SimpleAdapter 编写,运行均没报错,运行后显示是空白的,没有内容。
求大神,学霸解惑。运行结果如下图:

MainActivity.java
package com.example.test_listview;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class MainActivity extends Activity {
private ListView listview_simAdapter;
private SimpleAdapter sim_adapter;
private List<Map<String, Object>> dataList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
dataList=new ArrayList<Map<String,Object>>();
Map<String, Object> map=new HashMap<String, Object>();
map.put("pic",R.drawable.ic_launcher );
map.put("text", "123");
dataList.add(map);
listview_simAdapter=(ListView)findViewById(R.id.listView_SinpleAdapter);
listview_simAdapter.setAdapter(sim_adapter);
sim_adapter=new SimpleAdapter(this, dataList,R.layout.sim_adapter_item,new String[]{"pic","text"},new int[]{R.id.image_button_sim_adpter,R.id.textview_simple_adpter});
}
}activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/container" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" tools:context="com.example.test_listview.MainActivity" tools:ignore="MergeRootFrame" > <ListView android:id="@+id/listView_SinpleAdapter" android:layout_width="match_parent" android:layout_height="wrap_content" > </ListView> </LinearLayout>
sim_adpter_item
<?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="match_parent" android:orientation="horizontal" > <ImageButton android:id="@+id/image_button_sim_adpter" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="20dp" android:layout_marginTop="10dp" android:src="@drawable/ic_launcher" /> <TextView android:id="@+id/textview_simple_adpter" android:layout_width="wrap_content" android:layout_height="57dp" android:layout_marginTop="10dp" android:gravity="center_vertical" android:text="测试数据" android:textSize="20sp" /> </LinearLayout>