneHolder holder = null; 


     if (convertView == null) { 
      convertView = mInflater.inflate(R.layout.listrow, null); 


     } 


     holder = new RingToneHolder(); 
     // RingTone aa = data[position]; 
     holder.imgIcon = (ImageView)convertView.findViewById(R.id.list_image); 
     holder.txtTitle = (TextView)convertView.findViewById(R.id.title); 
     holder.playbtn = (Button)convertView.findViewById(R.id.playbtn); 
     holder.btn_alert_dialog = (Button)convertView.findViewById(R.id.alert_dialog_btn); 
     holder.pausebtn = (Button)convertView.findViewById(R.id.pausebtn); 


     holder.txtTitle.setText(Title[position]); 
     // holder.txtTitle.setText(aa.title); 
     holder.imgIcon.setImageResource(Img[position]); 
     //holder.playbtn.setInputType(aa.btn);S 
     holder.playbtn.setTag(position); 
     holder.btn_alert_dialog.setTag(position); 



     holder.playbtn.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View arg0) { 

       // TODO Auto-generated method stub 
       if(mp == null){ 

        listview.invalidateViews(); 
        mp = MediaPlayer.create(context,Tone[Integer.parseInt(arg0.getTag().toString())]); 

        mp.start(); 
        playing = true; 
        itemnum = Integer.parseInt(arg0.getTag().toString()); 
        //Toast.makeText(context, "ist playing", Toast.LENGTH_LONG).show(); 
        arg0.setBackgroundResource(R.drawable.pause); 

       } 
       else { 
        if(mp.isPlaying() && itemnum == Integer.parseInt(arg0.getTag().toString())){ 
         listview.invalidateViews(); 
         mp.pause(); 
         playing = false; 
         //Toast.makeText(context, " paused", Toast.LENGTH_LONG).show(); 
         arg0.setBackgroundResource(R.drawable.play_btn); 
        } 
        else{ 
         if(playing == false && itemnum == Integer.parseInt(arg0.getTag().toString())){ 
          listview.invalidateViews(); 
          mp.start(); 
          playing = true; 
          arg0.setBackgroundResource(R.drawable.pause); 
         } 
         else { 
          //.invalidate(); 
          listview.invalidateViews(); 
          mp.stop(); 
          mp.release(); 
          mp = MediaPlayer.create(context,Tone[Integer.parseInt(arg0.getTag().toString())]); 
          mp.start(); 
          playing = true; 
          itemnum = Integer.parseInt(arg0.getTag().toString()); 
          //Toast.makeText(context, "playing", Toast.LENGTH_LONG).show(); 
          arg0.setBackgroundResource(R.drawable.pause); 
         } 
        } 
       } 

      } 


     }); 

Answer 1

只更改該行的繪製被點擊。

保持當前正在播放的行的指針/索引，以便下次啓動onClick（）時，知道以前播放的是哪行。所以，去改變那一行的drawable。