学步园

最终效果图如下：

apiDemo中有一个listView实现多选的例子 

比较简单

package com.example.android.apis.view;

import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

/**
 * This example shows how to use choice mode on a list. This list is 
 * in CHOICE_MODE_MULTIPLE mode, which means the items behave like
 * checkboxes.
 */
public class List11 extends ListActivity {
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setListAdapter(new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_multiple_choice, GENRES));
        
        final ListView listView = getListView();

        listView.setItemsCanFocus(false);
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
    }


    private static final String[] GENRES = new String[] {
        "Action", "Adventure", "Animation", "Children", "Comedy", "Documentary", "Drama",
        "Foreign", "History", "Independent", "Romance", "Sci-Fi", "Television", "Thriller"
    };
}

利用了framework中的布局 simple_list_item_multiple_choice.xml ，该布局内容就是一个CheckedTextView

<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/text1"
    android:layout_width="match_parent"
    android:layout_height="?android:attr/listPreferredItemHeight"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:gravity="center_vertical"
    android:checkMark="?android:attr/listChoiceIndicatorMultiple"
    android:paddingLeft="6dip"
    android:paddingRight="6dip"
/>

在实际的应用中我们肯定会遇到复杂布局的情况，一旦使用复杂布局，发现listview原生的多选模式失效了！失效原因通过查看ListView的源码可以发现，问题出在setupChild函数中

private void setupChild(View child, int position, int y, boolean flowDown,int childrenLeft, boolean selected, boolean recycled) {
		..................
		if (mChoiceMode != CHOICE_MODE_NONE && mCheckStates != null) {
			if (child instanceof Checkable) {
				((Checkable) child).setChecked(mCheckStates.get(position));
			}
		}
	}

其中的child对象就是自定义adapter的getView()函数的返回结果，由于我们没有实现Checkable接口所以无法操作。变通办法，ListView有一个察看item是否被选中的函数，结合该函数，修改自定义adapter的getView函数：

public View getView(int position, View convertView, ViewGroup parent) {
		boolean check = ((ListView)parent).isItemChecked(position);
		viewHolder.myCheckedTextView.setChecked(check);
	｝

（o(︶︿︶)o 唉csdn编辑器真心难用啊 怎么改都不能把结尾的那些杂乱代码删掉）