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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.view.Menu;
//import android.view.MenuItem;
public class MainActivity extends Activity
{
private ListView lv_main;
//
private String data[];
private String imageName;
private String name;
private String content;
@SuppressWarnings("rawtypes")
private Map map;
private String from[];
private int to[];
@SuppressWarnings("unchecked")
@override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv_main = (ListView)
findViewById(R.id.lv_main);
//准备集合数据
List> data = new
ArrayList>();
map = new
HashMap();
map.put("icon",R.drawable.f1);
map.put("name","name---1");
map.put("content","content---1");
data.add(map);
for(int i = 2;i <= 10;i ++){
name =
"name---";
content = "content---";
imageName = "R.drawable.f";
name = name+i;
content = content+i;
imageName = imageName+i;
map = new
HashMap();
map.put("icon",imageName);
map.put("name",name);
map.put("content",content);
data.add(map);
}
//map对象key的数组，用于得到value的值
from = new
String[]{"icon","name","content"};
//item布局文件中子view的id数组
to = new
int[]{R.id.iv_item_icon,R.id.tv_item_name,R.id.tv_item_content};
//准备SimpleAdapter
SimpleAdapter simpleAdapter=
newSimpleAdapter(this,data,R.layout.item_simple_adapter,from,to);
//设置Adapter显示列表
lv_main.setAdapter(simpleAdapter);
}
}
请问为什么用下面的代码，可以显示图片
map = new HashMap();
map.put("icon",R.drawable.f1);
map.put("name","name---1");
map.put("content","content---1");
data.add(map);
而用下面的for循环，不能显示图片
for(int i = 2;i <= 10;i++){
name= "name---";
content = "content---";
imageName = "R.drawable.f";
name= name+i;
content = content+i;
imageName =imageName+i;
map =new HashMap();
map.put("icon",imageName);
map.put("name",name);
map.put("content",content);
data.add(map);
}
请各位大神指点，谢谢！！！
学习过程中遇到什么问题或者想获取学习资源的话，欢迎加入Android学习交流群，群号码：364595326 我们一起学Android！