android: create bare application

src/android/app/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="org.citra_emu.citra">
+    <uses-feature
+        android:name="android.hardware.touchscreen"
+        android:required="false"/>
+
+    <uses-feature
+        android:name="android.hardware.gamepad"
+        android:required="false"/>
+
+    <uses-feature android:glEsVersion="0x00030001" />
+
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+
+    <application
+        android:name="org.citra_emu.citra.CitraApplication"
+        android:label="Citra Emulator"
+        android:icon="@drawable/ic_citra"
+        android:allowBackup="true"
+        android:supportsRtl="true"
+        android:isGame="true"
+        android:banner="@drawable/ic_citra">
+
+        <activity
+            android:name=".ui.main.MainActivity"
+            android:theme="@style/CitraBase">
+
+            <!-- This intentfilter marks this Activity as the one that gets launched from Home screen. -->
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <action android:name="android.intent.action.VIEW"/>
+
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

src/android/app/src/main/java/org/citra_emu/citra/CitraApplication.java

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+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+package org.citra_emu.citra;
+
+import android.app.Application;
+
+public class CitraApplication extends Application {}

src/android/app/src/main/java/org/citra_emu/citra/ui/main/MainActivity.java

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+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+package org.citra_emu.citra.ui.main;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+
+import org.citra_emu.citra.R;
+
+public final class MainActivity extends AppCompatActivity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+    }
+}

src/android/app/src/main/res/layout/activity_main.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"
+                                                 android:id="@+id/coordinator_main"
+                                                 android:layout_width="match_parent"
+                                                 android:layout_height="match_parent">
+
+    <android.support.design.widget.AppBarLayout
+        android:id="@+id/appbar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
+
+        <android.support.v7.widget.Toolbar
+            android:id="@+id/toolbar_main"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
+            app:layout_scrollFlags="scroll|enterAlways"/>
+
+        <android.support.design.widget.TabLayout
+            android:id="@+id/tabs_platforms"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            app:tabTextAppearance="@style/MyCustomTextAppearance"
+            app:tabMode="fixed"
+            app:tabGravity="fill"/>
+
+    </android.support.design.widget.AppBarLayout>
+
+    <android.support.v4.view.ViewPager
+        android:id="@+id/pager_platforms"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
+
+    <android.support.design.widget.FloatingActionButton
+        android:id="@+id/button_add_directory"
+        style="@style/CitraBase"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="16dp"
+        android:src="@drawable/ic_add"
+        app:backgroundTint="@color/citra_orange_dark"
+        app:borderWidth="0dp"
+        app:layout_anchor="@+id/pager_platforms"
+        app:layout_anchorGravity="bottom|right|end"
+        app:rippleColor="?android:colorPrimaryDark" />
+
+</android.support.design.widget.CoordinatorLayout>