Android Lifecycle

This commit is contained in:
Luke Malpass
2018-08-24 17:09:38 +01:00
parent 5d8f44e2ae
commit 076d0e94d4
33 changed files with 6699 additions and 0 deletions

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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<ProductVersion>8.0.30703</ProductVersion>
<SchemaVersion>2.0</SchemaVersion>
<ProjectGuid>{3BC0AC7E-3B3B-4D3F-9CC0-B2BDECC460A6}</ProjectGuid>
<ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
<TemplateGuid>{84dd83c5-0fe3-4294-9419-09e7c8ba324f}</TemplateGuid>
<OutputType>Library</OutputType>
<AppDesignerFolder>Properties</AppDesignerFolder>
<RootNamespace>AndroidLifecycle</RootNamespace>
<AssemblyName>AndroidLifecycle</AssemblyName>
<FileAlignment>512</FileAlignment>
<AndroidApplication>True</AndroidApplication>
<AndroidResgenFile>Resources\Resource.Designer.cs</AndroidResgenFile>
<AndroidResgenClass>Resource</AndroidResgenClass>
<GenerateSerializationAssemblies>Off</GenerateSerializationAssemblies>
<AndroidUseLatestPlatformSdk>false</AndroidUseLatestPlatformSdk>
<TargetFrameworkVersion>v7.1</TargetFrameworkVersion>
<AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
<MonoAndroidResourcePrefix>Resources</MonoAndroidResourcePrefix>
<MonoAndroidAssetsPrefix>Assets</MonoAndroidAssetsPrefix>
<AndroidHttpClientHandlerType>Xamarin.Android.Net.AndroidClientHandler</AndroidHttpClientHandlerType>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<DebugSymbols>True</DebugSymbols>
<DebugType>portable</DebugType>
<Optimize>False</Optimize>
<OutputPath>bin\Debug\</OutputPath>
<DefineConstants>DEBUG;TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
<AndroidUseSharedRuntime>True</AndroidUseSharedRuntime>
<AndroidLinkMode>None</AndroidLinkMode>
<EmbedAssembliesIntoApk>False</EmbedAssembliesIntoApk>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
<DebugType>PdbOnly</DebugType>
<DebugSymbols>True</DebugSymbols>
<Optimize>True</Optimize>
<OutputPath>bin\Release\</OutputPath>
<DefineConstants>TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
<AndroidManagedSymbols>true</AndroidManagedSymbols>
<AndroidUseSharedRuntime>False</AndroidUseSharedRuntime>
<AndroidLinkMode>SdkOnly</AndroidLinkMode>
<EmbedAssembliesIntoApk>True</EmbedAssembliesIntoApk>
</PropertyGroup>
<ItemGroup>
<Reference Include="System" />
<Reference Include="System.Xml" />
<Reference Include="System.Core" />
<Reference Include="Mono.Android" />
</ItemGroup>
<ItemGroup>
<Compile Include="MainActivity.cs" />
<Compile Include="Resources\Resource.Designer.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
</ItemGroup>
<ItemGroup>
<None Include="Resources\AboutResources.txt" />
<None Include="Properties\AndroidManifest.xml" />
<None Include="Assets\AboutAssets.txt" />
</ItemGroup>
<ItemGroup>
<AndroidResource Include="Resources\layout\activity_main.axml">
<SubType>Designer</SubType>
</AndroidResource>
<AndroidResource Include="Resources\layout\content_main.axml">
<SubType>Designer</SubType>
</AndroidResource>
<AndroidResource Include="Resources\values\colors.xml" />
<AndroidResource Include="Resources\values\dimens.xml" />
<AndroidResource Include="Resources\values\ic_launcher_background.xml" />
<AndroidResource Include="Resources\values\strings.xml" />
<AndroidResource Include="Resources\values\styles.xml" />
<AndroidResource Include="Resources\menu\menu_main.xml" />
<AndroidResource Include="Resources\mipmap-anydpi-v26\ic_launcher.xml" />
<AndroidResource Include="Resources\mipmap-anydpi-v26\ic_launcher_round.xml" />
<AndroidResource Include="Resources\mipmap-hdpi\ic_launcher.png" />
<AndroidResource Include="Resources\mipmap-hdpi\ic_launcher_foreground.png" />
<AndroidResource Include="Resources\mipmap-hdpi\ic_launcher_round.png" />
<AndroidResource Include="Resources\mipmap-mdpi\ic_launcher.png" />
<AndroidResource Include="Resources\mipmap-mdpi\ic_launcher_foreground.png" />
<AndroidResource Include="Resources\mipmap-mdpi\ic_launcher_round.png" />
<AndroidResource Include="Resources\mipmap-xhdpi\ic_launcher.png" />
<AndroidResource Include="Resources\mipmap-xhdpi\ic_launcher_foreground.png" />
<AndroidResource Include="Resources\mipmap-xhdpi\ic_launcher_round.png" />
<AndroidResource Include="Resources\mipmap-xxhdpi\ic_launcher.png" />
<AndroidResource Include="Resources\mipmap-xxhdpi\ic_launcher_foreground.png" />
<AndroidResource Include="Resources\mipmap-xxhdpi\ic_launcher_round.png" />
<AndroidResource Include="Resources\mipmap-xxxhdpi\ic_launcher.png" />
<AndroidResource Include="Resources\mipmap-xxxhdpi\ic_launcher_foreground.png" />
<AndroidResource Include="Resources\mipmap-xxxhdpi\ic_launcher_round.png" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="Xamarin.Android.Support.Design" Version="25.4.0.2" />
</ItemGroup>
<Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
<!-- To modify your build process, add your task inside one of the targets below and uncomment it.
Other similar extension points exist, see Microsoft.Common.targets.
<Target Name="BeforeBuild">
</Target>
<Target Name="AfterBuild">
</Target>
-->
</Project>

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Any raw assets you want to be deployed with your application can be placed in
this directory (and child directories) and given a Build Action of "AndroidAsset".
These files will be deployed with you package and will be accessible using Android's
AssetManager, like this:
public class ReadAsset : Activity
{
protected override void OnCreate (Bundle bundle)
{
base.OnCreate (bundle);
InputStream input = Assets.Open ("my_asset.txt");
}
}
Additionally, some Android functions will automatically load asset files:
Typeface tf = Typeface.CreateFromAsset (Context.Assets, "fonts/samplefont.ttf");

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using Android.App;
using Android.OS;
using Android.Support.Design.Widget;
using Android.Support.V7.App;
using Android.Views;
using System;
namespace AndroidLifecycle
{
[Activity(Label = "@string/app_name", Theme = "@style/AppTheme.NoActionBar", MainLauncher = true)]
public class MainActivity : AppCompatActivity
{
//
// A good reference starting point for the actibity life cycle is here
// https://developer.android.com/reference/android/app/Activity
//
// Events on application creation
// =========================================
// ~~~~~~~~~~~~~~~~ OnCreate
// ~~~~~~~~~~~~~~~~ OnStart
// ~~~~~~~~~~~~~~~~ OnPostCreate
// ~~~~~~~~~~~~~~~~ OnStateNotSaved
// ~~~~~~~~~~~~~~~~ OnResume
// ~~~~~~~~~~~~~~~~ OnPostResume
//
//
// Events on back button press
// =========================================
// ~~~~~~~~~~~~~~~~ Finish
// ~~~~~~~~~~~~~~~~ OnPause
// ~~~~~~~~~~~~~~~~ OnStop
// ~~~~~~~~~~~~~~~~ OnDestroy
//
//
// Events on re-open after back button
// =========================================
// ~~~~~~~~~~~~~~~~ OnCreate
// ~~~~~~~~~~~~~~~~ OnStart
// ~~~~~~~~~~~~~~~~ OnPostCreate
// ~~~~~~~~~~~~~~~~ OnStateNotSaved
// ~~~~~~~~~~~~~~~~ OnResume
// ~~~~~~~~~~~~~~~~ OnPostResume
//
//
// Events on Home / Menu button press
// =========================================
// ~~~~~~~~~~~~~~~~ OnUserLeaveHint
// ~~~~~~~~~~~~~~~~ OnPause
// ~~~~~~~~~~~~~~~~ OnSaveInstanceState
// ~~~~~~~~~~~~~~~~ OnStop
//
//
// Events on re-open after Home / Menu
// =========================================
// ~~~~~~~~~~~~~~~~ OnStateNotSaved
// ~~~~~~~~~~~~~~~~ OnRestart
// ~~~~~~~~~~~~~~~~ OnStart
// ~~~~~~~~~~~~~~~~ OnResume
// ~~~~~~~~~~~~~~~~ OnPostResume
//
//
// Instant Kill
// =========================================
// No guaranteed calls
//
//
// DONT USE DISPOSE or JavaFinalize (Slide 44 onwards)
// Use OnDestroy instead
// https://www.slideshare.net/Xamarin/advanced-memory-management-on-ios-and-android-mark-probst-and-rodrigo-kumpera
//
protected override void OnCreate(Bundle savedInstanceState)
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnCreate");
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.activity_main);
Android.Support.V7.Widget.Toolbar toolbar = FindViewById<Android.Support.V7.Widget.Toolbar>(Resource.Id.toolbar);
SetSupportActionBar(toolbar);
FloatingActionButton fab = FindViewById<FloatingActionButton>(Resource.Id.fab);
fab.Click += FabOnClick;
}
public override void OnCreate(Bundle savedInstanceState, PersistableBundle persistentState)
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnCreate 2");
base.OnCreate(savedInstanceState, persistentState);
}
protected override void OnStart()
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnStart");
base.OnStart();
}
protected override void OnPostCreate(Bundle savedInstanceState)
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnPostCreate");
base.OnPostCreate(savedInstanceState);
}
public override void OnPostCreate(Bundle savedInstanceState, PersistableBundle persistentState)
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnPostCreate 2");
base.OnPostCreate(savedInstanceState, persistentState);
}
public override void OnStateNotSaved()
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnStateNotSaved");
base.OnStateNotSaved();
}
protected override void OnResume()
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnResume");
base.OnResume();
}
protected override void OnPostResume()
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnPostResume");
base.OnPostResume();
}
protected override void OnUserLeaveHint()
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnUserLeaveHint");
base.OnUserLeaveHint();
}
protected override void OnPause()
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnPause");
base.OnPause();
}
protected override void OnSaveInstanceState(Bundle outState)
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnSaveInstanceState");
base.OnSaveInstanceState(outState);
}
public override void OnSaveInstanceState(Bundle outState, PersistableBundle outPersistentState)
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnSaveInstanceState 2");
base.OnSaveInstanceState(outState, outPersistentState);
}
protected override void OnStop()
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnStop");
base.OnStop();
}
protected override void OnRestart()
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnRestart");
base.OnRestart();
}
protected override void OnDestroy()
{
Console.WriteLine("~~~~~~~~~~~~~~~~ OnDestroy");
base.OnDestroy();
}
public override void Finish()
{
Console.WriteLine("~~~~~~~~~~~~~~~~ Finish");
base.Finish();
}
#region App Specific Code
public override bool OnCreateOptionsMenu(IMenu menu)
{
MenuInflater.Inflate(Resource.Menu.menu_main, menu);
return true;
}
public override bool OnOptionsItemSelected(IMenuItem item)
{
int id = item.ItemId;
if (id == Resource.Id.action_settings)
{
return true;
}
return base.OnOptionsItemSelected(item);
}
private void FabOnClick(object sender, EventArgs eventArgs)
{
View view = (View) sender;
Snackbar.Make(view, "Replace with your own action", Snackbar.LengthLong)
.SetAction("Action", (Android.Views.View.IOnClickListener)null).Show();
}
#endregion
}
}

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="AndroidLifecycle.AndroidLifecycle" android:installLocation="auto">
<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="25" />
<application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"></application>
</manifest>

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using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using Android.App;
// General Information about an assembly is controlled through the following
// set of attributes. Change these attribute values to modify the information
// associated with an assembly.
[assembly: AssemblyTitle("AndroidLifecycle")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("AndroidLifecycle")]
[assembly: AssemblyCopyright("Copyright © 2018")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]
[assembly: ComVisible(false)]
// Version information for an assembly consists of the following four values:
//
// Major Version
// Minor Version
// Build Number
// Revision
//
// You can specify all the values or you can default the Build and Revision Numbers
// by using the '*' as shown below:
// [assembly: AssemblyVersion("1.0.*")]
[assembly: AssemblyVersion("1.0.0.0")]
[assembly: AssemblyFileVersion("1.0.0.0")]

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Images, layout descriptions, binary blobs and string dictionaries can be included
in your application as resource files. Various Android APIs are designed to
operate on the resource IDs instead of dealing with images, strings or binary blobs
directly.
For example, a sample Android app that contains a user interface layout (main.axml),
an internationalization string table (strings.xml) and some icons (drawable-XXX/icon.png)
would keep its resources in the "Resources" directory of the application:
Resources/
drawable/
icon.png
layout/
main.axml
values/
strings.xml
In order to get the build system to recognize Android resources, set the build action to
"AndroidResource". The native Android APIs do not operate directly with filenames, but
instead operate on resource IDs. When you compile an Android application that uses resources,
the build system will package the resources for distribution and generate a class called "R"
(this is an Android convention) that contains the tokens for each one of the resources
included. For example, for the above Resources layout, this is what the R class would expose:
public class R {
public class drawable {
public const int icon = 0x123;
}
public class layout {
public const int main = 0x456;
}
public class strings {
public const int first_string = 0xabc;
public const int second_string = 0xbcd;
}
}
You would then use R.drawable.icon to reference the drawable/icon.png file, or R.layout.main
to reference the layout/main.axml file, or R.strings.first_string to reference the first
string in the dictionary file values/strings.xml.

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<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_main" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
app:srcCompat="@android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>

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<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:showIn="@layout/activity_main">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Hello World!" />
</RelativeLayout>

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<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<item
android:id="@+id/action_settings"
android:orderInCategory="100"
android:title="@string/action_settings"
app:showAsAction="never" />
</menu>

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<?xml version="1.0" encoding="utf-8"?>
<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
<background android:drawable="@color/ic_launcher_background"/>
<foreground android:drawable="@mipmap/ic_launcher_foreground"/>
</adaptive-icon>

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<?xml version="1.0" encoding="utf-8"?>
<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
<background android:drawable="@color/ic_launcher_background"/>
<foreground android:drawable="@mipmap/ic_launcher_foreground"/>
</adaptive-icon>

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<resources>
<string name="app_name">AndroidLifecycle</string>
<string name="action_settings">Settings</string>
</resources>

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<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#2c3e50</color>
<color name="colorPrimaryDark">#1B3147</color>
<color name="colorAccent">#3498db</color>
</resources>

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<resources>
<dimen name="fab_margin">16dp</dimen>
</resources>

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<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="ic_launcher_background">#2C3E50</color>
</resources>

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<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
</resources>