fix: 修复界面更新相关的崩溃问题

- 在 `DownloadsScene` 中，添加了 `isAdded()` 检查，以避免在 Fragment 未附加到 Activity 时更新适配器或处理回调，从而防止崩溃。
- 在 `DownloadAdapter` 中，增强了 `LayoutInflater` 的获取逻辑。在获取失败时，会尝试从 Context 或 Activity 中获取，以防止因 Fragment 状态异常而导致的 `NullPointerException` 或 `IllegalStateException`。
- 在 `UpdateDialog` 中，增加了对 Activity 生命周期的检查（`isFinishing`/`isDestroyed`），以确保只在 Activity 处于活动状态时才显示对话框，避免 `WindowLeaked` 异常。

Author: xiaojieonly

app/src/main/java/com/hippo/ehviewer/ui/dialog/UpdateDialog.kt

@@ -41,10 +41,16 @@ class UpdateDialog(private val activity: Activity) {
     private var myDownloadId by Delegates.notNull<Long>()
     private var downloadReceiver: DownloadReceiver? = null
 
+    private fun isActivityAlive(): Boolean {
+        return !(activity.isFinishing || activity.isDestroyed)
+    }
 
     fun showCheckFailDialog() {
         try {
             ContextCompat.getMainExecutor(activity).execute {
+                if (!isActivityAlive()) {
+                    return@execute
+                }
                 val alertDialog = AlertDialog.Builder(activity)
                     .setIcon(R.mipmap.ic_launcher)
                     .setTitle(R.string.update_fail)
@@ -56,7 +62,9 @@ class UpdateDialog(private val activity: Activity) {
                         dialog.dismiss()
                     }
                     .create()
-                alertDialog.show()
+                if (isActivityAlive()) {
+                    alertDialog.show()
+                }
             }
         } catch (e: Exception) {
             Analytics.recordException(e)
@@ -78,6 +86,9 @@ class UpdateDialog(private val activity: Activity) {
 
             val downloadUrl = updateContent.getString(AppUpdater.FILE_DOWNLOAD_URL)
             ContextCompat.getMainExecutor(activity).execute {
+                if (!isActivityAlive()) {
+                    return@execute
+                }
                 val alertDialog = AlertDialog.Builder(activity).apply {
                     setIcon(R.mipmap.ic_launcher)
                     setTitle(title)
@@ -95,7 +106,9 @@ class UpdateDialog(private val activity: Activity) {
                         setCancelable(false)
                     }
                 }.create()
-                alertDialog.show()
+                if (isActivityAlive()) {
+                    alertDialog.show()
+                }
             }
         } catch (e: Exception) {
             Analytics.recordException(e)

app/src/main/java/com/hippo/ehviewer/ui/scene/download/DownloadsScene.java

@@ -1326,6 +1326,10 @@ private void gotoFilterAndSort(int id) {
     }
 
     private void updateAdapter() {
+        // 检查 Fragment 是否已附加，如果未附加则延迟创建适配器
+        if (!isAdded()) {
+            return;
+        }
         mOriginalAdapter = new DownloadAdapter(this, this);
         mOriginalAdapter.setHasStableIds(true);
         // 避免重复创建包装适配器，直接使用原始适配器
@@ -1366,6 +1370,10 @@ public boolean forceShowSearchBar() {
 
     @Override
     public void onDownloadSearchSuccess(List<DownloadInfo> list) {
+        // 检查 Fragment 是否已附加，如果未附加则忽略回调
+        if (!isAdded()) {
+            return;
+        }
         mList = list;
         updateAdapter();
         mProgressView.setVisibility(View.GONE);
@@ -1378,6 +1386,10 @@ public void onDownloadSearchSuccess(List<DownloadInfo> list) {
 
     @Override
     public void onDownloadListHandleSuccess(List<DownloadInfo> list) {
+        // 检查 Fragment 是否已附加，如果未附加则忽略回调
+        if (!isAdded()) {
+            return;
+        }
         mList = list;
         updateAdapter();
         mProgressView.setVisibility(View.GONE);

app/src/main/java/com/hippo/ehviewer/ui/scene/download/part/DownloadAdapter.java

@@ -17,6 +17,7 @@
 package com.hippo.ehviewer.ui.scene.download.part;
 
 import android.annotation.SuppressLint;
+import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Resources;
@@ -112,8 +113,20 @@ public DownloadAdapter(DownloadsScene scene, DownloadAdapterCallback callback) {
         LayoutInflater mInflater1;
         try {
             mInflater1 = scene.getLayoutInflater2();
-        } catch (NullPointerException e) {
-            mInflater1 = scene.getLayoutInflater();
+        } catch (NullPointerException | IllegalStateException e) {
+            // Fragment 可能还未附加到 FragmentManager，使用 Context 获取 LayoutInflater
+            Context context = scene.getContext();
+            if (context != null) {
+                mInflater1 = LayoutInflater.from(context);
+            } else {
+                // 如果 Context 也为 null，尝试使用 Activity
+                Activity activity = scene.getActivity();
+                if (activity != null) {
+                    mInflater1 = LayoutInflater.from(activity);
+                } else {
+                    throw new IllegalStateException("Cannot get LayoutInflater: Fragment is not attached and Context/Activity is null");
+                }
+            }
         }
         mInflater = mInflater1;
         AssertUtils.assertNotNull(mInflater);