refactor(*): 优化EditableImageAdapter

Author: AndroidCoderPeng

app/src/main/java/com/pengxh/kt/lib/fragments/adapter/EditableImageAdapterFragment.kt

@@ -48,7 +48,7 @@ class EditableImageAdapterFragment : KotlinBaseFragment<FragmentAdapterEditableI
 
     override fun initOnCreate(savedInstanceState: Bundle?) {
         val viewWidth = requireContext().getScreenWidth() - 100.dp2px(requireContext())
-        imageAdapter = EditableImageAdapter(requireContext(), viewWidth, 9, 3)
+        imageAdapter = EditableImageAdapter(requireContext(), recyclerViewImages, viewWidth, 9, 3)
         binding.recyclerView.addItemDecoration(
             RecyclerViewItemOffsets(marginOffset, marginOffset, marginOffset, marginOffset)
         )
@@ -72,7 +72,7 @@ class EditableImageAdapterFragment : KotlinBaseFragment<FragmentAdapterEditableI
             override fun onItemLongClick(view: View?, position: Int) {
                 selectedImages.removeAt(position)
                 recyclerViewImages.removeAt(position)
-                imageAdapter.notifyImageItemRemoved(recyclerViewImages)
+                imageAdapter.notifyDataSetChanged()
             }
         })
     }
@@ -84,10 +84,10 @@ class EditableImageAdapterFragment : KotlinBaseFragment<FragmentAdapterEditableI
             .setSelectedData(selectedImages)
             .forResult(object : OnResultCallbackListener<LocalMedia> {
                 override fun onResult(result: ArrayList<LocalMedia>) {
-                    //重置已选的图片
+                    //因为设置了selectedImages，每次选择数据都会发生变化，所以需要清空之前的缓存
                     selectedImages.clear()
-                    //因为result会带着之前的数据，所以需要清空之前已经add的数据
                     recyclerViewImages.clear()
+
                     //数据链处理已选的图片
                     lifecycleScope.launch {
                         flow {
@@ -132,7 +132,7 @@ class EditableImageAdapterFragment : KotlinBaseFragment<FragmentAdapterEditableI
             val file = msg.obj as File
 
             recyclerViewImages.add(file.absolutePath)
-            imageAdapter.notifyImageItemRangeInserted(recyclerViewImages)
+            imageAdapter.notifyDataSetChanged()
         }
         return true
     }

lite/src/main/java/com/pengxh/kt/lite/adapter/EditableImageAdapter.kt

@@ -15,33 +15,19 @@ import com.pengxh.kt.lite.R
  * 数量可编辑图片适配器
  *
  * @param context 使用适配的上下文
+ * @param images RecyclerView内数据
  * @param viewWidth RecyclerView实际宽度，一般情况下就是屏幕宽度，但是如果有其他控件和它在同一行，需要计算实际宽度，不然无法正确显示RecyclerView item的布局
  * @param imageCountLimit 最多显示的图片数目
  * @param spanCount 每行显示的图片数目
  * */
 class EditableImageAdapter(
     private val context: Context,
+    private val images: ArrayList<String>,
     private val viewWidth: Int,
     private val imageCountLimit: Int,
     private val spanCount: Int
 ) : RecyclerView.Adapter<ViewHolder>() {
 
-    private var adapterItems = ArrayList<String>()
-
-    fun notifyImageItemRangeInserted(images: ArrayList<String>) {
-        val previousSize = adapterItems.size
-        adapterItems.clear()
-        notifyItemRangeRemoved(0, previousSize)
-        adapterItems.addAll(images)
-        notifyItemRangeInserted(0, adapterItems.size)
-    }
-
-    fun notifyImageItemRemoved(images: ArrayList<String>) {
-        if (adapterItems.isNotEmpty()) {
-            notifyImageItemRangeInserted(images)
-        }
-    }
-
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
         return ViewHolder(
             LayoutInflater.from(context).inflate(R.layout.item_editable_rv_g, parent, false)
@@ -54,13 +40,13 @@ class EditableImageAdapter(
         val params = LinearLayout.LayoutParams(imageSize, imageSize)
         imageView.layoutParams = params
 
-        if (position == itemCount - 1 && adapterItems.size < imageCountLimit) {
+        if (position == itemCount - 1 && images.size < imageCountLimit) {
             imageView.setImageResource(R.drawable.ic_add_pic)
             imageView.setOnClickListener { //添加图片
                 itemClickListener?.onAddImageClick()
             }
         } else {
-            Glide.with(context).load(adapterItems[position]).into(imageView)
+            Glide.with(context).load(images[position]).into(imageView)
             imageView.setOnClickListener { // 点击操作，查看大图
                 itemClickListener?.onItemClick(holder.bindingAdapterPosition)
             }
@@ -72,10 +58,10 @@ class EditableImageAdapter(
         }
     }
 
-    override fun getItemCount(): Int = if (adapterItems.size >= imageCountLimit) {
+    override fun getItemCount(): Int = if (images.size >= imageCountLimit) {
         imageCountLimit
     } else {
-        adapterItems.size + 1
+        images.size + 1
     }
 
     private var itemClickListener: OnItemClickListener? = null