Android控件ListView获取item中EditText值

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());
}