简单仿TabLayout实现个性化Tab，让Tab展现多样化

package com.goach.tabdemo.view; import android.content.Context; import android.content.res.ColorStateList; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Rect; import android.graphics.Typeface; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewCompat; import android.support.v4.view.ViewPager; import android.util.AttributeSet; import android.util.Log; import android.util.SparseArray; import android.util.SparseBooleanArray; import android.util.SparseIntArray; import android.util.TypedValue; import android.view.Gravity; import android.view.View; import android.view.ViewTreeObserver; import android.widget.HorizontalScrollView; import android.widget.LinearLayout; import android.widget.TextView; import com.goach.tabdemo.R; import com.goach.tabdemo.util.AppUtils; import java.util.ArrayList; import java.util.List; /** * Created by 钟光新 on 2016/9/24 0024. * 1. */ public class ZTabLayout extends HorizontalScrollView { //默认字体大小 private final int DEFAULT_NORMAL_TEXT_SIZE_SP = AppUtils.sp2px(14); private int mNormalTextSize = DEFAULT_NORMAL_TEXT_SIZE_SP; //选中字体大小 private final int DEFAULT_SELECT_TEXT_SIZE_SP = AppUtils.sp2px(16); private int mSelectTextSize = DEFAULT_SELECT_TEXT_SIZE_SP; //字体颜色 private final int DEFAULT_NORMAL_TEXT_COLOR = Color.BLACK; private final int DEFAULT_SELECT_TEXT_COLOR = Color.RED; private ColorStateList mTextColor; //指示器高度 private final int DEFAULT_INDICATOR_HEIGHT_DP = AppUtils.dp2px(2); private int mIndicatorHeight = DEFAULT_INDICATOR_HEIGHT_DP ; //指示器颜色 private final int DEFAULT_INDICATOR_COLOR = Color.RED; private int mIndicatorColor = DEFAULT_INDICATOR_COLOR ; //tab最小宽度 private final int DEFAULT_TAB_MIN_WIDTH = AppUtils.dp2px(50); private int mMinTabWidth = DEFAULT_TAB_MIN_WIDTH; //tab之间的间距 private int mTabPadding; //关联的viewpager private ViewPager mViewPager; //第一个子View private IndicationTabLayout mTabContainer; //Tab总数 private int mTabCount; //当前选中的Tab private int mCurrentTabPosition; //当前切换Tab的偏移量 private float mCurrentOffset; //数据源 private List<String> mDataList; //中间线 private final int DEFAULT_DIVIDER_WIDTH =AppUtils.dp2px(1); private int mDividerWidth = DEFAULT_DIVIDER_WIDTH; private final int DEFAULT_DIVIDER_COLOR = Color.GRAY; private int mDividerColor = DEFAULT_DIVIDER_COLOR; private Paint mDividerPaint; private int DEFAULT_DIVIDER_PADDING = AppUtils.dp2px(5); private int mDividerPadding = DEFAULT_DIVIDER_PADDING ; private boolean hasShowDivider = false ; //红点显示 private final int DEFAULT_MSG_ROUND_COLOR = Color.RED; private int mMsgRoundColor = DEFAULT_MSG_ROUND_COLOR; private SparseBooleanArray mInitSetMap ; private SparseIntArray mMsgNumMap; private Paint mMsgPaint; private Paint mMsgNumPaint; private int mMsgNumColor = Color.WHITE; private int mMsgTextSizeSp = AppUtils.sp2px(8); private int mMsgPadding; public ZTabLayout(Context context) { this(context,null); } public ZTabLayout(Context context, AttributeSet attrs) { this(context, attrs,0); } public ZTabLayout(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initStyle(context,attrs); setFillViewport(true); setHorizontalScrollBarEnabled(false); mTabContainer = new IndicationTabLayout(context); mTabContainer.setSelectedIndicatorColor(mIndicatorColor); mTabContainer.setSelectedIndicatorHeight(mIndicatorHeight); addView(mTabContainer,0, new HorizontalScrollView.LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT)); mDataList = new ArrayList<>(); mDividerPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mMsgPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mMsgNumPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mInitSetMap = new SparseBooleanArray(); mMsgNumMap = new SparseIntArray(); } private void initStyle(Context context, AttributeSet attrs){ TypedArray typedArray = context.getTheme().obtainStyledAttributes(attrs,R.styleable.ZTabLayout,0,0); mNormalTextSize = typedArray.getDimensionPixelSize(R.styleable.ZTabLayout_tab_normal_textSize,DEFAULT_NORMAL_TEXT_SIZE_SP); mSelectTextSize = typedArray.getDimensionPixelSize(R.styleable.ZTabLayout_tab_select_textSize,DEFAULT_SELECT_TEXT_SIZE_SP); mTextColor = typedArray.getColorStateList(R.styleable.ZTabLayout_tab_textColor); if(mTextColor==null) mTextColor = createDefaultTextColor(); mIndicatorHeight = (int) typedArray.getDimension(R.styleable.ZTabLayout_tab_indicatorHeight,DEFAULT_INDICATOR_HEIGHT_DP); mIndicatorColor = typedArray.getColor(R.styleable.ZTabLayout_tab_indicatorColor,DEFAULT_INDICATOR_COLOR); mMinTabWidth = typedArray.getColor(R.styleable.ZTabLayout_tab_min_width,DEFAULT_TAB_MIN_WIDTH); mDividerColor = typedArray.getColor(R.styleable.ZTabLayout_tab_dividerColor,DEFAULT_DIVIDER_COLOR); mDividerWidth = (int) typedArray.getDimension(R.styleable.ZTabLayout_tab_dividerWidth,DEFAULT_DIVIDER_WIDTH); mDividerPadding = (int) typedArray.getDimension(R.styleable.ZTabLayout_tab_dividerPadding,DEFAULT_DIVIDER_PADDING); mTabPadding = (int) typedArray.getDimension(R.styleable.ZTabLayout_tab_Padding,0); hasShowDivider = typedArray.getBoolean(R.styleable.ZTabLayout_tab_dividerShow,false); typedArray.recycle(); } private ColorStateList createDefaultTextColor(){ ColorStateList colorStateList = new ColorStateList(new int[][]{{android.R.attr.state_selected} ,{0}}, new int[]{DEFAULT_SELECT_TEXT_COLOR,DEFAULT_NORMAL_TEXT_COLOR}); return colorStateList; } public void setDataList(List<String> dataList){ this.mDataList.clear(); this.mDataList.addAll(dataList); } public void setupWithViewPager(ViewPager viewPager){ this.mViewPager = viewPager ; if(viewPager == null) throw new IllegalArgumentException("viewpager not is null"); PagerAdapter pagerAdapter = viewPager.getAdapter() ; if(pagerAdapter == null) throw new IllegalArgumentException("pagerAdapter not is null"); this.mViewPager.addOnPageChangeListener(new TabPagerChanger()); mTabCount = pagerAdapter.getCount(); mCurrentTabPosition = viewPager.getCurrentItem(); notifyDataSetChanged(); } public void notifyDataSetChanged(){ mTabContainer.removeAllViews(); for (int i = 0 ; i<mTabCount;i++) { final int currentPosition = i ; TextView tabTextView = createTextView() ; tabTextView.setPadding(mTabPadding,0,mTabPadding,0); tabTextView.setText(mDataList.get(i)); tabTextView.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { mViewPager.setCurrentItem(currentPosition); } }); mTabContainer.addView(tabTextView,new LinearLayout.LayoutParams(0,LinearLayout.LayoutParams.MATCH_PARENT,1)); } setSelectedTabView(mCurrentTabPosition); } private TextView createTextView(){ TextView textView = new TextView(getContext()); textView.setTextSize(TypedValue.COMPLEX_UNIT_PX,mNormalTextSize); textView.setTextColor(mTextColor