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  • Android开发之ListView-SimpleAdapter的使用

    SimpleAdapter:

    SimpleAdapter(Context context, List<? extends Map<String, ?>> data, int resource, String[] from, int[] to)

    参数:

    1.context:上下文

    2.data:Map<String, object>列表,列表要显示的数据,Map列表中的key要与参数”from“中的内容保持一致

    3.resource:item的布局文件,这个布局中必须包括参数”to“中定义的控件id

    4.from:表示该Map对象的key对应value来生成列表项

    5.to:表示来填充的组件 Map对象key对应的资源一依次填充组件 顺序有对应关系

    ListView的SimpleAdapter的使用

    代码:

     1 import java.util.ArrayList;
     2 import java.util.HashMap;
     3 import java.util.List;
     4 import java.util.Map;
     5 
     6 import android.app.Activity;
     7 import android.os.Bundle;
     8 import android.widget.ListView;
     9 import android.widget.SimpleAdapter;
    10 
    11 public class MainActivity extends Activity {
    12 
    13     private ListView lv;
    14 
    15     @Override
    16     protected void onCreate(Bundle savedInstanceState) {
    17         super.onCreate(savedInstanceState);
    18         setContentView(R.layout.activity_main);
    19 
    20         List<Map<String, Object>> data = new ArrayList<>();
    21 
    22         Map<String, Object> map1 = new HashMap<>();
    23         map1.put("photo", R.drawable.img01);
    24         map1.put("name", "小志");
    25         data.add(map1);
    26 
    27         Map<String, Object> map2 = new HashMap<>();
    28         map2.put("photo", R.drawable.img02);
    29         map2.put("name", "小志的儿子");
    30         data.add(map2);
    31 
    32         Map<String, Object> map3 = new HashMap<>();
    33         map3.put("photo", R.drawable.img03);
    34         map3.put("name", "小志的老婆");
    35         data.add(map3);
    36 
    37         Map<String, Object> map4 = new HashMap<>();
    38         map4.put("photo", R.drawable.img04);
    39         map4.put("name", "萌萌");
    40         data.add(map4);
    41 
    42         lv = (ListView) findViewById(R.id.lv);
    43 
    44         lv.setAdapter(new SimpleAdapter(this, data, R.layout.item_view,
    45                 new String[] { "photo", "name" }, new int[] { R.id.lv_phono,
    46                         R.id.lv_name }));
    47 
    48     }
    49 
    50 }

    item_view布局文件:

     1 <?xml version="1.0" encoding="utf-8"?>
     2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     3     android:layout_width="match_parent"
     4     android:layout_height="wrap_content"
     5     android:orientation="horizontal" >
     6 
     7     <ImageView
     8         android:id="@+id/lv_phono"
     9         android:layout_width="60dp"
    10         android:layout_height="60dp"
    11         android:src="@drawable/img01" />
    12 
    13     <TextView
    14         android:id="@+id/lv_name"
    15         android:layout_width="wrap_content"
    16         android:layout_height="wrap_content"
    17         android:layout_gravity="center_vertical"
    18         android:text="名字"
    19         android:textSize="20sp" />
    20 
    21 </LinearLayout>
    activity_main布局文件:
     1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     2     xmlns:tools="http://schemas.android.com/tools"
     3     android:layout_width="match_parent"
     4     android:layout_height="match_parent"
     5     tools:context=".MainActivity" >
     6 
     7     <ListView
     8         android:id="@+id/lv"
     9         android:layout_width="match_parent"
    10         android:layout_height="match_parent" >
    11     </ListView>
    12 
    13 </RelativeLayout>
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  • 原文地址:https://www.cnblogs.com/liyiran/p/5049739.html
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