groupsthat can be easily expanded and collapsed by touching to view and their respectivechildrenitems.ExpandableListViewAdapterin android loads the data into the items associated with this view. Following are some important methods that are used by this class : setChildIndicator(Drawable): This is ...
1 简单的android项目创建在此省略。例子结构如图：2 首先创建测试用的实体类（用来存储要显示的数据）类名：Element_testpackage com.example.android_example;/*** 测试用的实体类** @author aboutych**/public class Element_test {String id;String name;public String getId() {return id;}public void ...
<RelativeLayout 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" tools:context=".MainActivity" > <ExpandableListView android:id="@+id/expendlist" android:layout_wid...
publicclassMainActivityextendsAppCompatActivity{privateListView listView;privateCustomAdapter customAdapter;@OverrideprotectedvoidonCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);listView=findViewById(R.id.list_view);// 准备数据源,这里以一个字符串...
1package com.example.winxin2;23import java.util.ArrayList;4import java.util.List;56import com.example.entity.Message;78import android.app.Activity;9import android.os.Bundle;10import android.util.Log;11import android.view.ContextMenu;12import android.view.ContextMenu.ContextMenuInfo;13import android...
1.ListVeiw 用来展示列表的View。 2.适配器 用来把数据映射到ListView上的中介。 3.数据 具体的将被映射的字符串,图片,或者基本组件。 根据列表的适配器类型,列表分为三种,ArrayAdapter,SimpleAdapter和SimpleCursorAdapter UI: ListView Activity: 1packagecom.example.android_listview;23importjava.util.ArrayList;4impo...
android:id="@+id/list_view" android:layout_width="match_parent" android:layout_height="match_parent"/> </LinearLayout> MainActivity为: package com.example.listviewtest; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; ...
List view example app Now we'll build a simple Windows Store app that uses theListViewcontrol to show a list of photos. Here's what the Android version of this app looks like. And here's what the equivalent Windows Store app looks like. ...
tools:context="com.example.expandablelistview.MainActivity" > <ExpandableListView android:id="@+id/my_listview" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginLeft="8dp" android:layout_marginRight="8dp" ...
获取单选框选中内容的思路是:设置一个参数接收选中内容,之后判断每一个单选框是否被选中,如果选中则将内容赋值给参数。 MainActivity.java文件的代码如下: 代码语言:javascript 复制 packagecom.example.radio_checkbox;importandroidx.appcompat.app.AppCompatActivity;importandroid.os.Bundle;importandroid.view.View;impor...