Android: FAB now changes color to match the visible platform.

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/activities/MainActivity.java

@@ -5,6 +5,7 @@
 import android.content.Intent;
 import android.content.Loader;
 import android.content.SharedPreferences;
+import android.content.res.ColorStateList;
 import android.database.Cursor;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
@@ -19,6 +20,9 @@
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
+import android.view.animation.AccelerateInterpolator;
+import android.view.animation.Interpolator;
+import android.view.animation.OvershootInterpolator;
 
 import org.dolphinemu.dolphinemu.NativeLibrary;
 import org.dolphinemu.dolphinemu.R;
@@ -48,6 +52,10 @@ public final class MainActivity extends AppCompatActivity implements LoaderManag
 
 	private ViewPager mViewPager;
 	private PlatformPagerAdapter mPlatformPagerAdapter;
+	private FloatingActionButton mButtonAddDirectory;
+
+	private static Interpolator mHideInterpolator = new AccelerateInterpolator();
+	private static Interpolator mShowInterpolator = new OvershootInterpolator();
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState)
@@ -74,8 +82,8 @@ protected void onCreate(Bundle savedInstanceState)
 		tabLayout.setupWithViewPager(mViewPager);
 
 		// Set up the FAB.
-		FloatingActionButton buttonAddDirectory = (FloatingActionButton) findViewById(R.id.button_add_directory);
-		buttonAddDirectory.setOnClickListener(new View.OnClickListener()
+		mButtonAddDirectory = (FloatingActionButton) findViewById(R.id.button_add_directory);
+		mButtonAddDirectory.setOnClickListener(new View.OnClickListener()
 		{
 			@Override
 			public void onClick(View view)
@@ -87,6 +95,41 @@ public void onClick(View view)
 			}
 		});
 
+		mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener()
+		{
+			@Override
+			public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels)
+			{
+			}
+
+			@Override
+			public void onPageScrollStateChanged(int state)
+			{
+			}
+
+			@Override
+			public void onPageSelected(int position)
+			{
+				Log.i("DolphinEmu", "[MainActivity] Page selected: " + position);
+
+				switch (position)
+				{
+					case Game.PLATFORM_GC:
+						changeFabColor(R.color.fab_gamecube);
+						break;
+
+					case Game.PLATFORM_WII:
+						changeFabColor(R.color.fab_wii);
+						break;
+
+					case Game.PLATFORM_WII_WARE:
+						changeFabColor(R.color.fab_wiiware);
+						break;
+				}
+			}
+
+		});
+
 		// Stuff in this block only happens when this activity is newly created (i.e. not a rotation)
 		if (savedInstanceState == null)
 		{
@@ -105,6 +148,34 @@ public void onClick(View view)
 		}
 	}
 
+	private void changeFabColor(int colorResourceId)
+	{
+		final ColorStateList tint = getResources().getColorStateList(colorResourceId);
+
+		// Hide the button.
+		mButtonAddDirectory.animate()
+				.withLayer()
+				.setDuration(100)
+				.setInterpolator(mHideInterpolator)
+				.scaleX(0.0f)
+				.scaleY(0.0f)
+				.withEndAction(new Runnable()
+				{
+					@Override
+					public void run()
+					{
+						// Change the button's color, then show it again.
+						mButtonAddDirectory.setBackgroundTintList(tint);
+						mButtonAddDirectory.animate()
+								.withLayer()
+								.setDuration(150)
+								.setInterpolator(mShowInterpolator)
+								.scaleX(1.0f)
+								.scaleY(1.0f);
+					}
+				});
+	}
+
 	/**
 	 * Callback from AddDirectoryActivity. Applies any changes necessary to the GameGridActivity.
 	 *

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/fragments/PlatformGamesFragment.java

@@ -7,6 +7,7 @@
 import android.database.Cursor;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
+import android.support.v7.widget.DefaultItemAnimator;
 import android.support.v7.widget.GridLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.util.Log;
@@ -53,12 +54,13 @@ public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle sa
 		RecyclerView recyclerView = (RecyclerView) rootView.findViewById(R.id.grid_games);
 
 		// Specifying the LayoutManager determines how the RecyclerView arranges views.
-
 		RecyclerView.LayoutManager layoutManager = new GridLayoutManager(getActivity(),
 				getResources().getInteger(R.integer.game_grid_columns));
-		recyclerView.setLayoutManager(layoutManager);
 
+		recyclerView.setLayoutManager(layoutManager);
 		recyclerView.addItemDecoration(new GameAdapter.SpacesItemDecoration(8));
+		recyclerView.setItemAnimator(new DefaultItemAnimator());
+		recyclerView.setHasFixedSize(true);
 
 		// Create an adapter that will relate the dataset to the views on-screen. +1 because of LOADER_ID_ALL
 		getLoaderManager().initLoader(mPlatform, null,

Source/Android/app/src/main/res/color/fab_gamecube.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="@color/dolphin_accent_gamecube"/>
+</selector>

Source/Android/app/src/main/res/color/fab_wii.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="@color/dolphin_accent_wii"/>
+</selector>

Source/Android/app/src/main/res/color/fab_wiiware.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="@color/dolphin_accent_wiiware"/>
+</selector>

Source/Android/app/src/main/res/layout/activity_main.xml

@@ -43,6 +43,7 @@
         android:layout_margin="32dp"
         android:src="@drawable/ic_add"
         app:borderWidth="0dp"
+        app:backgroundTint="@color/fab_gamecube"
         app:rippleColor="?android:colorPrimaryDark"
         app:layout_anchor="@+id/pager_platforms"
         app:layout_anchorGravity="bottom|right|end"/>

Source/Android/app/src/main/res/layout/fragment_grid.xml

@@ -11,5 +11,8 @@
         android:layout_height="match_parent"
         android:layout_marginLeft="@dimen/activity_horizontal_margin"
         android:layout_marginRight="@dimen/activity_horizontal_margin"
-        tools:listitem="@layout/grid_card_game"/>
+        android:paddingTop="8dp"
+        android:paddingBottom="8dp"
+        android:clipToPadding="false"
+        tools:listitem="@layout/card_game"/>
 </FrameLayout>