Question

每次我滚动Recyclerview中的顺序时，都会更改。我不知道为什么会这样。

//-----VIEWHOLDER-------------------------
public class CrimeHolder extends RecyclerView.ViewHolder implements View.OnClickListener{

    private Crime mCrime;
    String Tag = "Crime_list";

    //-------function for displaying title name---------------
    public void bind(Crime crime) {

        mCrime = crime;
        System.out.println(crime.getmTitle());
        Log.d(Tag,"crime number is :"+ crime.getmTitle());
        mTitle_TextView.setText(mCrime.getmTitle());
        mDate_TextView.setText(mCrime.getmDate().toString());

    }
    public CrimeHolder(LayoutInflater inflater, ViewGroup parent) {

        super(inflater.inflate(R.layout.list_item_crime,parent,false));
        itemView.setOnClickListener(this);
        mTitle_TextView = (TextView) itemView.findViewById(R.id.crime_title);
        mDate_TextView = (TextView)itemView.findViewById(R.id.crime_date);

    }

    @Override
    public void onClick(View v) {
        Toast.makeText(getActivity(),mCrime.getmTitle() +" clicked!",Toast.LENGTH_SHORT).show();        }
}

//----ADAPTER------------------------
public class CrimeAdapter extends RecyclerView.Adapter<CrimeHolder> {

    private List<Crime> mCrimes;

    public CrimeAdapter(List<Crime> crimes) {
        mCrimes = crimes;
    }
    @NonNull
    @Override
    public CrimeHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        LayoutInflater layoutInflater = LayoutInflater.from(getActivity());
        return new CrimeHolder(layoutInflater,viewGroup);
    }

    @Override
    public void onBindViewHolder(@NonNull CrimeHolder crimeHolder, int i) {
        Crime crime = mCrimes.get(i);
        crimeHolder.bind(crime);
    }

    @Override
    public int getItemCount() {
        return mCrimes.size();
    }

While clicking on the title it is showing the correct output even in the log it is showing the correct output, only the title names are getting changed. Please click on this link to see the image.

我尝试在Logcat中获得输出（在函数bind中），那里也显示了正确的输出。 getTitle在Viewholder中的函数bind中。 Toast在单击标题时也显示正确的输出，当我滚动标题时，标题名称将不断更改。顺序就像犯罪＃0，犯罪＃1，...，犯罪＃13，它将以正确的顺序显示，但是一旦我滚动几次，这些标题将不断重复，犯罪＃14将不断变化（更像是波动）不同的数字）。

谢谢

每次滚动时，Recyclerview中的列表顺序都会更改？

0 个答案: