Android RecyclerView-同时更改多个Edittext [英] Android RecyclerView -Multiple Edittext change simultaneously
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问题描述
我有一个RecyclerView，其中有许多卡可以容纳4个EditText.当我在一张卡的一个EditText中输入值时，它将在随机卡中填充相同的值.令人惊讶的是，它不会跳例如EditText:
I have a RecyclerView that has many cards that hold 4 EditText. When I input values in one EditText of one card, it fills the same value in random cards. Surprisingly it does not jump EditTexts for example:
如果我在card1的edittext1中输入值，它将在card8的edittext1中填充相同的值，如果我在card8中更改了值，它将在card1中更改该值.有人可以告诉我为什么会这样吗.
If I input values in edittext1 of card1 it would fill the same value into edittext1 in card8 and if I change the value in card8 it will change the value back in card1. Could someone please tell me why this is happening.
先谢谢您
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;
}
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>
推荐答案
发生这种情况是因为RecyclerView中的视图被回收了.在onBindViewHolder内部，您需要将特定文本设置为特定位置的EditText.
That happens because the views inside a RecyclerView are being recycled. Inside the onBindViewHolder you need to set the specific texts to the EditTexts at the specific position.
-
在
ViewHolder中初始化视图并在其中添加TextWatchers，因为RecyclerView的全部理念是重用视图:
Initialize your Views inside the
ViewHolderand add the TextWatchers there as the whole philosophy of theRecyclerViewis to reuse the views :
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());
}
});
}
}
将适当的文本设置为onBindViewHolder中的EditText:
Set the appropriate text to the EditTexts in the 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]);
}
这篇关于Android RecyclerView-同时更改多个Edittext的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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