Xamarin.Android 利用Fragment實現底部選單

摘要： 效果圖： 第一步：新增引用 引用 Crosslight.Xamarin.Android.Support.v7.AppCompat 這個包。 第二步：繪製Main和Fragment介面 fg_home.axml <?xml version="...

效果圖：

第一步：新增引用

引用 Crosslight.Xamarin.Android.Support.v7.AppCompat 這個包。

第二步：繪製Main和Fragment介面

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="首頁"
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="貼籤"
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="查詢"
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">
<!--主佈局-->
<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檔案下建立Style，並且自定義 BaseAppTheme 樣式

<?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：編寫每個Fragment的後臺，這裡只寫一個。

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 = "首頁";

return view;
}
}
}

第五步：在Main活動中進行設定。

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 底部選單選項卡 

//ui元件初始化與事件繫結
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); };
}
//隱藏所有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);
}
//重置所有文字的選中狀態
private void setSelected()
{
iv_home.Selected = false;
iv_query.Selected = false;
iv_label.Selected = false;
iv_mine.Selected = false;
}
//單擊事件
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("首頁");
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("查詢");
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("貼籤");
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
}
}

到這裡就結束了，親測程式碼有效，如有問題請留言。