android listview里item添加一个按钮点击事件,android中在Activity中响应ListView内部按钮的点击事件的两种方法...

最近交流群里面有人问到一个问题：如何在Activity中响应ListView内部按钮的点击事件，不要在Adapter中响应？

对于这个问题，我最初给他的解答是，在Adapter中定义一个回调接口，在Activity中实现该接口，从而实现对点击事件的响应。

下班后思考了一下，觉得有两种方式都能比较好的实现：使用接口回调和使用抽象类回调。

正好可以复习一下接口和抽象类的区别，于是写了两个Demo：

1.使用接口回调：

Adapter类

package com.ivan.adapter;

import java.util.List;

import android.content.Context;

import android.util.Log;

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;

import android.widget.TextView;

import com.ivan.listvieweventcallback.R;

public class ContentAdapter extends BaseAdapter implements OnClickListener {

private static final String TAG = "ContentAdapter";

private List mContentList;

private LayoutInflater mInflater;

private Callback mCallback;

public interface Callback {

public void click(View v);

}

public ContentAdapter(Context context, List contentList,

Callback callback) {

mContentList = contentList;

mInflater = LayoutInflater.from(context);

mCallback = callback;

}

@Override

public int getCount() {

Log.i(TAG, "getCount");

return mContentList.size();

}

@Override

public Object getItem(int position) {

Log.i(TAG, "getItem");

return mContentList.get(position);

}

@Override

public long getItemId(int position) {

Log.i(TAG, "getItemId");

return position;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

Log.i(TAG, "getView");

ViewHolder holder = null;

if (convertView == null) {

convertView = mInflater.inflate(R.layout.list_item, null);

holder = new ViewHolder();

holder.textView = (TextView) convertView

.findViewById(R.id.textView1);

holder.button = (Button) convertView.findViewById(R.id.button1);

convertView.setTag(holder);

} else {

holder = (ViewHolder) convertView.getTag();

}

holder.textView.setText(mContentList.get(position));

holder.button.setOnClickListener(this);

holder.button.setTag(position);

return convertView;

}

public class ViewHolder {

public TextView textView;

public Button button;

}

//响应按钮点击事件,调用子定义接口，并传入View

@Override

public void onClick(View v) {

mCallback.click(v);

}

}

Activity类：

package com.ivan.listvieweventdemo;

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.ListView;

import android.widget.Toast;

import com.ivan.adapter.ContentAdapter;

import com.ivan.adapter.ContentAdapter.Callback;

import com.ivan.listvieweventcallback.R;

//MainActivity需要实现自定义接口

public class MainActivity extends Activity implements OnItemClickListener,

Callback {

// 模拟listview中加载的数据

private static final String[] CONTENTS = { "北京", "上海", "广州", "深圳", "苏州",

"南京", "武汉", "长沙", "杭州" };

private List contentList;

private ListView mListView;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

init();

}

private void init() {

mListView = (ListView) findViewById(R.id.listview);

contentList = new ArrayList();

for (int i = 0; i < CONTENTS.length; i++) {

contentList.add(CONTENTS[i]);

}

//

mListView.setAdapter(new ContentAdapter(this, contentList, this));

mListView.setOnItemClickListener(this);

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

@Override

public void onItemClick(AdapterView> arg0, View v, int position, long id) {

Toast.makeText(this, "listview的item被点击了！，点击的位置是-->" + position,

Toast.LENGTH_SHORT).show();

}

@Override

public void click(View v) {

Toast.makeText(

MainActivity.this,

"listview的内部的按钮被点击了！，位置是-->" + (Integer) v.getTag() + ",内容是-->"

+ contentList.get((Integer) v.getTag()),

Toast.LENGTH_SHORT).show();

}

}

2.使用抽象类回调

Adapter类：

package com.ivan.adapter;

import java.util.List;

import android.content.Context;

import android.util.Log;

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;

import android.widget.TextView;

import com.ivan.listvieweventabstract.R;

public class ContentAdapter extends BaseAdapter {

private static final String TAG = "ContentAdapter";

private List mContentList;

private LayoutInflater mInflater;

private MyClickListener mListener;

public ContentAdapter(Context context, List contentList,

MyClickListener listener) {

mContentList = contentList;

mInflater = LayoutInflater.from(context);

mListener = listener;

}

@Override

public int getCount() {

Log.i(TAG, "getCount");

return mContentList.size();

}

@Override

public Object getItem(int position) {

Log.i(TAG, "getItem");

return mContentList.get(position);

}

@Override

public long getItemId(int position) {

Log.i(TAG, "getItemId");

return position;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

Log.i(TAG, "getView");

ViewHolder holder = null;

if (convertView == null) {

convertView = mInflater.inflate(R.layout.list_item, null);

holder = new ViewHolder();

holder.textView = (TextView) convertView

.findViewById(R.id.textView1);

holder.button = (Button) convertView.findViewById(R.id.button1);

convertView.setTag(holder);

} else {

holder = (ViewHolder) convertView.getTag();

}

holder.textView.setText(mContentList.get(position));

holder.button.setOnClickListener(mListener);

holder.button.setTag(position);

return convertView;

}

public class ViewHolder {

public TextView textView;

public Button button;

}

public static abstract class MyClickListener implements OnClickListener {

@Override

public void onClick(View v) {

myOnClick((Integer) v.getTag(), v);

}

public abstract void myOnClick(int position, View v);

}

}

Activity类：

package com.ivan.listvieweventdemo;

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.ListView;

import android.widget.Toast;

import com.ivan.adapter.ContentAdapter;

import com.ivan.adapter.ContentAdapter.MyClickListener;

import com.ivan.listvieweventabstract.R;

public class MainActivity extends Activity implements OnItemClickListener {

// 模拟listview中加载的数据

private static final String[] CONTENTS = { "北京", "上海", "广州", "深圳", "苏州",

"南京", "武汉", "长沙", "杭州" };

private List contentList;

private ListView mListView;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

init();

}

private void init() {

mListView = (ListView) findViewById(R.id.listview);

contentList = new ArrayList();

for (int i = 0; i < CONTENTS.length; i++) {

contentList.add(CONTENTS[i]);

}

//实例化ContentAdapter类，并传入实现类

mListView.setAdapter(new ContentAdapter(this, contentList, mListener));

mListView.setOnItemClickListener(this);

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

//响应item点击事件

@Override

public void onItemClick(AdapterView> arg0, View v, int position, long id) {

Toast.makeText(this, "listview的item被点击了！，点击的位置是-->" + position,

Toast.LENGTH_SHORT).show();

}

private MyClickListener mListener = new MyClickListener() {

@Override

public void myOnClick(int position, View v) {

Toast.makeText(

MainActivity.this,

"listview的内部的按钮被点击了！，位置是-->" + position + ",内容是-->"

+ contentList.get(position), Toast.LENGTH_SHORT)

.show();

}

};

}

两种方式的区别在于，抽象类在Activity中实现的时候，只能定义一个成员变量来实现，不能由Activity直接实现，因为Java不支持多继承。而接口既可以由Activity直接实现，也可以由其成员变量来实现。

原文链接：http://blog.csdn.net/u011895534/article/details/50439547

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。