Question

android.. R.layout.simple_item, new String[] { "", "", "" }, ///此处的from字符串数组这样写正确吗？

import java.util.ArrayList;

import android.app.Activity;

public class SimpleAdapterTest extends Activity {

private String[] names = new String[] { "张三", "李四", "王五", "赵六" };
private String[] descs = new String[] { "一个农民", "一个长工", "一个混混", "一个捕快" };
private int[] imageIds = new int[] { R.drawable.ic_launcher,
R.drawable.ic_launcher, R.drawable.ic_launcher,
R.drawable.ic_launcher };

@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]); //////HashMap，put了三次，这样也正确？不理解啊？
listItem.put("personName", names[i]);
listItem.put("desc", descs[i]);
listItems.add(listItem);
// 创建一个SimpleAdapter
SimpleAdapter simpleAdapter = new SimpleAdapter(this, listItems,
R.layout.simple_item, new String[] { "", "", "" }, ////////此处的from字符串数组这样写正确吗？
new int[] { R.id.name, R.id.header, R.id.desc });
ListView listView = (ListView) findViewById(R.id.mylistView);
// 为ListView设置Adapter
listView.setAdapter(simpleAdapter);
}
}

}

Answer 1

arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_single_choice, arrayList);
pairedDevicesListView.setAdapter(arrayAdapter);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);