我要评论本文实例为大家分享了android仿美团下拉菜单的实现代码，分类进行选择，供大家参考，具体内容如下
效果图
操作平台
as2.0
第三方框架：butterknife
build.gradle
dependencies {
compile filetree(dir: 'libs', include: ['*.jar'])
testcompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.jakewharton:butterknife:7.0.1'
}
实现代码
1、实现逻辑：主要利用spinner与baseadapter来实现菜单下拉。具体美观效果要靠各个控件的调整，以及必要的分割线添加。
2、核心代码
适配器的item代码：item_main.xml
<?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"
android:orientation="vertical"
>
<textview
android:id="@+id/item_main_tv"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginleft="16dp"
android:background="#fff"
android:gravity="center_vertical"
android:singleline="true"
android:text="测试文字"
android:textsize="15dp"
/>
<!--分割线-->
<textview
android:id="@+id/main_tv_line"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginleft="16dp"
android:layout_marginright="16dp"
android:background="#edecec"/>
</linearlayout>
主页面布局文件activity_main.xml
<?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"
android:orientation="vertical"
>
<linearlayout
android:layout_width="match_parent"
android:layout_height="40dp"
>
<spinner
android:id="@+id/main_sp1"
style="@style/style_spinner">
</spinner>
<!--这个是spinner之间的分割线-->
<imageview
style="@style/style_mian_verline"/>
<spinner
android:id="@+id/main_sp2"
style="@style/style_spinner"
></spinner>
<imageview
style="@style/style_mian_verline"/>
<spinner
android:id="@+id/main_sp3"
style="@style/style_spinner"
></spinner>
</linearlayout>
<!--设置一条分割线-->
<textview
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#dcdcdc"
/>
<linearlayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff">
<textview
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="我是分类下面的正文内容"/>
</linearlayout>
</linearlayout>
style文件
<!--spinner的样式-->
<style name="style_spinner">
<item name="android:layout_width">0dp</item>
<item name="android:layout_height">40dp</item>
<item name="android:layout_weight">1</item>
<item name="android:dropdownverticaloffset">40dp</item>
<item name="android:dropdownwidth">1000dp</item>
</style>
<!--定义spinner之间的线的样式-->
<style name="style_mian_verline">
<item name="android:layout_width">1dp</item>
<item name="android:layout_height">25dp</item>
<item name="android:background">#dcdcdc</item>
<item name="android:layout_gravity">center_vertical</item>
</style>
mainactivity与适配器写在了一起，便于操作
public class mainactivity extends appcompatactivity {
@bind(r.id.main_sp1)
spinner mmainsp1;
@bind(r.id.main_sp2)
spinner mmainsp2;
@bind(r.id.main_sp3)
spinner mmainsp3;
private list<string> data_list1;
private list<string> data_list2;
private list<string> data_list3;
private baseadapter arr_adapter;//适配器
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
butterknife.bind(this);
initdata();
initadapter();
setlistener();
}
//设置监听事件，将来商家列表的排序都在这里面处理
private void setlistener() {
mmainsp1.setonitemselectedlistener(new adapterview.onitemselectedlistener() {
@override
public void onitemselected(adapterview<?> parent, view view, int position, long id) {
toast.maketext(mainactivity.this, "点击了"+data_list1.get(position), toast.length_short).show();
}
@override
public void onnothingselected(adapterview<?> parent) {
}
});
mmainsp2.setonitemselectedlistener(new adapterview.onitemselectedlistener() {
@override
public void onitemselected(adapterview<?> parent, view view, int position, long id) {
toast.maketext(mainactivity.this, "点击了"+data_list2.get(position), toast.length_short).show();
}
@override
public void onnothingselected(adapterview<?> parent) {
}
});
mmainsp3.setonitemselectedlistener(new adapterview.onitemselectedlistener() {
@override
public void onitemselected(adapterview<?> parent, view view, int position, long id) {
toast.maketext(mainactivity.this, "点击了"+data_list3.get(position), toast.length_short).show();
}
@override
public void onnothingselected(adapterview<?> parent) {
}
});
}
private void initadapter() {
//适配器
arr_adapter = new myadapter(data_list1);
mmainsp1.setadapter(arr_adapter);
//适配器
arr_adapter = new myadapter(data_list2);
mmainsp2.setadapter(arr_adapter);
//适配器
arr_adapter = new myadapter(data_list3);
mmainsp3.setadapter(arr_adapter);
}
//设置数据来源，这个要在网络获取。由于数据不会太多，不再考虑性能优化问题
private void initdata() {
//数据
data_list1 = new arraylist<>();
data_list1.add("全部分类");
data_list1.add("零食");
data_list1.add("水果");
data_list1.add("洗衣");
data_list1.add("洗车");
data_list1.add("茶饮");
//数据
data_list2 = new arraylist<>();
data_list2.add("商圈");
data_list2.add("郑州航院");
data_list2.add("华北水利水电大学");
data_list2.add("河南中医大学");
data_list2.add("河南财经大学");
//数据
data_list3 = new arraylist<>();
data_list3.add("智能排序");
data_list3.add("好评优先");
data_list3.add("离我最近");
data_list3.add("价格最低");
}
//适配器
class myadapter extends baseadapter {
private layoutinflater mlayoutinflater;
private list<string> mdatalist;
myadapter(list<string> datalist) {
this.mdatalist = datalist;
mlayoutinflater = layoutinflater.from(mainactivity.this);
}
@override
public int getcount() {
return mdatalist.size();
}
@override
public object getitem(int position) {
return mdatalist.get(position);
}
@override
public long getitemid(int position) {
return position;
}
//数据不太多，没有使用viewholder进行处理。
@override
public view getview(int position, view convertview, viewgroup parent) {
convertview = view.inflate(mainactivity.this, r.layout.item_main, null);
textview textview = (textview) convertview.findviewbyid(r.id.item_main_tv);
textview.settext(mdatalist.get(position));
return convertview;
}
}
}
以上就是本文的全部内容，希望对大家学习android软件编程有所帮助。
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