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VS 2015 开发Android底部导航条----[实例代码,多图]

發布時間：2024/6/30 Android 56 豆豆

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1.廢話背景介紹?

在Build 2016開發者大會上，微軟宣布，Xamarin將被整合進所有版本的Visual Studio之中。

這也就是說，Xamarin將免費提供給所有購買了Visual Studio的開發者使用。這樣一來，開發者就能利用 .NET和C#工具，開發Android和iOS應用程序了。重要的是，Xamarin與Visual Studio的整合沒有任何限制。盡管未被收購前，Xamarin也提供免費版給開發者使用，但該免費版只支持小型可執行程序。想要在Xamarin上開發大型可執行程序的話，開發者還是得先花錢買授權。但現在情況不同了，開發者除了無法自由使用Xamarin部分面向企業客戶的功能，其它所有工具都可免費使用。重要的是，現在Xamarin Studio還支持在OS X平臺上使用。此外微軟表示，幾周后將完全開放Xamarin SDK。這意味著Xamarin的運行環境、庫文件界面和編碼工具，將被公布在Github上，由 .NET Foundation進行管理。與此同時，供開發者構建用戶界面的跨平臺工具包Xamarin Forms也將開源。

前面都是科普廢話,上正文.

2.環境安裝?

抱著試一試的心態,更新了VS 2015 Updata2, 因為以前就玩過Xamarin,注冊了帳號發現升級后還是使用過去,很郁悶以為微軟忽悠我們呢.

試著找找無意中在Tools --> Options ?--> Other 里面看到 Xamarin for Visual Studio Updatas

咦這是什么鬼?

點擊 Check Now 試試如圖:

等到一段時間, 墻的威力太大,有必要的話請FQ更新.另外Android SDK NDK的安裝(什么,你知道怎么安裝,請baidu一下)也請FQ,下載鏡像可以設置為東軟的鏡像?mirrors.neusoft.edu.cn

如圖:

?這些下載更新快多了.

環境這些準備好了.

我們來回歸正題.?

?3.Android底部導航條

?終于可以寫代碼了,開始不了解Xamarin Android的原理,還導出找教程,尼瑪最后才知道不管Android還是IOS Xamarin都可以直接使用原生的界面布局加C#語法編譯打包.這下簡單了找個原生的例子直接使用,略加翻譯Java-->C#即可,Java C#相似度極高. 聰明的你們肯定一看就會.以下實例本人均翻譯至Java的實例.

簡單說說原理,主要使用TabActivity TabHost Intent. 你問我他們分別是干什么的? 呃!~~~ 這個可以將一本書了, 用了你就知道了.

現在?TabActivity據說已經過時?Fragment已取代了他.有興趣的朋友可以試試,找個例子改改.

TabActivity在API 13（Android 3.2）被標記為過期，需要使用Fragment來實現，Fragment是Android 3.0引入的一個概念，主要就是為了適應各種不同的屏

?先上張效果圖,這是最終要實現的樣子:

?開始建工程?

?這個大家都會吧,不多說.

創建Maintabs.axml?

xml?version="1.0"?encoding="utf-8"?>
<TabHost?xmlns:android="http://schemas.android.com/apk/res/android"
????android:id="@android:id/tabhost"
????android:layout_width="fill_parent"
????android:layout_height="fill_parent">
????<LinearLayout
????????android:orientation="vertical"
????????android:layout_width="fill_parent"
????????android:layout_height="fill_parent">
????????<FrameLayout
????????????android:id="@android:id/tabcontent"
????????????android:layout_width="fill_parent"
????????????android:layout_height="0.0dip"
????????????android:layout_weight="1.0"?/>
????????<TabWidget
????????????android:id="@android:id/tabs"
????????????android:visibility="gone"
????????????android:layout_width="fill_parent"
????????????android:layout_height="wrap_content"
????????????android:layout_weight="0.0"?/>
????????<RadioGroup
????????????android:gravity="center_vertical"
????????????android:layout_gravity="bottom"
????????????android:orientation="horizontal"
????????????android:id="@+id/main_radio"
????????????android:background="@drawable/maintab_toolbar_bg"
????????????android:layout_width="fill_parent"
????????????android:layout_height="wrap_content">
????????????<RadioButton
????????????????android:id="@+id/radio_button0"
????????????????android:layout_marginTop="2.0dip"
????????????????android:text="@string/main_home"
????????????????android:drawableTop="@drawable/icon_1_n"
????????????????style="@style/main_tab_bottom"?/>
????????????<RadioButton
????????????????android:id="@+id/radio_button1"
????????????????android:layout_marginTop="2.0dip"
????????????????android:text="@string/main_news"
????????????????android:drawableTop="@drawable/icon_2_n"
????????????????style="@style/main_tab_bottom"?/>
????????????<RadioButton
????????????????android:id="@+id/radio_button2"
????????????????android:layout_marginTop="2.0dip"
????????????????android:text="@string/main_manage_date"
????????????????android:drawableTop="@drawable/icon_3_n"
????????????????style="@style/main_tab_bottom"?/>
????????????<RadioButton
????????????????android:id="@+id/radio_button3"
????????????????android:layout_marginTop="2.0dip"
????????????????android:text="@string/main_friends"
????????????????android:drawableTop="@drawable/icon_4_n"
????????????????style="@style/main_tab_bottom"?/>
????????????<RadioButton
????????????????android:id="@+id/radio_button4"
????????????????android:layout_marginTop="2.0dip"
????????????????android:text="@string/more"
????????????????android:drawableTop="@drawable/icon_5_n"
????????????????style="@style/main_tab_bottom"?/>
????????RadioGroup>
????LinearLayout>

TabHost>?

修改?MainActivity.cs

1?using?System;
2?using?Android.App;
3?using?Android.Content;
4?using?Android.Runtime;
5?using?Android.Views;
6?using?Android.Widget;
7?using?Android.OS;
8?
9?namespace?MyAppTest
10?{
11?????[Activity(Label?=?"MyAppTest",?MainLauncher?=?true,?Icon?=?"@drawable/icon",Theme?=?"@android:style/Theme.DeviceDefault.NoActionBar")]
12?????public?class?MainTabActivity?:?TabActivity,?CompoundButton.IOnCheckedChangeListener
13?????{
14?????????private?TabHost?mTabHost;
15?????????private?Intent?mAIntent;
16?????????private?Intent?mBIntent;
17?????????private?Intent?mCIntent;
18?????????private?Intent?mDIntent;
19?????????private?Intent?mEIntent;
20?????????
21?????????protected?override?void?OnCreate(Bundle?bundle)
22?????????{
23?????????????base.OnCreate(bundle);
24?????????????RequestWindowFeature(WindowFeatures.NoTitle);
25?????????????//?Set?our?view?from?the?"main"?layout?resource
26?????????????SetContentView(Resource.Layout.Maintabs);
27?
28?????????????this.mAIntent?=?new?Intent(this,?typeof?(AActivity));
29?????????????this.mBIntent?=?new?Intent(this,?typeof?(BActivity));
30?????????????this.mCIntent?=?new?Intent(this,?typeof?(CActivity));
31?????????????this.mDIntent?=?new?Intent(this,?typeof?(DActivity));
32?????????????this.mEIntent?=?new?Intent(this,?typeof?(EActivity));
33?
34?????????????((RadioButton)FindViewById(Resource.Id.radio_button0)).SetOnCheckedChangeListener(this);
35?????????????((RadioButton)FindViewById(Resource.Id.radio_button1)).SetOnCheckedChangeListener(this);
36?????????????((RadioButton)FindViewById(Resource.Id.radio_button2)).SetOnCheckedChangeListener(this);
37?????????????((RadioButton)FindViewById(Resource.Id.radio_button3)).SetOnCheckedChangeListener(this);
38?????????????((RadioButton)FindViewById(Resource.Id.radio_button4)).SetOnCheckedChangeListener(this);
39?
40?
41?????????????SetupIntent();
42?????????}
43?
44?????????public?void?OnCheckedChanged(CompoundButton?buttonView,?bool?isChecked)
45?????????{
46?????????????if?(isChecked)
47?????????????{
48?????????????????switch?(buttonView.Id)
49?????????????????{
50?????????????????????case?Resource.Id.radio_button0:
51?????????????????????????this.mTabHost.SetCurrentTabByTag("A_TAB");
52?????????????????????????break;
53?????????????????????case?Resource.Id.radio_button1:
54?????????????????????????this.mTabHost.SetCurrentTabByTag("B_TAB");
55?????????????????????????break;
56?????????????????????case?Resource.Id.radio_button2:
57?????????????????????????this.mTabHost.SetCurrentTabByTag("C_TAB");
58?????????????????????????break;
59?????????????????????case?Resource.Id.radio_button3:
60?????????????????????????this.mTabHost.SetCurrentTabByTag("D_TAB");
61?????????????????????????break;
62?????????????????????case?Resource.Id.radio_button4:
63?????????????????????????this.mTabHost.SetCurrentTabByTag("MORE_TAB");
64?????????????????????????break;
65?????????????????}
66?????????????}
67?????????}
68?
69?????????private?void?SetupIntent()
70?????????{
71?????????????this.mTabHost?=?this.TabHost;
72?????????????TabHost?localTabHost?=?this.mTabHost;
73?
74?????????????localTabHost.AddTab(BuildTabSpec("A_TAB",?Resource.String.main_home,Resource.Drawable.icon_1_n,?this.mAIntent));
75?
76?????????????localTabHost.AddTab(BuildTabSpec("B_TAB",?Resource.String.main_news,
77?????????????????Resource.Drawable.icon_2_n,?this.mBIntent));
78?
79?????????????localTabHost.AddTab(BuildTabSpec("C_TAB",
80?????????????????Resource.String.main_manage_date,?Resource.Drawable.icon_3_n,
81?????????????????this.mCIntent));
82?
83?????????????localTabHost.AddTab(BuildTabSpec("D_TAB",?Resource.String.main_friends,
84?????????????????Resource.Drawable.icon_4_n,?this.mDIntent));
85?
86?????????????localTabHost.AddTab(BuildTabSpec("MORE_TAB",?Resource.String.more,
87?????????????????Resource.Drawable.icon_5_n,?this.mEIntent));
88?
89?????????}
90?
91?????????private?TabHost.TabSpec?BuildTabSpec(string?tag,?int?resLabel,?int?resIcon,?Intent?content)
92?????????{
93?????????????return?this.mTabHost.NewTabSpec(tag).SetIndicator(GetString(resLabel),
94?????????????????Resources.GetDrawable(resIcon)).SetContent(content);
95?????????}
96?????}

97?}?

?注意紅色部分,與自動創建的不同.

創建其他?Activity.cs /?AActivity BActivity CActivity DActivity EActivity

?using?System;

using?Android.App;
using?Android.Content;
using?Android.Runtime;
using?Android.Views;
using?Android.Widget;
using?Android.OS;

namespace?MyAppTest
{
????[Activity(Label?=?"AActivity",?Icon?=?"@drawable/icon",?Theme?=?"@android:style/Theme.DeviceDefault.NoActionBar")]
????public?class?AActivity?:?Activity
????{
????????protected?override?void?OnCreate(Bundle?bundle)
????????{
????????????base.OnCreate(bundle);
????????????RequestWindowFeature(WindowFeatures.NoTitle);

????????????TextView?tv?=?new?TextView(this);
????????????tv.SetText("This?is?A?Activity!",?TextView.BufferType.Normal);
????????????tv.Gravity?=?GravityFlags.Center;
????????????SetContentView(tv);
????????}
????}
}

涉及到的資源這里沒有列出,請參考源碼.

?4.真機調試

代碼寫完了,該編譯以下了, 看看是否有錯, 編譯順利通過, 插上真機(我這里有個買車險送的 200塊的 Android平板準備扔了的,試了下很真可以調試程序),

要VS直接調試的話,需要VS是以管理員方式啟動的, 查上設備后你會看到:

設備顯示在調試的位置,直接F5就可以了. 什么?無圖無真相?

?運行效果:

5.打包?

調試完了,該打包發布了是吧?

?等等打包(Export Android Package(.apk))怎么是灰色的?

別著急,大微軟肯定不會忽悠你.

原來你需要把編譯模式選擇為 Release,默認的Debug是不能打包的. 看這里. 看這里.

打包完成:

?你問我卡不卡呀? 我這不到200塊錢的白送的pad都可以流暢的跑.

結束了,該上碼了:

?本文源碼下載:

?http://files.cnblogs.com/files/crazybird/MyAppTest.zip

出處：http://www.cnblogs.com/crazybird/articles/5373223.html

轉載于:https://www.cnblogs.com/mq0036/p/7265928.html

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