Android 标签栏pagerslidingtabstrip用法实例（含Demo）
【摘要】
（效果图来源于自己写的demo，双击可放大）
大家肯定对这种可滑动的导航标题并不陌生，项目中经常需要用到这种滑动切换的效果，我觉得PagerSlidingTabStrip搭配viewPager的组合最好用了。PagerSlidingTabStrip是一个开源框架，和github上面的其他开源框架使用方法一样
开源...
（效果图来源于自己写的demo，双击可放大）
大家肯定对这种可滑动的导航标题并不陌生，项目中经常需要用到这种滑动切换的效果，我觉得PagerSlidingTabStrip搭配viewPager的组合最好用了。PagerSlidingTabStrip是一个开源框架，和github上面的其他开源框架使用方法一样
我自己习惯用eclipse写个demo,将核心源码拷贝到项目中方便查看，话不多说，上代码
核心的类PagerSlidingTabStrip
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package com.baobao.pagerslidingtabstrip;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.Paint.Style;
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import android.graphics.Typeface;
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import android.os.Build;
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import android.os.Parcel;
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import android.os.Parcelable;
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import android.support.v4.view.ViewPager;
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import android.support.v4.view.ViewPager.OnPageChangeListener;
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import android.util.AttributeSet;
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import android.util.DisplayMetrics;
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import android.util.TypedValue;
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import android.view.Gravity;
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import android.view.View;
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import android.view.ViewTreeObserver.OnGlobalLayoutListener;
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import android.widget.HorizontalScrollView;
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import android.widget.ImageButton;
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import android.widget.LinearLayout;
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import android.widget.TextView;
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import java.util.Locale;
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public class PagerSlidingTabStrip extends HorizontalScrollView {
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public interface IconTabProvider {
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public int getPageIconResId(int position);
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}
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// @formatter:off
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private static final int[] ATTRS = new int[] { android.R.attr.textSize,
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android.R.attr.textColor };
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// @formatter:on
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private LinearLayout.LayoutParams defaultTabLayoutParams;
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private LinearLayout.LayoutParams expandedTabLayoutParams;
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private final PageListener pageListener = new PageListener();
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public OnPageChangeListener delegatePageListener;
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private LinearLayout tabsContainer;
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private ViewPager pager;
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private int tabCount;
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private int currentPosition = 0;
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private int selectedPosition = 0;
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private float currentPositionOffset = 0f;
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private Paint rectPaint;
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private Paint dividerPaint;
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private int indicatorColor = 0xFF666666;
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private int underlineColor = 0x1A000000;
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private int dividerColor = 0x1A000000;
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private boolean shouldExpand = false;
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private boolean textAllCaps = true;
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private int scrollOffset = 52;
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private int indicatorHeight = 8;
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private int underlineHeight = 2;
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private int dividerPadding = 12;
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private int tabPadding = 24;
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private int dividerWidth = 1;
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private int tabTextSize = 12;
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private int tabTextColor = 0xFF666666;
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private int selectedTabTextColor = 0xFF666666;
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private Typeface tabTypeface = null;
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private int tabTypefaceStyle = Typeface.NORMAL;
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private int lastScrollX = 0;
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private int tabBackgroundResId = R.drawable.background_tab;
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private Locale locale;
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public PagerSlidingTabStrip(Context context) {
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this(context, null);
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}
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public PagerSlidingTabStrip(Context context, AttributeSet attrs) {
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this(context, attrs, 0);
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}
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public PagerSlidingTabStrip(Context context, AttributeSet attrs,
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int defStyle) {
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super(context, attrs, defStyle);
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setFillViewport(true);
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setWillNotDraw(false);
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tabsContainer = new LinearLayout(context);
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tabsContainer.setOrientation(LinearLayout.HORIZONTAL);
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tabsContainer.setLayoutParams(new LayoutParams(
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LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
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addView(tabsContainer);
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DisplayMetrics dm = getResources().getDisplayMetrics();
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scrollOffset = (int) TypedValue.applyDimension(
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TypedValue.COMPLEX_UNIT_DIP, scrollOffset, dm);
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indicatorHeight = (int) TypedValue.applyDimension(
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TypedValue.COMPLEX_UNIT_DIP, indicatorHeight, dm);
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underlineHeight = (int) TypedValue.applyDimension(
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TypedValue.COMPLEX_UNIT_DIP, underlineHeight, dm);
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dividerPadding = (int) TypedValue.applyDimension(
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TypedValue.COMPLEX_UNIT_DIP, dividerPadding, dm);
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tabPadding = (int) TypedValue.applyDimension(
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TypedValue.COMPLEX_UNIT_DIP, tabPadding, dm);
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dividerWidth = (int) TypedValue.applyDimension(
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TypedValue.COMPLEX_UNIT_DIP, dividerWidth, dm);
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tabTextSize = (int) TypedValue.applyDimension(
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TypedValue.COMPLEX_UNIT_SP, tabTextSize, dm);
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// get system attrs (android:textSize and android:textColor)
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TypedArray a = context.obtainStyledAttributes(attrs, ATTRS);
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tabTextSize = a.getDimensionPixelSize(0, tabTextSize);
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tabTextColor = a.getColor(1, tabTextColor);
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a.recycle();
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// get custom attrs
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a = context.obtainStyledAttributes(attrs,
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R.styleable.PagerSlidingTabStrip);
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indicatorColor = a.getColor(
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R.styleable.PagerSlidingTabStrip_pstsIndicatorColor,
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indicatorColor);
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underlineColor = a.getColor(
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R.styleable.PagerSlidingTabStrip_pstsUnderlineColor,
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underlineColor);
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dividerColor = a
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.getColor(R.styleable.PagerSlidingTabStrip_pstsDividerColor,
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dividerColor);
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indicatorHeight = a.getDimensionPixelSize(
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R.styleable.PagerSlidingTabStrip_pstsIndicatorHeight,
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indicatorHeight);
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underlineHeight = a.getDimensionPixelSize(
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R.styleable.PagerSlidingTabStrip_pstsUnderlineHeight,
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underlineHeight);
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dividerPadding = a.getDimensionPixelSize(
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R.styleable.PagerSlidingTabStrip_pstsDividerPadding,
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dividerPadding);
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tabPadding = a.getDimensionPixelSize(
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R.styleable.PagerSlidingTabStrip_pstsTabPaddingLeftRight,
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tabPadding);
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tabBackgroundResId = a.getResourceId(
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R.styleable.PagerSlidingTabStrip_pstsTabBackground,
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tabBackgroundResId);
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shouldExpand = a
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.getBoolean(R.styleable.PagerSlidingTabStrip_pstsShouldExpand,
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shouldExpand);
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scrollOffset = a
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.getDimensionPixelSize(
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R.styleable.PagerSlidingTabStrip_pstsScrollOffset,
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scrollOffset);
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textAllCaps = a.getBoolean(
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R.styleable.PagerSlidingTabStrip_pstsTextAllCaps, textAllCaps);
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a.recycle();
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rectPaint = new Paint();
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rectPaint.setAntiAlias(true);
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rectPaint.setStyle(Style.FILL);
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dividerPaint = new Paint();
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dividerPaint.setAntiAlias(true);
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dividerPaint.setStrokeWidth(dividerWidth);
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defaultTabLayoutParams = new LinearLayout.LayoutParams(
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LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
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expandedTabLayoutParams = new LinearLayout.LayoutParams(0,
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LayoutParams.MATCH_PARENT, 1.0f);
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if (locale == null) {
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locale = getResources().getConfiguration().locale;
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}
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}
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public void setViewPager(ViewPager pager) {
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this.pager = pager;
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if (pager.getAdapter() == null) {
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throw new IllegalStateException(
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"ViewPager does not have adapter instance.");
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}
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pager.setOnPageChangeListener(pageListener);
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notifyDataSetChanged();
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}
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public void setOnPageChangeListener(OnPageChangeListener listener) {
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this.delegatePageListener = listener;
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}
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public void notifyDataSetChanged() {
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tabsContainer.removeAllViews();
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tabCount = pager.getAdapter().getCount();
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for (int i = 0; i < tabCount; i++) {
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if (pager.getAdapter() instanceof IconTabProvider) {
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addIconTab(i,
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((IconTabProvider) pager.getAdapter())
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.getPageIconResId(i));
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} else {
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addTextTab(i, pager.getAdapter().getPageTitle(i).toString());
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}
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}
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updateTabStyles();
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getViewTreeObserver().addOnGlobalLayoutListener(
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new OnGlobalLayoutListener() {
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@Override
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public void onGlobalLayout() {
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getViewTreeObserver()
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.removeGlobalOnLayoutListener(this);
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currentPosition = pager.getCurrentItem();
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scrollToChild(currentPosition, 0);
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}
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});
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}
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private void addTextTab(final int position, String title) {
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TextView tab = new TextView(getContext());
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tab.setText(title);
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tab.setGravity(Gravity.CENTER);
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tab.setSingleLine();
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addTab(position, tab);
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}
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private void addIconTab(final int position, int resId) {
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ImageButton tab = new ImageButton(getContext());
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tab.setImageResource(resId);
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addTab(position, tab);
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}
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private void addTab(final int position, View tab) {
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tab.setFocusable(true);
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tab.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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pager.setCurrentItem(position);
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}
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});
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tab.setPadding(tabPadding, 0, tabPadding, 0);
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tabsContainer
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.addView(tab, position, shouldExpand ? expandedTabLayoutParams
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: defaultTabLayoutParams);
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}
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private void updateTabStyles() {
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for (int i = 0; i < tabCount; i++) {
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View v = tabsContainer.getChildAt(i);
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v.setBackgroundResource(tabBackgroundResId);
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if (v instanceof TextView) {
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TextView tab = (TextView) v;
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tab.setTextSize(TypedValue.COMPLEX_UNIT_PX, tabTextSize);
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tab.setTypeface(tabTypeface, tabTypefaceStyle);
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tab.setTextColor(tabTextColor);
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// setAllCaps() is only available from API 14, so the upper case
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// is made manually if we are on a
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// pre-ICS-build
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if (textAllCaps) {
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
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tab.setAllCaps(true);
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} else {
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tab.setText(tab.getText().toString()
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.toUpperCase(locale));
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}
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}
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if (i == selectedPosition) {
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tab.setTextColor(selectedTabTextColor);
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}
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}
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}
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}
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private void scrollToChild(int position, int offset) {
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if (tabCount == 0) {
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return;
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}
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int newScrollX = tabsContainer.getChildAt(position).getLeft() + offset;
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if (position > 0 || offset > 0) {
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newScrollX -= scrollOffset;
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}
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if (newScrollX != lastScrollX) {
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lastScrollX = newScrollX;
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scrollTo(newScrollX, 0);
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}
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}
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@Override
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protected void onDraw(Canvas canvas) {
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super.onDraw(canvas);
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if (isInEditMode() || tabCount == 0) {
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return;
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}
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final int height = getHeight();
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// draw underline
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rectPaint.setColor(underlineColor);
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canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(),
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height, rectPaint);
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// draw indicator line
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rectPaint.setColor(indicatorColor);
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// default: line below current tab
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View currentTab = tabsContainer.getChildAt(currentPosition);
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float lineLeft = currentTab.getLeft();
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float lineRight = currentTab.getRight();
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// if there is an offset, start interpolating left and right coordinates
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// between current and next tab
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if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {
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View nextTab = tabsContainer.getChildAt(currentPosition + 1);
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final float nextTabLeft = nextTab.getLeft();
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final float nextTabRight = nextTab.getRight();
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lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset)
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* lineLeft);
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lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset)
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* lineRight);
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}
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canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height,
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rectPaint);
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// draw divider
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dividerPaint.setColor(dividerColor);
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for (int i = 0; i < tabCount - 1; i++) {
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View tab = tabsContainer.getChildAt(i);
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canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(),
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height - dividerPadding, dividerPaint);
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}
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}
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private class PageListener implements OnPageChangeListener {
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@Override
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public void onPageScrolled(int position, float positionOffset,
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int positionOffsetPixels) {
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currentPosition = position;
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currentPositionOffset = positionOffset;
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scrollToChild(position, (int) (positionOffset * tabsContainer
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.getChildAt(position).getWidth()));
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invalidate();
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if (delegatePageListener != null) {
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delegatePageListener.onPageScrolled(position, positionOffset,
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positionOffsetPixels);
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}
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}
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@Override
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public void onPageScrollStateChanged(int state) {
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if (state == ViewPager.SCROLL_STATE_IDLE) {
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scrollToChild(pager.getCurrentItem(), 0);
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}
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if (delegatePageListener != null) {
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delegatePageListener.onPageScrollStateChanged(state);
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}
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}
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@Override
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public void onPageSelected(int position) {
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selectedPosition = position;
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updateTabStyles();
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if (delegatePageListener != null) {
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delegatePageListener.onPageSelected(position);
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}
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}
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}
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public void setSelectedPosition(int selectedPosition) {
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this.selectedPosition = selectedPosition;
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}
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public void setIndicatorColor(int indicatorColor) {
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this.indicatorColor = indicatorColor;
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invalidate();
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}
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public void setIndicatorColorResource(int resId) {
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this.indicatorColor = getResources().getColor(resId);
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invalidate();
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}
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public int getIndicatorColor() {
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return this.indicatorColor;
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}
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public void setIndicatorHeight(int indicatorLineHeightPx) {
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this.indicatorHeight = indicatorLineHeightPx;
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invalidate();
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}
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public int getIndicatorHeight() {
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return indicatorHeight;
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}
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public void setUnderlineColor(int underlineColor) {
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this.underlineColor = underlineColor;
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invalidate();
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}
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public void setUnderlineColorResource(int resId) {
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this.underlineColor = getResources().getColor(resId);
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invalidate();
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}
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public int getUnderlineColor() {
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return underlineColor;
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}
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public void setDividerColor(int dividerColor) {
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this.dividerColor = dividerColor;
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invalidate();
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}
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public void setDividerColorResource(int resId) {
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this.dividerColor = getResources().getColor(resId);
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invalidate();
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}
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public int getDividerColor() {
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return dividerColor;
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}
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public void setUnderlineHeight(int underlineHeightPx) {
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this.underlineHeight = underlineHeightPx;
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invalidate();
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}
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public int getUnderlineHeight() {
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return underlineHeight;
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}
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public void setDividerPadding(int dividerPaddingPx) {
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this.dividerPadding = dividerPaddingPx;
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invalidate();
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}
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public int getDividerPadding() {
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return dividerPadding;
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}
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public void setScrollOffset(int scrollOffsetPx) {
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this.scrollOffset = scrollOffsetPx;
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invalidate();
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}
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public int getScrollOffset() {
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return scrollOffset;
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}
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public void setShouldExpand(boolean shouldExpand) {
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this.shouldExpand = shouldExpand;
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notifyDataSetChanged();
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}
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public boolean getShouldExpand() {
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return shouldExpand;
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}
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public boolean isTextAllCaps() {
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return textAllCaps;
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}
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public void setAllCaps(boolean textAllCaps) {
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this.textAllCaps = textAllCaps;
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}
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public void setTextSize(int textSizePx) {
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this.tabTextSize = textSizePx;
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updateTabStyles();
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}
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public int getTextSize() {
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return tabTextSize;
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}
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public void setTextColor(int textColor) {
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this.tabTextColor = textColor;
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updateTabStyles();
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}
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public void setTextColorResource(int resId) {
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this.tabTextColor = getResources().getColor(resId);
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updateTabStyles();
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}
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public int getTextColor() {
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return tabTextColor;
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}
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public void setSelectedTextColor(int textColor) {
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this.selectedTabTextColor = textColor;
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updateTabStyles();
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}
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public void setSelectedTextColorResource(int resId) {
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this.selectedTabTextColor = getResources().getColor(resId);
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updateTabStyles();
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}
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public int getSelectedTextColor() {
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return selectedTabTextColor;
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}
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public void setTypeface(Typeface typeface, int style) {
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this.tabTypeface = typeface;
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this.tabTypefaceStyle = style;
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updateTabStyles();
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}
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public void setTabBackground(int resId) {
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this.tabBackgroundResId = resId;
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updateTabStyles();
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}
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public int getTabBackground() {
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return tabBackgroundResId;
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}
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public void setTabPaddingLeftRight(int paddingPx) {
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this.tabPadding = paddingPx;
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updateTabStyles();
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}
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public int getTabPaddingLeftRight() {
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return tabPadding;
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}
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@Override
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public void onRestoreInstanceState(Parcelable state) {
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SavedState savedState = (SavedState) state;
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super.onRestoreInstanceState(savedState.getSuperState());
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currentPosition = savedState.currentPosition;
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requestLayout();
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}
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@Override
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public Parcelable onSaveInstanceState() {
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Parcelable superState = super.onSaveInstanceState();
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SavedState savedState = new SavedState(superState);
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savedState.currentPosition = currentPosition;
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return savedState;
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}
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static class SavedState extends BaseSavedState {
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int currentPosition;
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public SavedState(Parcelable superState) {
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super(superState);
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}
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private SavedState(Parcel in) {
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super(in);
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currentPosition = in.readInt();
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}
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@Override
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public void writeToParcel(Parcel dest, int flags) {
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super.writeToParcel(dest, flags);
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dest.writeInt(currentPosition);
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}
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public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
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@Override
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public SavedState createFromParcel(Parcel in) {
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return new SavedState(in);
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}
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@Override
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public SavedState[] newArray(int size) {
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return new SavedState[size];
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}
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};
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}
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}
xml布局中直接引用
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:orientation="vertical"
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android:layout_height="match_parent">
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<com.baobao.pagerslidingtabstrip.PagerSlidingTabStrip
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android:id="@+id/slide_tabs"
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android:layout_width="match_parent"
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android:layout_height="40dp"/>
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<android.support.v4.view.ViewPager
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android:id="@+id/slide_pager"
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android:layout_width="match_parent"
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android:layout_height="match_parent" />
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</LinearLayout>
Activity代码
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package com.baobao.pagerslidingtabstrip;
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import android.os.Bundle;
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import android.support.v4.app.FragmentActivity;
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import android.support.v4.view.ViewPager;
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import android.util.DisplayMetrics;
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import android.util.TypedValue;
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public class MainActivity extends FragmentActivity {
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private static final int VIEW_PAGE_SIZE = 8;
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private PagerSlidingTabStrip mSlideTabs;
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private DisplayMetrics mDm;
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private ViewPager mSlidePager;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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//初始化 标签栏
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mDm = getResources().getDisplayMetrics();
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mSlidePager = (ViewPager) findViewById(R.id.slide_pager);
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mSlideTabs = (PagerSlidingTabStrip) findViewById(R.id.slide_tabs);
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if (mSlidePager.getAdapter() == null) {
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mSlidePager.setOffscreenPageLimit(VIEW_PAGE_SIZE);
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mSlidePager.setAdapter(new TabPageIndicatorAdapter(getSupportFragmentManager()));
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}
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mSlideTabs.setViewPager(mSlidePager);
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setTabsValue();
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}
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/**
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* 设置PagerSlidingTabStrip的样式
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*/
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private void setTabsValue() {
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// 设置Tab是自动填充满屏幕的
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mSlideTabs.setShouldExpand(true);
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// 设置Tab的分割线是透明的
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//tabs.setDividerColor(Color.TRANSPARENT);
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// 设置Tab底部线的高度
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mSlideTabs.setUnderlineHeight((int) TypedValue.applyDimension(
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TypedValue.COMPLEX_UNIT_DIP, 2, mDm));
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// 设置Tab Indicator的高度
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mSlideTabs.setIndicatorHeight((int) TypedValue.applyDimension(
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TypedValue.COMPLEX_UNIT_DIP, 1, mDm));
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// 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);
-
}
-
-
}
样式文件 attrs.xml
-
<resources>
-
-
<declare-styleable name="Themes">
-
<attr name="numberProgressBarStyle" format="reference" />
-
</declare-styleable>
-
<declare-styleable name="mGallery">
-
<attr name="android:galleryItemBackground" />
-
</declare-styleable>
-
<declare-styleable name="PagerSlidingTabStrip">
-
<attr name="pstsIndicatorColor" format="color" />
-
<attr name="pstsUnderlineColor" format="color" />
-
<attr name="pstsDividerColor" format="color" />
-
<attr name="pstsIndicatorHeight" format="dimension" />
-
<attr name="pstsUnderlineHeight" format="dimension" />
-
<attr name="pstsDividerPadding" format="dimension" />
-
<attr name="pstsTabPaddingLeftRight" format="dimension" />
-
<attr name="pstsScrollOffset" format="dimension" />
-
<attr name="pstsTabBackground" format="reference" />
-
<attr name="pstsShouldExpand" format="boolean" />
-
<attr name="pstsTextAllCaps" format="boolean" />
-
</declare-styleable>
-
-
</resources>
效果图如上图，希望可以帮助到大家，如果大家还有其他问题欢迎加入我的qq群讨论交流：
开发一群：454430053开发二群：537532956
文章来源: wukong.blog.csdn.net，作者：再见孙悟空_，版权归原作者所有，如需转载，请联系作者。
原文链接：wukong.blog.csdn.net/article/details/79360351
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