Android RecyclerView -Multiple Edittext同时更改

Question

Android RecyclerView -Multiple Edittext同时更改

All*_*nis 2 android android-layout android-recyclerview

我有一张RecyclerView有很多牌可容纳4张的牌EditText.当我在一张EditText卡中的一张卡中输入值时,它会在随机卡中填充相同的值.令人惊讶的是它没有跳过EditText例如:

如果我输入值edittext1的card1它将填补相同的值到edittext1的card8,如果我改变的值card8会更改值回card1.有人可以告诉我为什么会这样.

先感谢您

这是我的代码:

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;
}

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这是我的卡片xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:weightSum="1">
<!-- A CardView that contains a TextView -->
<android.support.v7.widget.CardView
    android:id="@+id/card_view"
    android:layout_width="375dp"
    android:layout_height="wrap_content"
    android:layout_margin="4dp"
    android:backgroundTint="#eeeeee"
    card_view:cardCornerRadius="4dp">

    <TextView
        android:id="@+id/serNo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:text="number"
        android:layout_margin="20dp"
        android:textColor="@color/cardview_dark_background" />

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center">

        <EditText
            android:id="@+id/ip1_text"
            android:layout_width="100dp"
            android:layout_height="30dp"
            android:layout_alignParentLeft="true"
            android:layout_marginTop="20dp"
            android:background="@color/cardview_light_background"
            android:inputType="number"
            android:maxLength="2" />

        <EditText
            android:id="@+id/ip3_text"
            android:layout_width="80dp"
            android:layout_height="30dp"
            android:layout_below="@+id/ip1_text"
            android:layout_marginBottom="10dp"
            android:layout_marginLeft="10dp"
            android:layout_marginTop="10dp"
            android:background="@color/cardview_light_background"
            android:inputType="number"
            android:maxLength="1" />

        <EditText
            android:id="@+id/ip2_text"
            android:layout_width="100dp"
            android:layout_height="30dp"
            android:layout_marginLeft="20dp"
            android:layout_marginTop="20dp"
            android:layout_toRightOf="@+id/ip1_text"
            android:background="@color/cardview_light_background"
            android:inputType="number"
            android:maxLength="2" />

        <EditText
            android:id="@+id/ip4_text"
            android:layout_width="80dp"
            android:layout_height="30dp"
            android:layout_below="@+id/ip2_text"
            android:layout_marginBottom="10dp"
            android:layout_marginLeft="40dp"
            android:layout_marginTop="10dp"
            android:layout_toRightOf="@+id/ip3_text"
            android:background="@color/cardview_light_background"
            android:inputType="number"
            android:maxLength="1" />
    </RelativeLayout>
</android.support.v7.widget.CardView>
</LinearLayout>

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Answer 1

Nik*_*dze 8

发生这种情况是因为a RecyclerView中的视图正在被回收.在内部,onBindViewHolder您需要将特定文本设置为特定位置的EditTexts.

初始化你的视图ViewHolder并在那里添加TextWatchers,因为整个哲学RecyclerView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());
            }
        });
    }
}

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将相应的文本设置为以下内容中的EditTexts onBindViewHolder:

@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]);
}

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