我的 Listview 有重复问题，我有分页 listview 一切正常，但问题是当向下滚动并附加新项目时，新项目操作与旧项目重复
例子 ：
如果我点击第 11 项，第 11 项和第 1 项都会展开
我在我的视图中搞砸了什么！
将新项目附加到适配器的 AsyncTask
public class ringtones extends AsyncTask<String,String, String> {
JSONObject data = null;
String response = null;
Dialog dialog;
@Override
protected void onPreExecute() {
dialog = new Dialog(Ringtones.this);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.dialog);
dialog.setCancelable(false);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
dialog.show();
appendMore = false;
}
@Override
protected String doInBackground(String... params) {
Log.e("Ring ListView" ,"in Background");
if ( applysort == true )
{
page = 1;
}
if ( query.trim().equals("") == false && appendMore == false)
{
page = 1;
}
response = Api.getringtonesList("&page="+page+"&limit="+limit+"&q="+query+"&sortby="+sortby);
return response;
}
@Override
protected void onPostExecute(String result) {
dialog.dismiss();
if ( response != null )
{
if ( query.trim().equals("") == false && appendMore == false)
{
la.clear();
la.notifyDataSetChanged();
}
if ( applysort == true )
{
la.clear();
la.notifyDataSetChanged();
applysort = false;
}
try {
data = new JSONObject(result);
int last_page = data.getInt("last_page");
try {
// Getting Array of Contacts
JSONArray files = data.getJSONArray("ringtones");
Toast.makeText(context, "found " + files.length(), 0).show();
if ( files.length() != 0 )
{
for(int i = 0; i < files.length(); i++)
{
//extract file info
JSONObject f = files.getJSONObject(i);
tonebit.add(f);
}
}
} catch (JSONException e) {
e.printStackTrace();
Log.e("Ring ListView" ,"Faild get Json ringtones : "+e.getMessage());
}
if ( last_page > page )
{
appendMore = true;
page++;
}
la.notifyDataSetChanged();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.e("Ring ListView" ,"Faild convert String to Json : "+e.getMessage());
}
}
}
}
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();
public Ringtones_Listview(Context context, int resource, List objects) {
super(context, resource, objects);
this.context = context;
this.resource = resource;
mInflater = LayoutInflater.from(context);
}
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;
}
public View getView(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);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
//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(onClickListener);
convertView.setTag(holder);
return convertView;
}
private OnClickListener onClickListener = new OnClickListener() {
@Override
public void onClick(final View v) {
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);
}
});
}
}
};
}