Question

我有一张RecyclerView，其中有许多牌可容纳4 EditText。当我在一张卡的EditText中输入值时，它会在随机卡中填充相同的值。令人惊讶的是，它不会跳转EditText例如：

如果我在edittext1的{{1}}中输入值，则会将相同的值填入card1中的edittext1，如果我更改card8中的值将更改card8中的值。有人可以告诉我为什么会这样。

提前感谢

这是我的代码：

card1

这是我的卡片xml

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {    
private String[] mDataset;
public String[][] data = new String[30][4];


public static class ViewHolder extends RecyclerView.ViewHolder {
     // each data item is just a string in this case
     public LinearLayout mCardView;

     public ViewHolder(LinearLayout v) {
        super(v);
        mCardView = v;
    }
}

// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(String[] myDataset) {
    mDataset = myDataset;
}

// Create new views (invoked by the layout manager)
@Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
                                               int viewType) {

    LinearLayout v = (LinearLayout) LayoutInflater.from(parent.getContext())
            .inflate(R.layout.cards, parent, false);

    ViewHolder vh = new ViewHolder(v);
    return vh;
}


// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder holder, final int position) {
    // - get element from your dataset at this position
    // - replace the contents of the view with that element
    final EditText txt = (EditText) holder.mCardView.findViewById(R.id.ip1_text);
    final EditText txt2 = (EditText) holder.mCardView.findViewById(R.id.ip2_text);

    final EditText txt3 = (EditText) holder.mCardView.findViewById(R.id.ip3_text);
    final EditText txt4 = (EditText) holder.mCardView.findViewById(R.id.ip4_text);
    txt.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            data[position][0] = s.toString();
            Log.d("DATA" + position + "0", s.toString());
        }
    });
    txt2.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            data[position][1] = s.toString();
            Log.d("DATA" + position + "1", s.toString());
        }
    });
    txt3.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            data[position][2] = s.toString();
            Log.d("DATA" + position + "2", s.toString());
        }
    });
    txt4.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            data[position][3] = s.toString();
            Log.d("DATA" + position + "3", s.toString());
        }
    });

    TextView t = (TextView) holder.mCardView.findViewById(R.id.serNo);
    t.setText(mDataset[position]);


}

// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
    return mDataset.length;
}

public String[][] getData() {
    return data;
}

Answer 1

这是因为RecyclerView内的观点正在被回收。在onBindViewHolder内，您需要将特定文本设置为特定位置的EditTexts。

在ViewHolder内初始化您的视图并在其中添加TextWatchers，因为RecyclerView的整个原则是重用视图：

public static class ViewHolder extends RecyclerView.ViewHolder {

    EditText txt;
    EditText txt2;
    EditText txt3;
    EditText txt4;

    TextView serNoTxt;

    public ViewHolder(LinearLayout mCardView) {
        super(mCardView);
        txt = (EditText) mCardView.findViewById(R.id.ip1_text);
        txt2 = (EditText) mCardView.findViewById(R.id.ip2_text);
        txt3 = (EditText) mCardView.findViewById(R.id.ip3_text);
        txt4 = (EditText) mCardView.findViewById(R.id.ip4_text);

        setNoTxt = (TextView) mCardView.findViewById(R.id.serNo);

        txt.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                data[getAdapterPosition()][0] = s.toString();
                Log.d("DATA" + getAdapterPosition() + "0", s.toString());
            }
            });
        txt2.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                data[getAdapterPosition()][1] = s.toString();
                Log.d("DATA" + getAdapterPosition() + "1", s.toString());
            }
        });
        txt3.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                data[getAdapterPosition()][2] = s.toString();
                Log.d("DATA" + getAdapterPosition() + "2", s.toString());
            }
        });
        txt4.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                data[getAdapterPosition()][3] = s.toString();
                Log.d("DATA" + getAdapterPosition() + "3", s.toString());
            }
        });
    }
}

将相应的文本设置为onBindViewHolder：

中的EditTexts

@Override
public void onBindViewHolder(ViewHolder holder, final int position) {
    holder.txt1.setText(data[position][0]);
    holder.txt2.setText(data[position][1]);
    holder.txt3.setText(data[position][2]);
    holder.txt4.setText(data[position][3]);

    holder.setNoTxt.setText(mDataset[position]);
}

Answer 2

您在未通知适配器的情况下更新了数据。这可能会造成不一致。因此，在更改数据后，您应该致电notifyItemChanged()。

例如：

    @Override
    public void afterTextChanged(Editable s) {
        data[position][3] = s.toString();
        Log.d("DATA" + position + "3", s.toString());
        notifyItemChanged(position);
    }

我还有一个建议是重用代码，这样就不必复制粘贴这么多并在很多地方修复（例如，所有的TextWatcher对象基本相同）。

Answer 3

我以前在onBindViewHolder中使用OnFocusChangeListener作为适配器

        editText.setText(mValues.get(position).getValue());
        editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                if (!hasFocus)
                    mValues.get(position).setValue(editText.getText().toString());
            }
        });

Answer 4

设置数据时，应使用getAdapterPosition（）代替position。这是因为，当recyclerview滚动时，它将被回收并且该位置将无法获得正确的值。

            data[getAdapterPosition()][1] = s.toString();

Answer 5

这是 Recycler View Recycle 的问题，只需覆盖这些功能

 @Override
  public long getItemId(int position) {
   return position;
  } 

 @Override public int getItemViewType(int position) {
 return position;
 }

Android RecyclerView -Multiple Edittext同时更改

5 个答案: