Merge branch 'material-tabs'

AndroidManifest.xml

@@ -42,7 +42,6 @@ THE SOFTWARE.
 		<activity
 			android:name="LibraryActivity"
 			android:theme="@style/Library"
-			android:uiOptions="splitActionBarWhenNarrow"
 			android:launchMode="singleTask">
 			<intent-filter>
 				<action android:name="android.intent.action.MAIN" />

res/color/tab_text_selector.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_selected="true" android:color="@android:color/primary_text_dark" />
+    <item android:color="@android:color/primary_text_dark" android:alpha="0.65" />
+</selector>

res/drawable/tab_indicator.xml

@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2008 The Android Open Source Project
-
-     Licensed under the Apache License, Version 2.0 (the "License");
-     you may not use this file except in compliance with the License.
-     You may obtain a copy of the License at
-  
-          http://www.apache.org/licenses/LICENSE-2.0
-  
-     Unless required by applicable law or agreed to in writing, software
-     distributed under the License is distributed on an "AS IS" BASIS,
-     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-     See the License for the specific language governing permissions and
-     limitations under the License.
--->
-
-<selector xmlns:android="http://schemas.android.com/apk/res/android">
-    <!-- Non focused states -->
-    <item android:state_focused="false" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/tab_unselected" />
-    <item android:state_focused="false" android:state_selected="true" android:state_pressed="false" android:drawable="@drawable/tab_selected" />
-
-    <!-- Focused states -->
-    <item android:state_focused="true" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/tab_focus" />
-    <item android:state_focused="true" android:state_selected="true" android:state_pressed="false" android:drawable="@drawable/tab_focus" />
-
-    <!-- Pressed -->
-    <item android:state_pressed="true" android:drawable="@drawable/tab_focus" />
-</selector>

res/layout/library_content.xml

@@ -27,13 +27,12 @@ THE SOFTWARE.
 	android:layout_width="fill_parent"
 	android:layout_height="fill_parent">
 
-	<View
-		android:id="@+id/actionbar_elevation_hack"
-		android:layout_width="fill_parent"
-		android:layout_height="1px"
-		android:background="?float_color"
-		android:elevation="4dp"
-	/>
+	<android.support.iosched.tabs.VanillaTabLayout
+		android:id="@+id/sliding_tabs"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:background="@color/tabs_background" />
+
 	<android.support.v4.view.ViewPager
 		android:id="@+id/pager"
 		android:layout_width="fill_parent"

res/values-v21/colors.xml

@@ -21,6 +21,10 @@
 	<!-- showqueue info -->
 	<color name="now_playing_marker">@color/vanillaAccent</color>
 
+	<!-- library tabs -->
+	<color name="tabs_background">@color/vanillaPrimary</color>
+	<color name="tabs_active_indicator">@android:color/primary_text_dark</color>
+
 	<!-- themed overlay colors for full playback activity -->
 	<color name="overlay_background_light">#ffeeeeee</color>
 	<color name="overlay_foreground_light">#f000</color>

res/values-v21/theme.xml

@@ -40,8 +40,6 @@ Copyright (C) 2015 Adrian Ulrich <adrian@blinkenlights.ch>
 
 	<style name="Library" parent="VanillaBase">
 		<item name="android:actionBarStyle">@style/Universal.LibraryActionBar</item>
-		<item name="android:actionBarTabStyle">@style/Universal.LibraryActionBarTabView</item>
-		<item name="android:actionBarTabTextStyle">@style/Universal.LibraryActionBarTabText</item>
 	</style>
 
 	<!-- universal styles -->
@@ -53,17 +51,6 @@ Copyright (C) 2015 Adrian Ulrich <adrian@blinkenlights.ch>
 	<style name="Universal.LibraryActionBar" parent="android:Widget.Material.ActionBar">
 		<item name="android:displayOptions"></item>
 		<item name="android:background">@color/vanillaPrimary</item>
-		<item name="android:backgroundStacked">@color/vanillaPrimary</item>
-	</style>
-
-	<style name="Universal.LibraryActionBarTabText" parent="android:Widget.Material.ActionBar.TabText">
-		<item name="android:singleLine">true</item>
-		<item name="android:textSize">11.5sp</item>
-		<item name="android:textColor">@color/material_grey_300</item>
-	</style>
-
-	<style name="Universal.LibraryActionBarTabView" parent="android:Widget.Material.ActionBar.TabView">
-		<item name="android:background">@drawable/tab_indicator</item>
 	</style>
 
 
@@ -87,8 +74,6 @@ Copyright (C) 2015 Adrian Ulrich <adrian@blinkenlights.ch>
 
 	<style name="Dark.Library" parent="Dark.VanillaBase">
 		<item name="android:actionBarStyle">@style/Universal.LibraryActionBar</item>
-		<item name="android:actionBarTabStyle">@style/Universal.LibraryActionBarTabView</item>
-		<item name="android:actionBarTabTextStyle">@style/Universal.LibraryActionBarTabText</item>
 	</style>
 
 

res/values/colors.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+	<!-- now-playing screen buttons tint -->
+	<color name="controls_active">@android:color/holo_blue_dark</color>
+	<color name="controls_normal">#fff5f5f5</color>
+	<!-- showqueue info -->
+	<color name="now_playing_marker">@android:color/holo_blue_dark</color>
+	<!-- library tabs -->
+	<color name="tabs_background">#ff1e1e1e</color>
+	<color name="tabs_active_indicator">@android:color/holo_blue_dark</color>
+</resources>

res/values/theme.xml

@@ -21,13 +21,6 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 -->
 <resources>
-	<!-- now-playing screen buttons tint -->
-	<color name="controls_active">@android:color/holo_blue_dark</color>
-	<color name="controls_normal">#fff5f5f5</color>
-
-	<!-- showqueue info -->
-	<color name="now_playing_marker">@android:color/holo_blue_dark</color>
-
 	<!-- styles -->
 	<style name="Dialog" parent="android:Theme.Holo.Dialog" />
 	<style name="DialogMinWidth" parent="android:Theme.Holo.Dialog.MinWidth" />
@@ -54,14 +47,9 @@ THE SOFTWARE.
 	</style>
 	<style name="Library" parent="VanillaBase">
 		<item name="android:actionBarStyle">@style/LibraryActionBar</item>
-		<item name="android:actionBarTabTextStyle">@style/LibraryActionBarTabText</item>
 	</style>
 	<style name="LibraryActionBar" parent="android:Widget.Holo.ActionBar">
 		<item name="android:displayOptions"></item>
 	</style>
-	<style name="LibraryActionBarTabText" parent="android:Widget.Holo.ActionBar.TabText">
-		<item name="android:singleLine">true</item>
-		<item name="android:textSize">11.5sp</item>
-	</style>
 
 </resources>

src/android/support/iosched/tabs/SlidingTabLayout.java

@@ -0,0 +1,322 @@
+// imported from https://raw.githubusercontent.com/google/iosched/2531cbdbe27e5795eb78bf47d27e8c1be494aad4/android/src/main/java/com/google/samples/apps/iosched/ui/widget/SlidingTabLayout.java
+/*
+ * Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.support.iosched.tabs;
+
+import android.content.Context;
+import android.graphics.Typeface;
+import android.support.v4.view.PagerAdapter;
+import android.support.v4.view.ViewPager;
+import android.util.AttributeSet;
+import android.util.SparseArray;
+import android.util.TypedValue;
+import android.view.Gravity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.HorizontalScrollView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+/**
+ * To be used with ViewPager to provide a tab indicator component which give constant feedback as to
+ * the user's scroll progress.
+ * <p>
+ * To use the component, simply add it to your view hierarchy. Then in your
+ * {@link android.app.Activity} or {@link android.support.v4.app.Fragment} call
+ * {@link #setViewPager(ViewPager)} providing it the ViewPager this layout is being used for.
+ * <p>
+ * The colors can be customized in two ways. The first and simplest is to provide an array of colors
+ * via {@link #setSelectedIndicatorColors(int...)}. The
+ * alternative is via the {@link TabColorizer} interface which provides you complete control over
+ * which color is used for any individual position.
+ * <p>
+ * The views used as tabs can be customized by calling {@link #setCustomTabView(int, int)},
+ * providing the layout ID of your custom layout.
+ */
+public class SlidingTabLayout extends HorizontalScrollView {
+    /**
+     * Allows complete control over the colors drawn in the tab layout. Set with
+     * {@link #setCustomTabColorizer(TabColorizer)}.
+     */
+    public interface TabColorizer {
+
+        /**
+         * @return return the color of the indicator used when {@code position} is selected.
+         */
+        int getIndicatorColor(int position);
+
+    }
+
+    private static final int TITLE_OFFSET_DIPS = 24;
+    private static final int TAB_VIEW_PADDING_DIPS = 16;
+    private static final int TAB_VIEW_TEXT_SIZE_SP = 12;
+
+    private int mTitleOffset;
+
+    private int mTabViewLayoutId;
+    private int mTabViewTextViewId;
+    private boolean mDistributeEvenly;
+
+    private ViewPager mViewPager;
+    private SparseArray<String> mContentDescriptions = new SparseArray<String>();
+    private ViewPager.OnPageChangeListener mViewPagerPageChangeListener;
+
+    private final SlidingTabStrip mTabStrip;
+
+    public SlidingTabLayout(Context context) {
+        this(context, null);
+    }
+
+    public SlidingTabLayout(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public SlidingTabLayout(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+
+        // Disable the Scroll Bar
+        setHorizontalScrollBarEnabled(false);
+        // Make sure that the Tab Strips fills this View
+        setFillViewport(true);
+
+        mTitleOffset = (int) (TITLE_OFFSET_DIPS * getResources().getDisplayMetrics().density);
+
+        mTabStrip = new SlidingTabStrip(context);
+        addView(mTabStrip, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
+    }
+
+    /**
+     * Set the custom {@link TabColorizer} to be used.
+     *
+     * If you only require simple custmisation then you can use
+     * {@link #setSelectedIndicatorColors(int...)} to achieve
+     * similar effects.
+     */
+    public void setCustomTabColorizer(TabColorizer tabColorizer) {
+        mTabStrip.setCustomTabColorizer(tabColorizer);
+    }
+
+    public void setDistributeEvenly(boolean distributeEvenly) {
+        mDistributeEvenly = distributeEvenly;
+    }
+
+    /**
+     * Sets the colors to be used for indicating the selected tab. These colors are treated as a
+     * circular array. Providing one color will mean that all tabs are indicated with the same color.
+     */
+    public void setSelectedIndicatorColors(int... colors) {
+        mTabStrip.setSelectedIndicatorColors(colors);
+    }
+
+    /**
+     * Set the {@link ViewPager.OnPageChangeListener}. When using {@link SlidingTabLayout} you are
+     * required to set any {@link ViewPager.OnPageChangeListener} through this method. This is so
+     * that the layout can update it's scroll position correctly.
+     *
+     * @see ViewPager#setOnPageChangeListener(ViewPager.OnPageChangeListener)
+     */
+    public void setOnPageChangeListener(ViewPager.OnPageChangeListener listener) {
+        mViewPagerPageChangeListener = listener;
+    }
+
+    /**
+     * Set the custom layout to be inflated for the tab views.
+     *
+     * @param layoutResId Layout id to be inflated
+     * @param textViewId id of the {@link TextView} in the inflated view
+     */
+    public void setCustomTabView(int layoutResId, int textViewId) {
+        mTabViewLayoutId = layoutResId;
+        mTabViewTextViewId = textViewId;
+    }
+
+    /**
+     * Sets the associated view pager. Note that the assumption here is that the pager content
+     * (number of tabs and tab titles) does not change after this call has been made.
+     */
+    public void setViewPager(ViewPager viewPager) {
+        mTabStrip.removeAllViews();
+
+        mViewPager = viewPager;
+        if (viewPager != null) {
+            viewPager.setOnPageChangeListener(new InternalViewPagerListener());
+            populateTabStrip();
+        }
+    }
+
+    /**
+     * Create a default view to be used for tabs. This is called if a custom tab view is not set via
+     * {@link #setCustomTabView(int, int)}.
+     */
+    protected TextView createDefaultTabView(Context context) {
+        TextView textView = new TextView(context);
+        textView.setGravity(Gravity.CENTER);
+        textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, TAB_VIEW_TEXT_SIZE_SP);
+        textView.setTypeface(Typeface.DEFAULT_BOLD);
+        textView.setLayoutParams(new LinearLayout.LayoutParams(
+                ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
+
+        TypedValue outValue = new TypedValue();
+        getContext().getTheme().resolveAttribute(android.R.attr.selectableItemBackground,
+                outValue, true);
+        textView.setBackgroundResource(outValue.resourceId);
+        textView.setAllCaps(true);
+
+        int padding = (int) (TAB_VIEW_PADDING_DIPS * getResources().getDisplayMetrics().density);
+        textView.setPadding(padding, padding, padding, padding);
+
+        return textView;
+    }
+
+    private void populateTabStrip() {
+        final PagerAdapter adapter = mViewPager.getAdapter();
+        final View.OnClickListener tabClickListener = new TabClickListener();
+
+        for (int i = 0; i < adapter.getCount(); i++) {
+            View tabView = null;
+            TextView tabTitleView = null;
+
+            if (mTabViewLayoutId != 0) {
+                // If there is a custom tab view layout id set, try and inflate it
+                tabView = LayoutInflater.from(getContext()).inflate(mTabViewLayoutId, mTabStrip,
+                        false);
+                tabTitleView = (TextView) tabView.findViewById(mTabViewTextViewId);
+            }
+
+            if (tabView == null) {
+                tabView = createDefaultTabView(getContext());
+            }
+
+            if (tabTitleView == null && TextView.class.isInstance(tabView)) {
+                tabTitleView = (TextView) tabView;
+            }
+
+            if (mDistributeEvenly) {
+                LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) tabView.getLayoutParams();
+                lp.width = 0;
+                lp.weight = 1;
+            }
+
+            tabTitleView.setText(adapter.getPageTitle(i));
+            tabView.setOnClickListener(tabClickListener);
+            String desc = mContentDescriptions.get(i, null);
+            if (desc != null) {
+                tabView.setContentDescription(desc);
+            }
+
+            mTabStrip.addView(tabView);
+            if (i == mViewPager.getCurrentItem()) {
+                tabView.setSelected(true);
+            }
+        }
+    }
+
+    public void setContentDescription(int i, String desc) {
+        mContentDescriptions.put(i, desc);
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+
+        if (mViewPager != null) {
+            scrollToTab(mViewPager.getCurrentItem(), 0);
+        }
+    }
+
+    private void scrollToTab(int tabIndex, int positionOffset) {
+        final int tabStripChildCount = mTabStrip.getChildCount();
+        if (tabStripChildCount == 0 || tabIndex < 0 || tabIndex >= tabStripChildCount) {
+            return;
+        }
+
+        View selectedChild = mTabStrip.getChildAt(tabIndex);
+        if (selectedChild != null) {
+            int targetScrollX = selectedChild.getLeft() + positionOffset;
+
+            if (tabIndex > 0 || positionOffset > 0) {
+                // If we're not at the first child and are mid-scroll, make sure we obey the offset
+                targetScrollX -= mTitleOffset;
+            }
+
+            scrollTo(targetScrollX, 0);
+        }
+    }
+
+    private class InternalViewPagerListener implements ViewPager.OnPageChangeListener {
+        private int mScrollState;
+
+        @Override
+        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+            int tabStripChildCount = mTabStrip.getChildCount();
+            if ((tabStripChildCount == 0) || (position < 0) || (position >= tabStripChildCount)) {
+                return;
+            }
+
+            mTabStrip.onViewPagerPageChanged(position, positionOffset);
+
+            View selectedTitle = mTabStrip.getChildAt(position);
+            int extraOffset = (selectedTitle != null)
+                    ? (int) (positionOffset * selectedTitle.getWidth())
+                    : 0;
+            scrollToTab(position, extraOffset);
+
+            if (mViewPagerPageChangeListener != null) {
+                mViewPagerPageChangeListener.onPageScrolled(position, positionOffset,
+                        positionOffsetPixels);
+            }
+        }
+
+        @Override
+        public void onPageScrollStateChanged(int state) {
+            mScrollState = state;
+
+            if (mViewPagerPageChangeListener != null) {
+                mViewPagerPageChangeListener.onPageScrollStateChanged(state);
+            }
+        }
+
+        @Override
+        public void onPageSelected(int position) {
+            if (mScrollState == ViewPager.SCROLL_STATE_IDLE) {
+                mTabStrip.onViewPagerPageChanged(position, 0f);
+                scrollToTab(position, 0);
+            }
+            for (int i = 0; i < mTabStrip.getChildCount(); i++) {
+                mTabStrip.getChildAt(i).setSelected(position == i);
+            }
+            if (mViewPagerPageChangeListener != null) {
+                mViewPagerPageChangeListener.onPageSelected(position);
+            }
+        }
+
+    }
+
+    private class TabClickListener implements View.OnClickListener {
+        @Override
+        public void onClick(View v) {
+            for (int i = 0; i < mTabStrip.getChildCount(); i++) {
+                if (v == mTabStrip.getChildAt(i)) {
+                    mViewPager.setCurrentItem(i);
+                    return;
+                }
+            }
+        }
+    }
+
+}

src/android/support/iosched/tabs/SlidingTabStrip.java

@@ -0,0 +1,166 @@
+// imported from https://raw.githubusercontent.com/google/iosched/2531cbdbe27e5795eb78bf47d27e8c1be494aad4/android/src/main/java/com/google/samples/apps/iosched/ui/widget/SlidingTabStrip.java
+/*
+ * Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.support.iosched.tabs;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.util.AttributeSet;
+import android.util.TypedValue;
+import android.view.View;
+import android.widget.LinearLayout;
+
+class SlidingTabStrip extends LinearLayout {
+
+    private static final int DEFAULT_BOTTOM_BORDER_THICKNESS_DIPS = 0;
+    private static final byte DEFAULT_BOTTOM_BORDER_COLOR_ALPHA = 0x26;
+    private static final int SELECTED_INDICATOR_THICKNESS_DIPS = 3;
+    private static final int DEFAULT_SELECTED_INDICATOR_COLOR = 0xFF33B5E5;
+
+    private final int mBottomBorderThickness;
+    private final Paint mBottomBorderPaint;
+
+    private final int mSelectedIndicatorThickness;
+    private final Paint mSelectedIndicatorPaint;
+
+    private int mSelectedPosition;
+    private float mSelectionOffset;
+
+    private SlidingTabLayout.TabColorizer mCustomTabColorizer;
+    private final SimpleTabColorizer mDefaultTabColorizer;
+
+    SlidingTabStrip(Context context) {
+        this(context, null);
+    }
+
+    SlidingTabStrip(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        setWillNotDraw(false);
+
+        final float density = getResources().getDisplayMetrics().density;
+
+        TypedValue outValue = new TypedValue();
+        context.getTheme().resolveAttribute(android.R.attr.colorForeground, outValue, true);
+        final int themeForegroundColor =  outValue.data;
+
+        int defaultBottomBorderColor = setColorAlpha(themeForegroundColor,
+                DEFAULT_BOTTOM_BORDER_COLOR_ALPHA);
+
+        mDefaultTabColorizer = new SimpleTabColorizer();
+        mDefaultTabColorizer.setIndicatorColors(DEFAULT_SELECTED_INDICATOR_COLOR);
+
+        mBottomBorderThickness = (int) (DEFAULT_BOTTOM_BORDER_THICKNESS_DIPS * density);
+        mBottomBorderPaint = new Paint();
+        mBottomBorderPaint.setColor(defaultBottomBorderColor);
+
+        mSelectedIndicatorThickness = (int) (SELECTED_INDICATOR_THICKNESS_DIPS * density);
+        mSelectedIndicatorPaint = new Paint();
+    }
+
+    void setCustomTabColorizer(SlidingTabLayout.TabColorizer customTabColorizer) {
+        mCustomTabColorizer = customTabColorizer;
+        invalidate();
+    }
+
+    void setSelectedIndicatorColors(int... colors) {
+        // Make sure that the custom colorizer is removed
+        mCustomTabColorizer = null;
+        mDefaultTabColorizer.setIndicatorColors(colors);
+        invalidate();
+    }
+
+    void onViewPagerPageChanged(int position, float positionOffset) {
+        mSelectedPosition = position;
+        mSelectionOffset = positionOffset;
+        invalidate();
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        final int height = getHeight();
+        final int childCount = getChildCount();
+        final SlidingTabLayout.TabColorizer tabColorizer = mCustomTabColorizer != null
+                ? mCustomTabColorizer
+                : mDefaultTabColorizer;
+
+        // Thick colored underline below the current selection
+        if (childCount > 0) {
+            View selectedTitle = getChildAt(mSelectedPosition);
+            int left = selectedTitle.getLeft();
+            int right = selectedTitle.getRight();
+            int color = tabColorizer.getIndicatorColor(mSelectedPosition);
+
+            if (mSelectionOffset > 0f && mSelectedPosition < (getChildCount() - 1)) {
+                int nextColor = tabColorizer.getIndicatorColor(mSelectedPosition + 1);
+                if (color != nextColor) {
+                    color = blendColors(nextColor, color, mSelectionOffset);
+                }
+
+                // Draw the selection partway between the tabs
+                View nextTitle = getChildAt(mSelectedPosition + 1);
+                left = (int) (mSelectionOffset * nextTitle.getLeft() +
+                        (1.0f - mSelectionOffset) * left);
+                right = (int) (mSelectionOffset * nextTitle.getRight() +
+                        (1.0f - mSelectionOffset) * right);
+            }
+
+            mSelectedIndicatorPaint.setColor(color);
+
+            canvas.drawRect(left, height - mSelectedIndicatorThickness, right,
+                    height, mSelectedIndicatorPaint);
+        }
+
+        // Thin underline along the entire bottom edge
+        canvas.drawRect(0, height - mBottomBorderThickness, getWidth(), height, mBottomBorderPaint);
+    }
+
+    /**
+     * Set the alpha value of the {@code color} to be the given {@code alpha} value.
+     */
+    private static int setColorAlpha(int color, byte alpha) {
+        return Color.argb(alpha, Color.red(color), Color.green(color), Color.blue(color));
+    }
+
+    /**
+     * Blend {@code color1} and {@code color2} using the given ratio.
+     *
+     * @param ratio of which to blend. 1.0 will return {@code color1}, 0.5 will give an even blend,
+     *              0.0 will return {@code color2}.
+     */
+    private static int blendColors(int color1, int color2, float ratio) {
+        final float inverseRation = 1f - ratio;
+        float r = (Color.red(color1) * ratio) + (Color.red(color2) * inverseRation);
+        float g = (Color.green(color1) * ratio) + (Color.green(color2) * inverseRation);
+        float b = (Color.blue(color1) * ratio) + (Color.blue(color2) * inverseRation);
+        return Color.rgb((int) r, (int) g, (int) b);
+    }
+
+    private static class SimpleTabColorizer implements SlidingTabLayout.TabColorizer {
+        private int[] mIndicatorColors;
+
+        @Override
+        public final int getIndicatorColor(int position) {
+            return mIndicatorColors[position % mIndicatorColors.length];
+        }
+
+        void setIndicatorColors(int... colors) {
+            mIndicatorColors = colors;
+        }
+    }
+}

src/android/support/iosched/tabs/VanillaTabLayout.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2015-2016 Adrian Ulrich <adrian@blinkenlights.ch>
+ *
+ * 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/>. 
+ */
+
+package android.support.iosched.tabs;
+
+import android.app.ActionBar;
+import android.content.Context;
+import android.util.AttributeSet;
+import android.widget.TextView;
+
+import android.os.Build;
+
+/**
+ * Simple wrapper for SlidingTabLayout which takes
+ * care of setting sane per-platform defaults
+ */
+public class VanillaTabLayout extends SlidingTabLayout {
+
+	public VanillaTabLayout(Context context) {
+		this(context, null);
+	}
+
+	public VanillaTabLayout(Context context, AttributeSet attrs) {
+		this(context, attrs, 0);
+	}
+
+	public VanillaTabLayout(Context context, AttributeSet attrs, int defStyle) {
+		super(context, attrs, defStyle);
+		setSelectedIndicatorColors(context.getResources().getColor(ch.blinkenlights.android.vanilla.R.color.tabs_active_indicator));
+		setDistributeEvenly(true);
+	}
+
+	/**
+	 * Overrides the default text color
+	 */
+	@Override
+	protected TextView createDefaultTabView(Context context) {
+		TextView view = super.createDefaultTabView(context);
+		view.setTextColor(getResources().getColorStateList(ch.blinkenlights.android.vanilla.R.color.tab_text_selector));
+		view.setTextSize(14);
+		return view;
+	}
+
+	/**
+	 * Borrow elevation of given action bar
+	 *
+	 * @param ab The active action bar
+	 */
+	public void inheritElevation(ActionBar ab) {
+		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP)
+			return; // noop on earlier releases
+
+		float elevation = ab.getElevation();
+		ab.setElevation(0.0f);
+		setElevation(elevation);
+	}
+
+
+
+}

src/ch/blinkenlights/android/vanilla/CompatHoneycomb.java

@@ -1,93 +0,0 @@
-/*
- * Copyright (C) 2012 Christopher Eby <kreed@kreed.org>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-package ch.blinkenlights.android.vanilla;
-
-import android.annotation.TargetApi;
-import android.app.ActionBar;
-import android.app.ActionBar.Tab;
-import android.app.Activity;
-import android.app.FragmentTransaction;
-import android.net.Uri;
-import android.provider.MediaStore;
-import android.view.KeyEvent;
-import android.view.MenuItem;
-import android.view.View;
-import android.widget.ListView;
-
-/**
- * Framework methods only in Honeycomb or above go here.
- */
-@TargetApi(11)
-public class CompatHoneycomb {
-	/**
-	 * Add ActionBar tabs for LibraryActivity.
-	 *
-	 * @param activity The activity to add to.
-	 */
-	public static void addActionBarTabs(final LibraryActivity activity)
-	{
-		ActionBar.TabListener listener = new ActionBar.TabListener() {
-			private final LibraryActivity mActivity = activity;
-
-			@Override
-			public void onTabReselected(Tab tab, FragmentTransaction ft)
-			{
-			}
-
-			@Override
-			public void onTabSelected(Tab tab, FragmentTransaction ft)
-			{
-				mActivity.mViewPager.setCurrentItem(tab.getPosition());
-			}
-
-			@Override
-			public void onTabUnselected(Tab tab, FragmentTransaction ft)
-			{
-			}
-		};
-
-		ActionBar ab = activity.getActionBar();
-		ab.removeAllTabs();
-		int[] order = activity.mPagerAdapter.mTabOrder;
-		int[] titles = LibraryPagerAdapter.TITLES;
-		for (int i = 0, n = activity.mPagerAdapter.getCount(); i != n; ++i) {
-			ab.addTab(ab.newTab().setText(titles[order[i]]).setTabListener(listener));
-		}
-		ab.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
-	}
-
-	/**
-	 * Select the ActionBar tab at the given position.
-	 *
-	 * @param activity The activity that owns the ActionBar.
-	 * @param position The tab's position.
-	 */
-	public static void selectTab(Activity activity, int position)
-	{
-		ActionBar ab = activity.getActionBar();
-		if (position < ab.getTabCount()) {
-			ab.selectTab(ab.getTabAt(position));
-		}
-	}
-
-}

src/ch/blinkenlights/android/vanilla/FileSystemAdapter.java

@@ -201,7 +201,10 @@ public class FileSystemAdapter
 			holder = new ViewHolder();
 			holder.text = (TextView)view.findViewById(R.id.text);
 			holder.divider = (View)view.findViewById(R.id.divider);
+			holder.cover = (LazyCoverView)view.findViewById(R.id.cover);
 			holder.arrow = (ImageView)view.findViewById(R.id.arrow);
+
+			holder.cover.setImageDrawable(mFolderIcon);
 			holder.arrow.setOnClickListener(this);
 			view.setTag(holder);
 		} else {
@@ -215,7 +218,7 @@ public class FileSystemAdapter
 		holder.text.setText(file.getName());
 		holder.arrow.setVisibility(isDirectory ? View.VISIBLE : View.GONE);
 		holder.divider.setVisibility(isDirectory ? View.VISIBLE : View.GONE);
-		holder.text.setCompoundDrawablesWithIntrinsicBounds(isDirectory ? mFolderIcon : null, null, null, null);
+		holder.cover.setVisibility(isDirectory ? View.VISIBLE : View.GONE);
 		return view;
 	}
 

src/ch/blinkenlights/android/vanilla/FilebrowserStartAdapter.java

@@ -55,8 +55,13 @@ public class FilebrowserStartAdapter
 			holder = new ViewHolder();
 			holder.text = (TextView)view.findViewById(R.id.text);
 			holder.divider = view.findViewById(R.id.divider);
+			holder.cover = (LazyCoverView)view.findViewById(R.id.cover);
+
 			holder.arrow = (ImageView)view.findViewById(R.id.arrow);
+
+			holder.cover.setImageDrawable(mFolderIcon);
 			holder.text.setOnClickListener(this);
+			holder.cover.setVisibility(View.VISIBLE);
 			view.setTag(holder);
 		} else {
 			view = convertView;
@@ -66,9 +71,6 @@ public class FilebrowserStartAdapter
 		String label = getItem(pos);
 		holder.id = pos;
 		holder.text.setText(label);
-		holder.divider.setVisibility(View.GONE);
-		holder.arrow.setVisibility(View.GONE);
-		holder.text.setCompoundDrawablesWithIntrinsicBounds(mFolderIcon, null, null, null);
 		return view;
 	}
 

src/ch/blinkenlights/android/vanilla/LibraryActivity.java

@@ -40,6 +40,7 @@ import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.provider.MediaStore;
+import android.support.iosched.tabs.VanillaTabLayout;
 import android.support.v4.view.ViewPager;
 import android.text.Editable;
 import android.text.TextUtils;
@@ -137,7 +138,7 @@ public class LibraryActivity
 
 	private HorizontalScrollView mLimiterScroller;
 	private ViewGroup mLimiterViews;
-
+	private VanillaTabLayout mVanillaTabLayout;
 	/**
 	 * The action to execute when a row is tapped.
 	 */
@@ -184,7 +185,6 @@ public class LibraryActivity
 		mViewPager = pager;
 
 		SharedPreferences settings = PlaybackService.getSettings(this);
-		pager.setOnPageChangeListener(pagerAdapter);
 
 		View controls = getLayoutInflater().inflate(R.layout.actionbar_controls, null);
 		mTitle = (TextView)controls.findViewById(R.id.title);
@@ -201,6 +201,9 @@ public class LibraryActivity
 			mPermissionRequest.setVisibility(View.VISIBLE);
 		}
 
+		mVanillaTabLayout = (VanillaTabLayout)findViewById(R.id.sliding_tabs);
+		mVanillaTabLayout.inheritElevation(getActionBar());
+		mVanillaTabLayout.setOnPageChangeListener(pagerAdapter);
 
 		loadTabOrder();
 		int page = settings.getInt(PrefKeys.LIBRARY_PAGE, PrefDefaults.LIBRARY_PAGE);
@@ -235,7 +238,8 @@ public class LibraryActivity
 	private void loadTabOrder()
 	{
 		if (mPagerAdapter.loadTabOrder()) {
-			CompatHoneycomb.addActionBarTabs(this);
+			// Reinitializes all tabs
+			mVanillaTabLayout.setViewPager(mViewPager);
 		}
 	}
 
@@ -1008,7 +1012,6 @@ public class LibraryActivity
 		mCurrentAdapter = adapter;
 		mLastActedId = LibraryAdapter.INVALID_ID;
 		updateLimiterViews();
-		CompatHoneycomb.selectTab(this, position);
 		if (adapter != null && (adapter.getLimiter() == null || adapter.getMediaType() == MediaUtils.TYPE_FILE)) {
 			// Save current page so it is opened on next startup. Don't save if
 			// the page was expanded to, as the expanded page isn't the starting

src/ch/blinkenlights/android/vanilla/LibraryPagerAdapter.java

@@ -812,7 +812,7 @@ public class LibraryPagerAdapter
 		// onPageSelected and setPrimaryItem are called in similar cases, and it
 		// would be nice to use just one of them, but each has caveats:
 		// - onPageSelected isn't called when the ViewPager is first
-		//   initialized
+		//   initialized if there is no scrolling to do
 		// - setPrimaryItem isn't called until scrolling is complete, which
 		//   makes tab bar and limiter updates look bad
 		// So we use both.