ListView and CheckBox

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:background="#98F5FF" android:orientation="vertical"
	android:layout_width="fill_parent" android:layout_height="fill_parent">
	<ListView android:id="@+id/lv" android:layout_width="fill_parent"
		android:layout_height="300dp" />
	<EditText android:id="@+id/task_opinion" android:lines="3"
		 android:hint="请添加您的选项"
		android:layout_marginTop="5dp" android:layout_marginBottom="2dp"
		android:scrollbars="vertical" android:layout_marginLeft="5dp"
		android:layout_marginRight="5dp" android:gravity="top|left"
		android:textSize="17sp" android:layout_height="wrap_content"
		android:layout_width="fill_parent">
	</EditText>
</LinearLayout>

 list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="horizontal" android:layout_width="fill_parent"
	android:layout_height="fill_parent" android:background="#98F5FF">
	<CheckBox android:id="@+id/cb" android:layout_width="wrap_content"
		android:layout_height="wrap_content" android:focusable="false"
		android:focusableInTouchMode="false" android:clickable="false"
		android:checkMark="?android:attr/listChoiceIndicatorMultiple" />
	<TextView android:id="@+id/title" android:textColor="#000000"
		android:textSize="17sp" android:layout_marginLeft="5dp"
		android:layout_gravity="center" android:layout_weight="1"
		android:layout_width="wrap_content" android:layout_height="wrap_content" />
</LinearLayout>    

 

Main.java

public class Main extends Activity {
	ListView list;
	StringBuffer stringBuffer;
	EditText opinionEditText;
	public List<Map<String, Object>> mData;
	public String opition[] = { "选项1", "选项2", "选项3", "选项4", "选项5", "选项6",
			"选项7", "选项8", "选项9" };
	public boolean isSelect[] = new boolean[opition.length];// 初始复选情况

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		init();

		MyAdapter adapter = new MyAdapter(this, mData);
		list.setAdapter(adapter);
		list.setItemsCanFocus(false);
		list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
		list.setOnItemClickListener(new OnItemClickListener() {
			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				ViewHolder vHollder = (ViewHolder) view.getTag();
				// 在每次获取点击的item时将对于的checkbox状态改变，同时修改map的值。
				vHollder.cBox.toggle();// 反转当前视图的选中状态

				String s = "";
				if (vHollder.cBox.isChecked() == true) {
					isSelect[position] = true;

				} else {
					isSelect[position] = false;
				}
				for (int i = 0; i < isSelect.length; i++) {
					if (isSelect[i]) { // 如果该选项被选中
						s = s + opition[i] + "、";
					}
				}
				MyAdapter.isSelected.put(position, vHollder.cBox.isChecked());
				try {
					opinionEditText.setText(s.substring(0, s.length() - 1));
				} catch (Exception e) {
				}
			}
		});
	}

	private void init() {
		stringBuffer = new StringBuffer();
		list = (ListView) findViewById(R.id.lv);
		opinionEditText = (EditText) findViewById(R.id.task_opinion);
		System.out.println(isSelect.length);
		for (int i = 0; i < opition.length; i++) {
			isSelect[i] = false;
			System.out.println(i);
		}
		// 测试数据
		mData = new ArrayList<Map<String, Object>>();
		Map<String, Object> map = new HashMap<String, Object>();
		for (int i = 0; i < opition.length; i++) {
			map = new HashMap<String, Object>();
			map.put("title", opition[i]);
			mData.add(map);
		}
	}
}

 

 

MyAdapter.java

public class MyAdapter extends BaseAdapter {
	private LayoutInflater mInflater;
	private List<Map<String, Object>> mData;
	public static Map<Integer, Boolean> isSelected;

	public MyAdapter(Main context, List<Map<String, Object>> mData1) {
		mData=mData1;
		mInflater = LayoutInflater.from(context);
		
		// 这儿定义isSelected这个map是记录每个listitem的状态，初始状态全部为false。
		isSelected = new HashMap<Integer, Boolean>();
		for (int i = 0; i < mData.size(); i++) {
			isSelected.put(i, false);
		}
	}

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

	@Override
	public Object getItem(int position) {
		return null;
	}

	@Override
	public long getItemId(int position) {
		return 0;
	}

	@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.list, null);
			holder.title = (TextView) convertView.findViewById(R.id.title);
			holder.cBox = (CheckBox) convertView.findViewById(R.id.cb);
			convertView.setTag(holder);
		} else {
			holder = (ViewHolder) convertView.getTag();
		}
		holder.title.setText(mData.get(position).get("title").toString());
		holder.cBox.setChecked(isSelected.get(position));
		return convertView;
	}

	public final class ViewHolder {
		public TextView title;
		public CheckBox cBox;
	}
}

  

评论

1 楼 Will.Du 2012-01-19  

就没有个更好的方法么？我试了一下用setid来搞定，不过也有问题，监听会乱掉~~因为每次拉动list都会走getview~！！