一.代码实现

1. “Activity_11\src\yan\activity_11\MainActivity.java”

package yan.activity_11; import android.os.Bundle; import android.app.Activity; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; public class MainActivity extends Activity { ListView listView; String [] titles={"标题1","标题2","标题3","标题4"}; String [] texts={"文本内容A","文本内容B","文本内容C","文本内容D"}; int [] resIds={R.drawable.icon,R.drawable.icon,R.drawable.icon,R.drawable.icon}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); this.setTitle("BaseAdapter for ListView"); listView=(ListView)this.findViewById(R.id.MyListView); listView.setAdapter(new ListViewAdapter(titles,texts,resIds)); } public class ListViewAdapter extends BaseAdapter{ View [] itemViews; public ListViewAdapter(String [] itemTitles, String [] itemTexts, int [] itemImageRes){ itemViews = new View[itemTitles.length]; for (int i=0; i<itemViews.length; ++i){ itemViews[i] = makeItemView(itemTitles[i], itemTexts[i], itemImageRes[i]); } } public int getCount() { return itemViews.length; } public View getItem(int position) { return itemViews[position]; } public long getItemId(int position) { return position; } private View makeItemView(String strTitle, String strText, int resId) { LayoutInflater inflater = (LayoutInflater)MainActivity.this .getSystemService(Context.LAYOUT_INFLATER_SERVICE); // 使用View的对象itemView与R.layout.item关联 View itemView = inflater.inflate(R.layout.listview_item, null); // 通过findViewById()方法实例R.layout.item内各组件 TextView title = (TextView)itemView.findViewById(R.id.itemTitle); title.setText(strTitle); TextView text = (TextView)itemView.findViewById(R.id.itemText); text.setText(strText); ImageView image = (ImageView)itemView.findViewById(R.id.itemImage); image.setImageResource(resId); return itemView; } public View getView(int position, View convertView, ViewGroup parent) { if (convertView == null) return itemViews[position]; return convertView; } } }

2.package yan.activity_11;

import android.os.Bundle;import android.app.Activity;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;public class MainActivity extends Activity { ListView listView; String [] titles={"标题1","标题2","标题3","标题4"}; String [] texts={"文本内容A","文本内容B","文本内容C","文本内容D"}; int [] resIds={R.drawable.icon,R.drawable.icon,R.drawable.icon,R.drawable.icon}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); this.setTitle("BaseAdapter for ListView"); listView=(ListView)this.findViewById(R.id.MyListView); listView.setAdapter(new ListViewAdapter(titles,texts,resIds)); } public class ListViewAdapter extends BaseAdapter{ View [] itemViews; public ListViewAdapter(String [] itemTitles, String [] itemTexts, int [] itemImageRes){ itemViews = new View[itemTitles.length]; for (int i=0; i<itemViews.length; ++i){ itemViews[i] = makeItemView(itemTitles[i], itemTexts[i], itemImageRes[i]); } } public int getCount() { return itemViews.length; } public View getItem(int position) { return itemViews[position]; } public long getItemId(int position) { return position; } private View makeItemView(String strTitle, String strText, int resId) { LayoutInflater inflater = (LayoutInflater)MainActivity.this .getSystemService(Context.LAYOUT_INFLATER_SERVICE); // 使用View的对象itemView与R.layout.item关联 View itemView = inflater.inflate(R.layout.listview_item, null); // 通过findViewById()方法实例R.layout.item内各组件 TextView title = (TextView)itemView.findViewById(R.id.itemTitle); title.setText(strTitle); TextView text = (TextView)itemView.findViewById(R.id.itemText); text.setText(strText); ImageView image = (ImageView)itemView.findViewById(R.id.itemImage); image.setImageResource(resId); return itemView; } public View getView(int position, View convertView, ViewGroup parent) { if (convertView == null) return itemViews[position]; return convertView; } }}

二.“Activity_11\res\layout\main.xml”

<?xml version="1.0" encoding="utf-8"?> <LinearLayout android:id="@+id/LinearLayout01" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"> <ListView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/MyListView"> </ListView> </LinearLayout> <?xml version="1.0" encoding="utf-8"?> <LinearLayout android:id="@+id/LinearLayout01" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"> <ListView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/MyListView"> </ListView> </LinearLayout>

三.“Activity_11\res\layout\listview_item.xml”

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout android:layout_width="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="wrap_content" android:paddingBottom="4dip" android:paddingLeft="12dip"> <ImageView android:layout_width="wrap_content" android:id="@+id/itemImage" android:layout_height="fill_parent"> </ImageView> <TextView android:text="TextView01" android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/itemTitle" android:layout_toRightOf="@+id/itemImage" android:textSize="20dip"> </TextView> <TextView android:text="TextView02" android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/itemText" android:layout_toRightOf="@+id/itemImage" android:layout_below="@+id/itemTitle"> </TextView> </RelativeLayout> <?xml version="1.0" encoding="utf-8"?> <RelativeLayout android:layout_width="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="wrap_content" android:paddingBottom="4dip" android:paddingLeft="12dip"> <ImageView android:layout_width="wrap_content" android:id="@+id/itemImage" android:layout_height="fill_parent"> </ImageView> <TextView android:text="TextView01" android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/itemTitle" android:layout_toRightOf="@+id/itemImage" android:textSize="20dip"> </TextView> <TextView android:text="TextView02" android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/itemText" android:layout_toRightOf="@+id/itemImage" android:layout_below="@+id/itemTitle"> </TextView> </RelativeLayout>