使用RecyclerView做的轮播图
之前做的轮播图，对于十几个图片什么的能够满足，但是万一有几千张，几万张就容易造成内存泄露，使用RecyclerView做的轮播，可以利用它自身的复用机制，比较节省内存。所以这种方式感觉效果更好。
1. 指示器Indicator相关属性前缀同一为“indicator”。
2. 增加几个Indicator的相关属性：
rvb_indicatorSize：单个Indicator元素的方形区域尺寸；
rvb_indicatorSpace：两个Indicator元素的间距；
rvb_indicatorMargin：Indicator距离外边框的间距；
rvb_indicatorGravity：Indicator在广告栏内底部的相对位置。
rvb_autoPlaying：是否自动滚动，true自动滚动，false停止自动滚动
3. 将BannerView和IndicatorView的ImageView替换为AppCompatImageView，这样在Fragment中也可使用Compat属性，如使用svg矢量图等。
4. 可通过xml自由配置选中和未选中状态的资源，支持color, shape, png, svg，相当灵活。
5. lib的build.gradle中改compile为provided，这样当app的build.gradle中的版本低于lib也不会报错。
注意：SnapHelper是support-compat:24.2.0才引入的，compile的编译版本必须高于24.2.0才可以(是编译版本高于24.2.0，兼容其以下版本的，都可以使用，大家别理解错。)
Add it in your root build.gradle at the end of repositories:
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
} dependencies {
implementation 'com.github.loonggg:RecyclerViewBanner:v1.2.3'
}- rvb_indicatorSelectedSrc 设置底部导航指示器或者点选中的样式
- rvb_indicatorUnselectedSrc 设置底部导航指示器或者点未选中状态的样式
- rvb_interval 设置轮播图滚动间隔时间
- rvb_showIndicator 设置是否显示底部指示导航小圆点
- rvb_indicatorSize 设置指示器的大小
- rvb_indicatorSpace 设置轮播指示器的间隔
- rvb_indicatorMargin 设置轮播指示器Indicator距离外边框的间距
- rvb_indicatorGravity 设置底部轮播导航指示器的位置 [left，center，right]
- rvb_autoPlaying：是否自动滚动，true自动滚动，false禁止自动滚动
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
android:id="@+id/activity_main"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:loonggg="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.loonggg.rvbanner.MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<com.loonggg.rvbanner.lib.RecyclerViewBanner
android:id="@+id/rv_banner_1"
android:layout_width="match_parent"
android:layout_height="140dp"
tools:background="@color/colorPrimaryDark"/>
<!--tools:background在编译运行时会被忽略，此处添加可以方便查看Indicator的状态-->
<com.loonggg.rvbanner.lib.RecyclerViewBanner
android:id="@+id/rv_banner_2"
android:layout_width="match_parent"
android:layout_height="140dp"
loonggg:rvb_indicatorSelectedSrc="@drawable/svg_ic_selected"
loonggg:rvb_indicatorUnselectedSrc="@drawable/svg_ic_unselected"
tools:background="@color/colorPrimaryDark"/>
<!--支持svg矢量图-->
<com.loonggg.rvbanner.lib.RecyclerViewBanner
android:id="@+id/rv_banner_3"
android:layout_width="match_parent"
android:layout_height="140dp"
loonggg:rvb_indicatorSelectedSrc="@drawable/shape_indicator_selected"
loonggg:rvb_indicatorUnselectedSrc="@drawable/shape_indicator_unselected"
tools:background="@color/colorPrimaryDark"/>
<com.loonggg.rvbanner.lib.RecyclerViewBanner
android:id="@+id/rv_banner_4"
android:layout_width="match_parent"
android:layout_height="140dp"
loonggg:rvb_indicatorGravity="left"
loonggg:rvb_indicatorSelectedSrc="@mipmap/ic_selected"
loonggg:rvb_indicatorUnselectedSrc="@mipmap/ic_unselected"
tools:background="@color/colorPrimaryDark"/>
<com.loonggg.rvbanner.lib.RecyclerViewBanner
android:id="@+id/rv_banner_5"
android:layout_width="match_parent"
android:layout_height="140dp"
loonggg:rvb_indicatorGravity="right"
loonggg:rvb_indicatorMargin="2dp"
loonggg:rvb_indicatorSelectedSrc="@color/colorPrimary"
loonggg:rvb_indicatorUnselectedSrc="#ffffff"
loonggg:rvb_indicatorSize="8dp"
loonggg:rvb_indicatorSpace="8dp"
loonggg:rvb_interval="2000"
tools:background="@color/colorPrimaryDark"/>
</LinearLayout>
</ScrollView>public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RecyclerViewBanner recyclerViewBanner1 = (RecyclerViewBanner) findViewById(R.id.rv_banner_1);
RecyclerViewBanner recyclerViewBanner2 = (RecyclerViewBanner) findViewById(R.id.rv_banner_2);
RecyclerViewBanner recyclerViewBanner3 = (RecyclerViewBanner) findViewById(R.id.rv_banner_3);
RecyclerViewBanner recyclerViewBanner4 = (RecyclerViewBanner) findViewById(R.id.rv_banner_4);
RecyclerViewBanner recyclerViewBanner5 = (RecyclerViewBanner) findViewById(R.id.rv_banner_5);
final List<Banner> banners = new ArrayList<>();
banners.add(new Banner("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1487221110004&di=d6043e4b0c90ddf3ea5096c3d8eb8f58&imgtype=0&src=http%3A%2F%2Fimage.tianjimedia.com%2FuploadImages%2F2014%2F067%2F5116EPAUD762_1000x500.jpg"));
banners.add(new Banner("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1487221129421&di=c085432cf7c15836f8a6479138740f39&imgtype=0&src=http%3A%2F%2Fimage85.360doc.com%2FDownloadImg%2F2015%2F05%2F0517%2F53199602_2.jpg"));
banners.add(new Banner("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1490438881557&di=e61065ccc8d7b44591e1c4ba8df672ee&imgtype=0&src=http%3A%2F%2Fc.hiphotos.baidu.com%2Fzhidao%2Fpic%2Fitem%2F18d8bc3eb13533fa00428309a0d3fd1f41345b24.jpg"));
banners.add(new Banner("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1490440243430&di=6f8d7c608a4e3fbe4130c93fc0f20850&imgtype=0&src=http%3A%2F%2Fimg3.duitang.com%2Fuploads%2Fitem%2F201509%2F09%2F20150909184342_mkrWc.jpeg"));
banners.add(new Banner("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1490440556037&di=ade75ba29126922124b063a2a57873f7&imgtype=0&src=http%3A%2F%2Fi2.download.fd.pchome.net%2Ft_960x600%2Fg1%2FM00%2F0E%2F05%2FooYBAFTbGOmIDPSLAAXPs6l7AQMAACSVgDyBqkABc_L421.jpg"));
recyclerViewBanner1.setRvBannerData(banners);
recyclerViewBanner1.setOnSwitchRvBannerListener(new RecyclerViewBanner.OnSwitchRvBannerListener() {
@Override
public void switchBanner(int position, AppCompatImageView bannerView) {
Glide.with(bannerView.getContext())
.load(banners.get(position).getUrl())
.placeholder(R.mipmap.ic_launcher)
.into(bannerView);
}
});
recyclerViewBanner1.setOnRvBannerClickListener(new RecyclerViewBanner.OnRvBannerClickListener() {
@Override
public void onClick(int position) {
Toast.makeText(MainActivity.this, "position: " + position, Toast.LENGTH_SHORT).show();
}
});
recyclerViewBanner2.setRvBannerData(banners);
recyclerViewBanner2.setOnSwitchRvBannerListener(new RecyclerViewBanner.OnSwitchRvBannerListener() {
@Override
public void switchBanner(int position, AppCompatImageView bannerView) {
Glide.with(bannerView.getContext())
.load(banners.get(position).getUrl())
.placeholder(R.mipmap.ic_launcher)
.into(bannerView);
}
});
recyclerViewBanner3.setRvBannerData(banners);
recyclerViewBanner3.setOnSwitchRvBannerListener(new RecyclerViewBanner.OnSwitchRvBannerListener() {
@Override
public void switchBanner(int position, AppCompatImageView bannerView) {
Glide.with(bannerView.getContext())
.load(banners.get(position).getUrl())
.placeholder(R.mipmap.ic_launcher)
.into(bannerView);
}
});
recyclerViewBanner4.setIndicatorInterval(2000);
recyclerViewBanner4.setRvBannerData(banners);
recyclerViewBanner4.setOnSwitchRvBannerListener(new RecyclerViewBanner.OnSwitchRvBannerListener() {
@Override
public void switchBanner(int position, AppCompatImageView bannerView) {
Glide.with(bannerView.getContext())
.load(banners.get(position).getUrl())
.placeholder(R.mipmap.ic_launcher)
.into(bannerView);
}
});
recyclerViewBanner5.setRvBannerData(banners);
recyclerViewBanner5.setOnSwitchRvBannerListener(new RecyclerViewBanner.OnSwitchRvBannerListener() {
@Override
public void switchBanner(int position, AppCompatImageView bannerView) {
Glide.with(bannerView.getContext())
.load(banners.get(position).getUrl())
.placeholder(R.mipmap.ic_launcher)
.into(bannerView);
}
});
}
private class Banner {
String url;
public Banner(String url) {
this.url = url;
}
public String getUrl() {
return url;
}
}
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Copyright 2017 loonggg
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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