ListView 的使用

来源：互联网发布：华为数据分析师招聘编辑：程序博客网时间：2024/06/03 13:41

实现

1 在main的xml布局中创建一个listview

2 新建一个item的xml作为listview的子布局实体类

3 创建一个myitem的实体类

4 创建一个adapter

5 为listview设置adapter

一 activity_main.xml

<?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">    <ListView        android:id="@+id/listView"        android:layout_width="fill_parent"        android:layout_height="fill_parent">    </ListView></LinearLayout>

二 item.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent">    <TextView        android:gravity="center"        android:id="@+id/text"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="这是0"        android:layout_alignParentTop="true"        android:layout_alignBottom="@+id/button" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="确定"        android:layout_alignParentTop="true"        android:layout_alignParentRight="true"        android:layout_alignParentEnd="true"        android:id="@+id/button" /></RelativeLayout>

三 MyItem.java

package com.test.listview;public class MyItem {    private String text;    MyItem(String text){        this.text=text;    }    public void setText(String text) {        this.text = text;    }    public String getText() {        return text;    }}

四 MyAdapter.java

package com.test.listview;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ArrayAdapter;import android.widget.TextView;import java.util.List;public class MyAdapter extends ArrayAdapter<MyItem> {    int resource;    Context context;    public MyAdapter(Context context, int resource, List<MyItem> objects) {        super(context, resource, objects);        this.resource=resource;        this.context=context;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        View view= LayoutInflater.from(context).inflate(resource,null);        MyItem myItem=getItem(position);        TextView textView= (TextView) view.findViewById(R.id.text);        textView.setText(myItem.getText());        return view;    }}

五 MainActivity.java

package com.test.listview;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.ListView;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);

        List<MyItem> list=new ArrayList<MyItem>();//存放数据的list        ListView listView= (ListView) findViewById(R.id.listView);        MyItem myItem=new MyItem("这个一");        list.add(myItem);        MyItem myItem2=new MyItem("这个二");        list.add(myItem2);        MyItem myItem3=new MyItem("这个三");        list.add(myItem3);        MyItem myItem4=new MyItem("这个四");        list.add(myItem4);        MyItem myItem5=new MyItem("这个五");        list.add(myItem5);        MyItem myItem6=new MyItem("这个六");        list.add(myItem6);        MyItem myItem7=new MyItem("这个七");        list.add(myItem7);        MyItem myItem8=new MyItem("这个八");        list.add(myItem8);        MyAdapter myAdapter=new MyAdapter(MainActivity.this,R.layout.item,list);//实体适配器        listView.setAdapter(myAdapter);//设置适配器    }}

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