package com.baobao.pagerslidingtabstrip;
 
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Typeface;
import android.os.Build;
import android.os.Parcel;
import android.os.Parcelable;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.widget.HorizontalScrollView;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.TextView;
 
import java.util.Locale;
 
 
 
 
 
public class PagerSlidingTabStrip extends HorizontalScrollView {
 
    public interface IconTabProvider {
        public int getPageIconResId(int position);
    }
 
    // @formatter:off
    private static final int[] ATTRS = new int[] { android.R.attr.textSize,
            android.R.attr.textColor };
    // @formatter:on
 
    private LinearLayout.LayoutParams defaultTabLayoutParams;
    private LinearLayout.LayoutParams expandedTabLayoutParams;
 
    private final PageListener pageListener = new PageListener();
    public OnPageChangeListener delegatePageListener;
 
    private LinearLayout tabsContainer;
    private ViewPager pager;
 
    private int tabCount;
 
    private int currentPosition = 0;
    private int selectedPosition = 0;
    private float currentPositionOffset = 0f;
 
    private Paint rectPaint;
    private Paint dividerPaint;
 
    private int indicatorColor = 0xFF666666;
    private int underlineColor = 0x1A000000;
    private int dividerColor = 0x1A000000;
 
    private boolean shouldExpand = false;
    private boolean textAllCaps = true;
 
    private int scrollOffset = 52;
    private int indicatorHeight = 8;
    private int underlineHeight = 2;
    private int dividerPadding = 12;
    private int tabPadding = 24;
    private int dividerWidth = 1;
 
    private int tabTextSize = 12;
    private int tabTextColor = 0xFF666666;
    private int selectedTabTextColor = 0xFF666666;
    private Typeface tabTypeface = null;
    private int tabTypefaceStyle = Typeface.NORMAL;
 
    private int lastScrollX = 0;
 
    private int tabBackgroundResId = R.drawable.background_tab;
 
    private Locale locale;
 
    public PagerSlidingTabStrip(Context context) {
        this(context, null);
    }
 
    public PagerSlidingTabStrip(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }
 
    public PagerSlidingTabStrip(Context context, AttributeSet attrs,
            int defStyle) {
        super(context, attrs, defStyle);
 
        setFillViewport(true);
        setWillNotDraw(false);
 
        tabsContainer = new LinearLayout(context);
        tabsContainer.setOrientation(LinearLayout.HORIZONTAL);
        tabsContainer.setLayoutParams(new LayoutParams(
                LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        addView(tabsContainer);
 
        DisplayMetrics dm = getResources().getDisplayMetrics();
 
        scrollOffset = (int) TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_DIP, scrollOffset, dm);
        indicatorHeight = (int) TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_DIP, indicatorHeight, dm);
        underlineHeight = (int) TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_DIP, underlineHeight, dm);
        dividerPadding = (int) TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_DIP, dividerPadding, dm);
        tabPadding = (int) TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_DIP, tabPadding, dm);
        dividerWidth = (int) TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_DIP, dividerWidth, dm);
        tabTextSize = (int) TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_SP, tabTextSize, dm);
 
        // get system attrs (android:textSize and android:textColor)
 
        TypedArray a = context.obtainStyledAttributes(attrs, ATTRS);
 
        tabTextSize = a.getDimensionPixelSize(0, tabTextSize);
        tabTextColor = a.getColor(1, tabTextColor);
 
        a.recycle();
 
        // get custom attrs
 
        a = context.obtainStyledAttributes(attrs,
                R.styleable.PagerSlidingTabStrip);
 
        indicatorColor = a.getColor(
                R.styleable.PagerSlidingTabStrip_pstsIndicatorColor,
                indicatorColor);
        underlineColor = a.getColor(
                R.styleable.PagerSlidingTabStrip_pstsUnderlineColor,
                underlineColor);
        dividerColor = a
                .getColor(R.styleable.PagerSlidingTabStrip_pstsDividerColor,
                        dividerColor);
        indicatorHeight = a.getDimensionPixelSize(
                R.styleable.PagerSlidingTabStrip_pstsIndicatorHeight,
                indicatorHeight);
        underlineHeight = a.getDimensionPixelSize(
                R.styleable.PagerSlidingTabStrip_pstsUnderlineHeight,
                underlineHeight);
        dividerPadding = a.getDimensionPixelSize(
                R.styleable.PagerSlidingTabStrip_pstsDividerPadding,
                dividerPadding);
        tabPadding = a.getDimensionPixelSize(
                R.styleable.PagerSlidingTabStrip_pstsTabPaddingLeftRight,
                tabPadding);
        tabBackgroundResId = a.getResourceId(
                R.styleable.PagerSlidingTabStrip_pstsTabBackground,
                tabBackgroundResId);
        shouldExpand = a
                .getBoolean(R.styleable.PagerSlidingTabStrip_pstsShouldExpand,
                        shouldExpand);
        scrollOffset = a
                .getDimensionPixelSize(
                        R.styleable.PagerSlidingTabStrip_pstsScrollOffset,
                        scrollOffset);
        textAllCaps = a.getBoolean(
                R.styleable.PagerSlidingTabStrip_pstsTextAllCaps, textAllCaps);
 
        a.recycle();
 
        rectPaint = new Paint();
        rectPaint.setAntiAlias(true);
        rectPaint.setStyle(Style.FILL);
 
        dividerPaint = new Paint();
        dividerPaint.setAntiAlias(true);
        dividerPaint.setStrokeWidth(dividerWidth);
 
        defaultTabLayoutParams = new LinearLayout.LayoutParams(
                LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
        expandedTabLayoutParams = new LinearLayout.LayoutParams(0,
                LayoutParams.MATCH_PARENT, 1.0f);
 
        if (locale == null) {
            locale = getResources().getConfiguration().locale;
        }
    }
 
    public void setViewPager(ViewPager pager) {
        this.pager = pager;
 
        if (pager.getAdapter() == null) {
            throw new IllegalStateException(
                    "ViewPager does not have adapter instance.");
        }
 
        pager.setOnPageChangeListener(pageListener);
 
        notifyDataSetChanged();
    }
 
    public void setOnPageChangeListener(OnPageChangeListener listener) {
        this.delegatePageListener = listener;
    }
 
    public void notifyDataSetChanged() {
 
        tabsContainer.removeAllViews();
 
        tabCount = pager.getAdapter().getCount();
 
        for (int i = 0; i < tabCount; i++) {
 
            if (pager.getAdapter() instanceof IconTabProvider) {
                addIconTab(i,
                        ((IconTabProvider) pager.getAdapter())
                                .getPageIconResId(i));
            } else {
                addTextTab(i, pager.getAdapter().getPageTitle(i).toString());
            }
 
        }
 
        updateTabStyles();
 
        getViewTreeObserver().addOnGlobalLayoutListener(
                new OnGlobalLayoutListener() {
 
                    @Override
                    public void onGlobalLayout() {
                        getViewTreeObserver()
                                .removeGlobalOnLayoutListener(this);
                        currentPosition = pager.getCurrentItem();
                        scrollToChild(currentPosition, 0);
                    }
                });
 
    }
 
    private void addTextTab(final int position, String title) {
 
        TextView tab = new TextView(getContext());
        tab.setText(title);
        tab.setGravity(Gravity.CENTER);
        tab.setSingleLine();
        addTab(position, tab);
    }
 
    private void addIconTab(final int position, int resId) {
 
        ImageButton tab = new ImageButton(getContext());
        tab.setImageResource(resId);
 
        addTab(position, tab);
 
    }
 
    private void addTab(final int position, View tab) {
        tab.setFocusable(true);
        tab.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                pager.setCurrentItem(position);
            }
        });
 
        tab.setPadding(tabPadding, 0, tabPadding, 0);
        tabsContainer
                .addView(tab, position, shouldExpand ? expandedTabLayoutParams
                        : defaultTabLayoutParams);
    }
 
    private void updateTabStyles() {
 
        for (int i = 0; i < tabCount; i++) {
 
            View v = tabsContainer.getChildAt(i);
 
            v.setBackgroundResource(tabBackgroundResId);
 
            if (v instanceof TextView) {
 
                TextView tab = (TextView) v;
                tab.setTextSize(TypedValue.COMPLEX_UNIT_PX, tabTextSize);
                tab.setTypeface(tabTypeface, tabTypefaceStyle);
                tab.setTextColor(tabTextColor);
 
                // setAllCaps() is only available from API 14, so the upper case
                // is made manually if we are on a
                // pre-ICS-build
                if (textAllCaps) {
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
                        tab.setAllCaps(true);
                    } else {
                        tab.setText(tab.getText().toString()
                                .toUpperCase(locale));
                    }
                }
                if (i == selectedPosition) {
                    tab.setTextColor(selectedTabTextColor);
                }
            }
        }
 
    }
 
    private void scrollToChild(int position, int offset) {
 
        if (tabCount == 0) {
            return;
        }
 
        int newScrollX = tabsContainer.getChildAt(position).getLeft() + offset;
 
        if (position > 0 || offset > 0) {
            newScrollX -= scrollOffset;
        }
 
        if (newScrollX != lastScrollX) {
            lastScrollX = newScrollX;
            scrollTo(newScrollX, 0);
        }
 
    }
 
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
 
        if (isInEditMode() || tabCount == 0) {
            return;
        }
 
        final int height = getHeight();
 
        // draw underline
        rectPaint.setColor(underlineColor);
        canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(),
                height, rectPaint);
 
        // draw indicator line
        rectPaint.setColor(indicatorColor);
 
        // default: line below current tab
        View currentTab = tabsContainer.getChildAt(currentPosition);
        float lineLeft = currentTab.getLeft();
        float lineRight = currentTab.getRight();
 
        // if there is an offset, start interpolating left and right coordinates
        // between current and next tab
        if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {
 
            View nextTab = tabsContainer.getChildAt(currentPosition + 1);
            final float nextTabLeft = nextTab.getLeft();
            final float nextTabRight = nextTab.getRight();
 
            lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset)
                    * lineLeft);
            lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset)
                    * lineRight);
        }
 
        canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height,
                rectPaint);
 
        // draw divider
 
        dividerPaint.setColor(dividerColor);
        for (int i = 0; i < tabCount - 1; i++) {
            View tab = tabsContainer.getChildAt(i);
            canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(),
                    height - dividerPadding, dividerPaint);
        }
    }
 
    private class PageListener implements OnPageChangeListener {
 
        @Override
        public void onPageScrolled(int position, float positionOffset,
                int positionOffsetPixels) {
            currentPosition = position;
            currentPositionOffset = positionOffset;
 
            scrollToChild(position, (int) (positionOffset * tabsContainer
                    .getChildAt(position).getWidth()));
 
            invalidate();
 
            if (delegatePageListener != null) {
                delegatePageListener.onPageScrolled(position, positionOffset,
                        positionOffsetPixels);
            }
        }
 
        @Override
        public void onPageScrollStateChanged(int state) {
            if (state == ViewPager.SCROLL_STATE_IDLE) {
                scrollToChild(pager.getCurrentItem(), 0);
            }
 
            if (delegatePageListener != null) {
                delegatePageListener.onPageScrollStateChanged(state);
            }
        }
 
        @Override
        public void onPageSelected(int position) {
            selectedPosition = position;
            updateTabStyles();
            if (delegatePageListener != null) {
                delegatePageListener.onPageSelected(position);
            }
        }
 
    }
 
    public void setSelectedPosition(int selectedPosition) {
        this.selectedPosition = selectedPosition;
    }
    
    public void setIndicatorColor(int indicatorColor) {
        this.indicatorColor = indicatorColor;
        invalidate();
    }
 
    public void setIndicatorColorResource(int resId) {
        this.indicatorColor = getResources().getColor(resId);
        invalidate();
    }
 
    public int getIndicatorColor() {
        return this.indicatorColor;
    }
 
    public void setIndicatorHeight(int indicatorLineHeightPx) {
        this.indicatorHeight = indicatorLineHeightPx;
        invalidate();
    }
 
    public int getIndicatorHeight() {
        return indicatorHeight;
    }
 
    public void setUnderlineColor(int underlineColor) {
        this.underlineColor = underlineColor;
        invalidate();
    }
 
    public void setUnderlineColorResource(int resId) {
        this.underlineColor = getResources().getColor(resId);
        invalidate();
    }
 
    public int getUnderlineColor() {
        return underlineColor;
    }
 
    public void setDividerColor(int dividerColor) {
        this.dividerColor = dividerColor;
        invalidate();
    }
 
    public void setDividerColorResource(int resId) {
        this.dividerColor = getResources().getColor(resId);
        invalidate();
    }
 
    public int getDividerColor() {
        return dividerColor;
    }
 
    public void setUnderlineHeight(int underlineHeightPx) {
        this.underlineHeight = underlineHeightPx;
        invalidate();
    }
 
    public int getUnderlineHeight() {
        return underlineHeight;
    }
 
    public void setDividerPadding(int dividerPaddingPx) {
        this.dividerPadding = dividerPaddingPx;
        invalidate();
    }
 
    public int getDividerPadding() {
        return dividerPadding;
    }
 
    public void setScrollOffset(int scrollOffsetPx) {
        this.scrollOffset = scrollOffsetPx;
        invalidate();
    }
 
    public int getScrollOffset() {
        return scrollOffset;
    }
 
    public void setShouldExpand(boolean shouldExpand) {
        this.shouldExpand = shouldExpand;
        notifyDataSetChanged();
    }
 
    public boolean getShouldExpand() {
        return shouldExpand;
    }
 
    public boolean isTextAllCaps() {
        return textAllCaps;
    }
 
    public void setAllCaps(boolean textAllCaps) {
        this.textAllCaps = textAllCaps;
    }
 
    public void setTextSize(int textSizePx) {
        this.tabTextSize = textSizePx;
        updateTabStyles();
    }
 
    public int getTextSize() {
        return tabTextSize;
    }
 
    public void setTextColor(int textColor) {
        this.tabTextColor = textColor;
        updateTabStyles();
    }
 
    public void setTextColorResource(int resId) {
        this.tabTextColor = getResources().getColor(resId);
        updateTabStyles();
    }
 
    public int getTextColor() {
        return tabTextColor;
    }
 
    public void setSelectedTextColor(int textColor) {
        this.selectedTabTextColor = textColor;
        updateTabStyles();
    }
 
    public void setSelectedTextColorResource(int resId) {
        this.selectedTabTextColor = getResources().getColor(resId);
        updateTabStyles();
    }
 
    public int getSelectedTextColor() {
        return selectedTabTextColor;
    }
 
    public void setTypeface(Typeface typeface, int style) {
        this.tabTypeface = typeface;
        this.tabTypefaceStyle = style;
        updateTabStyles();
    }
 
    public void setTabBackground(int resId) {
        this.tabBackgroundResId = resId;
        updateTabStyles();
    }
 
    public int getTabBackground() {
        return tabBackgroundResId;
    }
 
    public void setTabPaddingLeftRight(int paddingPx) {
        this.tabPadding = paddingPx;
        updateTabStyles();
    }
 
    public int getTabPaddingLeftRight() {
        return tabPadding;
    }
 
    @Override
    public void onRestoreInstanceState(Parcelable state) {
        SavedState savedState = (SavedState) state;
        super.onRestoreInstanceState(savedState.getSuperState());
        currentPosition = savedState.currentPosition;
        requestLayout();
    }
 
    @Override
    public Parcelable onSaveInstanceState() {
        Parcelable superState = super.onSaveInstanceState();
        SavedState savedState = new SavedState(superState);
        savedState.currentPosition = currentPosition;
        return savedState;
    }
 
    static class SavedState extends BaseSavedState {
        int currentPosition;
 
        public SavedState(Parcelable superState) {
            super(superState);
        }
 
        private SavedState(Parcel in) {
            super(in);
            currentPosition = in.readInt();
        }
 
        @Override
        public void writeToParcel(Parcel dest, int flags) {
            super.writeToParcel(dest, flags);
            dest.writeInt(currentPosition);
        }
 
        public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
            @Override
            public SavedState createFromParcel(Parcel in) {
                return new SavedState(in);
            }
 
            @Override
            public SavedState[] newArray(int size) {
                return new SavedState[size];
            }
        };
    }
 
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent">
 
      <com.baobao.pagerslidingtabstrip.PagerSlidingTabStrip
        android:id="@+id/slide_tabs"
        android:layout_width="match_parent"
        android:layout_height="40dp"/>
    
    <android.support.v4.view.ViewPager
        android:id="@+id/slide_pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
 
</LinearLayout>

package com.baobao.pagerslidingtabstrip;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.util.DisplayMetrics;
import android.util.TypedValue;
 
public class MainActivity extends FragmentActivity {
    
    private static final int VIEW_PAGE_SIZE = 8;
    
    private PagerSlidingTabStrip mSlideTabs;
    private DisplayMetrics mDm;
    private ViewPager mSlidePager;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化 标签栏
        mDm = getResources().getDisplayMetrics();
        mSlidePager = (ViewPager) findViewById(R.id.slide_pager);
        mSlideTabs = (PagerSlidingTabStrip) findViewById(R.id.slide_tabs);
        if (mSlidePager.getAdapter() == null) {
            mSlidePager.setOffscreenPageLimit(VIEW_PAGE_SIZE);
            mSlidePager.setAdapter(new TabPageIndicatorAdapter(getSupportFragmentManager()));
        }
        mSlideTabs.setViewPager(mSlidePager);
        setTabsValue();
    }
    /**
     * 设置PagerSlidingTabStrip的样式
     */
    private void setTabsValue() {
        
        // 设置Tab是自动填充满屏幕的
        mSlideTabs.setShouldExpand(true);
        // 设置Tab的分割线是透明的
        //tabs.setDividerColor(Color.TRANSPARENT);
        // 设置Tab底部线的高度
        mSlideTabs.setUnderlineHeight((int) TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_DIP, 2, mDm));
        // 设置Tab Indicator的高度
        mSlideTabs.setIndicatorHeight((int) TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_DIP, 1, mDm));
        // 设置Tab标题文字的大小
        mSlideTabs.setTextSize((int) TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_SP, 14, mDm));
        // 设置Tab Indicator的颜色
        mSlideTabs.setIndicatorColor(getResources().getColor(R.color.common_blue));
        // 设置选中Tab文字的颜色 (这是我自定义的一个方法)
        mSlideTabs.setSelectedTextColor(getResources().getColor(R.color.common_blue));
        // 取消点击Tab时的背景色
        mSlideTabs.setTabBackground(0);
    }
    
}