Android Course---optimized listview list view

Activity_ui4.xml

<? XML version= "1.0" encoding= "Utf-8" ?> <  xmlns:android= "http://schemas.android.com/apk/res/android"    Android:layout_ Width= "Match_parent"    android:layout_height= "Match_parent"     Android:id= "@+id/sa_1"></ListView>

Layout_simple.xml

<?XML version= "1.0" encoding= "Utf-8"?><LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content">    <ImageViewAndroid:layout_width= "70DP"Android:layout_height= "70DP"android:src= "@drawable/yuantu"Android:id= "@+id/lv2"/>    <LinearLayoutAndroid:layout_width= "Match_parent"Android:layout_height= "Wrap_content"android:orientation= "vertical"android:layout_gravity= "Center_vertical"Android:layout_marginleft= "20DP">        <TextViewAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "Food Pictures"Android:id= "@+id/tv1"/>        <TextViewAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "very tasty."Android:id= "@+id/tv2"/>    </LinearLayout></LinearLayout>

Uiactivity4.java

 PackageCom.hanqi.test5;ImportAndroid.os.Bundle;Importandroid.support.v7.app.AppCompatActivity;ImportAndroid.widget.ListView;ImportAndroid.widget.SimpleAdapter;Importjava.util.ArrayList;Importjava.util.Hashtable;Importjava.util.List;ImportJava.util.Map; Public classUIActivity4extendsappcompatactivity {@Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.LAYOUT.ACTIVITY_UI4); ListView sa_1=(ListView) Findviewbyid (r.id.sa_1); //preparing the data sourcelist<map<string,object>> LM =NewArraylist<map<string,object>>(); Map<String,Object> map =NewHashtable<string, object>(); Map.put ("Image", R.drawable.yuantu); Map.put ("Name", "Gourmet picture 01"); Map.put ("Content", "very good 01");        Lm.add (map); Map=NewHashtable<string, object>(); Map.put ("Image", R.drawable.yuantu); Map.put ("Name", "Gourmet picture 02"); Map.put ("Content", "very good 02");        Lm.add (map); Map=NewHashtable<string, object>(); Map.put ("Image", R.drawable.yuantu); Map.put ("Name", "Gourmet picture 03"); Map.put ("Content", "very good 03");        Lm.add (map); Map=NewHashtable<string, object>(); Map.put ("Image", R.drawable.yuantu); Map.put ("Name", "Gourmet picture 04"); Map.put ("Content", "very good 04");        Lm.add (map); //1. The key array in the array sourcestring[] Str ={"image", "name", "content"}; //the ID of the face view in the 2.layout file        int[] Viewid ={R.ID.LV2,R.ID.TV1,R.ID.TV2,}; Simpleadapter SA=NewSimpleadapter ( This, Lm,r.layout.layout_simple,str,viewid);    Sa_1.setadapter (SA); }}

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Android Course---optimized listview list view