listView EditText编辑后自动保存

解决方案一:

适配器的的getview方法里给edittext添加修改监听,修改完就设置到数据里,EditText默认显示根据pos获取数据.

 

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其他解决方案

最近一个朋友的项目的需求是expandableListView的item中编辑信息，并且在页面的右上角是保存按钮。

这个需求也是rlgl ,在页面绘制计算，滑动 展开child item 的时候EditText焦点均有变化。实在是头疼的很。

编辑完成无单独保存按钮，必须使用TextWatcher。但是TextWatcher的返回的内容与当前的position对应不上。

记录下作为笔记

import android.content.Context;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.EditText;

import com.constrainlayout.R;

import java.util.HashMap;

/**
* Created by zonglv on 2018/1/24.
*/

public class TestListViewAdapter extends BaseAdapter {


private final Context mContext;
private final HashMap<Integer, String> mData;
private int mTouchItemPosition = -1;
private OnChangedTextListener onChangedTextListener;

public TestListViewAdapter(Context context, HashMap<Integer, String> data) {
this.mContext = context;
this.mData = data;
}

@Override
public int getCount() {
return mData.size();
}

@Override
public Object getItem(int position) {
return mData.get(position);
}

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

public HashMap<Integer, String> getmData() {
return mData;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView == null) {
viewHolder = new ViewHolder();
convertView = LayoutInflater.from(mContext).inflate(R.layout.item_list, null);
viewHolder.editText = (EditText) convertView.findViewById(R.id.item_edit);
viewHolder.mTextWatcher = new MyTextChangeWatch();
//设置数据监听
viewHolder.editText.addTextChangedListener(viewHolder.mTextWatcher);
viewHolder.upDataPosition(position);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
viewHolder.upDataPosition(position);
}
viewHolder.editText.setText(mData.get(position));
viewHolder.editText.setTag(position);
viewHolder.editText.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
//使用getTag 记录position
mTouchItemPosition = (int) v.getTag();
return false;
}
});
/**
* 解决焦点问题
* 当editView获取焦点时,listview会重新绘制,致使editView的焦点光标失去
*/
if (mTouchItemPosition == position) {
viewHolder.editText.requestFocus();
viewHolder.editText.setSelection(viewHolder.editText.getText().length());
} else {
viewHolder.editText.clearFocus();
}
return convertView;
}

class ViewHolder {
EditText editText;
MyTextChangeWatch mTextWatcher;

//记录position,防止数据复用时,错乱
public void upDataPosition(int position) {
mTextWatcher.upDataPosition(position);
}
}

class MyTextChangeWatch implements TextWatcher {
private int position;

public void upDataPosition(int position) {
this.position = position;
}

@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) {
mData.put(position, s.toString());
if (onChangedTextListener != null) {
//使用回调将数据传递出去,进行数据检测
onChangedTextListener.onChangedTextListener(position, s.toString());
}
}
}

public void setOnChangedTextListener(OnChangedTextListener onChangedTextListener) {
this.onChangedTextListener = onChangedTextListener;
}

public interface OnChangedTextListener {
void onChangedTextListener(int position, String str);
}

}

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