Android控件ListView获取item中EditText值

问题：获取在ListView的item中EditText输入值
解决办法：在adapter中使用TextWatcher来保存EditText中输入的值
代码：
public class SimpleAdapter extends BaseAdapter {
private Context context;
private List dataList;
private LayoutInflater inflater;

public SimpleAdapter(Context context, List<UserBean> dataList) {
    super();
    this.context = context;
    this.dataList = dataList;
    inflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}

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

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

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

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    if (convertView == null) {
        convertView = inflater.inflate(R.layout.item, null);
        holder = new ViewHolder(convertView, position);
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }
    UserBean bean = dataList.get(position);
    holder.name.setText(bean.getName());
    holder.age.setText(bean.getAge());
    return convertView;
}

private class ViewHolder {
    private TextView name;
    private EditText age;

    public ViewHolder(View view,int position) {
        name = (TextView) view.findViewById(R.id.name);
        age = (EditText) view.findViewById(R.id.age);
        age.setTag(position);
        age.addTextChangedListener(new TextSwitcher(this));
    }

}

class TextSwitcher implements TextWatcher {
    private ViewHolder mHolder;

    public TextSwitcher(ViewHolder mHolder) {
        this.mHolder = mHolder;
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        int position = (int) mHolder.age.getTag();
        ((MainActivity)context).saveEditData(position, s.toString());
    }

    @Override
    public void afterTextChanged(Editable s) {
    }
}

}
public class MainActivity extends Activity {
private ListView listView;
private List dataList;
private SimpleAdapter adapter;
private Button btn;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    dataList = new ArrayList<UserBean>();
    btn = (Button) findViewById(R.id.btn);
    listView = (ListView) findViewById(R.id.listView);
    adapter = new SimpleAdapter(this, dataList);
    listView.setAdapter(adapter);
    initdData();
    btn.setOnClickListener(mOnClickListener);
}

private OnClickListener mOnClickListener = new OnClickListener() {

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.btn:
            String str = new Gson().toJson(dataList);
            Log.d("TEST", "str:"+str);
            break;
        default:
            break;
        }
    }
};

public void saveEditData(int position, String str) {
    dataList.get(position).setAge(str);
}

private void initdData() {
    UserBean bean = new UserBean();
    bean.setId("1001");
    bean.setName("张三");
    dataList.add(bean);
    bean = new UserBean();
    bean.setId("1002");
    bean.setName("李四");
    dataList.add(bean);
    adapter.notifyDataSetChanged();
}

}