Android自定义列表适配器实现侦听器

Question

实现侦听器的自定义视图适配器的问题形成按钮和计时器。 当第一次填充列表时，一切正常（我可以点击播放按钮，看到计时器工作正常）。但当我滚动到其他项目并返回第一个元素时，按钮监听器将无法工作，计时器将重置为0并停止收听tickEvent。

请参阅以下代码段：

<!-- language: lang-java -->

public class PodcastListAdapter extends BaseAdapter implements OnPreparedListener, Runnable, OnChronometerTickListener{

MediaPlayer mediaPlayer;
 Button start , stop , pause;
 private List<Button> starts, stops, pauses;
 TextView mobi ;
 Chronometer chrono;
 private List<Integer> usedPositions  = new ArrayList<Integer>();



 private static ProgressBar progressBar;
private List<Message> messageList;
private List<ProgressBar> progressBars;
private List<Chronometer> chronos;

private Context context;

public PodcastListAdapter(List<Message> tweetList, Context context) {
    this.messageList = tweetList;
    this.context = context;
    this.progressBars=new LinkedList<ProgressBar>();
    this.chronos=new LinkedList<Chronometer>();
    this.starts=new LinkedList<Button>();
    this.stops=new LinkedList<Button>();
    this.pauses=new LinkedList<Button>();
    IPlayerService myService=(IPlayerService) RadioTab.getPlayerServiceConnection().getMyService();
    myService.setPListener(this);

}

public int getCount() {
    // TODO Auto-generated method stub
    return messageList.size();
}

public Message getItem(int position) {
    // TODO Auto-generated method stub
    return messageList.get(position);

}

public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
}

public View getView(final int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    //LinearLayout itemLayout;
    RelativeLayout itemLayout;
    //ProgressBar progressBar;
     Log.d("debog", "onPrepared"+position);

    final Message message = messageList.get(position);

    itemLayout= (RelativeLayout) LayoutInflater.from(context).inflate(R.layout.podcastmessage, parent, false);
    TextView tvDate = (TextView) itemLayout.findViewById(R.id.PodcastDate);
    tvDate.setText(message.getDate());

    TextView tvCategory = (TextView) itemLayout.findViewById(R.id.PodcastCategory);
    tvCategory.setText(message.getCategory());
    //progress Bar
    progressBar = (ProgressBar) itemLayout.findViewById(R.id.progressBar);
    progressBar.setTag(position);
    progressBars.add(position,progressBar);
    //progressBar.setMax(100);
    //progressBar.setProgress(50);
    //progress Bar Fin



    //récupérer le buttons
    start=(Button) itemLayout.findViewById(R.id.play_pc);

    start.setTag(position);
    starts.add(position,start);
    //associer les listners
      start.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {

                int pos=(Integer) v.getTag();
                starts.get(pos).setEnabled(false);
              stops.get(pos).setEnabled(true);
              pauses.get(pos).setEnabled(true);
              //start.setEnabled(false);
              startStreamingAudio(messageList.get(pos).getLink().toString(),pos) ;
              Log.d("StreamingAudio", "StartEvent");
              Toast.makeText(context.getApplicationContext(), "Veuillez attendre le chargement... ", 3000).show();


            }   
    });

    stop=(Button)itemLayout.findViewById(R.id.stop_pc); 
    stop.setTag(position);
      stops.add(position,stop);
      stop.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {

                int pos=(Integer) v.getTag();

                stopStreamingAudio(pos);
                starts.get(pos).setEnabled(true);
                 stops.get(pos).setEnabled(false);
                 pauses.get(pos).setEnabled(false);


                  Log.d("StreamingAudio", "StopEvent");

            } 
    });  

      pause=(Button)itemLayout.findViewById(R.id.pause_pc);

    pause.setTag(position);
      pauses.add(position,pause);
      pause.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            int pos=(Integer) v.getTag();
            pauseStreamingAudio();
            starts.get(pos).setEnabled(true);
            pauses.get(pos).setEnabled(false);
            stops.get(pos).setEnabled(true);

        }
    });

      //chronometre
      chrono=(Chronometer) itemLayout.findViewById(R.id.chrono);
      chrono.setTag(position);
      chrono.setOnChronometerTickListener(this);
      chronos.add(position,chrono);






    if(position%2==0)
    {

        //itemLayout.setBackgroundResource(R.drawable.cellule);
        itemLayout.setBackgroundColor(Color.rgb(134, 137, 142));
        //ImageView iv=(ImageView) itemLayout.findViewById(R.id.bg_cellule);
        //iv.setVisibility(4);
        tvCategory.setTextColor(Color.WHITE);
        tvDate.setTextColor(Color.WHITE);

    }



    return itemLayout;
}
protected void pauseStreamingAudio() {
    // TODO Auto-generated method stub
    IPlayerService myService=(IPlayerService) RadioTab.getPlayerServiceConnection().getMyService();
    myService.pause();

}

private void startStreamingAudio(String link, int position) {

     IPlayerService myService=(IPlayerService) RadioTab.getPlayerServiceConnection().getMyService();

     if(myService.isPaused())
     {
         myService.start();
         chrono=chronos.get(position);
         chrono.start();

         return;
     }

    if(myService.isPlaying())
    {
        Log.d("startStream", "Stop");
        myService.stop();
    }
    //préparation du lien (insérer %20 dans le nom du fichier)

    link=link.replaceAll("\\s", "%20");
    Log.d("ListAdapter", link);


    myService.setSource(link);

    //myService.start();

    //myService.setProgressBar(progressBar);
    progressBar=progressBars.get(position);
    myService.setProgressBar(progressBar);
    progressBar.setVisibility(ProgressBar.VISIBLE);
    progressBar.setProgress(0);
    progressBar.setMax(myService.getDuration());
    //new Thread(this).start();//fo progress bar
    //progressBar.setMax(100);
    //progressBar.setProgress(50);
    chrono=chronos.get(position);
    //chrono.setBase(SystemClock.elapsedRealtime());


    //chrono.start();
    Log.d("duration", String.valueOf(myService.getDuration()));



}


private void stopStreamingAudio(int position) {

    IPlayerService myService=(IPlayerService) RadioTab.getPlayerServiceConnection().getMyService();

    Log.d("stopStream","isplaying"+myService.isPlaying());
    if(myService.isPlaying())
    {

        myService.stop();
        //myService.getProgressBar().setProgress()
        //chrono=chronos.get(position);
        //chrono.stop();


    }
    else if(myService.isPaused())
    {

        myService.stop();
        //myService.getProgressBar().setProgress()
        //chrono=chronos.get(position);
        //chrono.stop();


    }
    //chrono.setText("00:00");

}


public void run() {
IPlayerService myService=(IPlayerService) RadioTab.getPlayerServiceConnection().getMyService();
int currentPosition= 0;
int total = myService.getDuration();

Log.d("run", "dans le thread"+total+myService.isPlaying());
while (myService.isPlaying()/* && currentPosition<total*/) {
    try {
        Thread.sleep(1000);
        Log.d("run", "while dans le thread");
        currentPosition= myService.getPosition();
        Log.d("currentPosition", String.valueOf(currentPosition));

    } catch (InterruptedException e) {
        return;
    } catch (Exception e) {
        return;
    }
    //progressBar=myService.getProgressBar();
    //progressBar.setProgress(currentPosition);
    if(myService.getProgressBar()!=null)
    myService.getProgressBar().setProgress(currentPosition);
    //Log.d("getProgress", String.valueOf(myService.getPosition()));
    //Log.d("getDuration", String.valueOf(myService.getDuration()));
}
if(myService.getProgressBar()!=null)
myService.getProgressBar().setProgress(0);
}

public void onChronometerTick(Chronometer chronometer) {
// TODO Auto-generated method stub
IPlayerService myService=(IPlayerService) RadioTab.getPlayerServiceConnection().getMyService();

//Log.d("chrono", "chronotick");
//Log.d("chrono", ""+myService.getPosition());

if(myService.isPaused()) chronometer.stop();
else if(myService.isPlaying())
{
    String m,s,currentTime;
    long minutes=((myService.getPosition())/1000)/60;

    if(minutes<10) m="0"+minutes;
    else m=String.valueOf(minutes);
    long seconds=((myService.getPosition())/1000)%60;
    if(seconds<10) s="0"+seconds;
    else s=String.valueOf(seconds);

    currentTime=m+":"+s;
    chronometer.setText(currentTime);

    /*chronometer.setEms(myService.getPosition())*/;
}
else { chronometer.stop(); chronometer.setText("00:00");}

}

public void onPrepared(MediaPlayer mp) {
// TODO Auto-generated method stub
IPlayerService myService=(IPlayerService) RadioTab.getPlayerServiceConnection().getMyService();
myService.start();
new Thread(this).start();
chrono.start();

}
}

Answer 1

你可以在下面执行此操作

package com.CommonMethod.Activity;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

public class ListViewDemo2 extends Activity {
    ListView LS;
    LayoutInflater Linflater;

    public static LinearLayout LL;
    public static TextView txtOne;
    public static TextView txtTwo;
    public static Button btnone;
    public static Button btnTwo;
    public static Button btnThree;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.listviewdemo);
        LS = (ListView) findViewById(R.id.LSOne);

        Linflater = (LayoutInflater) this
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        LS.setAdapter(new ListAdapter(this));

    }

    public class ListAdapter extends BaseAdapter {

        public ListAdapter(Context con) {

        }

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return 10;
        }

        @Override
        public Object getItem(int position) {
            // TODO Auto-generated method stub
            return null;
        }

        @Override
        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return 0;
        }

        @Override
        public int getViewTypeCount() {
            // TODO Auto-generated method stub
            return 10;
        }

        @Override
        public int getItemViewType(int position) {
            // TODO Auto-generated method stub
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            View ReturnView = convertView;
            int _intPostion = getItemViewType(position);

            if (ReturnView == null) {
                ReturnView = Linflater.inflate(R.layout.rawlistview2, null);
                LL = (LinearLayout) ReturnView.findViewById(R.id.LLOne);
                txtOne = (TextView) ReturnView
                        .findViewById(R.id.textView1list2);
                txtTwo = (TextView) ReturnView.findViewById(R.id.textViewlist2);

                btnone = (Button) ReturnView.findViewById(R.id.button1);
                btnTwo = (Button) ReturnView.findViewById(R.id.button2);
                btnThree = (Button) ReturnView.findViewById(R.id.button3);

                btnone.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Log.i("ButtonOne", btnone.getText().toString());
                    }
                });
                btnTwo.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Log.i("ButtonTwo", btnTwo.getText().toString());
                    }
                });
                btnThree.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Log.i("ButtonThree", btnThree.getText().toString());
                    }
                });
            }
            return ReturnView;
        }
    }
}