content: package com.flyco.tablayout;
  
  import android.content.Context;
  import android.content.res.TypedArray;
  import android.graphics.Canvas;
  import android.graphics.Color;
  import android.graphics.Paint;
  import android.graphics.Path;
  import android.graphics.Rect;
  import android.graphics.Typeface;
  import android.graphics.drawable.GradientDrawable;
  import android.os.Bundle;
  import android.os.Parcelable;
  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.LinearLayout;
  import android.widget.TextView;
  import androidx.fragment.app.Fragment;
  import androidx.fragment.app.FragmentActivity;
  import androidx.fragment.app.FragmentManager;
  import androidx.fragment.app.FragmentPagerAdapter;
  import androidx.viewpager.widget.PagerAdapter;
  import androidx.viewpager.widget.ViewPager;
  import com.bihe0832.android.lib.media.image.GlideExtKt;
  import com.bihe0832.android.lib.request.URLUtils;
  import com.bihe0832.android.lib.ui.custom.view.background.TextViewWithBackground;
  import com.flyco.tablayout.listener.OnTabSelectListener;
  import java.util.ArrayList;
  import java.util.Collections;
  
  /**
   * 滑动TabLayout,对于ViewPager的依赖性强
   */
  public class SlidingTabLayout extends HorizontalScrollView implements ViewPager.OnPageChangeListener {
  
      private static final int STYLE_NORMAL = 0;
      private static final int STYLE_TRIANGLE = 1;
      private static final int STYLE_BLOCK = 2;
      /**
       * title
       */
      private static final int TEXT_BOLD_NONE = 0;
      private static final int TEXT_BOLD_WHEN_SELECT = 1;
      private static final int TEXT_BOLD_BOTH = 2;
      protected LinearLayout mTabsContainer;
      /**
       * 用于实现滚动居中
       */
      protected Rect mTabRect = new Rect();
      private Context mContext;
      private ViewPager mViewPager;
      private ArrayList<String> mTitles;
      private int mCurrentTab;
      private float mCurrentPositionOffset;
      private int mTabCount;
      /**
       * 用于绘制显示器
       */
      private Rect mIndicatorRect = new Rect();
      private GradientDrawable mIndicatorDrawable = new GradientDrawable();
      private Paint mRectPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
      private Paint mDividerPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
      private Paint mTrianglePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
      private Path mTrianglePath = new Path();
      private int mIndicatorStyle = STYLE_NORMAL;
      private float mTabPadding;
      private boolean mTabSpaceEqual;
      private float mTabWidth;
      /**
       * indicator
       */
      private int mIndicatorColor;
      private float mIndicatorHeight;
      private float mIndicatorWidth;
      private float mIndicatorCornerRadius;
      private float mIndicatorMarginLeft;
      private float mIndicatorMarginTop;
      private float mIndicatorMarginRight;
      private float mIndicatorMarginBottom;
      private int mIndicatorGravity;
      private boolean mIndicatorWidthEqualTitle;
      /**
       * underline
       */
      private int mUnderlineColor;
      private float mUnderlineHeight;
      private int mUnderlineGravity;
      /**
       * divider
       */
      private int mDividerColor;
      private float mDividerWidth;
      private float mDividerPadding;
      private float mTextsize;
      private int mTextSelectColor;
      private int mTextUnselectColor;
      private int mTextBold;
      private boolean mTextAllCaps;
  
      private int mLastScrollX;
      private int mHeight;
      private boolean mSnapOnTabClick;
      private float margin;
      // show MsgTipView
      private Paint mTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
      private SparseArray<Boolean> mInitSetMap = new SparseArray<>();
      private OnTabSelectListener mListener;
  
      public SlidingTabLayout(Context context) {
          this(context, null, 0);
      }
  
      public SlidingTabLayout(Context context, AttributeSet attrs) {
          this(context, attrs, 0);
      }
  
      public SlidingTabLayout(Context context, AttributeSet attrs, int defStyleAttr) {
          super(context, attrs, defStyleAttr);
          setFillViewport(true);//设置滚动视图是否可以伸缩其内容以填充视口
          setWillNotDraw(false);//重写onDraw方法,需要调用这个方法来清除flag
          setClipChildren(false);
          setClipToPadding(false);
  
          this.mContext = context;
          initView(context);
  
          obtainAttributes(context, attrs);
  
          //get layout_height
          String height = attrs.getAttributeValue("http://schemas.android.com/apk/res/android", "layout_height");
  
          if (height.equals(ViewGroup.LayoutParams.MATCH_PARENT + "")) {
          } else if (height.equals(ViewGroup.LayoutParams.WRAP_CONTENT + "")) {
          } else {
              int[] systemAttrs = {android.R.attr.layout_height};
              TypedArray a = context.obtainStyledAttributes(attrs, systemAttrs);
              mHeight = a.getDimensionPixelSize(0, ViewGroup.LayoutParams.WRAP_CONTENT);
              a.recycle();
          }
      }
  
      protected void initView(Context context) {
          mTabsContainer = new LinearLayout(context);
          addView(mTabsContainer);
      }
  
      private void obtainAttributes(Context context, AttributeSet attrs) {
          TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.SlidingTabLayout);
  
          mIndicatorStyle = ta.getInt(R.styleable.SlidingTabLayout_tl_indicator_style, STYLE_NORMAL);
          mIndicatorColor = ta.getColor(R.styleable.SlidingTabLayout_tl_indicator_color,
                  Color.parseColor(mIndicatorStyle == STYLE_BLOCK ? "#4B6A87" : "#ffffff"));
          mIndicatorHeight = ta.getDimension(R.styleable.SlidingTabLayout_tl_indicator_height,
                  dp2px(mIndicatorStyle == STYLE_TRIANGLE ? 4 : (mIndicatorStyle == STYLE_BLOCK ? -1 : 2)));
          mIndicatorWidth = ta.getDimension(R.styleable.SlidingTabLayout_tl_indicator_width,
                  dp2px(mIndicatorStyle == STYLE_TRIANGLE ? 10 : -1));
          mIndicatorCornerRadius = ta.getDimension(R.styleable.SlidingTabLayout_tl_indicator_corner_radius,
                  dp2px(mIndicatorStyle == STYLE_BLOCK ? -1 : 0));
          mIndicatorMarginLeft = ta.getDimension(R.styleable.SlidingTabLayout_tl_indicator_margin_left, dp2px(0));
          mIndicatorMarginTop = ta.getDimension(R.styleable.SlidingTabLayout_tl_indicator_margin_top,
                  dp2px(mIndicatorStyle == STYLE_BLOCK ? 7 : 0));
          mIndicatorMarginRight = ta.getDimension(R.styleable.SlidingTabLayout_tl_indicator_margin_right, dp2px(0));
          mIndicatorMarginBottom = ta.getDimension(R.styleable.SlidingTabLayout_tl_indicator_margin_bottom,
                  dp2px(mIndicatorStyle == STYLE_BLOCK ? 7 : 0));
          mIndicatorGravity = ta.getInt(R.styleable.SlidingTabLayout_tl_indicator_gravity, Gravity.BOTTOM);
          mIndicatorWidthEqualTitle = ta.getBoolean(R.styleable.SlidingTabLayout_tl_indicator_width_equal_title, false);
  
          mUnderlineColor = ta.getColor(R.styleable.SlidingTabLayout_tl_underline_color, Color.parseColor("#ffffff"));
          mUnderlineHeight = ta.getDimension(R.styleable.SlidingTabLayout_tl_underline_height, dp2px(0));
          mUnderlineGravity = ta.getInt(R.styleable.SlidingTabLayout_tl_underline_gravity, Gravity.BOTTOM);
  
          mDividerColor = ta.getColor(R.styleable.SlidingTabLayout_tl_divider_color, Color.parseColor("#ffffff"));
          mDividerWidth = ta.getDimension(R.styleable.SlidingTabLayout_tl_divider_width, dp2px(0));
          mDividerPadding = ta.getDimension(R.styleable.SlidingTabLayout_tl_divider_padding, dp2px(12));
  
          mTextsize = ta.getDimension(R.styleable.SlidingTabLayout_tl_textsize, sp2px(14));
          mTextSelectColor = ta.getColor(R.styleable.SlidingTabLayout_tl_textSelectColor, Color.parseColor("#ffffff"));
          mTextUnselectColor = ta.getColor(R.styleable.SlidingTabLayout_tl_textUnselectColor,
                  Color.parseColor("#AAffffff"));
          mTextBold = ta.getInt(R.styleable.SlidingTabLayout_tl_textBold, TEXT_BOLD_NONE);
          mTextAllCaps = ta.getBoolean(R.styleable.SlidingTabLayout_tl_textAllCaps, false);
  
          mTabSpaceEqual = ta.getBoolean(R.styleable.SlidingTabLayout_tl_tab_space_equal, true);
          mTabWidth = ta.getDimension(R.styleable.SlidingTabLayout_tl_tab_width, dp2px(-1));
          mTabPadding = ta.getDimension(R.styleable.SlidingTabLayout_tl_tab_padding,
                  mTabSpaceEqual || mTabWidth > 0 ? dp2px(0) : dp2px(20));
  
          ta.recycle();
      }
  
      /**
       * 关联ViewPager
       */
      public void setViewPager(ViewPager vp) {
          if (vp == null || vp.getAdapter() == null) {
              throw new IllegalStateException("ViewPager or ViewPager adapter can not be NULL !");
          }
  
          this.mViewPager = vp;
  
          this.mViewPager.removeOnPageChangeListener(this);
          this.mViewPager.addOnPageChangeListener(this);
          notifyDataSetChanged();
      }
  
      /**
       * 关联ViewPager,用于不想在ViewPager适配器中设置titles数据的情况
       */
      public void setViewPager(ViewPager vp, String[] titles) {
          if (vp == null || vp.getAdapter() == null) {
              throw new IllegalStateException("ViewPager or ViewPager adapter can not be NULL !");
          }
  
          if (titles == null || titles.length == 0) {
              throw new IllegalStateException("Titles can not be EMPTY !");
          }
  
          if (titles.length != vp.getAdapter().getCount()) {
              throw new IllegalStateException("Titles length must be the same as the page count !");
          }
  
          this.mViewPager = vp;
          mTitles = new ArrayList<>();
          Collections.addAll(mTitles, titles);
  
          this.mViewPager.removeOnPageChangeListener(this);
          this.mViewPager.addOnPageChangeListener(this);
          notifyDataSetChanged();
      }
  
      /**
       * 关联ViewPager,用于连适配器都不想自己实例化的情况
       */
      public void setViewPager(ViewPager vp, String[] titles, FragmentActivity fa, ArrayList<Fragment> fragments) {
          if (vp == null) {
              throw new IllegalStateException("ViewPager can not be NULL !");
          }
  
          if (titles == null || titles.length == 0) {
              throw new IllegalStateException("Titles can not be EMPTY !");
          }
  
          this.mViewPager = vp;
          this.mViewPager.setAdapter(new InnerPagerAdapter(fa.getSupportFragmentManager(), fragments, titles));
  
          this.mViewPager.removeOnPageChangeListener(this);
          this.mViewPager.addOnPageChangeListener(this);
          notifyDataSetChanged();
      }
  
      /**
       * 更新数据
       */
      public void notifyDataSetChanged() {
          mTabsContainer.removeAllViews();
          this.mTabCount = mTitles == null ? mViewPager.getAdapter().getCount() : mTitles.size();
          View tabView;
          for (int i = 0; i < mTabCount; i++) {
              tabView = View.inflate(mContext, R.layout.layout_tab, null);
              CharSequence pageTitle = mTitles == null ? mViewPager.getAdapter().getPageTitle(i) : mTitles.get(i);
              addTab(i, pageTitle, tabView);
          }
  
          updateTabStyles();
      }
  
      public void addNewTab(String title) {
          View tabView = View.inflate(mContext, R.layout.layout_tab, null);
          if (mTitles != null) {
              mTitles.add(title);
          }
  
          CharSequence pageTitle =
                  mTitles == null ? mViewPager.getAdapter().getPageTitle(mTabCount) : mTitles.get(mTabCount);
          addTab(mTabCount, pageTitle.toString(), tabView);
          this.mTabCount = mTitles == null ? mViewPager.getAdapter().getCount() : mTitles.size();
  
          updateTabStyles();
      }
  
      /**
       * 创建并添加tab
       */
      private void addTab(final int position, CharSequence title, View tabView) {
          TextView tv_tab_title_text = (TextView) tabView.findViewById(R.id.tv_tab_title);
          ImageView tv_tab_title_image = (ImageView) tabView.findViewById(R.id.tv_tab_image);
          if (URLUtils.isHTTPUrl(title.toString())) {
              if (tv_tab_title_text != null) {
                  tv_tab_title_text.setVisibility(View.GONE);
  
              }
              if (tv_tab_title_image != null) {
                  tv_tab_title_image.setVisibility(View.VISIBLE);
                  GlideExtKt.loadCircleCropImage(tv_tab_title_image, title.toString(), Color.TRANSPARENT,
                          Color.TRANSPARENT);
              }
          } else {
              if (tv_tab_title_text != null) {
                  tv_tab_title_text.setVisibility(View.VISIBLE);
                  if (title != null) {
                      tv_tab_title_text.setText(title);
                  }
              }
  
              if (tv_tab_title_image != null) {
                  tv_tab_title_image.setVisibility(View.GONE);
              }
          }
  
          tabView.setOnClickListener(new OnClickListener() {
              @Override
              public void onClick(View v) {
                  int position = mTabsContainer.indexOfChild(v);
                  if (position != -1) {
                      if (mSnapOnTabClick) {
                          mViewPager.setCurrentItem(position, false);
                      } else {
                          mViewPager.setCurrentItem(position);
                      }
                  }
              }
          });
  
          /** 每一个Tab的布局参数 */
          LinearLayout.LayoutParams lp_tab =
                  mTabSpaceEqual ? new LinearLayout.LayoutParams(0, LayoutParams.MATCH_PARENT, 1.0f)
                          : new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
          if (mTabWidth > 0) {
              lp_tab = new LinearLayout.LayoutParams((int) mTabWidth, LayoutParams.MATCH_PARENT);
          }
          mTabsContainer.addView(tabView, position, lp_tab);
      }
  
      private void updateTabStyles() {
          for (int i = 0; i < mTabCount; i++) {
              View v = mTabsContainer.getChildAt(i);
  //            v.setPadding((int) mTabPadding, v.getPaddingTop(), (int) mTabPadding, v.getPaddingBottom());
              TextView tv_tab_title = (TextView) v.findViewById(R.id.tv_tab_title);
              ImageView tv_tab_title_image = (ImageView) v.findViewById(R.id.tv_tab_image);
              if (tv_tab_title != null) {
                  boolean isSelected = i == mCurrentTab;
                  tv_tab_title.setTextColor(isSelected ? mTextSelectColor : mTextUnselectColor);
                  tv_tab_title.setTextSize(TypedValue.COMPLEX_UNIT_PX, mTextsize);
                  tv_tab_title.setPadding((int) mTabPadding, 0, (int) mTabPadding, 0);
                  if (mTextAllCaps) {
                      tv_tab_title.setText(tv_tab_title.getText().toString().toUpperCase());
                  }
  
                  if (mTextBold == TEXT_BOLD_BOTH) {
                      tv_tab_title.setTypeface(null, Typeface.BOLD);
                  } else if (mTextBold == TEXT_BOLD_WHEN_SELECT && isSelected) {
                      tv_tab_title.setTypeface(null, Typeface.BOLD);
                  } else {
                      tv_tab_title.setTypeface(null, Typeface.NORMAL);
                  }
              }
  
              if (tv_tab_title_image != null) {
                  tv_tab_title_image.setPadding((int) mTabPadding, 0, (int) mTabPadding, 0);
              }
          }
      }
  
      @Override
      public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
          /**
           * position:当前View的位置
           * mCurrentPositionOffset:当前View的偏移量比例.[0,1)
           */
          this.mCurrentTab = position;
          this.mCurrentPositionOffset = positionOffset;
          scrollToCurrentTab();
          invalidate();
      }
  
      @Override
      public void onPageSelected(int position) {
          updateTabSelection(position);
      }
  
      @Override
      public void onPageScrollStateChanged(int state) {
      }
  
      /**
       * HorizontalScrollView滚到当前tab,并且居中显示
       */
      private void scrollToCurrentTab() {
          if (mTabCount <= 0 || mCurrentTab > mTabCount) {
              return;
          }
  
          int offset = (int) (mCurrentPositionOffset * mTabsContainer.getChildAt(mCurrentTab).getWidth());
          /**当前Tab的left+当前Tab的Width乘以positionOffset*/
          int newScrollX = mTabsContainer.getChildAt(mCurrentTab).getLeft() + offset;
  
          if (mCurrentTab > 0 || offset > 0) {
              /**HorizontalScrollView移动到当前tab,并居中*/
              newScrollX -= getWidth() / 2 - getPaddingLeft();
              calcIndicatorRect();
              newScrollX += ((mTabRect.right - mTabRect.left) / 2);
          }
  
          if (newScrollX != mLastScrollX) {
              mLastScrollX = newScrollX;
              /** scrollTo（int x,int y）:x,y代表的不是坐标点,而是偏移量
               *  x:表示离起始位置的x水平方向的偏移量
               *  y:表示离起始位置的y垂直方向的偏移量
               */
              scrollTo(newScrollX, 0);
          }
      }
  
      private void updateTabSelection(int position) {
          for (int i = 0; i < mTabCount; ++i) {
              View tabView = mTabsContainer.getChildAt(i);
              final boolean isSelected = i == position;
              TextView tab_title = (TextView) tabView.findViewById(R.id.tv_tab_title);
              if (tab_title != null) {
                  tab_title.setTextColor(isSelected ? mTextSelectColor : mTextUnselectColor);
                  if (mTextBold == TEXT_BOLD_BOTH) {
                      tab_title.setTypeface(null, Typeface.BOLD);
                  } else if (mTextBold == TEXT_BOLD_WHEN_SELECT && isSelected) {
                      tab_title.setTypeface(null, Typeface.BOLD);
                  } else {
                      tab_title.setTypeface(null, Typeface.NORMAL);
                  }
              }
          }
          if (null != mListener) {
              mListener.onTabSelect(position);
          }
      }
  
      private void calcIndicatorRect() {
          View currentTabView = mTabsContainer.getChildAt(this.mCurrentTab);
          float left = currentTabView.getLeft();
          float right = currentTabView.getRight();
  
          //for mIndicatorWidthEqualTitle
          if (mIndicatorStyle == STYLE_NORMAL && mIndicatorWidthEqualTitle) {
              TextView tab_title = (TextView) currentTabView.findViewById(R.id.tv_tab_title);
              mTextPaint.setTextSize(mTextsize);
              float textWidth = mTextPaint.measureText(tab_title.getText().toString());
              margin = (right - left - textWidth) / 2;
          }
  
          if (this.mCurrentTab < mTabCount - 1) {
              View nextTabView = mTabsContainer.getChildAt(this.mCurrentTab + 1);
              float nextTabLeft = nextTabView.getLeft();
              float nextTabRight = nextTabView.getRight();
  
              left = left + mCurrentPositionOffset * (nextTabLeft - left);
              right = right + mCurrentPositionOffset * (nextTabRight - right);
  
              //for mIndicatorWidthEqualTitle
              if (mIndicatorStyle == STYLE_NORMAL && mIndicatorWidthEqualTitle) {
                  TextView next_tab_title = (TextView) nextTabView.findViewById(R.id.tv_tab_title);
                  mTextPaint.setTextSize(mTextsize);
                  float nextTextWidth = mTextPaint.measureText(next_tab_title.getText().toString());
                  float nextMargin = (nextTabRight - nextTabLeft - nextTextWidth) / 2;
                  margin = margin + mCurrentPositionOffset * (nextMargin - margin);
              }
          }
  
          mIndicatorRect.left = (int) left;
          mIndicatorRect.right = (int) right;
          //for mIndicatorWidthEqualTitle
          if (mIndicatorStyle == STYLE_NORMAL && mIndicatorWidthEqualTitle) {
              mIndicatorRect.left = (int) (left + margin - 1);
              mIndicatorRect.right = (int) (right - margin - 1);
          }
  
          mTabRect.left = (int) left;
          mTabRect.right = (int) right;
  
          if (mIndicatorWidth < 0) {   //indicatorWidth小于0时,原jpardogo's PagerSlidingTabStrip
  
          } else {//indicatorWidth大于0时,圆角矩形以及三角形
              float indicatorLeft = currentTabView.getLeft() + (currentTabView.getWidth() - mIndicatorWidth) / 2;
  
              if (this.mCurrentTab < mTabCount - 1) {
                  View nextTab = mTabsContainer.getChildAt(this.mCurrentTab + 1);
                  indicatorLeft = indicatorLeft + mCurrentPositionOffset * (currentTabView.getWidth() / 2
                          + nextTab.getWidth() / 2);
              }
  
              mIndicatorRect.left = (int) indicatorLeft;
              mIndicatorRect.right = (int) (mIndicatorRect.left + mIndicatorWidth);
          }
      }
  
      @Override
      protected void onDraw(Canvas canvas) {
          super.onDraw(canvas);
  
          if (isInEditMode() || mTabCount <= 0) {
              return;
          }
  
          int height = getHeight();
          int paddingLeft = getPaddingLeft();
          // draw divider
          if (mDividerWidth > 0) {
              mDividerPaint.setStrokeWidth(mDividerWidth);
              mDividerPaint.setColor(mDividerColor);
              for (int i = 0; i < mTabCount - 1; i++) {
                  View tab = mTabsContainer.getChildAt(i);
                  canvas.drawLine(paddingLeft + tab.getRight(), mDividerPadding, paddingLeft + tab.getRight(),
                          height - mDividerPadding, mDividerPaint);
              }
          }
  
          // draw underline
          if (mUnderlineHeight > 0) {
              mRectPaint.setColor(mUnderlineColor);
              if (mUnderlineGravity == Gravity.BOTTOM) {
                  canvas.drawRect(paddingLeft, height - mUnderlineHeight, mTabsContainer.getWidth() + paddingLeft, height,
                          mRectPaint);
              } else {
                  canvas.drawRect(paddingLeft, 0, mTabsContainer.getWidth() + paddingLeft, mUnderlineHeight, mRectPaint);
              }
          }
  
          //draw indicator line
  
          calcIndicatorRect();
          if (mIndicatorStyle == STYLE_TRIANGLE) {
              if (mIndicatorHeight > 0) {
                  mTrianglePaint.setColor(mIndicatorColor);
                  mTrianglePath.reset();
                  mTrianglePath.moveTo(paddingLeft + mIndicatorRect.left, height);
                  mTrianglePath.lineTo(paddingLeft + mIndicatorRect.left / 2 + mIndicatorRect.right / 2,
                          height - mIndicatorHeight);
                  mTrianglePath.lineTo(paddingLeft + mIndicatorRect.right, height);
                  mTrianglePath.close();
                  canvas.drawPath(mTrianglePath, mTrianglePaint);
              }
          } else if (mIndicatorStyle == STYLE_BLOCK) {
              if (mIndicatorHeight < 0) {
                  mIndicatorHeight = height - mIndicatorMarginTop - mIndicatorMarginBottom;
              } else {
  
              }
  
              if (mIndicatorHeight > 0) {
                  if (mIndicatorCornerRadius < 0 || mIndicatorCornerRadius > mIndicatorHeight / 2) {
                      mIndicatorCornerRadius = mIndicatorHeight / 2;
                  }
  
                  mIndicatorDrawable.setColor(mIndicatorColor);
                  mIndicatorDrawable.setBounds(paddingLeft + (int) mIndicatorMarginLeft + mIndicatorRect.left,
                          (int) mIndicatorMarginTop, (int) (paddingLeft + mIndicatorRect.right - mIndicatorMarginRight),
                          (int) (mIndicatorMarginTop + mIndicatorHeight));
                  mIndicatorDrawable.setCornerRadius(mIndicatorCornerRadius);
                  mIndicatorDrawable.draw(canvas);
              }
          } else {
                 /* mRectPaint.setColor(mIndicatorColor);
                  calcIndicatorRect();
                  canvas.drawRect(getPaddingLeft() + mIndicatorRect.left, getHeight() - mIndicatorHeight,
                          mIndicatorRect.right + getPaddingLeft(), getHeight(), mRectPaint);*/
  
              if (mIndicatorHeight > 0) {
                  mIndicatorDrawable.setColor(mIndicatorColor);
  
                  if (mIndicatorGravity == Gravity.BOTTOM) {
                      mIndicatorDrawable.setBounds(paddingLeft + (int) mIndicatorMarginLeft + mIndicatorRect.left,
                              height - (int) mIndicatorHeight - (int) mIndicatorMarginBottom,
                              paddingLeft + mIndicatorRect.right - (int) mIndicatorMarginRight,
                              height - (int) mIndicatorMarginBottom);
                  } else {
                      mIndicatorDrawable.setBounds(paddingLeft + (int) mIndicatorMarginLeft + mIndicatorRect.left,
                              (int) mIndicatorMarginTop, paddingLeft + mIndicatorRect.right - (int) mIndicatorMarginRight,
                              (int) mIndicatorHeight + (int) mIndicatorMarginTop);
                  }
                  mIndicatorDrawable.setCornerRadius(mIndicatorCornerRadius);
                  mIndicatorDrawable.draw(canvas);
              }
          }
      }
  
      public void setCurrentTab(int currentTab, boolean smoothScroll) {
          this.mCurrentTab = currentTab;
          mViewPager.setCurrentItem(currentTab, smoothScroll);
      }
  
      public void setIndicatorGravity(int indicatorGravity) {
          this.mIndicatorGravity = indicatorGravity;
          invalidate();
      }
  
      public void setIndicatorMargin(float indicatorMarginLeft, float indicatorMarginTop, float indicatorMarginRight,
              float indicatorMarginBottom) {
          this.mIndicatorMarginLeft = dp2px(indicatorMarginLeft);
          this.mIndicatorMarginTop = dp2px(indicatorMarginTop);
          this.mIndicatorMarginRight = dp2px(indicatorMarginRight);
          this.mIndicatorMarginBottom = dp2px(indicatorMarginBottom);
          invalidate();
      }
  
      public void setIndicatorWidthEqualTitle(boolean indicatorWidthEqualTitle) {
          this.mIndicatorWidthEqualTitle = indicatorWidthEqualTitle;
          invalidate();
      }
  
      public void setUnderlineGravity(int underlineGravity) {
          this.mUnderlineGravity = underlineGravity;
          invalidate();
      }
  
      public void setSnapOnTabClick(boolean snapOnTabClick) {
          mSnapOnTabClick = snapOnTabClick;
      }
  
      public int getTabCount() {
          return mTabCount;
      }
  
      public int getCurrentTab() {
          return mCurrentTab;
      }
  
      //setter and getter
      public void setCurrentTab(int currentTab) {
          this.mCurrentTab = currentTab;
          mViewPager.setCurrentItem(currentTab);
  
      }
  
      public int getIndicatorStyle() {
          return mIndicatorStyle;
      }
  
      public void setIndicatorStyle(int indicatorStyle) {
          this.mIndicatorStyle = indicatorStyle;
          invalidate();
      }
  
      public float getTabPadding() {
          return mTabPadding;
      }
  
      public void setTabPadding(float tabPadding) {
          this.mTabPadding = dp2px(tabPadding);
          updateTabStyles();
      }
  
      public boolean isTabSpaceEqual() {
          return mTabSpaceEqual;
      }
  
      public void setTabSpaceEqual(boolean tabSpaceEqual) {
          this.mTabSpaceEqual = tabSpaceEqual;
          updateTabStyles();
      }
  
      public float getTabWidth() {
          return mTabWidth;
      }
  
      public void setTabWidth(float tabWidth) {
          this.mTabWidth = dp2px(tabWidth);
          updateTabStyles();
      }
  
      public int getIndicatorColor() {
          return mIndicatorColor;
      }
  
      public void setIndicatorColor(int indicatorColor) {
          this.mIndicatorColor = indicatorColor;
          invalidate();
      }
  
      public float getIndicatorHeight() {
          return mIndicatorHeight;
      }
  
      public void setIndicatorHeight(float indicatorHeight) {
          this.mIndicatorHeight = dp2px(indicatorHeight);
          invalidate();
      }
  
      public float getIndicatorWidth() {
          return mIndicatorWidth;
      }
  
      public void setIndicatorWidth(float indicatorWidth) {
          this.mIndicatorWidth = dp2px(indicatorWidth);
          invalidate();
      }
  
      public float getIndicatorCornerRadius() {
          return mIndicatorCornerRadius;
      }
  
      public void setIndicatorCornerRadius(float indicatorCornerRadius) {
          this.mIndicatorCornerRadius = dp2px(indicatorCornerRadius);
          invalidate();
      }
  
      public float getIndicatorMarginLeft() {
          return mIndicatorMarginLeft;
      }
  
      public float getIndicatorMarginTop() {
          return mIndicatorMarginTop;
      }
  
      public float getIndicatorMarginRight() {
          return mIndicatorMarginRight;
      }
  
      public float getIndicatorMarginBottom() {
          return mIndicatorMarginBottom;
      }
  
      public int getUnderlineColor() {
          return mUnderlineColor;
      }
  
      public void setUnderlineColor(int underlineColor) {
          this.mUnderlineColor = underlineColor;
          invalidate();
      }
  
      public float getUnderlineHeight() {
          return mUnderlineHeight;
      }
  
      public void setUnderlineHeight(float underlineHeight) {
          this.mUnderlineHeight = dp2px(underlineHeight);
          invalidate();
      }
  
      public int getDividerColor() {
          return mDividerColor;
      }
  
      public void setDividerColor(int dividerColor) {
          this.mDividerColor = dividerColor;
          invalidate();
      }
  
      public float getDividerWidth() {
          return mDividerWidth;
      }
  
      public void setDividerWidth(float dividerWidth) {
          this.mDividerWidth = dp2px(dividerWidth);
          invalidate();
      }
  
      public float getDividerPadding() {
          return mDividerPadding;
      }
  
      public void setDividerPadding(float dividerPadding) {
          this.mDividerPadding = dp2px(dividerPadding);
          invalidate();
      }
  
      public float getTextsize() {
          return mTextsize;
      }
  
      public void setTextsize(float textsize) {
          this.mTextsize = sp2px(textsize);
          updateTabStyles();
      }
  
      public int getTextSelectColor() {
          return mTextSelectColor;
      }
  
      public void setTextSelectColor(int textSelectColor) {
          this.mTextSelectColor = textSelectColor;
          updateTabStyles();
      }
  
      public int getTextUnselectColor() {
          return mTextUnselectColor;
      }
  
      public void setTextUnselectColor(int textUnselectColor) {
          this.mTextUnselectColor = textUnselectColor;
          updateTabStyles();
      }
  
      public int getTextBold() {
          return mTextBold;
      }
  
      public void setTextBold(int textBold) {
          this.mTextBold = textBold;
          updateTabStyles();
      }
  
      public boolean isTextAllCaps() {
          return mTextAllCaps;
      }
  
      public void setTextAllCaps(boolean textAllCaps) {
          this.mTextAllCaps = textAllCaps;
          updateTabStyles();
      }
  
      //setter and getter
  
      public View getItemView(int tab) {
          return mTabsContainer.getChildAt(tab);
      }
  
      public TextView getTitleView(int tab) {
          return (TextView) getItemView(tab).findViewById(R.id.tv_tab_title);
      }
  
      public ImageView getImageView(int tab) {
          return (ImageView) getItemView(tab).findViewById(R.id.tv_tab_image);
      }
  
      /**
       * 显示未读消息
       *
       * @param position 显示tab位置
       * @param num num小于等于0显示红点,num大于0显示数字
       */
      public void showMsg(int position, int num) {
          if (position >= mTabCount) {
              position = mTabCount - 1;
          }
  
          View tabView = mTabsContainer.getChildAt(position);
          TextViewWithBackground tipView = (TextViewWithBackground) tabView.findViewById(R.id.rtv_msg_tip);
          if (tipView != null) {
              UnreadMsgUtils.show(tipView, num);
  
              if (mInitSetMap.get(position) != null && mInitSetMap.get(position)) {
                  return;
              }
  
              setMsgMargin(position, 4, 2);
              mInitSetMap.put(position, true);
          }
      }
  
      /**
       * 显示未读红点
       *
       * @param position 显示tab位置
       */
      public void showDot(int position) {
          if (position >= mTabCount) {
              position = mTabCount - 1;
          }
          showMsg(position, 0);
      }
  
      /**
       * 隐藏未读消息
       */
      public void hideMsg(int position) {
          if (position >= mTabCount) {
              position = mTabCount - 1;
          }
  
          View tabView = mTabsContainer.getChildAt(position);
          TextViewWithBackground tipView = (TextViewWithBackground) tabView.findViewById(R.id.rtv_msg_tip);
          if (tipView != null) {
              tipView.setVisibility(View.GONE);
          }
      }
  
      /**
       * 设置未读消息偏移,原点为文字的右上角.当控件高度固定,消息提示位置易控制,显示效果佳
       */
      public void setMsgMargin(int position, float leftPadding, float bottomPadding) {
          if (position >= mTabCount) {
              position = mTabCount - 1;
          }
          View tabView = mTabsContainer.getChildAt(position);
          TextViewWithBackground tipView = (TextViewWithBackground) tabView.findViewById(R.id.rtv_msg_tip);
          if (tipView != null) {
              TextView tv_tab_title = (TextView) tabView.findViewById(R.id.tv_tab_title);
              mTextPaint.setTextSize(mTextsize);
              float textWidth = mTextPaint.measureText(tv_tab_title.getText().toString());
              float textHeight = mTextPaint.descent() - mTextPaint.ascent();
              MarginLayoutParams lp = (MarginLayoutParams) tipView.getLayoutParams();
              lp.leftMargin = mTabWidth >= 0 ? (int) (mTabWidth / 2 + textWidth / 2 + dp2px(leftPadding))
                      : (int) (mTabPadding + textWidth + dp2px(leftPadding));
              lp.topMargin = mHeight > 0 ? (int) (mHeight - textHeight) / 2 - dp2px(bottomPadding) : 0;
              tipView.setLayoutParams(lp);
          }
      }
  
      /**
       * 当前类只提供了少许设置未读消息属性的方法,可以通过该方法获取MsgView对象从而各种设置
       */
      public TextViewWithBackground getMsgView(int position) {
          if (position >= mTabCount) {
              position = mTabCount - 1;
          }
          View tabView = mTabsContainer.getChildAt(position);
          TextViewWithBackground tipView = (TextViewWithBackground) tabView.findViewById(R.id.rtv_msg_tip);
          return tipView;
      }
  
      public void setOnTabSelectListener(OnTabSelectListener listener) {
          this.mListener = listener;
      }
  
      @Override
      protected Parcelable onSaveInstanceState() {
          Bundle bundle = new Bundle();
          bundle.putParcelable("instanceState", super.onSaveInstanceState());
          bundle.putInt("mCurrentTab", mCurrentTab);
          return bundle;
      }
  
      @Override
      protected void onRestoreInstanceState(Parcelable state) {
          if (state instanceof Bundle) {
              Bundle bundle = (Bundle) state;
              mCurrentTab = bundle.getInt("mCurrentTab");
              state = bundle.getParcelable("instanceState");
              if (mCurrentTab != 0 && mTabsContainer.getChildCount() > 0) {
                  updateTabSelection(mCurrentTab);
                  scrollToCurrentTab();
              }
          }
          super.onRestoreInstanceState(state);
      }
  
      protected int dp2px(float dp) {
          final float scale = mContext.getResources().getDisplayMetrics().density;
          return (int) (dp * scale + 0.5f);
      }
  
      protected int sp2px(float sp) {
          final float scale = this.mContext.getResources().getDisplayMetrics().scaledDensity;
          return (int) (sp * scale + 0.5f);
      }
  
      class InnerPagerAdapter extends FragmentPagerAdapter {
  
          private ArrayList<Fragment> fragments = new ArrayList<>();
          private String[] titles;
  
          public InnerPagerAdapter(FragmentManager fm, ArrayList<Fragment> fragments, String[] titles) {
              super(fm);
              this.fragments = fragments;
              this.titles = titles;
          }
  
          @Override
          public int getCount() {
              return fragments.size();
          }
  
          @Override
          public CharSequence getPageTitle(int position) {
              return titles[position];
          }
  
          @Override
          public Fragment getItem(int position) {
              return fragments.get(position);
          }
  
          @Override
          public void destroyItem(ViewGroup container, int position, Object object) {
              // 覆写destroyItem并且空实现,这样每个Fragment中的视图就不会被销毁
              // super.destroyItem(container, position, object);
          }
  
          @Override
          public int getItemPosition(Object object) {
              return PagerAdapter.POSITION_NONE;
          }
      }
  }
  