public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private String[] mDatasetname;
private Integer[] mexp;
Context context;
public ToggleButton select;
Integer selectedcountint=0;
private Bitmap[] mpro;
private String[] mloc;
private String[] mobj;
private String[] mselected;
public ArrayList<String> nselected = new ArrayList<>();
public static class MyViewHolder extends RecyclerView.ViewHolder{
public CardView mCardView;
public TextView mTextView;
public TextView texp;
public Button pdf;
public ToggleButton select;
public ImageView pro;
public TextView loc;
public MyViewHolder(View v){
super(v);
mCardView = (CardView) v.findViewById(R.id.card_view);
mTextView = (TextView) v.findViewById(R.id.tv_text);
texp = (TextView) v.findViewById(R.id.setexp);
pdf = (Button) v.findViewById(R.id.moreinfo);
select = (ToggleButton) v.findViewById(R.id.select);
pro = (ImageView) v.findViewById(R.id.setpropic);
loc = (TextView) v.findViewById(R.id.setlocation);
}
}
public MyAdapter(String[] myDataset,Integer[] exp,Bitmap[] pro,String[] loc,String[] obj){
mDatasetname = myDataset;
mexp=exp;
mpro=pro;
mloc=loc;
mobj=obj;
}
@Override
public MyAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType){
context=parent.getContext();
View vs = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_item, parent, false);
MyViewHolder vh = new MyViewHolder(vs);
return vh;
}
@Override
public void onBindViewHolder(final MyViewHolder holder, final int position){
holder.mTextView.setText(mDatasetname[position]);
holder.texp.setText(String.valueOf(mexp[position])+" yrs");
holder.pro.setImageBitmap(mpro[position]);
holder.loc.setText(mloc[position]);
holder.select.setText("rejected");
holder.pdf.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent();
intent = new Intent(context, PdfViewer.class);
intent.putExtra("obj",mobj[position]);
context.startActivity(intent);
}
});
holder.select.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked==true) {
holder.select.setChecked(true);
holder.select.setText("selected");
nselected.remove(mobj[position]+",rejected");
nselected.add(mobj[position]+",selected");
Log.d("dei", String.valueOf(nselected));
selectedcountint=selectedcountint+1;
Intent intent = new Intent("custom-message");
// intent.putExtra("quantity",Integer.parseInt(quantity.getText().toString()));
Bundle args = new Bundle();
args.putSerializable("ARRAYLIST",(Serializable)nselected);
intent.putExtra("BUNDLE",args);
intent.putExtra("totalval",selectedcountint);
LocalBroadcastManager.getInstance(context).sendBroadcast(intent);
} else {
holder.select.setChecked(false);
holder.select.setText("rejected");
nselected.remove(mobj[position]+",selected");
nselected.add(mobj[position]+",rejected");
Log.d("dei", String.valueOf(nselected));
selectedcountint=selectedcountint-1;
Intent intent = new Intent("custom-message");
// intent.putExtra("quantity",Integer.parseInt(quantity.getText().toString()));
Bundle args = new Bundle();
args.putSerializable("ARRAYLIST",(Serializable)nselected);
intent.putExtra("BUNDLE",args);
intent.putExtra("totalval",selectedcountint);
LocalBroadcastManager.getInstance(context).sendBroadcast(intent);
}
}
});
}
@Override
public int getItemCount() { return mDatasetname.length; }
}
我的应用程序中有一个回收站视图。我有问题。有一个项目，因此当我单击项目a时，将执行单击b中的功能。当您为我清理下面的代码时，这非常好，因为我是编程新手，所以我将无法解决问题。
答案 0 :(得分：1)
if(getAdapterPosition() != RecyclerView.NO_POSITION) {
...
mobj[getAdapterPosition()]
...
}
答案 1 :(得分：0)
最好在ViewHolder中设置数据和侦听器。您应该在ViewHolder类中创建一个方法，并将列表中的项目作为参数传递给该方法。在这种方法中，您将复制所有用于设置文本和侦听器的代码。然后在onBindViewHolder中调用此方法。
首先创建一个将成为适配器项的类（您应该更改字段名称，因为我不知道它们应该代表什么，这只是一个示例）：
class AdapterItem {
private String firstString;
private Integer integerValue;
private Bitmap bitmap;
private String secondString;
private String thirdString;
// create also getters, setters for fields
}
您的适配器构造函数将如下所示：
public MyAdapter(ArrayList<AdapterItem> data){
this.data = data;
}
还有onBindViewHolder方法：
@Override
public void onBindViewHolder(final MyViewHolder holder, final int position){
holder.bind(data[position]);
}
在ViewHolder类中：
void bind(AdapterItem item) {
mTextView.setText(item.getFirstString());
pdf.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(context, PdfViewer.class);
intent.putExtra("obj", item.getThirdString());
v.getContext().startActivity(intent);
}
});
}
答案 2 :(得分：0)
@andrei正确指出的从obj []数组中获取正确字符串的代码应如下所示：
public MyAdapter(Context context, String[] myDataset,Integer[] exp,Bitmap[] pro,String[] loc,String[] obj){
mContext = context; // make mContext as a variable like others
mDatasetname = myDataset;
mexp=exp;
mpro=pro;
mloc=loc;
mobj=obj;
}
holder.pdf.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent();
intent = new Intent(context, PdfViewer.class);
intent.putExtra("obj",mobj[holder.getAdapterPosition()]);
mContext.startActivity(intent);
}
});
并类似地将所有出现的position替换为holder.getAdapterPosition()，因为holder.getAdapterPosition()会始终为您提供代码中的回收站视图项目的更新位置，就好像您在不使用任何代码的情况下更新或删除项目一样使用notifyDataSetChanged()方法将不会再次调用onBindViewHolder，因此位置将变得不一致。有关详细信息，请参阅此answer。
答案 3 :(得分：0)
公共类MyAdapter扩展了RecyclerView.Adapter {
private String[] mDatasetname;
private Integer[] mexp;
private Context context;
public ToggleButton select;
Integer selectedcountint=0;
private Bitmap[] mpro;
private String[] mloc;
private String[] mobj;
public Button pdf;Context m;private String[] mselected;
public ArrayList<String> nselected = new ArrayList<>();
public static class MyViewHolder extends RecyclerView.ViewHolder{
public CardView mCardView;
public TextView mTextView;
public TextView texp;
public Button pdf;
public ToggleButton select;
public ImageView pro;
public MainActivity activity;
public Context ipaset;
public TextView loc;
public View layout;
View forresumeview;
String forresume;
private RecyclerView.ViewHolder s;
public MyViewHolder(final View v) {
super(v);
mCardView = (CardView) v.findViewById(R.id.card_view);
mTextView = (TextView) v.findViewById(R.id.tv_text);
texp = (TextView) v.findViewById(R.id.setexp);
pdf = (Button) v.findViewById(R.id.moreinfo);
select = (ToggleButton) v.findViewById(R.id.select);
pro = (ImageView) v.findViewById(R.id.setpropic);
loc = (TextView) v.findViewById(R.id.setlocation);
forresumeview=v;
}
void bind(String name, Integer exp, String location, final Bitmap image, final String obj ){
mTextView.setText(name);
texp.setText(String.valueOf(exp) + " yrs");
pro.setImageBitmap(image);
loc.setText(location);
}
public void doonce(final String s){
pdf.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View vs) {
Intent intent = new Intent(forresumeview.getContext(), PdfViewer.class);
intent.putExtra("obj", s);
forresumeview.getContext().startActivity(intent);
// Log.d("sdasd", obj);
}
});
}
}
public MyAdapter(String[] myDataset,Integer[] exp,Bitmap[] pro,String[] loc,String[] obj){
mDatasetname = myDataset;
mexp=exp;
mpro=pro;
mloc=loc;
mobj=obj;
}
@Override
public MyAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType){
context=parent.getContext();
View vs = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_item, parent, false);
MyViewHolder vh = new MyViewHolder(vs);
return vh;
}
@Override
public void onBindViewHolder(final MyViewHolder holder, final int position){
holder.bind(mDatasetname[position],mexp[position],mloc[position],mpro[position],mobj[position]);
holder.doonce(mobj[position]);
}
@Override
public int getItemCount() { return mDatasetname.length; }
}
这是答案，，，，我尝试过了！！！编码愉快......