Android控件ListView获取item中EditText值

时间:2022-03-07 14:48:49

能够明白,如今没有直接方法能够获得ListView中每一行EditText的值.

解决方式: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,依据position即数组下标,在getView中动态更新EditText和动态获取EditText中的值.由于ListView中的item是复用的,假设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<Map<String, Object>> mData;// 存储的EditText值
public Map<String, String> editorValue = new HashMap<String, String>();// public ListEditorAdapter(Context context, List<Map<String, Object>> 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
}
}

用法:

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();就能够更新ListView的数据

当然,直接从mCheckItemList也能够获得用户在EditText中输入的数据.比較方便

其它:

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,依据其id

// EditText et = (EditText) layout.getChildAt(1)//或者依据位置,在这我如果TextView在前。EditText在后

     

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

}