BannerViewPager

Additional

Language
Java
Version
2.5.1 (Nov 26, 2019)
Created
Mar 28, 2017
Updated
Nov 27, 2019
Owner
zhpanvip
Contributor
zhpanvip
1
Activity
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BannerViewPager

[

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效果预览

点击或扫描二维码下载apk

1.setPageStyle

一屏多页Demo

MULTI_PAGE MULTI_PAGE_SCALE MULTI_PAGE_OVERLAP

2.setIndicatorStyle

BannerViewPager支持多种IndicatorViewStyle,同时还提供了完全自定义IndicatorView的功能。只要继承BaseIndicatorView或者实现IIndicator接口,并重写相应方法,就可以为所欲为的打造任意的Indicator了。

IndicatorViewStyle Demo

CIRCLE DASH Custom

3.setIndicatorSlideMode

NORMAL SMOOTH

4.setPageTransformerStyle

TransformStyle Demo

参数 STACK ROTATE DEPTH ACCORDION
预览

开放API

方法名 方法描述 说明
BannerViewPager<T, VH> setCanLoop(boolean canLoop) 是否开启循环 默认值true
BannerViewPager<T, VH> setAutoPlay(boolean autoPlay) 是否开启自动轮播 默认值true
BannerViewPager<T, VH> setInterval(int interval) 自动轮播时间间隔 单位毫秒,默认值3000
BannerViewPager<T, VH> setScrollDuration(int scrollDuration) 设置页面滚动时间 设置页面滚动时间
BannerViewPager<T, VH> setRoundCorner(int radius) 设置圆角 默认无圆角 需要SDK_INT>=LOLLIPOP(API 21)
BannerViewPager<T, VH> setOnPageClickListener(OnPageClickListener onPageClickListener) 设置页面点击事件
BannerViewPager<T, VH> setHolderCreator(HolderCreator<VH> holderCreator) 设置HolderCreator 必须设置HolderCreator,否则会抛出NullPointerException
BannerViewPager<T, VH> setIndicatorVisibility(@Visibility int visibility) indicator vibility 默认值VISIBLE 2.4.2 新增
BannerViewPager<T, VH> setIndicatorStyle(int indicatorStyle) 设置指示器样式 可选枚举(CIRCLE, DASH) 默认CIRCLE
BannerViewPager<T, VH> setIndicatorGravity(int gravity) 指示器位置 可选值(CENTER、START、END)默认值CENTER
BannerViewPager<T, VH> setIndicatorColor(int normalColor,int checkedColor) 指示器圆点颜色 normalColor:未选中时颜色默认"#8C6C6D72", checkedColor:选中时颜色 默认"#8C18171C"
BannerViewPager<T, VH> setIndicatorSlideMode(int slideMode) 设置Indicator滑动模式 可选(NORMAL、SMOOTH),默认值NORMAL
BannerViewPager<T, VH> setIndicatorRadius(int radius) 设置指示器圆点半径 默认值4dp
BannerViewPager<T, VH> setIndicatorRadius(int normalRadius,int checkRadius) 设置指示器圆点半径 normalRadius:未选中时半径 checkedRadius:选中时的半径,默认值4dp
BannerViewPager<T, VH> setIndicatorWidth(int indicatorWidth) 设置指示器宽度,如果是圆形指示器,则为直径 默认值8dp
BannerViewPager<T, VH> setIndicatorWidth(int normalWidth, int checkWidth) 设置指示器宽度,如果是圆形指示器,则为直径 默认值8dp
BannerViewPager<T, VH> setIndicatorHeight(int indicatorHeight) 设置指示器高度,仅在Indicator样式为DASH时有效 默认值normalIndicatorWidth/2
BannerViewPager<T, VH> setIndicatorGap(int indicatorMargin) 指示器圆点间距 默认值为指示器宽度(或者是圆的直径)
BannerViewPager<T, VH> setIndicatorView(IIndicator indicatorView) 设置自定义指示器 自定义View需要继承BaseIndicatorView或实现IIndicator
BannerViewPager<T, VH> setPageTransformerStyle(int style) 设置页面Transformer内置样式
BannerViewPager<T, VH> setCurrentItem(int item) Set the currently selected page. 2.3.5新增
int getCurrentItem() 获取当前position 2.3.5新增
BannerViewPager<T, VH> setPageStyle(PageStyle pageStyle) 设置页面样式 2.4.0新增 可选(MULTI_PAGE、NORMAL)MULTI_PAGE:一屏多页样式
BannerViewPager<T, VH> setPageMargin(int pageMargin) 设置页面间隔 2.4.0新增
BannerViewPager<T, VH> setIndicatorMargin(int left, int top, int right, int bottom) 设置Indicator边距 2.4.1新增
BannerViewPager<T, VH> setOnPageChangeListener(OnPageChangeListener l) 页面改变的监听事件 2.4.3新增
void startLoop() 开启自动轮播 初始化BannerViewPager时不必调用该方法,设置setAutoPlay后会调用startLoop()
void stopLoop() 停止自动轮播 如果开启自动轮播,为避免内存泄漏需要在onStop()或onDestroy中调用此方法
List<T> getList() 获取Banner中的集合数据
void create(List list) 初始化并构造BannerViewPager 必须调用,否则前面设置的参数无效

xml支持的attrs

Attributes format description
bvp_interval integer 自动轮播时间间隔
bvp_scroll_duration integer 页面切换时滑动时间
bvp_can_loop boolean 是否循环
bvp_auto_play boolean 是否自动播放
bvp_indicator_checked_color color indicator选中时颜色
bvp_indicator_normal_color color indicator未选中时颜色
bvp_indicator_radius dimension indicator圆点半径或者Dash模式的1/2宽度
bvp_round_corner dimension Banner圆角大小
bvp_page_margin dimension 页面item间距
bvp_reveal_width dimension 一屏多页模式下两边item漏出的宽度
bvp_indicator_style enum indicator样式(circle/dash)
bvp_indicator_slide_mode enum indicator滑动模式(normal/smooth)
bvp_indicator_gravity enum indicator位置(center/start/end)
bvp_page_style enum page样式(normal/multi_page/multi_page_overlap/multi_page_scale)
bvp_transformer_style enum transform样式(normal/depth/stack/accordion)
bvp_indicator_visibility enum indicator visibility(visible/gone/invisible)

如何使用

1.gradle中添加依赖

如果您已迁移到AndroidX(2.5.1版本minSdkVersion支持到19),请在项目的root build.gradle中添加如下配置:

allprojects {
  repositories {
   ...
   maven { url 'https://jitpack.io' }
  }
 }
 

Add the dependency

implementation 'com.github.zhpanvip:BannerViewPager:latestVersion'

Androidx latestVersion:

如果未迁移到AndroidX请使用(2.5.1版本minSdkVersion支持到16):

implementation 'com.zhpan.library:bannerview:latestVersion'

非Androidx latestVersion:

2.在xml文件中添加如下代码:

    <com.zhpan.bannerview.BannerViewPager
            android:id="@+id/banner_view"
            android:layout_width="match_parent"
            android:layout_margin="10dp"
            android:layout_height="160dp" />

3.Banner的Item页面布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <ImageView
        android:id="@+id/banner_image"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="centerCrop" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:background="#66000000"
        android:gravity="center_vertical">

        <TextView
            android:id="@+id/tv_describe"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="center_vertical"
            android:layout_marginStart="15dp"
            android:gravity="center_vertical"
            android:paddingTop="5dp"
            android:paddingBottom="5dp"
            android:textColor="#FFFFFF"
            android:textSize="16sp" />
    </LinearLayout>

</RelativeLayout>

4.自定义ViewHolder

public class NetViewHolder implements ViewHolder<BannerData> {
    private ImageView mImageView;
    private TextView mTextView;

    @Override
    public View createView(ViewGroup viewGroup, Context context, int position) {
        View view = LayoutInflater.from(context).inflate(R.layout.item_net, viewGroup, false);
        mImageView = view.findViewById(R.id.banner_image);
        mTextView = view.findViewById(R.id.tv_describe);
        return view;
    }

    @Override
    public void onBind(Context context, BannerData data, int position, int size) {
        ImageLoaderOptions options = new ImageLoaderOptions.Builder().into(mImageView).load(data.getImagePath()).placeHolder(R.drawable.placeholder).build();
        ImageLoaderManager.getInstance().loadImage(options);
        mTextView.setText(data.getTitle());
    }
}

5.BannerViewPager参数配置

Kotlin示例:

    private lateinit var mViewPager: BannerViewPager<CustomBean, CustomPageViewHolder>
    
    private fun initViewPager() {
            mBannerViewPager = findViewById(R.id.bannerView)
            mBannerViewPager.setCanLoop(false)
                .setIndicatorSlideMode(IndicatorSlideMode.SMOOTH)
                .setIndicatorMargin(0, 0, 0, ConvertUtils.dp2px(40f))
                .setIndicatorGravity(IndicatorGravity.CENTER)
                .setHolderCreator { CustomPageViewHolder() }
                .setOnPageChangeListener(
                    object : OnPageChangeListenerAdapter() {
                        override fun onPageSelected(position: Int) {
                            pageSelect(position)
                        }
                    }
                )
                .create(res.toList())
        }

Java示例:

    private BannerViewPager<BannerData, NetViewHolder> mBannerViewPager;
    ...
 private void initViewPager() {
             mBannerViewPager = findViewById(R.id.banner_view);
             mBannerViewPager.showIndicator(true)
                .setInterval(3000)
                .setCanLoop(false)
                .setAutoPlay(true)
                .setRoundCorner(DpUtils.dp2px(7))
                .setIndicatorColor(Color.parseColor("#935656"), Color.parseColor("#FF4C39"))
                .setIndicatorGravity(IndicatorGravity.END)
                .setScrollDuration(1000).setHolderCreator(NetViewHolder::new)
                .setOnPageClickListener(position -> {
                    BannerData bannerData = mBannerViewPager.getList().get(position);
                    Toast.makeText(NetworkBannerActivity.this,
                            "点击了图片" + position + " " + bannerData.getDesc(), Toast.LENGTH_SHORT).show();

                }).create(mList);
        }

6.开启与停止轮播

2.5.0之后版本无需自行在Activity或Fragment中管理stopLoop和startLoop方法,但这两个方法依旧保留对外开放

如果开启了自动轮播功能,请务必在onDestroy中停止轮播,以免出现内存泄漏。

 @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mBannerViewPager != null)
      mViewpager.stopLoop();
    }

为了节省性能也可以在onStop中停止轮播,在onResume中开启轮播:

    @Override
    protected void onStop() {
        super.onStop();
        if (mBannerViewPager != null)
            mBannerViewPager.stopLoop();
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (mBannerViewPager != null)
            mBannerViewPager.startLoop();
    }

7.高级功能---自定义IndicatorView

在内置Indicator不满足需求时可以通过自定义IndicatorView实现。

(1)自定义View并继承BaseIndicatorView

public class FigureIndicatorView extends BaseIndicatorView {

    private int radius = DpUtils.dp2px(20);

    private int backgroundColor = Color.parseColor("#88FF5252");

    private int textColor = Color.WHITE;

    private int textSize=DpUtils.dp2px(13);

    public FigureIndicatorView(Context context) {
        this(context, null);
    }

    public FigureIndicatorView(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public FigureIndicatorView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        mPaint = new Paint();
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        setMeasuredDimension(2 * radius, 2 * radius);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        mPaint.setColor(backgroundColor);
        canvas.drawCircle(getWidth() / 2, getHeight() / 2, radius, mPaint);
        mPaint.setColor(textColor);
        mPaint.setTextSize(textSize);
        String text = currentPosition + 1 + "/" + pageSize;
        int textWidth = (int) mPaint.measureText(text);
        Paint.FontMetricsInt fontMetricsInt = mPaint.getFontMetricsInt();
        int baseline = (getMeasuredHeight() - fontMetricsInt.bottom + fontMetricsInt.top) / 2 - fontMetricsInt.top;
        canvas.drawText(text, (getWidth() - textWidth) / 2, baseline, mPaint);
    }

    public void setRadius(int radius) {
        this.radius = radius;
    }

    @Override
    public void setBackgroundColor(@ColorInt int backgroundColor) {
        this.backgroundColor = backgroundColor;
    }

    public void setTextSize(int textSize) {
        this.textSize = textSize;
    }

    public void setTextColor(int textColor) {
        this.textColor = textColor;
    }
}

(2)设置自定义指示器

    FigureIndicatorView indicatorView = new FigureIndicatorView(mContext);
    indicatorView.setRadius(BannerUtils.dp2px(18));
    indicatorView.setTextSize(BannerUtils.dp2px(13));
    indicatorView.setBackgroundColor(Color.parseColor("#aa118EEA"));

    mViewPager.setIndicatorGravity(IndicatorGravity.END)
              .setIndicatorView(indicatorView)
              .setHolderCreator(() -> new ImageResourceViewHolder(0))
              .create(mDrawableList);

TODO 版本计划

  • 优化及重构IndicatorView(2.0.1)

  • 修复2.1.0以前版本循环滑动时第一张切换卡顿问题(2.1.0.1)

  • 增加页面滑动动画(2.1.2)

  • 迁移AndroidX(2.2.0)

  • 增加IndicatorView的滑动样式(2.2.2)

  • 增添更多Indicator样式(2.3.+)

  • 支持一屏显示多页 (2.4.0)

  • v2.4.3版本着重优化提升性能

  • 重构Indicator,尽量修复Indicator SMOOTH模式下滑动问题

  • 目前Indicator部分代码比较乱,还有很大很大的优化空间,后续版本将持续优化(2.5.0对Indicator再次进行了重构,重构后代码已经很整洁,但仍然有优化空间)

  • ViewPager更换为ViewPager2 (3.0.0)

有问题可以扫码加QQ群交流

更多详情请参看以下链接

《打造一个丝滑般自动轮播无限循环Android库》

《BannerViewPager源码解析》

《剖析BannerViewPager中Indicator的设计思想》

感谢

banner

Android-ConvenientBanner

ViewPagerTransforms

玩Android

License

Copyright 2019 zhpanvip

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.