android listview的item布局中含有button,不会响应listview的onitemclick监听 以及 onitemlongclick监听问题解决

效果图:

activity的布局xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.testlistviewandbutton.MainActivity" >

    <ListView
        android:id="@+id/lv_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </ListView>

</RelativeLayout>

listview item布局:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:descendantFocusability="blocksDescendants"
    android:gravity="center_horizontal"
    android:orientation="horizontal"
    android:weightSum="2" >

    <!-- android:descendantFocusability="blocksDescendants" 根布局的这个属性是重点 -->

    <Button
        android:id="@+id/btn_item"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Button" />

</LinearLayout>

listview 的adapter代码:

package com.example.testlistviewandbutton;

import java.util.List;

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

public class MyAdapter extends BaseAdapter {

	private Context context;
	private List<String> str_list;

	public MyAdapter(Context context, List<String> str_list) {
		this.context = context;
		this.str_list = str_list;
	}

	@Override
	public int getCount() {
		return str_list == null ? 0 : str_list.size();
	}

	@Override
	public String getItem(int position) {
		return str_list.get(position);
	}

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

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		if (convertView == null) {
			viewHoler = new ViewHoler();
			convertView = View.inflate(context, R.layout.listview_item, null);
			viewHoler.btn_item = (Button) convertView
					.findViewById(R.id.btn_item);
			convertView.setTag(viewHoler);
		} else {
			viewHoler = (ViewHoler) convertView.getTag();
		}
		viewHoler.btn_item.setText(getItem(position));
		viewHoler.btn_item.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				Toast.makeText(context, "点击了Button按钮", Toast.LENGTH_SHORT)
						.show();
			}
		});

		return convertView;
	}

	private ViewHoler viewHoler;

	public static class ViewHoler {
		Button btn_item;
	}

}

package com.example.testlistviewandbutton;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;

public class MainActivity extends Activity {

	private ListView lv_main;
	private List<String> str_list;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		initView();
	}
	private void initView() {
		// TODO Auto-generated method stub
		lv_main = (ListView) findViewById(R.id.lv_main);
		str_list = new ArrayList<String>();
		for(int i=0;i<20;i++) {
			str_list.add("这是第"+i+"个按钮..");
		}
		MyAdapter adapter = new MyAdapter(MainActivity.this, str_list);
		lv_main.setAdapter(adapter);
		//listview的短按监听
		lv_main.setOnItemClickListener(new OnItemClickListener() {
			@Override
			public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
					long arg3) {
				Toast.makeText(MainActivity.this, "点击了listview的onitem监听", Toast.LENGTH_SHORT)
				.show();
			}
		});
		//listview的长按监听
		lv_main.setOnItemLongClickListener(new OnItemLongClickListener() {

			@Override
			public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
					int arg2, long arg3) {
				Toast.makeText(MainActivity.this, "点击了listview的onitem长按监听", Toast.LENGTH_SHORT)
				.show();
				return true;//这里默认返回false,但是会长按之后接着响应短按了,返回true问题解决
			}
		});

	}

}

这里有三种解决方案

1.将ListView中的Item布局中的子控件focusable属性设置为false

2.在getView方法中设置button.setFocusable(false)

3.设置item的根布局的属性android:descendantFocusability="blocksDescendant"

我们可以发现，其实这三种方法都是为了让Button等控件不能获取焦点，从而使得item可以响应点击事件。

第三种方法使用起来相对方便，因为它是将item布局中的其他所有控件都设置为不能获取焦点。

android:descendantFocusability属性共有三个取值，分别为

beforeDescendants：viewgroup会优先其子类控件而获取到焦点

afterDescendants：viewgroup 只有当其子类控件不需要获取焦点时才获取焦点

blocksDescendants：viewgroup 会覆盖子类控件而直接获得焦点

嘿嘿.代码比较简单,而且也有注释,就不再多做解释了哈

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