Android_ListView的简单用法_android listview宽高-优快云博客

本文链接：https://blog.youkuaiyun.com/m0_64139004/article/details/128091803

本文介绍了如何在Android应用中创建一个基本的ListView，展示了如何设置ListView的宽度和高度，以及如何通过ArrayAdapter填充数据。内容包括XML布局文件和Java代码实现，适合初学者理解列表视图的基本用法。

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activity_main.xml代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ListView
        android:id="@+id/list_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</LinearLayout>

将listview的宽度和高度都设置为match_parent，这样listview就能占满整个空间

MainActivity.java代码

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainActivity extends AppCompatActivity {

    private String[] data = {"apple","Banana","Orange","watermelon","Pear",
            "Grape","Pineapple","Strawberry","Cherry","Mango","apple","Banana","Orange","watermelon","Pear",
            "Grape","Pineapple","Strawberry","Cherry","Mango"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(
                MainActivity.this, android.R.layout.simple_list_item_1,data);
        ListView listView = (ListView) findViewById(R.id.list_view);
        listView.setAdapter(adapter);
    }
}

数据来源可以是从网上下载的，也可以是从数据库中读取的，这里使用data数组来测试。