Android小记：ListView中的按钮点击响应事件

转载自：http://www.cnblogs.com/ivan-xu/p/4124967.html
http://www.2cto.com/kf/201403/286545.html

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。

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

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<String> mContentList;    private LayoutInflater mInflater;    private MyCallback mCallback;    public ContentAdapter(Context context, List<String> contentList,            MyCallback 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);    }}

自定义接口:

/** * 自定义接口，用于回调按钮点击事件到Activity */public interface MyCallback {    public void click(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.Callback;import com.ivan.listvieweventcallback.R;//MainActivity需要实现自定义接口public class MainActivity extends Activity implements OnItemClickListener,        MyCallback {    // 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<String> 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<String>();        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;    }    /**     * 响应ListView中item的点击事件     */    @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();    }    /**     * 接口方法，响应ListView按钮点击事件     */    @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<String> mContentList;     private LayoutInflater mInflater;     private MyClickListener mListener;     public ContentAdapter(Context context, List<String> 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;     }     /**      * 用于回调的抽象类      */     public static abstract class MyClickListener implements OnClickListener {         /**          * 基类的onClick方法          */         @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<String> 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<String>();         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();     }     /**      * 实现类，响应按钮点击事件      */     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();         }     }; }

布局文件:

<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"     android:paddingBottom="@dimen/activity_vertical_margin"     android:paddingLeft="@dimen/activity_horizontal_margin"     android:paddingRight="@dimen/activity_horizontal_margin"     android:paddingTop="@dimen/activity_vertical_margin"     tools:context=".MainActivity" >     <ListView         android:id="@+id/listview"         android:layout_width="match_parent"         android:layout_height="match_parent" >     </ListView> </RelativeLayout><?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="wrap_content"    android:descendantFocusability="blocksDescendants"    android:orientation="vertical" >    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="content"        android:textColor="#ff0000"        android:textSize="20sp" />    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:focusable="false"        android:text="Button"        android:textColor="#ff0000"        android:textSize="20sp" /></LinearLayout>

Android listview适配器里区分不同按钮的点击事件

1.适配器 ListItemClickAdapter

public class ListItemClickAdapter extends BaseAdapter {    private Context contxet;    private ArrayList<string> list;    private ListItemClickHelp callback;    private LayoutInflater mInflater;    public ListItemClickAdapter(Context contxet, ArrayList<string> list,            ListItemClickHelp callback) {        this.contxet = contxet;        this.list = list;        this.callback = callback;    }    @Override    public int getCount() {        return list.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, final ViewGroup parent) {        mInflater = (LayoutInflater) contxet                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);        ViewHolder holder;        if (convertView == null) {            convertView = mInflater.inflate(R.layout.block_list_item, null);            holder = new ViewHolder();            holder.mAd_tv_show = (TextView) convertView                    .findViewById(R.id.ad_tv_show);            holder.mAd_btn_one = (Button) convertView                    .findViewById(R.id.ad_btn_one);            holder.mAd_btn_two = (Button) convertView                    .findViewById(R.id.ad_btn_two);            convertView.setTag(holder);        } else {            holder = (ViewHolder) convertView.getTag();        }        holder.mAd_tv_show.setText(list.get(position));        final View view = convertView;        final int p = position;        final int one = holder.mAd_btn_one.getId();        holder.mAd_btn_one.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                callback.onClick(view, parent, p, one);            }        });        final int two = holder.mAd_btn_two.getId();        holder.mAd_btn_two.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                callback.onClick(view, parent, p, two);            }        });        return convertView;    }    public static class ViewHolder {        TextView mAd_tv_show;        Button mAd_btn_one;        Button mAd_btn_two;    }

2.接口 ListItemClickHelp

/** * listview点击事件接口 */publicinterfaceListItemClickHelp {    voidonClick(View item, View widget, intposition,intwhich);}

3.界面 MainActivity

publicclassMainActivityextendsActivityimplementsListItemClickHelp {    privateTextView mtv_show;    privateListView mlv_show;    privateArrayList<string> mdata = newArrayList<string>();    privateListItemClickAdapter madapter;    @Override    protectedvoidonCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initLayout();    }    privatevoidinitLayout() {        mdata.add("One");        mdata.add("Two");        mdata.add("Three");        mdata.add("Four");        mdata.add("Five");        mdata.add("菠萝");        mdata.add("苹果");        mdata.add("葡萄");        mdata.add("哈密瓜");        mdata.add("香蕉");        mtv_show = (TextView) this.findViewById(R.id.tv_show);        mlv_show = (ListView) this.findViewById(R.id.lv_show);        madapter = newListItemClickAdapter(this, mdata, this);        mlv_show.setAdapter(madapter);        mlv_show.setOnItemClickListener(newOnItemClickListener() {            @Override            publicvoidonItemClick(AdapterView<!--?--> adapter, View view,                    intposition,longarg3) {                mtv_show.setText(mdata.get(position));            }        });    }    @Override    publicvoidonClick(View item, View widget, intposition,intwhich) {        switch(which) {        caseR.id.ad_btn_one:            mtv_show.setText(mdata.get(position) + "Btn one");            break;        caseR.id.ad_btn_two:            mtv_show.setText(mdata.get(position) + "Btn two");            break;        default:            break;        }    }}