diff --git a/.classpath b/.classpath
index 1457e3c35..3b8e883e6 100644
--- a/.classpath
+++ b/.classpath
@@ -5,5 +5,6 @@
+
diff --git a/lib/android-support-v4.jar b/lib/android-support-v4.jar
new file mode 100644
index 000000000..1780ad3d5
Binary files /dev/null and b/lib/android-support-v4.jar differ
diff --git a/src/org/nativescript/widgets/TabItemSpec.java b/src/org/nativescript/widgets/TabItemSpec.java
new file mode 100644
index 000000000..dc6881f71
--- /dev/null
+++ b/src/org/nativescript/widgets/TabItemSpec.java
@@ -0,0 +1,9 @@
+package org.nativescript.widgets;
+
+import android.graphics.drawable.Drawable;
+
+public class TabItemSpec {
+ public String title;
+ public int iconId;
+ public Drawable iconDrawable;
+}
\ No newline at end of file
diff --git a/src/org/nativescript/widgets/TabLayout.java b/src/org/nativescript/widgets/TabLayout.java
new file mode 100644
index 000000000..12afcdc38
--- /dev/null
+++ b/src/org/nativescript/widgets/TabLayout.java
@@ -0,0 +1,362 @@
+/*
+ * 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 org.nativescript.widgets;
+
+import android.content.Context;
+import android.graphics.Typeface;
+import android.support.v4.view.PagerAdapter;
+import android.support.v4.view.ViewPager;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+import android.util.SparseArray;
+import android.util.TypedValue;
+import android.view.Gravity;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.HorizontalScrollView;
+import android.widget.ImageView;
+import android.widget.ImageView.ScaleType;
+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.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ */
+public class TabLayout 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 static final int TEXT_MAX_WIDHT = 180;
+ private static final int SMALL_MIN_HEIGHT = 48;
+ private static final int LARGE_MIN_HEIGHT = 72;
+
+ private int mTitleOffset;
+
+ private boolean mDistributeEvenly = true;
+
+ private TabItemSpec[] mTabItems;
+ private ViewPager mViewPager;
+ private SparseArray mContentDescriptions = new SparseArray();
+ private ViewPager.OnPageChangeListener mViewPagerPageChangeListener;
+
+ private final TabStrip mTabStrip;
+
+ public TabLayout(Context context) {
+ this(context, null);
+ }
+
+ public TabLayout(Context context, AttributeSet attrs) {
+ this(context, attrs, 0);
+ }
+
+ public TabLayout(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 TabStrip(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 TabLayout} 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;
+ }
+
+ /**
+ * 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) {
+ this.setItems(null, viewPager);
+ }
+
+ public void setItems(TabItemSpec[] items, ViewPager viewPager) {
+ mTabStrip.removeAllViews();
+
+ mViewPager = viewPager;
+ mTabItems = items;
+ if (viewPager != null) {
+ viewPager.addOnPageChangeListener(new InternalViewPagerListener());
+ populateTabStrip();
+ }
+ }
+
+ /**
+ * Updates the ui of an item at specified index
+ */
+ public void updateItemAt(int position, TabItemSpec tabItem) {
+ LinearLayout ll = (LinearLayout)mTabStrip.getChildAt(position);
+ ImageView imgView = (ImageView)ll.getChildAt(0);
+ TextView textView = (TextView)ll.getChildAt(1);
+ this.setupItem(ll, textView, imgView, tabItem);
+ }
+
+ /**
+ * Create a default view to be used for tabs.
+ */
+ protected View createDefaultTabView(Context context, TabItemSpec tabItem) {
+ float density = getResources().getDisplayMetrics().density;
+ int padding = (int) (TAB_VIEW_PADDING_DIPS * density);
+
+ LinearLayout ll = new LinearLayout(context);
+ ll.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.MATCH_PARENT));
+ ll.setGravity(Gravity.CENTER);
+ ll.setOrientation(LinearLayout.VERTICAL);
+ TypedValue outValue = new TypedValue();
+ getContext().getTheme().resolveAttribute(android.R.attr.selectableItemBackground, outValue, true);
+ ll.setBackgroundResource(outValue.resourceId);
+
+ ImageView imgView = new ImageView(context);
+ imgView.setScaleType(ScaleType.FIT_CENTER);
+ LinearLayout.LayoutParams imgLP = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
+ imgLP.gravity = Gravity.CENTER;
+ imgView.setLayoutParams(imgLP);
+
+ TextView textView = new TextView(context);
+ textView.setGravity(Gravity.CENTER);
+ textView.setMaxWidth((int) (TEXT_MAX_WIDHT * density));
+ textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, TAB_VIEW_TEXT_SIZE_SP);
+ textView.setTypeface(Typeface.DEFAULT_BOLD);
+ textView.setEllipsize(TextUtils.TruncateAt.END);
+ textView.setAllCaps(true);
+ textView.setMaxLines(2);
+ textView.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
+ textView.setPadding(padding, 0, padding, 0);
+
+ this.setupItem(ll, textView, imgView, tabItem);
+
+ ll.addView(imgView);
+ ll.addView(textView);
+ return ll;
+ }
+
+ private void setupItem(LinearLayout ll, TextView textView,ImageView imgView, TabItemSpec tabItem){
+ float density = getResources().getDisplayMetrics().density;
+
+ if (tabItem.iconId != 0) {
+ imgView.setImageResource(tabItem.iconId);
+ imgView.setVisibility(VISIBLE);
+ } else if (tabItem.iconDrawable != null) {
+ imgView.setImageDrawable(tabItem.iconDrawable);
+ imgView.setVisibility(VISIBLE);
+ } else {
+ imgView.setVisibility(GONE);
+ }
+
+ if (tabItem.title != null && !tabItem.title.isEmpty()) {
+ textView.setText(tabItem.title);
+ textView.setVisibility(VISIBLE);
+ } else {
+ textView.setVisibility(GONE);
+ }
+
+ if (imgView.getVisibility() == VISIBLE && textView.getVisibility() == VISIBLE) {
+ ll.setMinimumHeight((int) (LARGE_MIN_HEIGHT * density));
+ } else {
+ ll.setMinimumHeight((int) (SMALL_MIN_HEIGHT * density));
+ }
+
+ if (mDistributeEvenly) {
+ LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) ll.getLayoutParams();
+ lp.width = 0;
+ lp.weight = 1;
+ }
+ }
+
+ 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;
+
+ TabItemSpec tabItem;
+ if (this.mTabItems != null && this.mTabItems.length > i) {
+ tabItem = this.mTabItems[i];
+ } else {
+ tabItem = new TabItemSpec();
+ tabItem.title = adapter.getPageTitle(i).toString();
+ }
+
+ tabView = createDefaultTabView(getContext(), tabItem);
+
+ 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;
+ }
+ }
+ }
+ }
+}
\ No newline at end of file
diff --git a/src/org/nativescript/widgets/TabStrip.java b/src/org/nativescript/widgets/TabStrip.java
new file mode 100644
index 000000000..c400bda3c
--- /dev/null
+++ b/src/org/nativescript/widgets/TabStrip.java
@@ -0,0 +1,168 @@
+/*
+ * 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 org.nativescript.widgets;
+
+
+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 TabStrip 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 final int mDefaultBottomBorderColor;
+
+ private int mSelectedPosition;
+ private float mSelectionOffset;
+
+ private TabLayout.TabColorizer mCustomTabColorizer;
+ private final SimpleTabColorizer mDefaultTabColorizer;
+
+ TabStrip(Context context) {
+ this(context, null);
+ }
+
+ TabStrip(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;
+
+ mDefaultBottomBorderColor = 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(mDefaultBottomBorderColor);
+
+ mSelectedIndicatorThickness = (int) (SELECTED_INDICATOR_THICKNESS_DIPS * density);
+ mSelectedIndicatorPaint = new Paint();
+ }
+
+ void setCustomTabColorizer(TabLayout.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 TabLayout.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 TabLayout.TabColorizer {
+ private int[] mIndicatorColors;
+
+ @Override
+ public final int getIndicatorColor(int position) {
+ return mIndicatorColors[position % mIndicatorColors.length];
+ }
+
+ void setIndicatorColors(int... colors) {
+ mIndicatorColors = colors;
+ }
+ }
+}