ListView中实现互斥按钮（每个Item中有两个button，永远只有一个item中的一个按钮被选中）

本文链接：https://blog.youkuaiyun.com/u012101818/article/details/40210503

这个博客介绍了如何在Android的ListView中实现互斥的按钮功能。每个列表项包含两个按钮，每次只有一个按钮处于选中状态。通过使用HashMap存储每个按钮的状态，并在点击事件中更新状态并通知Adapter刷新视图，确保只有一个item的按钮处于“on”状态。

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import java.util.HashMap;
import java.util.Map;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;

public class MainAdapter extends BaseAdapter {
	private LayoutInflater inflater;
	//存放两个按钮被选中状态
	private Map<Integer, Boolean> map1;
	private Map<Integer, Boolean> map2;
	private int at = -1;

	public MainAdapter(Context context) {
		inflater = LayoutInflater.from(context);
		map1 = new HashMap<Integer, Boolean>();
		map2 = new HashMap<Integer, Boolean>();
		for (int i = 0; i < 10; i++) {//默认都未被选中
			map1.put(i, false);
			map2.put(i, false);
		}
	}

	@Override
	public int getCount() {
		// TODO Auto-generated method stub
		return 10;
	}

	@Override
	public Object getItem(int arg0) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public long getItemId(int position) {
		// TODO Auto-generated method stub
		return position;
	}

	@Override
	public View getView(final int position, View convertView, ViewGroup parent) {
		// TODO Auto-generated method stub
		ViewHolder holder;
		if (convertView == null) {
			convertView = inflater.inflate(R.layout.item, null);
			holder = new ViewHolder();
			holder.btn1 = (Button) convertView.findViewById(R.id.button1);
			holder.btn2 = (Button) convertView.findViewById(R.id.button2);
			convertView.setTag(holder);
		} else {
			holder = (ViewHolder) convertView.getTag();
		}

		holder.btn1.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				//点击button1,将button1状态变为true,其他都为0
				map1.put(position, true);
				map2.put(position, false);
				if (at != -1 && at != position) {
					map1.put(at, false);
					map2.put(at, false);
				}
				at = position;
				MainAdapter.this.notifyDataSetChanged();
			}
		});
		holder.btn2.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				//点击button2,将button2状态变为true,其他都为0
				map1.put(position, false);
				map2.put(position, true);
				if (at != -1 && at != position) {
					map1.put(at, false);
					map2.put(at, false);
				}
				at = position;
				MainAdapter.this.notifyDataSetChanged();
			}
		});
		if (map1.get(position))
			holder.btn1.setText("on");
		else
			holder.btn1.setText("off");

		if (map2.get(position))
			holder.btn2.setText("on");
		else
			holder.btn2.setText("off");
		return convertView;
	}

	class ViewHolder {
		private Button btn1;
		private Button btn2;
	}
}