ListView.CHOICE_MODE_MULTIPLE

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<ListView android:id="@+id/list"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:cacheColorHint="@null"
  />
  <Button android:id="@+id/btn"
  	android:layout_width="fill_parent"
  	android:layout_height="wrap_content"
  	android:text="获取选中ID"
  />
</LinearLayout>

一个ListView,一个Button

package com.pocketdigi;
 
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
 
public class Test2Activity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        final ListView lv=(ListView)findViewById(R.id.list);
        String[] Names=new String[]{"a","b","c"};
        ArrayAdapter<String> Adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_multiple_choice, Names);
        //使用系统内置的layout
        lv.setAdapter(Adapter);
        lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        //设置多选模式
        Button btn=(Button)findViewById(R.id.btn);
        btn.setOnClickListener(new OnClickListener(){
 
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				long[] ids=lv.getCheckItemIds();
				//得到选中的itemId
				String str="";
				for(int i=0;i<ids.length;i++){
					str+=ids[i]+",";
				}
				Toast.makeText(Test2Activity.this, str, Toast.LENGTH_LONG).show();
				//输出ID
			}});
    }
}