v0.7.4b: restructured initialization logic into new android module

A lot of cleanup is needed for this, but everything works

android/.gitignore

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+#LibGDX native dependancies
+libgdx.so

android/build.gradle

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+/*
+ * Pixel Dungeon
+ * Copyright (C) 2012-2015 Oleg Dolya
+ *
+ * Shattered Pixel Dungeon
+ * Copyright (C) 2014-2019 Evan Debenham
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion appAndroidCompileSDK
+
+    defaultConfig {
+        manifestPlaceholders = [appName:appName]
+        applicationId appPackageName
+
+        versionCode appVersionCode
+        versionName appVersionName
+
+        //noinspection MinSdkTooLow
+        minSdkVersion appAndroidMinSDK
+        targetSdkVersion appAndroidTargetSDK
+
+        resConfigs "en_US", "cs", "tr", "ca", "ko", "pl", "it",
+                "eo", "ru", "zh_CN", "de", "fr", "es", "pt", "fi", "hu", "in"
+    }
+
+    buildTypes {
+        debug {
+            applicationIdSuffix ".indev"
+            versionNameSuffix '-INDEV'
+        }
+        release {
+
+            //These lines enable R8, which is a code shrinker/optimizer/obfuscator.
+            //This makes release APKs smaller and more efficient, but also makes debugging trickier
+            //as the information produced in stack traces must be de-obfuscated.
+            //See here: https://developer.android.com/studio/build/shrink-code#decode-stack-trace
+            shrinkResources true
+            minifyEnabled true
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+
+    sourceSets {
+        main {
+            jniLibs.srcDirs = ['libs']
+        }
+    }
+}
+
+configurations { natives }
+
+dependencies {
+    implementation project(':core')
+
+    implementation "com.badlogicgames.gdx:gdx-backend-android:$gdxVersion"
+    natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-armeabi"
+    natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-armeabi-v7a"
+    natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-x86"
+    natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-arm64-v8a"
+    natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-x86_64"
+    implementation "com.badlogicgames.gdx:gdx-controllers:$gdxVersion"
+    implementation "com.badlogicgames.gdx:gdx-controllers-android:$gdxVersion"
+}
+
+// called every time gradle gets executed, takes the native dependencies of
+// the natives configuration, and extracts them to the proper libs/ folders
+// so they get packed with the APK.
+task copyAndroidNatives() {
+    file("libs/armeabi/").mkdirs()
+    file("libs/armeabi-v7a/").mkdirs()
+    file("libs/arm64-v8a/").mkdirs()
+    file("libs/x86_64/").mkdirs()
+    file("libs/x86/").mkdirs()
+
+    configurations.natives.files.each { jar ->
+        def outputDir = null
+        if(jar.name.endsWith("natives-arm64-v8a.jar")) outputDir = file("libs/arm64-v8a")
+        if(jar.name.endsWith("natives-armeabi-v7a.jar")) outputDir = file("libs/armeabi-v7a")
+        if(jar.name.endsWith("natives-armeabi.jar")) outputDir = file("libs/armeabi")
+        if(jar.name.endsWith("natives-x86_64.jar")) outputDir = file("libs/x86_64")
+        if(jar.name.endsWith("natives-x86.jar")) outputDir = file("libs/x86")
+        if(outputDir != null) {
+            copy {
+                from zipTree(jar)
+                into outputDir
+                include "*.so"
+            }
+        }
+    }
+}

android/proguard-rules.pro

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+# retain these to support class references for the bundling and translation systems
+-keepnames class com.shatteredpixel.** { *; }
+-keepnames class com.watabou.** { *; }
+
+# retained to support meaningful stack traces
+# note that the mapping file must be referenced in order to make sense of line numbers
+# mapping file can be found in core/build/outputs/mapping after running a release build
+-keepattributes SourceFile,LineNumberTable
+
+-dontwarn android.support.**
+-dontwarn com.badlogic.gdx.backends.android.AndroidFragmentApplication
+-dontwarn com.badlogic.gdx.utils.GdxBuild
+-dontwarn com.badlogic.gdx.physics.box2d.utils.Box2DBuild
+-dontwarn com.badlogic.gdx.jnigen.BuildTarget*
+
+-keepclassmembers class com.badlogic.gdx.backends.android.AndroidInput* {
+   <init>(com.badlogic.gdx.Application, android.content.Context, java.lang.Object, com.badlogic.gdx.backends.android.AndroidApplicationConfiguration);
+}
+
+-keepclassmembers class com.badlogic.gdx.physics.box2d.World {
+   boolean contactFilter(long, long);
+   void    beginContact(long);
+   void    endContact(long);
+   void    preSolve(long, long);
+   void    postSolve(long, long);
+   boolean reportFixture(long);
+   float   reportRayFixture(long, float, float, float, float, float);
+}

android/src/debug/res/mipmap-anydpi-v26/ic_launcher.xml

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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="@mipmap/ic_launcher_background"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>

android/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+	package="com.shatteredpixel.shatteredpixeldungeon.android"
+	android:installLocation="auto">
+	
+	<uses-feature
+		android:glEsVersion="0x00020000"/>
+
+	<!-- Note that the game doesn't truly support small screen resolutions,
+		it instead forces downscaling to work on these displays.-->
+	<supports-screens
+		android:smallScreens="true"
+		android:normalScreens="true"
+		android:largeScreens="true"
+		android:xlargeScreens="true"/>
+
+	<application
+		android:icon="@mipmap/ic_launcher"
+		android:label="${appName}"
+		android:theme="@android:style/Theme.Black.NoTitleBar"
+		android:resizeableActivity="true"
+		android:allowBackup="true"
+		android:fullBackupOnly="true"
+		android:backupAgent=".AndroidBackupHandler">
+		<activity
+			android:label="${appName}"
+			android:name=".AndroidLauncher"
+			android:screenOrientation="nosensor"
+			android:configChanges="keyboard|keyboardHidden|orientation">
+			<intent-filter >
+				<action android:name="android.intent.action.MAIN" />
+				<category android:name="android.intent.category.LAUNCHER" />
+			</intent-filter>
+		</activity>
+
+	</application>
+
+</manifest>