2.3.0发布，更新内容看release

README.md

@@ -17,6 +17,7 @@
  * page和linear两种滑动方式
  * 百分比适配，但只会根据宽高其中一个维度适配
  * 非无循环模式边界支持回弹，可动态设置是否开启
+ * 支持预加载
 
 想实现轮播效果的同学，1.x版本可以参考[CrazyDaily](https://github.com/crazysunj/CrazyDaily "https://github.com/crazysunj/CrazyDaily")开源项目首页实现，2.x版本可以参考本项目实例，还有炫酷的指示器、3D旋转和倒影效果哦
 

README_2.0.md

@@ -135,6 +135,8 @@ public static Bitmap convertReflection(@NonNull Bitmap originalImage, int viewWi
 <attr name="card_side_offset_percent" format="float" />
 // item的宽高比
 <attr name="card_item_rate" format="float" />
+// 预加载数量，默认0
+<attr name="card_page_limit" format="integer" />
 // 滑动模式，page-类似ViewPager，linear-类似平时RecyclerView(有作滑动优化)
 <attr name="card_page_mode" format="enum">
     <enum name="linear" value="0" />
@@ -145,7 +147,7 @@ public static Bitmap convertReflection(@NonNull Bitmap originalImage, int viewWi
 ## gradle依赖
 
 ```
-implementation 'com.crazysunj:cardslideview:2.2.1'
+implementation 'com.crazysunj:cardslideview:2.3.0'
 同时还需要依赖自己的v4包和recyclerview包，androidx哦
 ```
 

app/build.gradle

@@ -25,7 +25,7 @@ android {
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
 //    implementation project(':cardslideview')
-    implementation 'com.crazysunj:cardslideview:2.2.1'
+    implementation 'com.crazysunj:cardslideview:2.3.0'
 //    implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
     implementation 'com.github.bumptech.glide:glide:4.11.0'

app/src/main/java/com/crazysunj/cardslide/BannerView.java

@@ -21,9 +21,6 @@
 
 
 /**
- * banner控件，基于RecyclerView，由于还未使用androidX，没用上ViewPager2，完全靠摸索调试自测
- * 发现任何展示错误，请联系我，描述场景以及错误异常
- *
  * @author sunjian
  * @date 2019-12-30 10:09
  */

app/src/main/res/layout/view_banner.xml

@@ -13,6 +13,7 @@
         app:card_item_margin_percent="-0.84"
         app:card_item_rate="0.7"
         app:card_loop="true"
+        app:card_page_limit="1"
         app:card_page_mode="page"
         app:card_side_offset_percent="0.24" />
 

build.gradle

@@ -31,7 +31,7 @@ ext {
     userOrg = 'twsunj'
     groupId = 'com.crazysunj'
     uploadName = 'CardSlideView'
-    publishVersion = '2.2.1'
+    publishVersion = '2.3.0'
     desc = 'CardSlideView For Android'
     website = 'https://github.com/crazysunj/CardSlideView'
     licences = ['Apache-2.0']

cardslideview/src/main/java/com/crazysunj/cardslideview/CardSlideView.java

@@ -141,6 +141,8 @@ private void initView(Context context, @Nullable AttributeSet attrs) {
         // item之间间距，可设负值（叠加），百分比是相对自身宽度或高度
         final float itemMarginPercent;
         final boolean isRebound;
+        // 预加载数量，默认0
+        final int pageLimit;
         if (attrs != null) {
             TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.CardSlideView);
             mSideOffsetPercent = ta.getFloat(R.styleable.CardSlideView_card_side_offset_percent, 0.25f);
@@ -150,6 +152,7 @@ private void initView(Context context, @Nullable AttributeSet attrs) {
             itemMarginPercent = Math.min(1, Math.max(-1, ta.getFloat(R.styleable.CardSlideView_card_item_margin_percent, 0f)));
             orientation = ta.getInt(R.styleable.CardSlideView_android_orientation, LinearLayout.HORIZONTAL);
             cardMode = ta.getInt(R.styleable.CardSlideView_card_page_mode, MODE_PAGE);
+            pageLimit = ta.getInteger(R.styleable.CardSlideView_card_page_limit, 0);
             ta.recycle();
         } else {
             mSideOffsetPercent = 0.25f;
@@ -159,6 +162,7 @@ private void initView(Context context, @Nullable AttributeSet attrs) {
             itemMarginPercent = 0;
             orientation = LinearLayout.HORIZONTAL;
             cardMode = MODE_PAGE;
+            pageLimit = 0;
         }
         mSideOffsetPercent = Math.min(1, Math.max(0, mSideOffsetPercent));
         mCardListView = new InnerRecyclerView(context);
@@ -169,6 +173,7 @@ private void initView(Context context, @Nullable AttributeSet attrs) {
         mCardListView.setItemMarginPercent(itemMarginPercent);
         addView(mCardListView);
         mLayoutManager = new GalleryLayoutManager(orientation, mIsLoop, isRebound, itemMarginPercent);
+        mLayoutManager.setOffscreenPageLimit(pageLimit);
         mLayoutManager.setItemTransformer(new DefaultTransformer());
         mLayoutManager.attachToRecyclerView(mCardListView);
     }
@@ -316,8 +321,12 @@ public void setItemTransformer(PageTransformer pageTransformer) {
         mLayoutManager.setItemTransformer(pageTransformer);
     }
 
-    public void setOnPageChangeListener(OnPageChangeListener onPageChangeListener) {
-        mLayoutManager.setOnPageChangeListener(onPageChangeListener);
+    public void setOnPageScrollStateChangeListener(OnPageScrollStateChangeListener listener) {
+        mLayoutManager.setOnPageScrollStateChangeListener(listener);
+    }
+
+    public void setOnPageChangeListener(OnPageChangeListener listener) {
+        mLayoutManager.setOnPageChangeListener(listener);
     }
 
     public void setOnPageItemClickListener(OnPageItemClickListener<T> listener) {
@@ -456,7 +465,7 @@ public boolean onFling(int velocityX, int velocityY) {
                         if (centerView != null) {
                             final OrientationHelper helper = galleryLayoutManager.getOrientationHelper();
                             final int childSize = helper.getDecoratedMeasurement(centerView);
-                            final int itemDist = (int) (childSize * (1.f + itemMarginPercent) + 0.5f);
+                            final int itemDist = childSize + (int) (childSize * itemMarginPercent);
                             final int orientation = galleryLayoutManager.getOrientation();
                             final int velocity = orientation == LinearLayout.HORIZONTAL ? velocityX : velocityY;
                             final int count = mode == MODE_PAGE ? 1 : (int) (getDist(velocityX, velocityY, orientation) / itemDist * countRate);
@@ -470,9 +479,7 @@ public boolean onFling(int velocityX, int velocityY) {
                                 direction = GalleryLayoutManager.LAYOUT_START;
                                 edge = helper.getDecoratedStart(centerView);
                             }
-                            float offset = (helper.getTotalSpace() + childSize * direction) / 2.f;
-                            final int diff = (int) (offset - edge);
-                            dist -= diff * direction;
+                            dist -= ((int) ((helper.getTotalSpace() + childSize * direction) / 2.f) - edge) * direction;
                             if (orientation == LinearLayout.HORIZONTAL) {
                                 smoothScrollBy(dist * direction, 0);
                                 return true;