详解Xamarin.Android 利用Fragment实现底部菜单

本篇文章主要介绍了详解xamarin.android 利用fragment实现底部菜单，分享给大家，具体如下：

效果图：

第一步：添加引用

引用 crosslight.xamarin.android.support.v7.appcompat 这个包。

第二步：绘制main和fragment界面

fg_home.axml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#ffffff">
  <textview
    android:id="@+id/txt_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:text="首页"
    android:textcolor="#000000"
    android:textsize="20sp" />
</linearlayout>

fg_label.axml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#ffffff">
  <textview
    android:id="@+id/txt_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:text="贴签"
    android:textcolor="#000000"
    android:textsize="20sp" />
</linearlayout>

fg_mine.axml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#ffffff">
  <textview
    android:id="@+id/txt_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:text="我的"
    android:textcolor="#000000"
    android:textsize="20sp" />
</linearlayout>

fg_query.axml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#ffffff">
  <textview
    android:id="@+id/txt_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:text="查询"
    android:textcolor="#000000"
    android:textsize="20sp" />
</linearlayout>

main.axml

<?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"> 
  <include
    layout="@layout/main_left" />
</linearlayout>

main_left.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.drawerlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/dl_left"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#f0f0f0">
 <!--主布局-->
 <linearlayout
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="horizontal"> 
  <relativelayout
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:id="@+id/relativelayout1" 
   android:fitssystemwindows="true">
   <relativelayout
     android:id="@+id/ly_top_bar"
     android:layout_width="match_parent"
     android:layout_height="48dp" 
     android:visibility="gone"> 
   </relativelayout>
   <linearlayout
      android:id="@+id/ly_tab_bar"
      android:layout_width="match_parent"
      android:layout_height="50dp"
      android:layout_alignparentbottom="true" 
      android:background="#ffffff"
       android:orientation="vertical">

    <view
      android:layout_width="match_parent"
      android:layout_height="2px"
      android:background="#cccccc" />
    <linearlayout
      android:layout_width="match_parent"
      android:layout_height="40dp"
      android:orientation="horizontal"
      android:layout_margintop="5dp">
     <imageview 
      android:id="@+id/iv_home"
      android:layout_width="25.6dp"
      android:layout_height="37.6dp"
      android:src="@drawable/icon_home1"
      android:layout_weight="1"/>
     <imageview 
      android:id="@+id/iv_query"
      android:layout_width="25.6dp"
      android:layout_height="37.6dp"
      android:src="@drawable/icon_query1"
      android:layout_weight="1"/>
     <imageview 
      android:id="@+id/iv_label"
     android:layout_width="25.6dp"
      android:layout_height="37.6dp"
      android:src="@drawable/icon_label1"
      android:layout_weight="1"/>
     <imageview 
      android:id="@+id/iv_mine"
      android:layout_width="25.6dp"
      android:layout_height="37.6dp"
      android:src="@drawable/icon_mine1"
      android:layout_weight="1"/> 
    </linearlayout>
   </linearlayout>
   <view
     android:id="@+id/div_tab_bar"
     android:layout_width="match_parent"
     android:layout_height="2px"
     android:background="#ffffff"
     android:layout_above="@id/ly_tab_bar" />
   <framelayout
     android:layout_width="match_parent"
     android:layout_height="match_parent"
      android:id="@+id/fy_home"
     android:layout_below="@id/ly_top_bar"
     android:layout_above="@id/div_tab_bar" />
   <framelayout
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/fy_query"
      android:layout_below="@id/ly_top_bar"
     android:layout_above="@id/div_tab_bar"/>
   <framelayout
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/fy_label"
      android:layout_below="@id/ly_top_bar"
     android:layout_above="@id/div_tab_bar"/>
   <framelayout
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/fy_mine"
      android:layout_below="@id/ly_top_bar"
     android:layout_above="@id/div_tab_bar"/>
  </relativelayout>
 </linearlayout> 
</android.support.v4.widget.drawerlayout>

第三步：在value文件下创建style，并且自定义 baseapptheme 样式

<?xml version="1.0" encoding="utf-8" ?>
<resources> 
  
 <color name="primary">#1e89e7</color>
 <color name="primarydark">#1976d2</color>
 <color name="red">#ff0000</color>
 <color name="white">#ffffff</color>

 <style name="baseapptheme" parent="theme.appcompat.light.darkactionbar">
  <item name="windowactionbar">false</item>
  <item name="windownotitle">true</item>
  <item name="colorprimary">@color/primary</item>
  <item name="colorprimarydark">@color/primarydark</item>
  <item name="drawerarrowstyle">@style/apptheme.drawerarrowtoggle</item>
 </style>

 <style name="apptheme.drawerarrowtoggle" parent="base.widget.appcompat.drawerarrowtoggle">
  <item name="color">@android:color/white</item>
 </style>
</resources>

第四步：编写每个fragment的后台，这里只写一个。

using system;
using system.collections.generic;
using system.linq;
using system.text;

using android.app;
using android.content;
using android.os;
using android.runtime;
using android.util;
using android.views;
using android.widget;

namespace bottommunedemo.fragments
{
  public class homefragment : fragment
  {
    private string content { get; set; }
    public homefragment(string content)
    {
      this.content = content;
    }

    public override void oncreate(bundle savedinstancestate)
    {
      base.oncreate(savedinstancestate);

      // create your fragment here
    }

    public override view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate)
    {
      view view = inflater.inflate(resource.layout.fg_home, container, false);
      textview txt_content = (textview)view.findviewbyid(resource.id.txt_content);
      txt_content.text = "首页";

      return view;
    }
  }
}

第五步：在main活动中进行设置。

using android.app;
using android.widget;
using android.os;
using android.support.v7.app;
using bottommunedemo.fragments;
using android.views;

namespace bottommunedemo
{
  [activity(label = "bottommunedemo", mainlauncher = true, theme = "@style/baseapptheme")]
  public class mainactivity : appcompatactivity
  {
    private imageview iv_home;
    private imageview iv_query;
    private imageview iv_label;
    private imageview iv_mine;

    private framelayout fy_home;
    private framelayout fy_query;
    private framelayout fy_label;
    private framelayout fy_mine;

    homefragment fg1;
    queryfragment fg2;
    labelfragment fg3;
    minefragment fg4;

    protected override void oncreate(bundle savedinstancestate)
    {
      base.oncreate(savedinstancestate); 
      setcontentview(resource.layout.main);

      fy_home = (framelayout)findviewbyid(resource.id.fy_home);
      fy_query = (framelayout)findviewbyid(resource.id.fy_query);
      fy_label = (framelayout)findviewbyid(resource.id.fy_label);
      fy_mine = (framelayout)findviewbyid(resource.id.fy_mine);

      iv_home = (imageview)findviewbyid(resource.id.iv_home);
      iv_query = (imageview)findviewbyid(resource.id.iv_query);
      iv_label = (imageview)findviewbyid(resource.id.iv_label);
      iv_mine = (imageview)findviewbyid(resource.id.iv_mine);

      bindviews();
      iv_home.performclick();

    }


    #region 底部菜单选项卡 

    //ui组件初始化与事件绑定
    private void bindviews()
    {

      iv_home.click += (s, e) => { onclick(iv_home); };
      iv_query.click += delegate { onclick(iv_query); };
      iv_label.click += delegate { onclick(iv_label); };
      iv_mine.click += delegate { onclick(iv_mine); };
    }
    //隐藏所有fragment
    private void hideallfragment(fragmenttransaction fragmenttransaction)
    {
      if (fg1 != null) fragmenttransaction.hide(fg1);
      if (fg2 != null) fragmenttransaction.hide(fg2);
      if (fg3 != null) fragmenttransaction.hide(fg3);
      if (fg4 != null) fragmenttransaction.hide(fg4);

      iv_home.setimageresource(resource.drawable.icon_home1);
      iv_query.setimageresource(resource.drawable.icon_query1);
      iv_label.setimageresource(resource.drawable.icon_label1);
      iv_mine.setimageresource(resource.drawable.icon_mine1);
    }
    //重置所有文本的选中状态
    private void setselected()
    {
      iv_home.selected = false;
      iv_query.selected = false;
      iv_label.selected = false;
      iv_mine.selected = false;
    }
    //单击事件
    public void onclick(view v)
    {
      fragmenttransaction ftransaction = fragmentmanager.begintransaction();
      hideallfragment(ftransaction);
      switch (v.id)
      {
        case resource.id.iv_home:
          setselected();
          iv_home.selected = true;
          iv_home.setimageresource(resource.drawable.icon_home2);
          if (fg1 == null)
          {
            fg1 = new homefragment("首页");
            ftransaction.add(resource.id.fy_home, fg1);
          }
          else { ftransaction.show(fg1); }
          break;

        case resource.id.iv_query:
          setselected();
          iv_query.selected = true;
          iv_query.setimageresource(resource.drawable.icon_query2);
          if (fg2 == null)
          {
            fg2 = new queryfragment("查询");
            ftransaction.add(resource.id.fy_query, fg2);
          }
          else { ftransaction.show(fg2); }
          break;

        case resource.id.iv_label:
          setselected();
          iv_label.selected = true;
          iv_label.setimageresource(resource.drawable.icon_label2);
          if (fg3 == null)
          {
            fg3 = new labelfragment("贴签");
            ftransaction.add(resource.id.fy_label, fg3);
          }
          else { ftransaction.show(fg3); }
          break;

        case resource.id.iv_mine:
          setselected();
          iv_mine.selected = true;
          iv_mine.setimageresource(resource.drawable.icon_mine2);
          if (fg4 == null)
          {
            fg4 = new minefragment("我的");
            ftransaction.add(resource.id.fy_mine, fg4);
          }
          else { ftransaction.show(fg4); }
          break;
      }
      ftransaction.commit();
    }
    #endregion 
  }
}

到这里就结束了，亲测代码有效，如有问题请留言。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。