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[英]Android Displaying data from json to cardview in RecyclerView
[英]RecyclerView not displaying data on cardview properly (Android)?
我正在制作文件管理器,並且嘗試使用RecyclerView。 問題是recyclerview無法在cardview上正確顯示數據。 它會顯示隨機數據,有時還會在不同的Cardview上顯示相同的數據。 一些卡片視圖為空,不顯示任何數據。 我也沒有保存recyclerview的狀態。 數據隨機重復。 我正在片段中使用recyclerview。 有沒有辦法解決這個問題? 我是android中的新手開發人員。
public class FileInternalStorageRecyclerAdapter extends RecyclerView.Adapter<FileInternalStorageRecyclerAdapter.ViewHolder>{
Context context;
ArrayList<InternalStorageModel> fileList;
InternalStorageFragment.InternalStorageListener listener;
public FileInternalStorageRecyclerAdapter(Context context,ArrayList<InternalStorageModel> fileList, InternalStorageFragment.InternalStorageListener listener){
this.fileList=fileList;
this.listener=listener;
this.context=context;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
CardView cardView=(CardView) LayoutInflater.from(context).inflate(R.layout.file_internal_storage_recycler_adapter,parent,false);
return new ViewHolder(cardView);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
final CardView cv=holder.cardView;
final InternalStorageModel model=fileList.get(position);
if (model.fileIsDirectory){
if (model.fileName.startsWith(".")){
holder.imgLogo.setImageResource(R.drawable.ic_hidden_folder_36dp);
holder.txtName.setText(model.fileSimpleName+" ("+model.fileCountInDirectory+" )");
return;
}
holder.imgLogo.setImageResource(R.drawable.ic_folder_36dp);
holder.txtName.setText(model.fileSimpleName+" ("+model.fileCountInDirectory+" )");
}else if (model.fileIsFile){
if (model.fileName.startsWith(".")){
holder.imgLogo.setImageResource(R.drawable.ic_hidden_file_36dp);
holder.txtName.setText(model.fileSimpleName);
return;
}
holder.imgLogo.setImageResource(R.drawable.ic_file_36dp);
holder.txtName.setText(model.fileSimpleName);
}
cv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
try{
if (model.fileIsDirectory){
listener.navigationThroughFragment(model.fileAbsolutePath);
}else if (model.fileIsFile){
Intent intent=new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(model.fileAbsoluteFile),"*/*");
context.startActivity(Intent.createChooser(intent,"Complete action using..."));
}
}catch(Exception e){
e.printStackTrace();
}
}
});
}
@Override
public int getItemCount() {
return fileList.size();
}
class ViewHolder extends RecyclerView.ViewHolder{
private ImageView imgLogo;
private TextView txtName;
private CardView cardView;
private ViewHolder(CardView itemView) {
super(itemView);
cardView=itemView;
imgLogo=(ImageView)itemView.findViewById(R.id.imgLogo);
txtName=(TextView)itemView.findViewById(R.id.txtName);
}
}
}
我認為在某些情況下,如果模型項不是文件也不是目錄(符號鏈接?),那就麻煩了。
適配器必須為每個getView()調用重新綁定數據,否則,您將看到不相關的先前數據。 嘗試在模型不是文件而不是目錄的地方添加另一個else塊。
// your code as it was
// ...
} else if (model.fileIsFile) {
// ...
// your code as it was
// ...
} else {
holder.imgLogo.setImageResource(R.drawable.something);
holder.txtName.setText(model.fileSimpleName);
}
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