ArrayAdapter中list<Object>创建

电玩女神 2022-09-24 12:22 185阅读 0赞

**ArrayAdapter分为两种:**

1.简单的、（String，Integer）  
2.内容丰富的。（Object）  
一、简单的。

// 当然listview 也可以是在layout里写好，然后findViewById()获取出来，这样的话后面就不需setContentView(listview);      
            ListView listview = new ListView(this);  
           ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_expandable_list_item_1);  
           adapter.add("string1");  
            adapter.add("haha");  
            adapter.add("heihei");        
            listview.setAdapter(adapter);  
            setContentView(listview);

activity文件：

package com.example.sqlite;
    
    import java.util.ArrayList;
    
    import android.app.Activity;
    import android.content.Intent;
    import android.os.Bundle;
    import android.util.Log;
    import android.widget.ArrayAdapter;
    import android.widget.ListView;
    import android.widget.SimpleAdapter;
    import android.widget.TextView;
    import android.widget.Toast;
    
    public class ArrayListActivity extends Activity{
        
    
        private ListView mylistview;
        @SuppressWarnings("unchecked")
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            // TODO Auto-generated method stub
            super.onCreate(savedInstanceState);
            setContentView(R.layout.list_layout);
            mylistview = (ListView) findViewById(R.id.mylistview);
            Intent intent = getIntent();
            Bundle bundle = intent.getExtras();
            ArrayList<MyData> lists = (ArrayList<MyData>) bundle.getSerializable("list");
            Toast.makeText(this, "Text:"+lists.size(), Toast.LENGTH_LONG).show();
            UserAdapter2 adapter = new UserAdapter2(this,lists);
            mylistview.setAdapter(adapter);
        }
    
    }