Android Lifecycle
Luke Malpass
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Images, layout descriptions, binary blobs and string dictionaries can be included
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in your application as resource files. Various Android APIs are designed to
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operate on the resource IDs instead of dealing with images, strings or binary blobs
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directly.
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For example, a sample Android app that contains a user interface layout (main.axml),
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an internationalization string table (strings.xml) and some icons (drawable-XXX/icon.png)
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would keep its resources in the "Resources" directory of the application:
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Resources/
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drawable/
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icon.png
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layout/
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main.axml
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values/
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strings.xml
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In order to get the build system to recognize Android resources, set the build action to
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"AndroidResource". The native Android APIs do not operate directly with filenames, but
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instead operate on resource IDs. When you compile an Android application that uses resources,
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the build system will package the resources for distribution and generate a class called "R"
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(this is an Android convention) that contains the tokens for each one of the resources
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included. For example, for the above Resources layout, this is what the R class would expose:
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public class R {
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public class drawable {
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public const int icon = 0x123;
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}
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public class layout {
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public const int main = 0x456;
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}
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public class strings {
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public const int first_string = 0xabc;
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public const int second_string = 0xbcd;
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}
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}
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You would then use R.drawable.icon to reference the drawable/icon.png file, or R.layout.main
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to reference the layout/main.axml file, or R.strings.first_string to reference the first
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string in the dictionary file values/strings.xml.
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6154
Xamarin Android/Android Lifecycle/AndroidLifecycle/Resources/Resource.Designer.cs
generated
Normal file
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<?xml version="1.0" encoding="utf-8"?>
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<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent">
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<android.support.design.widget.AppBarLayout
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:theme="@style/AppTheme.AppBarOverlay">
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<android.support.v7.widget.Toolbar
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android:id="@+id/toolbar"
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android:layout_width="match_parent"
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android:layout_height="?attr/actionBarSize"
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android:background="?attr/colorPrimary"
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app:popupTheme="@style/AppTheme.PopupOverlay" />
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</android.support.design.widget.AppBarLayout>
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<include layout="@layout/content_main" />
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<android.support.design.widget.FloatingActionButton
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android:id="@+id/fab"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_gravity="bottom|end"
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android:layout_margin="@dimen/fab_margin"
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app:srcCompat="@android:drawable/ic_dialog_email" />
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</android.support.design.widget.CoordinatorLayout>
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<?xml version="1.0" encoding="utf-8"?>
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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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app:layout_behavior="@string/appbar_scrolling_view_behavior"
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tools:showIn="@layout/activity_main">
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||||
<TextView
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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||||
android:layout_centerInParent="true"
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android:text="Hello World!" />
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</RelativeLayout>
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<menu xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools">
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<item
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android:id="@+id/action_settings"
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android:orderInCategory="100"
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android:title="@string/action_settings"
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app:showAsAction="never" />
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</menu>
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<?xml version="1.0" encoding="utf-8"?>
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<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
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<background android:drawable="@color/ic_launcher_background"/>
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<foreground android:drawable="@mipmap/ic_launcher_foreground"/>
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</adaptive-icon>
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<?xml version="1.0" encoding="utf-8"?>
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||||
<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
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<background android:drawable="@color/ic_launcher_background"/>
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<foreground android:drawable="@mipmap/ic_launcher_foreground"/>
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</adaptive-icon>
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|
After Width: | Height: | Size: 1.6 KiB |
|
After Width: | Height: | Size: 1.4 KiB |
|
After Width: | Height: | Size: 3.5 KiB |
|
After Width: | Height: | Size: 1.3 KiB |
|
After Width: | Height: | Size: 958 B |
|
After Width: | Height: | Size: 2.4 KiB |
|
After Width: | Height: | Size: 2.3 KiB |
|
After Width: | Height: | Size: 2.0 KiB |
|
After Width: | Height: | Size: 4.7 KiB |
|
After Width: | Height: | Size: 3.8 KiB |
|
After Width: | Height: | Size: 3.3 KiB |
|
After Width: | Height: | Size: 7.8 KiB |
|
After Width: | Height: | Size: 4.9 KiB |
|
After Width: | Height: | Size: 4.8 KiB |
|
After Width: | Height: | Size: 11 KiB |
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||||
<resources>
|
||||
<string name="app_name">AndroidLifecycle</string>
|
||||
<string name="action_settings">Settings</string>
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||||
</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>
|
||||