安卓Android控件ListView获取item中EditText值-白红宇

安卓Android控件ListView获取item中EditText值

阅读量：6077 次

发布时间：2019-06-20

本文共 4214 字，大约阅读时间需要 14 分钟。

可以明确,现在没有直接方法可以获得ListView中每一行EditText的值.

解决方案:重写BaseAdapter,然后自行获取ListView中每行输入的EditText值.

大概算法:重写BaseAdapter.getView函数,用一个数组存储EditText中的值,根据position即数组下标,在getView中动态更新EditText和动态获取EditText中的值.因为ListView中的item是复用的,如果不动态清空或动态获取EditText中值,就会出现数据紊乱,或者没数据.那么在生成EditText的时候要监控其值的变化.存储下来.

代码:

package com.exmyth.android;public class ListEditorAdapter extends BaseAdapter {    private LayoutInflater mInflater;    private List
       
        > mData;// 存储的EditText值    public Map
        
          editorValue = new HashMap
         
          ();//    public ListEditorAdapter(Context context, List
          
           
            > data) { mData = data; mInflater = LayoutInflater.from(context); init(); } // 初始化 private void init() { editorValue.clear(); } @Override public int getCount() { return mData.size(); } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { return 0; } private Integer index = -1; @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; // convertView为null的时候初始化convertView。 if (convertView == null) { holder = new ViewHolder(); convertView = mInflater.inflate(R.layout.listview_item, null); holder.name = (TextView) convertView .findViewById(R.id.list_item_name); holder.title = (TextView) convertView .findViewById(R.id.list_item_title); holder.value = (EditText) convertView .findViewById(R.id.list_item_inputvalue); holder.value.setTag(position); holder.userkey = (TextView) convertView.findViewById(R.id.user_key); holder.value.setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_UP) { index = (Integer) v.getTag(); } return false; } }); class MyTextWatcher implements TextWatcher { public MyTextWatcher(ViewHolder holder) { mHolder = holder; } private ViewHolder mHolder; @Override public void onTextChanged(CharSequence s, int start, int before, int count) { } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void afterTextChanged(Editable s) { if (s != null && !"".equals(s.toString())) { int position = (Integer) mHolder.value.getTag(); mData.get(position).put("list_item_inputvalue", s.toString());// 当EditText数据发生改变的时候存到data变量中 } } } holder.value.addTextChangedListener(new MyTextWatcher(holder)); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); holder.value.setTag(position); } Object value = mData.get(position).get("list_item_name"); if (value != null) { holder.name.setText((String) value); } value = mData.get(position).get("list_item_title"); if (value != null) { holder.title.setText(value.toString()); } value = mData.get(position).get("user_key"); if (value != null) { holder.userkey.setText(value.toString()); } else { holder.userkey.setText("-1"); } value = mData.get(position).get("list_item_inputvalue"); if (value != null && !"".equals(value)) { holder.value.setText(value.toString()); } else { String key = mData.get(position).get("user_key").toString(); String inputValue = editorValue.get(key); holder.value.setText(inputValue); } holder.value.clearFocus(); if (index != -1 && index == position) { holder.value.requestFocus(); } return convertView; } public final class ViewHolder { public TextView name; public TextView title; public EditText value;// ListView中的输入 public TextView userkey;// 用来定义的标志性主键,可不用关心 }}

使用方法:

private List<Map<String, Object>> mCheckItemList = new ArrayList<Map<String, Object>>();

mAdapter = new ListEditorAdapter(this, mCheckItemList);

m_lvListView.setAdapter(mAdapter);

直接改变mCheckItemList中的数据,然后调用mAdapter.notifyDataSetChanged();就可以更新ListView的数据

当然,直接从mCheckItemList也可以获得用户在EditText中输入的数据.比较方便

其他:

ListView list= (ListView)findViewById(R.id.list);//获得listview

for (int i = 0; i < list.getChildCount(); i++) {

LinearLayout layout = (LinearLayout)list.getChildAt(i);// 获得子item的layout

EditText et = (EditText) layout.findViewById(R.id.et);// 从layout中获得控件,根据其id

// EditText et = (EditText) layout.getChildAt(1)//或者根据位置,在这我假设TextView在前，EditText在后

System.out.println("the text of "+i+"'s EditText：----------->"+et.getText());

}

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