解决RecycleAdapter添加footer数据下标越界的崩溃问题

Author: catch-pig

CHANGE_lOG.md

@@ -1,7 +1,11 @@
 # CHANGE LOG
+### v0.3.4(2021.12.5)
+
++ 解决RecycleAdapter添加footer数据下标越界的崩溃问题
+
 ### v0.3.3(2021.12.4)
 
-注解ServiceApi增减debugInterceptors参数,只有NetManager.setDebug(true)的情况下,拦截器才会添加到OkHttp里面
++ 注解ServiceApi增减debugInterceptors参数,只有NetManager.setDebug(true)的情况下,拦截器才会添加到OkHttp里面
 
 ### v0.3.2(2021.11.24)
 

app/src/main/java/com/catchpig/kmvvm/config/MvvmGlobalConfig.kt

@@ -47,7 +47,7 @@ class MvvmGlobalConfig : IGlobalConfig {
     }
 
     override fun getPageSize(): Int {
-        return 18
+        return 16
     }
 
     override fun getStartPageIndex(): Int {

app/src/main/java/com/catchpig/kmvvm/recycle/RecycleActivity.kt

@@ -5,9 +5,12 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import com.bumptech.glide.Glide
 import com.catchpig.annotation.StatusBar
 import com.catchpig.kmvvm.R
+import com.catchpig.kmvvm.config.MvvmGlobalConfig
 import com.catchpig.kmvvm.databinding.ActivityRecycleBinding
+import com.catchpig.kmvvm.databinding.LayoutFooterBinding
 import com.catchpig.kmvvm.databinding.LayoutHeaderBinding
 import com.catchpig.kmvvm.entity.User
+import com.catchpig.mvvm.apt.KotlinMvvmCompiler
 import com.catchpig.mvvm.base.activity.BaseActivity
 import com.gyf.immersionbar.ktx.immersionBar
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
@@ -43,20 +46,25 @@ class RecycleActivity : BaseActivity<ActivityRecycleBinding>() {
         userAdapter.headerView<LayoutHeaderBinding> {
             headerName.text = "我是头部"
         }
+        userAdapter.footerView<LayoutFooterBinding> {
+            footerName.text = "我是底部"
+        }
 
         bodyBinding.refresh.setOnRefreshLoadMoreListener { nextPageIndex ->
-            Flowable.timer(3, TimeUnit.SECONDS).observeOn(AndroidSchedulers.mainThread()).subscribe {
-                var data: MutableList<User> = ArrayList()
-                var count = if (nextPageIndex == 3) {
-                    15
-                } else {
-                    16
-                }
-                for (i in 1..count) {
-                    data.add(User("姓名$i"))
+            Flowable.timer(3, TimeUnit.SECONDS).observeOn(AndroidSchedulers.mainThread())
+                .subscribe {
+                    var data: MutableList<User> = ArrayList()
+                    val pageSize = KotlinMvvmCompiler.globalConfig().getPageSize()
+                    var count = if (nextPageIndex == 3) {
+                        pageSize - 1
+                    } else {
+                        pageSize
+                    }
+                    for (i in 1..count) {
+                        data.add(User("姓名$i"))
+                    }
+                    userAdapter.autoUpdateList(data)
                 }
-                userAdapter.autoUpdateList(data)
-            }
         }
         bodyBinding.refresh.autoRefresh()
     }

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

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/header"
+    android:layout_width="match_parent"
+    android:layout_height="200dp"
+    android:gravity="center"
+    android:orientation="vertical">
+
+    <TextView
+        android:id="@+id/footer_name"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="底部" />
+</LinearLayout>

mvvm/src/main/java/com/catchpig/mvvm/base/adapter/RecyclerAdapter.kt

@@ -299,13 +299,19 @@ abstract class RecyclerAdapter<M, VB : ViewBinding>(private val iPageControl: IP
      * @return Int
      */
     override fun getItemViewType(position: Int): Int {
-        return if (position == 0 && showEmpty) {
+        return if (position == 0 && headerView == null && showEmpty) {
+            //当前数据空位,展示空页面
+            TYPE_EMPTY.value
+        } else if (position == 1 && headerView != null && showEmpty) {
             //当前数据空位,展示空页面
             TYPE_EMPTY.value
         } else if (position == 0 && headerView != null) {
             //当前view是头部信息
             TYPE_HEADER.value
-        } else if (position == itemCount && footerView != null) {
+        } else if (position == (itemCount - 1) && headerView != null && footerView != null) {
+            //当前view是底部信息
+            TYPE_FOOTER.value
+        } else if (position == itemCount && headerView == null && footerView != null) {
             //当前view是底部信息
             TYPE_FOOTER.value
         } else getCenterViewType(position)