feat: 添加FragmentManager低版本的兼容处理

Author: xiaocydx

inputview/src/main/kotlin/com/xiaocydx/inputview/EditorContainer.kt

@@ -32,6 +32,7 @@ import androidx.annotation.VisibleForTesting
  */
 internal class EditorContainer(context: Context) : FrameLayout(context) {
     private val views = mutableMapOf<Editor, View?>()
+    private val compat = FragmentManagerCompat()
     private var lastInsets: WindowInsets? = null
     private var editText: EditTextHolder? = null
     private var isCheckControlImeEnabled = true
@@ -223,6 +224,14 @@ internal class EditorContainer(context: Context) : FrameLayout(context) {
     @Suppress("UNCHECKED_CAST")
     private fun checkedAdapter() = adapter as EditorAdapter<Editor>
 
+    override fun removeViewAt(index: Int) {
+        compat.removeViewAt { super.removeViewAt(index) }
+    }
+
+    override fun addView(child: View?, index: Int) {
+        compat.addView { super.addView(child, index) }
+    }
+
     private data class PendingChange(
         val previous: Editor?,
         var waitDispatchImeShown: Boolean = false

inputview/src/main/kotlin/com/xiaocydx/inputview/FragmentManagerCompat.kt

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2023 xiaocydx
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.xiaocydx.inputview
+
+import androidx.fragment.app.FragmentManager
+
+/**
+ * [FragmentManager]低版本兼容类
+ *
+ * ```
+ * public abstract class FragmentManager {
+ *
+ *      void moveFragmentToExpectedState(@NonNull Fragment f) {
+ *             ...
+ *             final ViewGroup container = f.mContainer;
+ *             int underIndex = container.indexOfChild(underView);
+ *             int viewIndex = container.indexOfChild(f.mView);
+ *             if (viewIndex < underIndex) {
+ *                 container.removeViewAt(viewIndex); // 抛出异常不崩溃
+ *                 container.addView(f.mView, underIndex); // 拦截addView
+ *             }
+ *             ...
+ *      }
+ * }
+ * ```
+ *
+ * @author xcc
+ * @date 2023/12/22
+ */
+internal class FragmentManagerCompat {
+    var interceptAddView = false
+
+    inline fun removeViewAt(action: () -> Unit) {
+        try {
+            action()
+        } catch (e: NullPointerException) {
+            val moveFragmentToExpectedState = e.stackTrace.firstOrNull {
+                it.className == "androidx.fragment.app.FragmentManager"
+                        && it.methodName == "moveFragmentToExpectedState"
+            }
+            interceptAddView = moveFragmentToExpectedState != null
+            if (!interceptAddView) throw e
+        }
+    }
+
+    inline fun addView(action: () -> Unit) {
+        if (!interceptAddView) action()
+        interceptAddView = false
+    }
+}