为什么只显示是1条列表,只显示了1条列表,无法显示后3条
代码如下:
package com.example.student201911233;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class MainActivity extends Activity
{
private String[] names = new String[]
{ "虎头","弄玉","李清照","李白"};
private String[] descs = new String[]
{"可爱的小孩","一个擅长音乐的女孩","一个擅长文学的女孩","浪漫主义诗人"};
private int[] imageIds = new int[]
{ R.drawable.laohu,
R.drawable.ic_ma,
R.drawable.ic_she,
R.drawable.ic_zhu};
private int i;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//创建一个List集合,List集合的元素是Map
List<Map<String,Object>> listItems = new ArrayList<Map<String, Object>>();
for (int i=0;i<names.length;i++);{
Map<String,Object> listItem = new HashMap<String, Object>();
listItem.put("header",imageIds[i]);
listItem.put("personName",names[i]);
listItem.put("desc",descs[i]);
listItems.add(listItem);
}
//创建一个SimpleAdapted
SimpleAdapter simpleAdapter = new SimpleAdapter(this,listItems,R.layout.simple_item,
new String[]{ "personName","header","desc"},new int[]{ R.id.name,R.id.header,R.id.desc});
ListView listView = (ListView)findViewById(R.id.mylist);
listView.setAdapter(simpleAdapter);
}
}
这是主布局,就只有一个ListView。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="使用SimpleAdapted创建List View"></TextView>
<ListView
android:id="@+id/mylist"
android:layout_width="match_parent"
android:layout_height="wrap_content"
></ListView>
</LinearLayout>
这是次布局,有一个ImageView和2个TextView
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/header"
android:padding="10dp"></ImageView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/name"
android:textSize="20dp"
android:textColor="#f0f"
android:paddingLeft="10dp"></TextView>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/desc"
android:textSize="14dp"
android:paddingLeft="10dp"></TextView>
</LinearLayout>
</LinearLayout>
private int i;
网上这句话是没有的,但我不加的话,就显示错误了。。。。