android为ListView每个Item上面的按钮添加事件_安卓软件开发教程-查字典教程网

摘要：本文介绍了ListView给每个Item上面的按钮添加事件，具体如下：1.先看下效果图：在这里仅供测试，我把数据都写死了，根据需要可以自己进...

本文介绍了ListView给每个Item上面的按钮添加事件，具体如下：

1.先看下效果图：

android为ListView每个Item上面的按钮添加事件1

在这里仅供测试，我把数据都写死了，根据需要可以自己进行修改，此外实现ListView上面每个Item上的Button的事件有两种方法：

1.使用final变量扩展局部变量的生命周期范围主要代码（本文最后附全部代码）：

//注意原本getView方法中的int position变量是非final的，现在改为final @Override public View getView(final int position, View convertView, ViewGroup parent) { ViewHolder holder = null; if (convertView == null) { holder=new ViewHolder(); //可以理解为从vlist获取view 之后把view返回给ListView convertView = mInflater.inflate(R.layout.vlist, null); holder.title = (TextView)convertView.findViewById(R.id.title); holder.info = (TextView)convertView.findViewById(R.id.info); holder.viewBtn = (Button)convertView.findViewById(R.id.view_btn); convertView.setTag(holder); }else { holder = (ViewHolder)convertView.getTag(); } holder.title.setText((String)mData.get(position).get("title")); holder.info.setText((String)mData.get(position).get("info")); holder.viewBtn.setTag(position); //给Button添加单击事件添加Button之后ListView将失去焦点需要的直接把Button的焦点去掉 holder.viewBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { showInfo(position); } }); //holder.viewBtn.setOnClickListener(MyListener(position)); return convertView; } } //提取出来方便点 public final class ViewHolder { public TextView title; public TextView info; public Button viewBtn; } public void showInfo(int position){ ImageView img=new ImageView(ListViewActivity.this); img.setImageResource(R.drawable.b); new AlertDialog.Builder(this).setView(img) .setTitle("详情"+position) .setMessage("菜名："+title[position]+" 价格:"+info[position]) .setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }) .show(); }

2.使用类记录每个Button的位置，使每个BUTTON都有自己的Listener主要代码：

//****************************************第二种方法，高手一般都用此种方法,具体原因，我还不清楚,有待研究 public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; MyListener myListener=null; if (convertView == null) { holder=new ViewHolder(); //可以理解为从vlist获取view 之后把view返回给ListView myListener=new MyListener(position); convertView = mInflater.inflate(R.layout.vlist, null); holder.title = (TextView)convertView.findViewById(R.id.title); holder.info = (TextView)convertView.findViewById(R.id.info); holder.viewBtn = (Button)convertView.findViewById(R.id.view_btn); convertView.setTag(holder); }else { holder = (ViewHolder)convertView.getTag(); } holder.title.setText((String)mData.get(position).get("title")); holder.info.setText((String)mData.get(position).get("info")); holder.viewBtn.setTag(position); //给Button添加单击事件添加Button之后ListView将失去焦点需要的直接把Button的焦点去掉 holder.viewBtn.setOnClickListener( myListener); //holder.viewBtn.setOnClickListener(MyListener(position)); return convertView; } } private class MyListener implements OnClickListener{ int mPosition; public MyListener(int inPosition){ mPosition= inPosition; } @Override public void onClick(View v) { // TODO Auto-generated method stub Toast.makeText(ListViewActivity.this, title[mPosition], Toast.LENGTH_SHORT).show(); } } //提取出来方便点 public final class ViewHolder { public TextView title; public TextView info; public Button viewBtn; }

3.全部代码

1.ListViewActivity.Java全部代码：

package ms.ListView; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.BaseAdapter; import android.widget.Button; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; public class ListViewActivity extends Activity { /** Called when the activity is first created. */ private List<Map<String, Object>> mData; private int flag; public static String title[]=new String[]{"菜名0","菜名1","菜名2","菜名3","菜名4","菜名5","菜名6","菜名7","菜名8","菜名9"}; public static String info[]=new String[]{ "￥：28","￥：28","￥：28","￥：28","￥：28","￥：28","￥：28","￥：28","￥：28","￥：28",}; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mData = getData(); ListView listView = (ListView) findViewById(R.id.listView); MyAdapter adapter = new MyAdapter(this); listView.setAdapter(adapter); } //获取动态数组数据可以由其他地方传来(json等) private List<Map<String, Object>> getData() { List<Map<String, Object>> list = new ArrayList<Map<String, Object>>(); for(int i=0;i<title.length;i++){ Map<String, Object> map = new HashMap<String, Object>(); map.put("title", title[i]); map.put("info", info[i]); list.add(map); } return list; } public class MyAdapter extends BaseAdapter { private LayoutInflater mInflater; public MyAdapter(Context context) { this.mInflater = LayoutInflater.from(context); } @Override public int getCount() { // TODO Auto-generated method stub return mData.size(); } @Override public Object getItem(int position) { // TODO Auto-generated method stub return null; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return 0; } //****************************************final方法 //注意原本getView方法中的int position变量是非final的，现在改为final @Override public View getView(final int position, View convertView, ViewGroup parent) { ViewHolder holder = null; if (convertView == null) { holder=new ViewHolder(); //可以理解为从vlist获取view 之后把view返回给ListView convertView = mInflater.inflate(R.layout.vlist, null); holder.title = (TextView)convertView.findViewById(R.id.title); holder.info = (TextView)convertView.findViewById(R.id.info); holder.viewBtn = (Button)convertView.findViewById(R.id.view_btn); convertView.setTag(holder); }else { holder = (ViewHolder)convertView.getTag(); } holder.title.setText((String)mData.get(position).get("title")); holder.info.setText((String)mData.get(position).get("info")); holder.viewBtn.setTag(position); //给Button添加单击事件添加Button之后ListView将失去焦点需要的直接把Button的焦点去掉 holder.viewBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { showInfo(position); } }); //holder.viewBtn.setOnClickListener(MyListener(position)); return convertView; } } //****************************************第二种方法，高手一般都用此种方法,具体原因，我还不清楚,有待研究 // public View getView(int position, View convertView, ViewGroup parent) { // ViewHolder holder = null; // MyListener myListener=null; // if (convertView == null) { // // holder=new ViewHolder(); // // //可以理解为从vlist获取view 之后把view返回给ListView // myListener=new MyListener(position); // // convertView = mInflater.inflate(R.layout.vlist, null); // holder.title = (TextView)convertView.findViewById(R.id.title); // holder.info = (TextView)convertView.findViewById(R.id.info); // holder.viewBtn = (Button)convertView.findViewById(R.id.view_btn); // convertView.setTag(holder); // }else { // holder = (ViewHolder)convertView.getTag(); // } // // holder.title.setText((String)mData.get(position).get("title")); // holder.info.setText((String)mData.get(position).get("info")); // holder.viewBtn.setTag(position); // //给Button添加单击事件添加Button之后ListView将失去焦点需要的直接把Button的焦点去掉 // holder.viewBtn.setOnClickListener( myListener); // // //holder.viewBtn.setOnClickListener(MyListener(position)); // // return convertView; // } // } // // private class MyListener implements OnClickListener{ // int mPosition; // public MyListener(int inPosition){ // mPosition= inPosition; // } // @Override // public void onClick(View v) { // // TODO Auto-generated method stub // Toast.makeText(ListViewActivity.this, title[mPosition], Toast.LENGTH_SHORT).show(); // } // // } // // //提取出来方便点 public final class ViewHolder { public TextView title; public TextView info; public Button viewBtn; } public void showInfo(int position){ ImageView img=new ImageView(ListViewActivity.this); img.setImageResource(R.drawable.b); new AlertDialog.Builder(this).setView(img) .setTitle("详情"+position) .setMessage("菜名："+title[position]+" 价格:"+info[position]) .setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }) .show(); } }

2.main.xml

<"1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <ListView android:id="@+id/listView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:divider="@drawable/list_line" android:dividerHeight="1dip" /> </LinearLayout>

3.vlist.xml

4.btn_detail_selecter.xml

<"1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@drawable/btn_detail_normal" android:state_enabled="true" android:state_focused="false" android:state_pressed="false"/> <item android:drawable="@drawable/btn_detail_pressed" android:state_enabled="true" android:state_pressed="true"/> <item android:drawable="@drawable/btn_detail_pressed" android:state_enabled="true" android:state_focused="true"/> </selector>

5.item.xml

<"1.0" encoding="UTF-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@drawable/item_higlight" android:state_focused="true" android:state_pressed="false"/> <item android:drawable="@drawable/item_higlight" android:state_focused="false" android:state_pressed="true"/> <item android:drawable="@drawable/item_higlight" android:state_selected="true"/> <item android:drawable="@drawable/item_higlight" android:state_focused="true"/> <item android:drawable="@drawable/item_higlight"/> </selector>

6.colors.xml

<"1.0" encoding="UTF-8"?> <resources> <color name="region">#8000ff00</color> <color name="listTitle">#ff23323b</color> <color name="text">#ff848f9b</color> <color name="write">#ffffffff</color> </resources>

7.values.xml

<"1.0" encoding="utf-8"?> <resources> <string name="hello">Hello World, ListViewActivity!</string> <string name="app_name">ListView</string> </resources>

8.drawables.xml

<"1.0" encoding="UTF-8"?> <resources> <item type="drawable" name="bg">#80000000</item> <item type="drawable" name="transparent">#00000000</item> <item type="drawable" name="lightblue">#ffcfe1ed</item> <item type="drawable" name="readmenu_btn_bg_f">#30ffffff</item> <item type="drawable" name="readmenu_btn_bg_p">#50ffffff</item> <item type="drawable" name="blackMask">#30000000</item> </resources>

原文链接：http://blog.csdn.net/qq435757399/article/details/8256453

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