Android--自定义tab+viewPager

一个很常见的功能。收藏起来，以后用的肯定多！
先上图：

分割线和下划线字体都是可以很简单的更改！下面是一个viewPager,不说废话，直接上代码
PagerSlidingTabStrip 自定义类 实现tab

/* * Copyright (C) 2013 Andreas Stuetz <[e-mail]> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *      http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package com.example.tabdemo;import android.annotation.SuppressLint;import android.content.Context;import android.content.res.TypedArray;import android.graphics.Canvas;import android.graphics.Color;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;/**tab自定义类 * @author Administrator * */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 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 Typeface tabTypeface = null;    private int tabTypefaceStyle = Typeface.BOLD;    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() {            @SuppressWarnings("deprecation")            @SuppressLint("NewApi")            @Override            public void onGlobalLayout() {                if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {                    getViewTreeObserver().removeGlobalOnLayoutListener(this);                } else {                    getViewTreeObserver().removeOnGlobalLayoutListener(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));                    }                }            }        }    }    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 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 underline        rectPaint.setColor(underlineColor);        canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), 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);            }            //设置下面横线            setIndicatorColor(Color.RED);            //设置分割线的颜色            setDividerColor(Color.BLUE);        }        @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) {            if (delegatePageListener != null) {                delegatePageListener.onPageSelected(position);            }        }    }    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;        requestLayout();    }    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 setTypeface(Typeface typeface, int style) {        this.tabTypeface = typeface;        this.tabTypefaceStyle = style;        updateTabStyles();    }    public void setTabBackground(int resId) {        this.tabBackgroundResId = resId;    }    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 Creator<SavedState> CREATOR = new Creator<SavedState>() {            @Override            public SavedState createFromParcel(Parcel in) {                return new SavedState(in);            }            @Override            public SavedState[] newArray(int size) {                return new SavedState[size];            }        };    }}

MainActivity

package com.example.tabdemo;import java.util.ArrayList;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentActivity;import android.support.v4.app.FragmentPagerAdapter;import android.support.v4.view.ViewPager;import android.os.Bundle;import android.support.v4.app.FragmentManager;public class MainActivity extends FragmentActivity {     private ArrayList<Fragment> fragments;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);         ViewPager viewPager = (ViewPager) findViewById(R.id.viewPager);            PagerSlidingTabStrip tab = (PagerSlidingTabStrip) findViewById(R.id.tab);            fragments = new ArrayList<>();            fragments.add(new NormalFragment());            fragments.add(new DownloadFragment());            fragments.add(new UploadFragment());            viewPager.setAdapter(new MyAdapter(getSupportFragmentManager()));            //添加viewpager到tab            tab.setViewPager(viewPager);    }    private class MyAdapter extends FragmentPagerAdapter {        private String[] titles = {"一般请求", "下载管理", "上传管理"};        public MyAdapter(FragmentManager fm) {            super(fm);        }        @Override        public CharSequence getPageTitle(int position) {            return titles[position];        }        @Override        public Fragment getItem(int position) {            return fragments.get(position);        }        @Override        public int getCount() {            return fragments.size();        }    }}

activity_main.xml

<LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <com.example.tabdemo.PagerSlidingTabStrip        android:id="@+id/tab"        android:layout_width="match_parent"        android:layout_height="50dp"        app:pstsShouldExpand="true"/>    <android.support.v4.view.ViewPager        android:id="@+id/viewPager"        android:layout_width="match_parent"        android:layout_height="match_parent"/></LinearLayout>

drawable background_tab.xml

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android" android:exitFadeDuration="@android:integer/config_shortAnimTime">    <item android:state_pressed="true" android:drawable="@color/background_tab_pressed" />    <item android:state_focused="true" android:drawable="@color/background"/>    <item android:drawable="@android:color/transparent"/></selector>

attrs.xml

<?xml version="1.0" encoding="utf-8"?><resources>    <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>    <declare-styleable name="NumberProgressBar">        <attr name="progress_current" format="integer"/>        <attr name="progress_max" format="integer"/>        <attr name="progress_unreached_color" format="color"/>        <attr name="progress_reached_color" format="color"/>        <attr name="progress_reached_bar_height" format="dimension"/>        <attr name="progress_unreached_bar_height" format="dimension"/>        <attr name="progress_text_size" format="dimension"/>        <attr name="progress_text_color" format="color"/>        <attr name="progress_text_offset" format="dimension"/>        <attr name="progress_text_visibility" format="enum">            <enum name="visible" value="0"/>            <enum name="invisible" value="1"/>        </attr>    </declare-styleable>    <declare-styleable name="ProgressPieView">        <attr name="android:text"/>        <attr name="android:textSize"/>        <attr name="android:textColor"/>        <attr name="ppvProgress" format="integer"/>        <attr name="ppvMax" format="integer"/>        <attr name="ppvStartAngle" format="integer"/>        <attr name="ppvInverted" format="boolean"/>        <attr name="ppvCounterclockwise" format="boolean"/>        <attr name="ppvStrokeWidth" format="dimension"/>        <attr name="ppvBackgroundColor" format="reference|color"/>        <attr name="ppvProgressColor" format="reference|color"/>        <attr name="ppvStrokeColor" format="reference|color"/>        <attr name="ppvShowStroke" format="boolean"/>        <attr name="ppvShowText" format="boolean"/>        <attr name="ppvTypeface" format="string"/>        <attr name="ppvImage" format="reference"/>        <attr name="ppvProgressFillType" format="enum">            <enum name="radial" value="0"/>            <enum name="center" value="1"/>        </attr>    </declare-styleable></resources>

colors.xml

<?xml version="1.0" encoding="utf-8"?><resources>    <color name="background_tab_pressed">#6633B5E5</color>    <color name="colorPrimary">#3F51B5</color>    <color name="colorPrimaryDark">#303F9F</color>    <color name="colorAccent">#FF4081</color>    <color name="theme_body">#cc22292c</color>    <color name="black">#000000</color>    <color name="status_bar">#303135</color>    <color name="top_bar">#9f556061</color>    <color name="transparent">#00000000</color>    <color name="background">#060606</color></resources>

所有代码差不多就是这些，至于fragment那就自己定义了！纯属记录！每天记录一点，总会有所收获！