我有一个RecyclerView。每行都有一个播放按钮，textview和Progressbar。单击播放按钮时必须播放我的SD卡中的音频并且必须进度Progressbar问题是当我向下滚动recyclerview时，请更改下一行中的Progressbar。意思是我可以同时在屏幕上显示5个项目。当我滚动到第6行，第6行搜索栏突然改变。
public class ListAdapter extends RecyclerView.Adapter {
private List<Historyitem> stethitems;
public Context mContext;
public Activity activity;
public Handler mHandler;
static MediaPlayer mPlayer;
static Timer mTimer;
public ListAdapter(Activity activity,Context mContext,List<Historyitem> stethitems) {
this.stethitems = stethitems;
this.mContext = mContext;
this.activity = activity;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View rootView = LayoutInflater.
from(mContext).inflate(R.layout.stethoscopeadapteritem, null, false);
RecyclerView.LayoutParams lp = new RecyclerView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
rootView.setLayoutParams(lp);
mHandler = new Handler();
return new MyViewHolder(rootView);
}
@Override
public void onBindViewHolder(final RecyclerView.ViewHolder viewHolder, int position) {
final Historyitem dataItem = stethitems.get(position);
final MyViewHolder myViewHolder = (MyViewHolder) viewHolder;
myViewHolder.progressplay.setProgress(0);
myViewHolder.stethdatetime.setText(dataItem.getReported_Time());
myViewHolder.stethhosname.setText(dataItem.getdiv());
if(dataItem.getPatient_Attribute().replaceAll(" ","").equals("")){
myViewHolder.stethdoctorname.setText(dataItem.getunit());
} else {
myViewHolder.stethdoctorname.setText(dataItem.getPatient_Attribute());
}
myViewHolder.stethstreamplay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
FileDownload(dataItem.getmsg(),
myViewHolder.progressplay);
}
});
}
@Override
public int getItemCount() {
return stethitems.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
final CustomTextRegular stethdatetime;
final CustomTextView stethhosname;
final CustomTextBold stethdoctorname;
final ImageButton stethstreamplay;
final NumberProgressBar progressplay;
public MyViewHolder(View itemView) {
super(itemView);
stethdatetime = (CustomTextRegular)
itemView.findViewById(R.id.stethdatetime);
stethhosname = (CustomTextView)
itemView.findViewById(R.id.stethhosname);
stethdoctorname = (CustomTextBold)
itemView.findViewById(R.id.stethdoctorname);
stethstreamplay = (ImageButton)
itemView.findViewById(R.id.stethstreamplay);
progressplay= (NumberProgressBar)
itemView.findViewById(R.id.progressplay);
}
}
public void FileDownload(final String downloadpath,
final NumberProgressBar progressplay) {
new AsyncTask<NumberProgressBar, Integer, NumberProgressBar>() {
NumberProgressBar progress;
@Override
protected void onPreExecute() {
super.onPreExecute();
try {
if(mPlayer!=null){
mPlayer.stop();
}
}catch (Exception e){
}
try {
if(mTimer != null){
mTimer.purge();
mTimer.cancel();
}
}catch (Exception e){
}
}
@Override
protected NumberProgressBar doInBackground(NumberProgressBar... params) {
int count;
progress = progressplay;
try {
final List<NameValuePair> list = new ArrayList<NameValuePair>();
list.add(new BasicNameValuePair("pid",id));
URL url = new URL(Config.requestfiledownload + "?path=" +
downloadpath);
URLConnection connection = url.openConnection();
connection.connect();
int lenghtOfFile = connection.getContentLength();
// download the file
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new FileOutputStream(Environment.getExternalStorageDirectory() +
"record.wav");
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
publishProgress((int) (total * 100 / lenghtOfFile));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (Exception e) {
}
return progress;
}
@Override
protected void onPostExecute(final NumberProgressBar numberProgressBar) {
super.onPostExecute(numberProgressBar);
try {
StartMediaPlayer(numberProgressBar);
} catch (Exception e){
e.printStackTrace();
}
}
}.execute();
}
public void StartMediaPlayer(final NumberProgressBar progressbar){
Uri playuri = Uri.parse("file:///sdcard/record.wav");
mPlayer = new MediaPlayer();
mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mPlayer.reset();
try {
mPlayer.setDataSource(mContext, playuri);
} catch (IllegalArgumentException e) {
} catch (SecurityException e) {
} catch (IllegalStateException e) {
} catch (Exception e) {
}
try {
mPlayer.prepare();
} catch (Exception e) {
}
mPlayer.start();
progressbar.setMax(mPlayer.getDuration());
mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
if(mPlayer!=null) {
mPlayer.release();
progressbar.setProgress(0);
}
if(mTimer != null){
mTimer.purge();
mTimer.cancel();
}
}
});
mTimer = new Timer();
mTimer.schedule(new TimerTask() {
@Override
public void run() {
mHandler.post(new Runnable() {
@Override
public void run() {
progressbar.setProgress(mPlayer.getCurrentPosition());
}
});
}
},0,500);
}}
这是recyclerView的预期行为。由于视图已被回收，因此您的商品可能会进入随机视图。要解决这个问题，您必须自己指定将哪个项目放入哪种视图中。此信息可以保存在SparseBooleanArray中。你可以做的是像你这样在你的适配器中创建一个SparseBooleanArray
SparseBooleanArray selectedItems = new SparseBooleanArray();
每当您的视图发生变化时，请执
selectedItems.put(viewItemIndex,true);
现在在你的onBindViewHolder上做
if(selectedItems.get(position, false)){
//set progress bar of related to the view to desired position
}
else {
//do the default
}
这是解决问题的基础。您可以将此逻辑调整为recyclerView中的任何类似问题。
我有类似的问题，并搜索了很多正确的答案。基本上它更像是一个循环器视图的设计，它更新了滚动视图，因为它刷新了视图。
所以你需要做的就是在绑定时告诉它不要刷新它。
这就是你的onBindViewHolder应该是这样的
@Override
@SuppressWarnings("unchecked")
public void onBindViewHolder(final BaseViewHolder holder, final int position) {
holder.bind(mList.get(position));
// This is the mighty fix of the issue i was having
// where recycler view was updating the items on scroll.
holder.setIsRecyclable(false);
}
把recylerView放在你的NestedScroll View的XML中并添加属性nestedScrollingEnabled = false。
在您的适配器onBindViewHolder添加此行
final MyViewHolder viewHolder = (MyViewHolder)holder;
将此viewHolder对象与setText的视图一起使用，或进行任何类型的点击事件。
例如viewHolder.txtSubject.setText("Example");
我在处理大量数据时遇到了同样的问题，它与5一起工作，因为它渲染了屏幕上可见的五个元素，但这给了概念更多的元素。事情是 ..
有时，RecyclerView和listView只会跳过填充数据。如果在滚动时跳过了RecyclerView绑定功能，但是当您尝试调试recyclerView适配器时，它将正常工作，因为它每次都会调用onBind，您还可以看到官方谷歌开发人员的视图The World of listView。大约20分钟-30分钟，他们将解释你永远不会假设每次都会调用getView的位置。
所以，我建议使用
RecyclerView DataBinder created by satorufujiwara.
要么
RecyclerView MultipleViewTypes Binder created by yqritc.
如果您发现这些易于解决的问题，可以使用其他粘合剂。
这是处理多视图类型或使用大量数据的方法。这些粘合剂可以帮助您仔细阅读文档，以解决它，和平！
你为什么不这样试，
HashMap<String, Integer> progressHashMap = new HashMap<>();
//...
if(!progressHashMap.containsKey(downloadpath)){
progressHashMap.put(downloadpath, mPlayer.getCurrentPosition());
}
progressbar.setProgress(progressHashMap.get(downloadpath));
试试这个
@Override public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state,
int position) { LinearSmoothScroller linearSmoothScroller =
new LinearSmoothScroller(recyclerView.getContext()) {
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
return LinearLayoutManager.this
.computeScrollVectorForPosition(targetPosition);
}
}; linearSmoothScroller.setTargetPosition(position); startSmoothScroll(linearSmoothScroller); }
此行在每个绑定上将进度更改为0
myViewHolder.progressplay.setProgress(0);
将其状态保存在某处，然后将其加载到同一行。
当我尝试实现包含edittex和复选框作为行元素的recyclerview时，我遇到了同样的问题。我只是通过在适配器类中添加以下两行来解决滚动值更改问题。
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getItemViewType(int position) {
return position;
}
我希望这将是一个可能的解决方案。谢谢