安卓Android控件ListView获取item中EditText值

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:

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
 }
}

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