├── .gitignore ├── LICENSE ├── README.md ├── README_cn.md ├── app ├── build.gradle ├── proguard-rules.pro └── src │ └── main │ ├── AndroidManifest.xml │ ├── java │ └── com │ │ └── infinitebanner │ │ ├── BannerAdapter.java │ │ └── MainActivity.java │ └── res │ ├── drawable-xxhdpi │ ├── img_0.jpg │ ├── img_1.jpg │ └── img_2.jpg │ ├── layout │ └── activity_main.xml │ └── values │ ├── colors.xml │ ├── strings.xml │ └── styles.xml ├── build.gradle ├── gif └── demo.gif ├── gradle.properties ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── library ├── build.gradle ├── proguard-rules.pro └── src │ └── main │ ├── AndroidManifest.xml │ ├── java │ └── com │ │ └── github │ │ └── infinitebanner │ │ ├── AbsBannerAdapter.java │ │ └── InfiniteBannerView.java │ └── res │ └── values │ ├── attrs.xml │ └── strings.xml └── settings.gradle /.gitignore: -------------------------------------------------------------------------------- 1 | *.iml 2 | *.apk 3 | *.ap_ 4 | *.dex 5 | *.class 6 | *.log 7 | .gradle 8 | /bin 9 | /gen 10 | /local.properties 11 | /.idea 12 | /build 13 | .DS_Store 14 | /captures 15 | /app/build 16 | /library/build -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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Meanwhile, it not only solves the problem that ViewPager cannot scroll infinitely, but also reuses its child views so that less memory will be token while scrolling. 10 | 11 | ![demo-gif](https://github.com/Marksss/InfiniteBanner/blob/master/gif/demo.gif) 12 | ## Usage 13 | ### Add the dependency to your project `build.gradle` file 14 | ``` implementation 'com.github.Marksss:InfiniteBanner:v1.2' ``` 15 | ### Code in XML 16 | ``` 17 | 21 | ``` 22 | If you want it to scroll automatically, just set bannerAutoScroll true. Some other attributes that may be used: 23 | - bannerDividerWidth：distance between child views; 24 | - bannerInitialPage：the initial position after refreshing; 25 | - bannerForegroundWidthPercent：the width of child view that in the middle of container / the container's width（The default value is 1, which means that only one child view can be seen when scolling stops）; 26 | - bannerLoopInterval：time interval（millisecond）; 27 | - bannerManuallyScrollLock：if manual scrolling is allowed; 28 | - bannerScrollReverse：reverse scrolling automatically. 29 | 30 | ### Code in Java 31 | 32 | Create your own BannerAdapter： 33 | ``` 34 | public class MyBannerAdapter extends AbsBannerAdapter { 35 | @Override 36 | public int getCount() { 37 | //total count 38 | ... 39 | } 40 | 41 | @Override 42 | protected View makeView(InfiniteBannerView parent) { 43 | // create child view if needed 44 | ... 45 | } 46 | 47 | @Override 48 | protected void bind(View view, int position) { 49 | // bind view and data together and show whatever needed 50 | ... 51 | } 52 | } 53 | ``` 54 | ``` 55 | infiniteBannerView.setAdapter(new MyBannerAdapter()); 56 | ``` 57 | When you need to refresh your data： 58 | 59 | ``` 60 | myBannerAdapter.notifyDataSetChanged() 61 | ``` 62 | 63 | ### Click listener 64 | ``` 65 | infiniteBannerView.setOnItemClickListener(new InfiniteBannerView.OnItemClickListener() { 66 | @Override 67 | public void click(InfiniteBannerView view, int position) { 68 | ... 69 | } 70 | }); 71 | ``` 72 | 73 | ### Animation 74 | Similar to ViewPager，you just need to add transformer： 75 | ``` 76 | infiniteBannerView.setPageTransformer(new InfiniteBannerView.PageTransformer() { 77 | @Override 78 | public void transformPage(@NonNull View view, float offset) { 79 | ... 80 | } 81 | }); 82 | ``` 83 | 84 | ### Indicator 85 | There is no any indicators in this library. If you need one, you can add whatever indicator you want as follows（indicator in demo is another open source library [PageIndicatorView](https://github.com/romandanylyk/PageIndicatorView "PageIndicatorView")）： 86 | ``` 87 | infiniteBannerView_1.addOnPageChangeListener(new InfiniteBannerView.OnPageChangeListener() { 88 | @Override 89 | public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { 90 | ... 91 | } 92 | 93 | @Override 94 | public void onPageSelected(int position) { 95 | ... 96 | } 97 | }); 98 | ``` 99 | ## License 100 | InfiniteBanner is released under the [Apache License Version 2.0](LICENSE). 101 | -------------------------------------------------------------------------------- /README_cn.md: -------------------------------------------------------------------------------- 1 | [English](README.md) | 中文文档 2 | 3 | # InfiniteBanner 4 | [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0) 5 | [![Platform](https://img.shields.io/badge/platform-android-green.svg)](http://developer.android.com/index.html) 6 | [![API](https://img.shields.io/badge/API-14%2B-brightgreen.svg?style=flat)](https://android-arsenal.com/api?level=14) 7 | [![](https://jitpack.io/v/Marksss/InfiniteBanner.svg)](https://jitpack.io/#Marksss/InfiniteBanner) 8 | 9 | InfiniteBanner是一个能够无限轮播的banner，它的用法简单而且与ViewPager非常类似，但它也解决了ViewPager无法无限轮播的痛点。同时，它的内部是以子控件复用的形式实现，在无限轮播的同时并不会消耗过多的内存。 10 | 11 | ![demo-gif](https://github.com/Marksss/InfiniteBanner/blob/master/gif/demo.gif) 12 | ## 用法 13 | ### 将以下依赖添加到 `build.gradle` 文件中 14 | ``` implementation 'com.github.Marksss:InfiniteBanner:v1.2' ``` 15 | ### XML中的代码 16 | ``` 17 | 21 | ``` 22 | 如果想让banner自动开启轮播，只需将bannerAutoScroll设置为true即可。其他可能会用到的属性值如下： 23 | - bannerDividerWidth：每个子View之间的间隔距离； 24 | - bannerInitialPage：每次刷新后的起始位置； 25 | - bannerForegroundWidthPercent：居中显示的子View的宽度占容器总宽度的比值（默认是1，即静止的时候只能看到一个子View）； 26 | - bannerLoopInterval：自动轮播的时间间隔（微秒）； 27 | - bannerManuallyScrollLock：是否静止手划操作； 28 | - bannerScrollReverse：是否反向轮播。 29 | 30 | ### Java中的代码 31 | 实现自己的BannerAdapter： 32 | ``` 33 | public class MyBannerAdapter extends AbsBannerAdapter { 34 | @Override 35 | public int getCount() { 36 | //总数 37 | ... 38 | } 39 | 40 | @Override 41 | protected View makeView(InfiniteBannerView parent) { 42 | // 创建子view 43 | ... 44 | } 45 | 46 | @Override 47 | protected void bind(View view, int position) { 48 | // 子view与数据绑定并展示相应内容 49 | ... 50 | } 51 | } 52 | ``` 53 | ``` 54 | infiniteBannerView.setAdapter(new MyBannerAdapter()); 55 | ``` 56 | 当需要刷新数据时： 57 | 58 | ``` 59 | myBannerAdapter.notifyDataSetChanged() 60 | ``` 61 | 62 | ### 点击事件 63 | ``` 64 | infiniteBannerView.setOnItemClickListener(new InfiniteBannerView.OnItemClickListener() { 65 | @Override 66 | public void click(InfiniteBannerView view, int position) { 67 | ... 68 | } 69 | }); 70 | ``` 71 | 72 | ### 动画效果 73 | 和ViewPager类似，只要添加transformer即可： 74 | ``` 75 | infiniteBannerView.setPageTransformer(new InfiniteBannerView.PageTransformer() { 76 | @Override 77 | public void transformPage(@NonNull View view, float offset) { 78 | ... 79 | } 80 | }); 81 | ``` 82 | 83 | ### 指示器 84 | 本库中并没有添加任何indicator，如果想加indicator，可以用如下类似ViewPager的方式很轻松地添加自己喜欢的indicator（Demo中的indicator是一个开源库[PageIndicatorView](https://github.com/romandanylyk/PageIndicatorView "PageIndicatorView")）： 85 | ``` 86 | infiniteBannerView_1.addOnPageChangeListener(new InfiniteBannerView.OnPageChangeListener() { 87 | @Override 88 | public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { 89 | ... 90 | } 91 | 92 | @Override 93 | public void onPageSelected(int position) { 94 | ... 95 | } 96 | }); 97 | ``` 98 | 99 | ## 许可证 100 | InfiniteBanner基于 [Apache License Version 2.0](LICENSE) 发布。 -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | android { 4 | compileSdkVersion 30 5 | defaultConfig { 6 | applicationId "com.infinitebanner" 7 | minSdkVersion 15 8 | targetSdkVersion 30 9 | versionCode 11 10 | versionName "1.1" 11 | testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" 12 | } 13 | buildTypes { 14 | release { 15 | minifyEnabled false 16 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' 17 | } 18 | } 19 | } 20 | 21 | dependencies { 22 | implementation fileTree(dir: 'libs', include: ['*.jar']) 23 | implementation 'androidx.appcompat:appcompat:1.0.0' 24 | implementation 'androidx.constraintlayout:constraintlayout:1.1.3' 25 | implementation 'com.romandanylyk:pageindicatorview:1.0.3' 26 | implementation 'com.github.Marksss:InfiniteBanner:v1.2' 27 | // implementation project(':library') 28 | } 29 | -------------------------------------------------------------------------------- /app/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # You can control the set of applied configuration files using the 3 | # proguardFiles setting in build.gradle. 4 | # 5 | # For more details, see 6 | # http://developer.android.com/guide/developing/tools/proguard.html 7 | 8 | # If your project uses WebView with JS, uncomment the following 9 | # and specify the fully qualified class name to the JavaScript interface 10 | # class: 11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 12 | # public *; 13 | #} 14 | 15 | # Uncomment this to preserve the line number information for 16 | # debugging stack traces. 17 | #-keepattributes SourceFile,LineNumberTable 18 | 19 | # If you keep the line number information, uncomment this to 20 | # hide the original source file name. 21 | #-renamesourcefileattribute SourceFile 22 | -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | -------------------------------------------------------------------------------- /app/src/main/java/com/infinitebanner/BannerAdapter.java: -------------------------------------------------------------------------------- 1 | package com.infinitebanner; 2 | 3 | import android.content.Context; 4 | import android.view.View; 5 | import android.view.ViewGroup; 6 | import android.widget.ImageView; 7 | 8 | import com.github.infinitebanner.AbsBannerAdapter; 9 | import com.github.infinitebanner.InfiniteBannerView; 10 | 11 | import java.util.ArrayList; 12 | import java.util.List; 13 | 14 | public class BannerAdapter extends AbsBannerAdapter { 15 | 16 | @Override 17 | public int getCount() { 18 | return 3; 19 | } 20 | 21 | @Override 22 | protected View makeView(InfiniteBannerView parent) { 23 | ImageView imageView = new ImageView(parent.getContext()); 24 | imageView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); 25 | imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); 26 | return imageView; 27 | } 28 | 29 | @Override 30 | protected void bind(View view, int position) { 31 | if (position == 0) { 32 | ((ImageView) view).setImageResource(R.drawable.img_0); 33 | } else if (position == 1) { 34 | ((ImageView) view).setImageResource(R.drawable.img_1); 35 | } else { 36 | ((ImageView) view).setImageResource(R.drawable.img_2); 37 | } 38 | } 39 | } 40 | -------------------------------------------------------------------------------- /app/src/main/java/com/infinitebanner/MainActivity.java: -------------------------------------------------------------------------------- 1 | package com.infinitebanner; 2 | 3 | import androidx.annotation.NonNull; 4 | import androidx.appcompat.app.AppCompatActivity; 5 | import android.os.Bundle; 6 | import android.view.View; 7 | import android.widget.Toast; 8 | 9 | import com.github.infinitebanner.InfiniteBannerView; 10 | import com.rd.PageIndicatorView; 11 | 12 | public class MainActivity extends AppCompatActivity { 13 | 14 | @Override 15 | protected void onCreate(Bundle savedInstanceState) { 16 | super.onCreate(savedInstanceState); 17 | setContentView(R.layout.activity_main); 18 | 19 | InfiniteBannerView infiniteBannerView_0 = findViewById(R.id.infinite_banner_0); 20 | infiniteBannerView_0.setAdapter(new BannerAdapter()); 21 | infiniteBannerView_0.setPageTransformer(new InfiniteBannerView.PageTransformer() { 22 | @Override 23 | public void transformPage(@NonNull View view, float offset) { 24 | view.setScaleY(0.8f + 0.2f * offset); 25 | view.setAlpha(0.5f + 0.5f * offset); 26 | } 27 | }); 28 | infiniteBannerView_0.setOnItemClickListener(new InfiniteBannerView.OnItemClickListener() { 29 | @Override 30 | public void click(InfiniteBannerView view, int position) { 31 | Toast.makeText(MainActivity.this, ""+position, Toast.LENGTH_SHORT).show(); 32 | } 33 | }); 34 | infiniteBannerView_0.setInitPosition(1); 35 | 36 | InfiniteBannerView infiniteBannerView_1 = findViewById(R.id.infinite_banner_1); 37 | infiniteBannerView_1.setAdapter(new BannerAdapter()); 38 | final PageIndicatorView pageIndicatorView = findViewById(R.id.pageIndicatorView); 39 | pageIndicatorView.setCount(3); 40 | infiniteBannerView_1.addOnPageChangeListener(new InfiniteBannerView.OnPageChangeListener() { 41 | @Override 42 | public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { 43 | 44 | } 45 | 46 | @Override 47 | public void onPageSelected(int position) { 48 | pageIndicatorView.setSelection(position); 49 | } 50 | }); 51 | } 52 | } 53 | -------------------------------------------------------------------------------- /app/src/main/res/drawable-xxhdpi/img_0.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Marksss/InfiniteBanner/e6e972a63aff21de236e67cbe3c4c3b8fc2ca0ca/app/src/main/res/drawable-xxhdpi/img_0.jpg -------------------------------------------------------------------------------- /app/src/main/res/drawable-xxhdpi/img_1.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Marksss/InfiniteBanner/e6e972a63aff21de236e67cbe3c4c3b8fc2ca0ca/app/src/main/res/drawable-xxhdpi/img_1.jpg -------------------------------------------------------------------------------- /app/src/main/res/drawable-xxhdpi/img_2.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Marksss/InfiniteBanner/e6e972a63aff21de236e67cbe3c4c3b8fc2ca0ca/app/src/main/res/drawable-xxhdpi/img_2.jpg -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 9 | 10 | 19 | 20 | 34 | 35 | 47 | 48 | -------------------------------------------------------------------------------- /app/src/main/res/values/colors.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | #008577 4 | #00574B 5 | #D81B60 6 | 7 | -------------------------------------------------------------------------------- /app/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | InfiniteBanner 3 | 4 | -------------------------------------------------------------------------------- /app/src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | // Top-level build file where you can add configuration options common to all sub-projects/modules. 2 | 3 | buildscript { 4 | repositories { 5 | google() 6 | jcenter() 7 | 8 | } 9 | dependencies { 10 | classpath 'com.android.tools.build:gradle:4.2.2' 11 | } 12 | } 13 | 14 | allprojects { 15 | repositories { 16 | mavenCentral() 17 | google() 18 | jcenter() 19 | maven { 20 | url "https://maven.aliyun.com/nexus/content/groups/public/" 21 | } 22 | maven { url 'https://jitpack.io' } 23 | } 24 | } 25 | 26 | task clean(type: Delete) { 27 | delete rootProject.buildDir 28 | } 29 | -------------------------------------------------------------------------------- /gif/demo.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Marksss/InfiniteBanner/e6e972a63aff21de236e67cbe3c4c3b8fc2ca0ca/gif/demo.gif -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | # Project-wide Gradle settings. 2 | # IDE (e.g. Android Studio) users: 3 | # Gradle settings configured through the IDE *will override* 4 | # any settings specified in this file. 5 | # For more details on how to configure your build environment visit 6 | # http://www.gradle.org/docs/current/userguide/build_environment.html 7 | # Specifies the JVM arguments used for the daemon process. 8 | # The setting is particularly useful for tweaking memory settings. 9 | android.enableJetifier=true 10 | android.useAndroidX=true 11 | org.gradle.jvmargs=-Xmx1536m 12 | # When configured, Gradle will run in incubating parallel mode. 13 | # This option should only be used with decoupled projects. More details, visit 14 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects 15 | # org.gradle.parallel=true 16 | 17 | #systemProp.https.proxyHost=127.0.0.1 18 | #systemProp.https.proxyPort=1092 19 | #systemProp.http.proxyHost=127.0.0.1 20 | #systemProp.http.proxyPort=1092 21 | 22 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Marksss/InfiniteBanner/e6e972a63aff21de236e67cbe3c4c3b8fc2ca0ca/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-all.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | # 4 | # Copyright 2015 the original author or authors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # 10 | # https://www.apache.org/licenses/LICENSE-2.0 11 | # 12 | # Unless required by applicable law or agreed to in writing, software 13 | # distributed under the License is distributed on an "AS IS" BASIS, 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | # See the License for the specific language governing permissions and 16 | # limitations under the License. 17 | # 18 | 19 | ############################################################################## 20 | ## 21 | ## Gradle start up script for UN*X 22 | ## 23 | ############################################################################## 24 | 25 | # Attempt to set APP_HOME 26 | # Resolve links: $0 may be a link 27 | PRG="$0" 28 | # Need this for relative symlinks. 29 | while [ -h "$PRG" ] ; do 30 | ls=`ls -ld "$PRG"` 31 | link=`expr "$ls" : '.*-> \(.*\)$'` 32 | if expr "$link" : '/.*' > /dev/null; then 33 | PRG="$link" 34 | else 35 | PRG=`dirname "$PRG"`"/$link" 36 | fi 37 | done 38 | SAVED="`pwd`" 39 | cd "`dirname \"$PRG\"`/" >/dev/null 40 | APP_HOME="`pwd -P`" 41 | cd "$SAVED" >/dev/null 42 | 43 | APP_NAME="Gradle" 44 | APP_BASE_NAME=`basename "$0"` 45 | 46 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 47 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 48 | 49 | # Use the maximum available, or set MAX_FD != -1 to use that value. 50 | MAX_FD="maximum" 51 | 52 | warn () { 53 | echo "$*" 54 | } 55 | 56 | die () { 57 | echo 58 | echo "$*" 59 | echo 60 | exit 1 61 | } 62 | 63 | # OS specific support (must be 'true' or 'false'). 64 | cygwin=false 65 | msys=false 66 | darwin=false 67 | nonstop=false 68 | case "`uname`" in 69 | CYGWIN* ) 70 | cygwin=true 71 | ;; 72 | Darwin* ) 73 | darwin=true 74 | ;; 75 | MSYS* | MINGW* ) 76 | msys=true 77 | ;; 78 | NONSTOP* ) 79 | nonstop=true 80 | ;; 81 | esac 82 | 83 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 84 | 85 | 86 | # Determine the Java command to use to start the JVM. 87 | if [ -n "$JAVA_HOME" ] ; then 88 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 89 | # IBM's JDK on AIX uses strange locations for the executables 90 | JAVACMD="$JAVA_HOME/jre/sh/java" 91 | else 92 | JAVACMD="$JAVA_HOME/bin/java" 93 | fi 94 | if [ ! -x "$JAVACMD" ] ; then 95 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 96 | 97 | Please set the JAVA_HOME variable in your environment to match the 98 | location of your Java installation." 99 | fi 100 | else 101 | JAVACMD="java" 102 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 103 | 104 | Please set the JAVA_HOME variable in your environment to match the 105 | location of your Java installation." 106 | fi 107 | 108 | # Increase the maximum file descriptors if we can. 109 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 110 | MAX_FD_LIMIT=`ulimit -H -n` 111 | if [ $? -eq 0 ] ; then 112 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 113 | MAX_FD="$MAX_FD_LIMIT" 114 | fi 115 | ulimit -n $MAX_FD 116 | if [ $? -ne 0 ] ; then 117 | warn "Could not set maximum file descriptor limit: $MAX_FD" 118 | fi 119 | else 120 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 121 | fi 122 | fi 123 | 124 | # For Darwin, add options to specify how the application appears in the dock 125 | if $darwin; then 126 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 127 | fi 128 | 129 | # For Cygwin or MSYS, switch paths to Windows format before running java 130 | if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then 131 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 132 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 133 | 134 | JAVACMD=`cygpath --unix "$JAVACMD"` 135 | 136 | # We build the pattern for arguments to be converted via cygpath 137 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 138 | SEP="" 139 | for dir in $ROOTDIRSRAW ; do 140 | ROOTDIRS="$ROOTDIRS$SEP$dir" 141 | SEP="|" 142 | done 143 | OURCYGPATTERN="(^($ROOTDIRS))" 144 | # Add a user-defined pattern to the cygpath arguments 145 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 146 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 147 | fi 148 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 149 | i=0 150 | for arg in "$@" ; do 151 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 152 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 153 | 154 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 155 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 156 | else 157 | eval `echo args$i`="\"$arg\"" 158 | fi 159 | i=`expr $i + 1` 160 | done 161 | case $i in 162 | 0) set -- ;; 163 | 1) set -- "$args0" ;; 164 | 2) set -- "$args0" "$args1" ;; 165 | 3) set -- "$args0" "$args1" "$args2" ;; 166 | 4) set -- "$args0" "$args1" "$args2" "$args3" ;; 167 | 5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 168 | 6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 169 | 7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 170 | 8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 171 | 9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 172 | esac 173 | fi 174 | 175 | # Escape application args 176 | save () { 177 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 178 | echo " " 179 | } 180 | APP_ARGS=`save "$@"` 181 | 182 | # Collect all arguments for the java command, following the shell quoting and substitution rules 183 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 184 | 185 | exec "$JAVACMD" "$@" 186 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%" == "" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%" == "" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter. 33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi 34 | 35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 37 | 38 | @rem Find java.exe 39 | if defined JAVA_HOME goto findJavaFromJavaHome 40 | 41 | set JAVA_EXE=java.exe 42 | %JAVA_EXE% -version >NUL 2>&1 43 | if "%ERRORLEVEL%" == "0" goto execute 44 | 45 | echo. 46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 47 | echo. 48 | echo Please set the JAVA_HOME variable in your environment to match the 49 | echo location of your Java installation. 50 | 51 | goto fail 52 | 53 | :findJavaFromJavaHome 54 | set JAVA_HOME=%JAVA_HOME:"=% 55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 56 | 57 | if exist "%JAVA_EXE%" goto execute 58 | 59 | echo. 60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 61 | echo. 62 | echo Please set the JAVA_HOME variable in your environment to match the 63 | echo location of your Java installation. 64 | 65 | goto fail 66 | 67 | :execute 68 | @rem Setup the command line 69 | 70 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 71 | 72 | 73 | @rem Execute Gradle 74 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* 75 | 76 | :end 77 | @rem End local scope for the variables with windows NT shell 78 | if "%ERRORLEVEL%"=="0" goto mainEnd 79 | 80 | :fail 81 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 82 | rem the _cmd.exe /c_ return code! 83 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 84 | exit /b 1 85 | 86 | :mainEnd 87 | if "%OS%"=="Windows_NT" endlocal 88 | 89 | :omega 90 | -------------------------------------------------------------------------------- /library/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.library' 2 | 3 | android { 4 | compileSdkVersion 30 5 | 6 | 7 | defaultConfig { 8 | minSdkVersion 15 9 | targetSdkVersion 30 10 | versionCode 12 11 | versionName "1.2" 12 | 13 | testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" 14 | 15 | } 16 | 17 | buildTypes { 18 | release { 19 | minifyEnabled false 20 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' 21 | } 22 | } 23 | 24 | } 25 | 26 | dependencies { 27 | implementation fileTree(dir: 'libs', include: ['*.jar']) 28 | 29 | testImplementation 'junit:junit:4.12' 30 | } 31 | -------------------------------------------------------------------------------- /library/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # You can control the set of applied configuration files using the 3 | # proguardFiles setting in build.gradle. 4 | # 5 | # For more details, see 6 | # http://developer.android.com/guide/developing/tools/proguard.html 7 | 8 | # If your project uses WebView with JS, uncomment the following 9 | # and specify the fully qualified class name to the JavaScript interface 10 | # class: 11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 12 | # public *; 13 | #} 14 | 15 | # Uncomment this to preserve the line number information for 16 | # debugging stack traces. 17 | #-keepattributes SourceFile,LineNumberTable 18 | 19 | # If you keep the line number information, uncomment this to 20 | # hide the original source file name. 21 | #-renamesourcefileattribute SourceFile 22 | -------------------------------------------------------------------------------- /library/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 3 | -------------------------------------------------------------------------------- /library/src/main/java/com/github/infinitebanner/AbsBannerAdapter.java: -------------------------------------------------------------------------------- 1 | package com.github.infinitebanner; 2 | 3 | import android.content.Context; 4 | import android.database.DataSetObservable; 5 | import android.database.DataSetObserver; 6 | import android.view.View; 7 | 8 | /** 9 | * Created by Marksss on 2019/8/13. 10 | */ 11 | public abstract class AbsBannerAdapter { 12 | private final DataSetObservable mDataSetObservable = new DataSetObservable(); 13 | 14 | void registerDataSetObserver(DataSetObserver observer) { 15 | mDataSetObservable.registerObserver(observer); 16 | } 17 | 18 | void unregisterDataSetObserver(DataSetObserver observer) { 19 | mDataSetObservable.unregisterObserver(observer); 20 | } 21 | 22 | public void notifyDataSetChanged() { 23 | mDataSetObservable.notifyChanged(); 24 | } 25 | 26 | public void notifyDataSetInvalidated() { 27 | mDataSetObservable.notifyInvalidated(); 28 | } 29 | 30 | protected abstract int getCount(); 31 | 32 | protected abstract View makeView(InfiniteBannerView parent); 33 | 34 | protected abstract void bind(View view, int position); 35 | } 36 | -------------------------------------------------------------------------------- /library/src/main/java/com/github/infinitebanner/InfiniteBannerView.java: -------------------------------------------------------------------------------- 1 | package com.github.infinitebanner; 2 | 3 | import android.annotation.SuppressLint; 4 | import android.content.Context; 5 | import android.content.res.TypedArray; 6 | import android.database.DataSetObserver; 7 | import android.os.Handler; 8 | import android.os.Looper; 9 | import android.util.AttributeSet; 10 | import android.util.Log; 11 | import android.util.SparseArray; 12 | import android.view.MotionEvent; 13 | import android.view.VelocityTracker; 14 | import android.view.View; 15 | import android.view.ViewConfiguration; 16 | import android.view.ViewGroup; 17 | import android.widget.Scroller; 18 | 19 | import java.util.ArrayList; 20 | import java.util.List; 21 | 22 | /** 23 | * A banner view that can automatically or manually scroll in a loop 24 | * Created by Marksss on 2019/8/12. 25 | */ 26 | public class InfiniteBannerView extends ViewGroup { 27 | private static final int MAX_SCROLL_X = Integer.MAX_VALUE - (Integer.MAX_VALUE >> 3); 28 | private final Pager mPager = new Pager(); 29 | private long mLoopInterval = 3000; 30 | private AbsBannerAdapter mAdapter; 31 | private final Handler mHandler = new Handler(Looper.getMainLooper()); 32 | private int mDividerWidth = 0; 33 | private float mForegroundWidthPercent = 1f; // 0.34<=percent<=0.1 34 | private boolean mIsReverse, mIsManuallyScrollLocked, mIsAutoScroll; 35 | private boolean mIsTouching, mIsAttachToWindow; 36 | private long mLastTouchTime, mLastScrollTime; 37 | private int mLastX, mLastDownX, mLastDownY; 38 | private Scroller mScroller; 39 | private int mTouchSlop, mMaxVelocity; 40 | private OnItemClickListener mOnItemClickListener; 41 | private List mOnPageChangeListeners = new ArrayList<>(); 42 | private ScrollIntercepter mScrollIntercepter; 43 | private PageTransformer mPageTransformer; 44 | private SparseArray mViewsMap = new SparseArray<>(); 45 | 46 | public InfiniteBannerView(Context context) { 47 | super(context); 48 | init(context, null); 49 | } 50 | 51 | public InfiniteBannerView(Context context, AttributeSet attrs) { 52 | super(context, attrs); 53 | init(context, attrs); 54 | } 55 | 56 | public InfiniteBannerView(Context context, AttributeSet attrs, int defStyleAttr) { 57 | super(context, attrs, defStyleAttr); 58 | init(context, attrs); 59 | } 60 | 61 | private void init(Context context, AttributeSet attrs) { 62 | if (attrs != null) { 63 | TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.InfiniteBannerView); 64 | mDividerWidth = a.getDimensionPixelSize(R.styleable.InfiniteBannerView_bannerDividerWidth, mDividerWidth); 65 | mPager.initPosition(a.getInt(R.styleable.InfiniteBannerView_bannerInitialPage, 0)); 66 | mIsManuallyScrollLocked = a.getBoolean(R.styleable.InfiniteBannerView_bannerManuallyScrollLock, false); 67 | mIsAutoScroll = a.getBoolean(R.styleable.InfiniteBannerView_bannerAutoScroll, false); 68 | mIsReverse = a.getBoolean(R.styleable.InfiniteBannerView_bannerScrollReverse, false); 69 | float foregroundWidthPercent = a.getFloat(R.styleable.InfiniteBannerView_bannerForegroundWidthPercent, mForegroundWidthPercent); 70 | if (foregroundWidthPercent < 1f){ 71 | setForegroundWidthPercent(foregroundWidthPercent); 72 | } 73 | String s = a.getString(R.styleable.InfiniteBannerView_bannerLoopInterval); 74 | if (s != null) { 75 | try { 76 | mLoopInterval = Long.parseLong(s); 77 | } catch (NumberFormatException e) { 78 | Log.e("InfiniteBannerView", e.getMessage()); 79 | } 80 | } 81 | a.recycle(); 82 | } 83 | mScroller = new Scroller(context); 84 | ViewConfiguration config = ViewConfiguration.get(context); 85 | mTouchSlop = config.getScaledPagingTouchSlop(); 86 | mMaxVelocity = config.getScaledMinimumFlingVelocity(); 87 | } 88 | 89 | @Override 90 | protected void onAttachedToWindow() { 91 | super.onAttachedToWindow(); 92 | if (mAdapter != null) { 93 | mAdapter.registerDataSetObserver(mDataObserver); 94 | } 95 | startLoopIfNeeded(); 96 | mIsAttachToWindow = true; 97 | } 98 | 99 | @Override 100 | protected void onDetachedFromWindow() { 101 | super.onDetachedFromWindow(); 102 | if (mAdapter != null) { 103 | mAdapter.unregisterDataSetObserver(mDataObserver); 104 | } 105 | dispose(); 106 | mIsAttachToWindow = false; 107 | } 108 | 109 | @Override 110 | protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 111 | int sizeHeight = MeasureSpec.getSize(heightMeasureSpec); 112 | int modeHeight = MeasureSpec.getMode(heightMeasureSpec); 113 | int maxHeight = sizeHeight - getPaddingTop() - getPaddingBottom(); 114 | int childMaxWidth = (int) ((MeasureSpec.getSize(widthMeasureSpec) - getPaddingLeft() - getPaddingRight()) * mForegroundWidthPercent) - mDividerWidth; 115 | int height = 0; 116 | for (int i = 0; i < getChildCount(); i++) { 117 | View child = getChildAt(i); 118 | measureChild(child, MeasureSpec.makeMeasureSpec(childMaxWidth, MeasureSpec.EXACTLY), heightMeasureSpec); 119 | height = Math.min(Math.max(height, child.getMeasuredHeight()), maxHeight); 120 | } 121 | setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), 122 | modeHeight == MeasureSpec.EXACTLY ? sizeHeight : height + getPaddingTop() + getPaddingBottom()); 123 | } 124 | 125 | @Override 126 | protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 127 | if (getChildCount() == 0 || mAdapter == null) { 128 | return; 129 | } 130 | int outsideLength = (int) (getMeasuredWidth() * (1f - mForegroundWidthPercent) / 2); 131 | int periodLength = getPeriodLength(getMeasuredWidth()); 132 | if (mPager.isSkippingPosition()) { 133 | // refresh the layout after reset 134 | int head = mPager.mCurrentPosition - getDepthWithCache(); 135 | int tail = mPager.mCurrentPosition + getDepthWithCache(); 136 | while (head <= tail) { 137 | if (head == tail) { 138 | childLayout(getViewOnPosition(head), periodLength, outsideLength, head); 139 | } else { 140 | childLayout(getViewOnPosition(head), periodLength, outsideLength, head); 141 | childLayout(getViewOnPosition(tail), periodLength, outsideLength, tail); 142 | } 143 | head++; 144 | tail--; 145 | } 146 | } else if (mPager.isPreviousPosition()) { 147 | // scroll to the previous position 148 | childLayout(getViewOnPosition(mPager.mPositionLastRelayout + getDepthWithCache()), 149 | periodLength, outsideLength, mPager.mPositionLastRelayout - getDepthWithCache() - 1); 150 | } else if (mPager.isNextPosition()) { 151 | // scroll to the next position 152 | childLayout(getViewOnPosition(mPager.mPositionLastRelayout - getDepthWithCache()), 153 | periodLength, outsideLength, mPager.mPositionLastRelayout + getDepthWithCache() + 1); 154 | } 155 | mPager.recordWhenRelayout(); 156 | } 157 | 158 | private void childLayout(final View child, int periodLength, int outsideLength, int page) { 159 | if (child == null) { 160 | return; 161 | } 162 | final int index = getLoopIndex(page); 163 | if (index >= 0) { 164 | int childX = outsideLength + page * periodLength; 165 | child.layout( 166 | childX, 167 | 0, 168 | childX + periodLength - mDividerWidth, 169 | getMeasuredHeight()); 170 | mAdapter.bind(child, index); 171 | } else { 172 | child.layout(0, 0, 0, 0); 173 | } 174 | } 175 | 176 | @Override 177 | public void computeScroll() { 178 | if (mScroller.computeScrollOffset()) { 179 | int scrollX = mScroller.getCurrX(); 180 | scrollTo(scrollX, mScroller.getCurrY()); 181 | invalidate(); 182 | } 183 | } 184 | 185 | @Override 186 | protected void onScrollChanged(int l, int t, int oldl, int oldt) { 187 | super.onScrollChanged(l, t, oldl, oldt); 188 | 189 | if (getItemCount() > 0) { 190 | int periodLength = getPeriodLength(getWidth()); 191 | int page = l / periodLength; 192 | int positionOffsetPixels = l % periodLength; 193 | if (l < 0){ 194 | page -= 1; 195 | positionOffsetPixels += periodLength; 196 | } 197 | float positionOffset = (float) positionOffsetPixels / (float) periodLength; 198 | onPageScrolledInternal(page, positionOffset, positionOffsetPixels); 199 | } 200 | } 201 | 202 | @SuppressLint("ClickableViewAccessibility") 203 | @Override 204 | public boolean onTouchEvent(MotionEvent ev) { 205 | int x = (int) ev.getX(); 206 | int y = (int) ev.getY(); 207 | switch (ev.getAction()) { 208 | case MotionEvent.ACTION_DOWN: 209 | if (!mScroller.isFinished() && !isManuallyScrollLocked()) { 210 | mScroller.abortAnimation(); 211 | } 212 | mLastX = mLastDownX = x; 213 | mLastDownY = y; 214 | mIsTouching = true; 215 | break; 216 | case MotionEvent.ACTION_MOVE: 217 | if (!isManuallyScrollLocked()) { 218 | int dx = mLastX - x; 219 | if (isCurrentScrollAllowed(mPager.mCurrentPosition, dx > 0)) { 220 | scrollBy(dx, 0); 221 | } 222 | if (Math.abs(mLastDownX - x) > 20) { 223 | requestDisallowInterceptTouchEvent(true); 224 | } 225 | } 226 | mLastX = x; 227 | break; 228 | case MotionEvent.ACTION_OUTSIDE: 229 | case MotionEvent.ACTION_CANCEL: 230 | if (x != mLastDownX) { 231 | slowScrollToPage(); 232 | } 233 | touchFinished(); 234 | break; 235 | case MotionEvent.ACTION_UP: 236 | float outsideEachPercent = (1f - mForegroundWidthPercent) / 2; 237 | if (Math.abs(mLastDownX - x) < 20 238 | && Math.abs(mLastDownY - y) < 20 239 | && !performClick()) { 240 | if (x > getWidth() * outsideEachPercent && x < getWidth() * (1 - outsideEachPercent)) { 241 | handleClick(); 242 | } else if (!isManuallyScrollLocked()) { 243 | slowScrollToPage(); 244 | } 245 | } else if (!isManuallyScrollLocked()) { 246 | handleScroll(x); 247 | } 248 | touchFinished(); 249 | break; 250 | default: 251 | mIsTouching = false; 252 | break; 253 | } 254 | return true; 255 | } 256 | 257 | private void handleScroll(int x) { 258 | if (x - mLastDownX > 50) { 259 | goPreviousPage(); 260 | } else if (mLastDownX - x > 50) { 261 | goNextPage(); 262 | } else { 263 | slowScrollToPage(); 264 | } 265 | } 266 | 267 | private void touchFinished() { 268 | mIsTouching = false; 269 | mLastTouchTime = System.currentTimeMillis(); 270 | } 271 | 272 | private void handleClick() { 273 | if (mOnItemClickListener != null && getItemCount() > 0) { 274 | int periodLength = getPeriodLength(getWidth()); 275 | int page = getScrollX() / periodLength; 276 | if (getScrollX() % periodLength > periodLength / 2) { 277 | page++; 278 | } else if (getScrollX() % periodLength < -periodLength / 2){ 279 | page--; 280 | } 281 | mOnItemClickListener.click(this, getLoopIndex(page)); 282 | } 283 | } 284 | 285 | private void slowScrollToPage() { 286 | int periodLength = getPeriodLength(getWidth()); 287 | int whichPage = (getScrollX() + periodLength / 2) / periodLength; 288 | scrollToPage(whichPage); 289 | } 290 | 291 | private int getPeriodLength(int width) { 292 | return (int) (width * mForegroundWidthPercent) + mDividerWidth; 293 | } 294 | 295 | private void scrollToPage(int indexPage) { 296 | int loopIndex = getLoopIndex(indexPage); 297 | if (loopIndex == mPager.mInitialPosition && Math.abs(getScrollX()) > MAX_SCROLL_X) { 298 | reset(); 299 | return; 300 | } 301 | int periodLength = getPeriodLength(getWidth()); 302 | if (mPager.mCurrentPosition != indexPage) { 303 | long currentTime = System.currentTimeMillis(); 304 | // If it scroll too fast, just go back to the current position or it looks weird. 305 | boolean changeable = Math.abs(getScrollX() - mPager.mCurrentPosition * periodLength) <= 2 * periodLength 306 | && currentTime - mLastScrollTime > 300; 307 | if (changeable) { 308 | mPager.updateCurrentPosition(indexPage); 309 | mLastScrollTime = currentTime; 310 | if (!mOnPageChangeListeners.isEmpty()) { 311 | for (OnPageChangeListener onPageChangeListener : mOnPageChangeListeners) { 312 | onPageChangeListener.onPageSelected(loopIndex); 313 | } 314 | } 315 | } 316 | } 317 | int dx = mPager.mCurrentPosition * periodLength - getScrollX(); 318 | mScroller.startScroll(getScrollX(), 0, dx, 0, Math.abs(dx)); 319 | requestLayout(); 320 | } 321 | 322 | public void onPageScrolledInternal(int position, float positionOffset, int positionOffsetPixels) { 323 | if (!mOnPageChangeListeners.isEmpty()) { 324 | for (OnPageChangeListener onPageChangeListener : mOnPageChangeListeners) { 325 | onPageChangeListener.onPageScrolled(getLoopIndex(position), positionOffset, positionOffsetPixels); 326 | } 327 | } 328 | if (mPageTransformer != null) { 329 | transform(position, 1f - positionOffset); 330 | transform(position + 1, positionOffset); 331 | transform(position - 1, 0); 332 | transform(position + 2, 0); 333 | } 334 | } 335 | 336 | private void transform(int position, float transformPos) { 337 | View child = getViewOnPosition(position); 338 | if (child != null && getWidth() > 0) { 339 | mPageTransformer.transformPage(child, transformPos); 340 | } 341 | } 342 | 343 | public void setInitPosition(int position) { 344 | mPager.initPosition(position); 345 | reset(); 346 | } 347 | 348 | public int getInitPostion() { 349 | return mPager.mInitialPosition; 350 | } 351 | 352 | public int getCurrentPosition() { 353 | return mPager.mCurrentPosition; 354 | } 355 | 356 | public boolean isReverse() { 357 | return mIsReverse; 358 | } 359 | 360 | /** 361 | * @param reverse 362 | * false:from right to left 363 | * true:from left to right 364 | */ 365 | public void setReverse(boolean reverse) { 366 | mIsReverse = reverse; 367 | } 368 | 369 | private boolean isManuallyScrollLocked() { 370 | return mIsManuallyScrollLocked || getItemCount() <= 1; 371 | } 372 | 373 | /** 374 | * The manually scrolling will be locked or not 375 | * @param locked 376 | */ 377 | public void setManuallyScrollLocked(boolean locked) { 378 | mIsManuallyScrollLocked = locked; 379 | } 380 | 381 | public boolean isAutoScroll() { 382 | return mIsAutoScroll; 383 | } 384 | 385 | /** 386 | * It will automatically scroll or not after the data is loaded 387 | * @param autoScroll 388 | */ 389 | public void setAutoScroll(boolean autoScroll) { 390 | mIsAutoScroll = autoScroll; 391 | } 392 | 393 | /** 394 | * Scroll to the next position 395 | */ 396 | public void goNextPage() { 397 | if (isCurrentScrollAllowed(mPager.mCurrentPosition, true)) { 398 | scrollToPage(mPager.mCurrentPosition + 1); 399 | } 400 | } 401 | 402 | /** 403 | * Scroll to the previous position 404 | */ 405 | public void goPreviousPage() { 406 | if (isCurrentScrollAllowed(mPager.mCurrentPosition, false)) { 407 | scrollToPage(mPager.mCurrentPosition - 1); 408 | } 409 | } 410 | 411 | /** 412 | * Resume the scrolling animation 413 | */ 414 | public void resumeLoop() { 415 | dispose(); 416 | if (getItemCount() > 1) { 417 | loop(); 418 | } 419 | } 420 | 421 | /** 422 | * Pause the scrolling animation 423 | */ 424 | public void pauseLoop() { 425 | dispose(); 426 | } 427 | 428 | private boolean isCurrentScrollAllowed(int position, boolean forward) { 429 | return mScrollIntercepter == null || !mScrollIntercepter.onScrollIntercept(position, forward); 430 | } 431 | 432 | private View getViewOnPosition(int position) { 433 | int index = getLoopIndex(getChildCount(), position); 434 | return mViewsMap.get(index); 435 | } 436 | 437 | private void loop(){ 438 | mHandler.postDelayed(new Runnable() { 439 | @Override 440 | public void run() { 441 | if (!mIsTouching && System.currentTimeMillis() - mLastTouchTime > mLoopInterval / 2) { 442 | if (mIsReverse) { 443 | goPreviousPage(); 444 | } else { 445 | goNextPage(); 446 | } 447 | } 448 | loop(); 449 | } 450 | }, mLoopInterval); 451 | } 452 | 453 | private void dispose() { 454 | mHandler.removeCallbacksAndMessages(null); 455 | } 456 | 457 | private void reset() { 458 | relayoutAllViews(); 459 | mPager.reset(); 460 | post(new Runnable() { 461 | @Override 462 | public void run() { 463 | int periodLength = getPeriodLength(getWidth()); 464 | scrollTo(mPager.mInitialPosition * periodLength, 0); 465 | requestLayout(); 466 | if (!mOnPageChangeListeners.isEmpty()) { 467 | for (OnPageChangeListener onPageChangeListener : mOnPageChangeListeners) { 468 | onPageChangeListener.onPageSelected(mPager.mInitialPosition); 469 | } 470 | } 471 | onPageScrolledInternal(mPager.mInitialPosition, 0, 0); 472 | startLoopIfNeeded(); 473 | } 474 | }); 475 | } 476 | 477 | private void startLoopIfNeeded() { 478 | if (getItemCount() > 1 && mIsAutoScroll) { 479 | resumeLoop(); 480 | } 481 | } 482 | 483 | private void relayoutAllViews() { 484 | removeAllViewsInLayout(); 485 | int count = getItemCount(); 486 | for (int i = 0; i <= getDepthWithCache() * 2; i++) { 487 | View view = mViewsMap.get(i); 488 | if (view == null) { 489 | view = mAdapter.makeView(this); 490 | mViewsMap.put(i, view); 491 | } 492 | super.addView(view); 493 | } 494 | } 495 | 496 | /** 497 | * @return The layers that will be re-loaded 498 | */ 499 | private int getDepthWithCache() { 500 | return mForegroundWidthPercent < 1f ? 3 : 2; 501 | } 502 | 503 | private int getLoopIndex(int index) { 504 | return getLoopIndex(getItemCount(), index); 505 | } 506 | 507 | private int getLoopIndex(int totalCount, int index) { 508 | if (totalCount == 0){ 509 | return -1; 510 | } 511 | return index >= 0 ? index % totalCount : totalCount + (index + 1) % totalCount - 1; 512 | } 513 | 514 | public AbsBannerAdapter getAdapter() { 515 | return mAdapter; 516 | } 517 | 518 | public void setAdapter(AbsBannerAdapter adapter) { 519 | if (mAdapter != null) { 520 | mAdapter.unregisterDataSetObserver(mDataObserver); 521 | } 522 | mAdapter = adapter; 523 | if (mIsAttachToWindow) { 524 | mAdapter.registerDataSetObserver(mDataObserver); 525 | } 526 | reset(); 527 | } 528 | 529 | public ScrollIntercepter getScrollIntercepter() { 530 | return mScrollIntercepter; 531 | } 532 | 533 | public void setScrollIntercepter(ScrollIntercepter scrollIntercepter) { 534 | mScrollIntercepter = scrollIntercepter; 535 | } 536 | 537 | public void setPageTransformer(PageTransformer pageTransformer) { 538 | mPageTransformer = pageTransformer; 539 | } 540 | 541 | public OnItemClickListener getOnItemClickListener() { 542 | return mOnItemClickListener; 543 | } 544 | 545 | public void setOnItemClickListener(OnItemClickListener onItemClickListener) { 546 | mOnItemClickListener = onItemClickListener; 547 | } 548 | 549 | public void addOnPageChangeListener(OnPageChangeListener onPageChangeListener) { 550 | mOnPageChangeListeners.add(onPageChangeListener); 551 | } 552 | 553 | public void removeOnPageChangeListener(OnPageChangeListener onPageChangeListener) { 554 | mOnPageChangeListeners.remove(onPageChangeListener); 555 | } 556 | 557 | public int getDividerWidth() { 558 | return mDividerWidth; 559 | } 560 | 561 | /** 562 | * Space between two items 563 | * @param dividerWidth 564 | */ 565 | public void setDividerWidth(int dividerWidth) { 566 | mDividerWidth = dividerWidth; 567 | } 568 | 569 | public float getForegroundWidthPercent() { 570 | return mForegroundWidthPercent; 571 | } 572 | 573 | /** 574 | * The width 575 | * @param foregroundWidthPercent 576 | */ 577 | public void setForegroundWidthPercent(float foregroundWidthPercent) { 578 | mForegroundWidthPercent = Math.max(Math.min(foregroundWidthPercent, 1f), 0.34f); 579 | } 580 | 581 | public long getLoopInterval() { 582 | return mLoopInterval; 583 | } 584 | 585 | /** 586 | * Time interval between automatically scrolling animations 587 | * @param loopInterval (millisecond) 588 | */ 589 | public void setLoopInterval(long loopInterval) { 590 | mLoopInterval = loopInterval; 591 | } 592 | 593 | private int getItemCount() { 594 | return mAdapter == null ? 0 : mAdapter.getCount(); 595 | } 596 | 597 | private DataSetObserver mDataObserver = new DataSetObserver() { 598 | @Override 599 | public void onChanged() { 600 | reset(); 601 | } 602 | 603 | @Override 604 | public void onInvalidated() { 605 | requestLayout(); 606 | } 607 | }; 608 | 609 | public static interface OnItemClickListener { 610 | void click(InfiniteBannerView view, int position); 611 | } 612 | 613 | public static interface OnPageChangeListener { 614 | // See OnPageChangeListener in ViewPager 615 | void onPageScrolled(int position, float positionOffset, int positionOffsetPixels); 616 | void onPageSelected(int position); 617 | } 618 | 619 | public static interface ScrollIntercepter { 620 | /** 621 | * @param position current 622 | * @param forward true：from right to left；false：from left to right 623 | * @return intercept or not 624 | */ 625 | boolean onScrollIntercept(int position, boolean forward); 626 | } 627 | 628 | public interface PageTransformer { 629 | // See PageTransformer in ViewPager 630 | void transformPage(View view, float arg); 631 | } 632 | 633 | private static class Pager { 634 | private int mInitialPosition = 0, mCurrentPosition; 635 | private int mPositionLastRelayout = Integer.MAX_VALUE; 636 | 637 | private void initPosition(int position) { 638 | mInitialPosition = position; 639 | mCurrentPosition = mInitialPosition; 640 | } 641 | 642 | private void reset() { 643 | mPositionLastRelayout = Integer.MAX_VALUE; 644 | mCurrentPosition = mInitialPosition; 645 | } 646 | 647 | private void updateCurrentPosition(int currentPosition) { 648 | mCurrentPosition = currentPosition; 649 | } 650 | 651 | private void recordWhenRelayout() { 652 | mPositionLastRelayout = mCurrentPosition; 653 | } 654 | 655 | private boolean isSkippingPosition() { 656 | return Math.abs(mPositionLastRelayout - mCurrentPosition) > 1; 657 | } 658 | 659 | private boolean isNextPosition() { 660 | return mCurrentPosition - mPositionLastRelayout == 1; 661 | } 662 | 663 | private boolean isPreviousPosition() { 664 | return mCurrentPosition - mPositionLastRelayout == -1; 665 | } 666 | } 667 | } -------------------------------------------------------------------------------- /library/src/main/res/values/attrs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | -------------------------------------------------------------------------------- /library/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | InfiniteBanner 3 | 4 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | include ':app', ':library' 2 | --------------------------------------------------------------------------------