resize large image

android/app/src/main/kotlin/niuhuan/pikapi/MainActivity.kt

@@ -3,11 +3,13 @@ package niuhuan.pikapi
 import android.content.ContentValues
 import android.graphics.Bitmap
 import android.graphics.BitmapFactory
+import android.graphics.Matrix
 import android.os.Build
 import android.os.Environment
 import android.os.Handler
 import android.os.Looper
 import android.provider.MediaStore
+import android.util.DisplayMetrics
 import android.util.Log
 import android.view.Display
 import android.view.KeyEvent
@@ -23,6 +25,7 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.newSingleThreadContext
 import kotlinx.coroutines.sync.Mutex
 import mobile.Mobile
+import java.io.ByteArrayOutputStream
 import java.io.File
 import java.io.FileInputStream
 import java.io.FileOutputStream
@@ -100,6 +103,7 @@ class MainActivity : FlutterActivity() {
                     // 获取可以迁移数据地址
                     "androidGetExtendDirs" -> androidGetExtendDirs()
                     "androidSecureFlag" -> androidSecureFlag(call.argument("flag")!!)
+                    "convertToPNG" -> convertToPNG(call.argument("path")!!)
                     else -> {
                         notImplementedToken
                     }
@@ -350,4 +354,36 @@ class MainActivity : FlutterActivity() {
         }
     }
 
+    private fun convertToPNG(path: String): ByteArray {
+        BitmapFactory.decodeFile(path)?.let { bitmap ->
+            val maxWidth =
+                    when {
+                        Build.VERSION.SDK_INT >= Build.VERSION_CODES.R -> windowManager.currentWindowMetrics.bounds.width()
+                        Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1 -> {
+                            val displayMetrics = DisplayMetrics()
+                            windowManager.defaultDisplay.getRealMetrics(displayMetrics)
+                            displayMetrics.widthPixels
+                        }
+                        else -> throw Exception("not support")
+                    }
+            if (bitmap.width > maxWidth) {
+                val newHeight = maxWidth * bitmap.height / bitmap.width
+                val newImage = Bitmap.createScaledBitmap(bitmap, maxWidth, newHeight, true)
+                return compressBitMap(newImage)
+            }
+            return compressBitMap(bitmap)
+        }
+        throw Exception("error pic")
+    }
+
+    private fun compressBitMap(bitmap: Bitmap): ByteArray {
+        val bos = ByteArrayOutputStream()
+        bos.use { bos ->
+            Log.d("BITMAP", bitmap.width.toString())
+            bitmap.compress(Bitmap.CompressFormat.PNG, 100, bos)
+        }
+        return bos.toByteArray()
+    }
+
+
 }

lib/basic/Common.dart

@@ -95,23 +95,30 @@ List<T> filteredList<T>(List<T> list, bool Function(T) filter) {
 
 /// 创建一个单选对话框, 用户取消选择返回null, 否则返回所选内容
 Future<T?> chooseListDialog<T>(
-  BuildContext context,
+    BuildContext context, String title, List<T> items,
-  String title,
+    {String? tips}) async {
-  List<T> items,
+  List<Widget> widgets = [];
-) async {
+  if (tips != null) {
+    widgets.add(
+      Container(
+        padding: EdgeInsets.fromLTRB(15, 5, 15, 15),
+        child: Text(tips),
+      )
+    );
+  }
+  widgets.addAll(items.map((e) => SimpleDialogOption(
+        onPressed: () {
+          Navigator.of(context).pop(e);
+        },
+        child: Text('$e'),
+      )));
+
   return showDialog<T>(
     context: context,
     builder: (BuildContext context) {
       return SimpleDialog(
         title: Text(title),
-        children: items
+        children: widgets,
-            .map((e) => SimpleDialogOption(
-                  onPressed: () {
-                    Navigator.of(context).pop(e);
-                  },
-                  child: Text('$e'),
-                ))
-            .toList(),
       );
     },
   );

lib/basic/Method.dart

@@ -1,4 +1,5 @@
 import 'dart:convert';
+import 'dart:typed_data';
 
 import 'package:flutter/services.dart';
 import 'package:pikapi/basic/Entities.dart';
@@ -607,4 +608,9 @@ class Method {
       "comicId": comicId,
     });
   }
+
+  /// 转化为PNG
+  Future<Uint8List> convertToPNG(String path) async {
+    return await _channel.invokeMethod("convertToPNG", {"path": path});
+  }
 }

lib/basic/config/ConvertToPNG.dart

@@ -0,0 +1,48 @@
+import 'dart:io';
+
+import 'package:flutter/material.dart';
+
+import '../Common.dart';
+import '../Method.dart';
+
+const _propertyName = "convertToPNG";
+var _convertToPNG = false;
+
+Future initConvertToPNG() async {
+  if (Platform.isAndroid) {
+    _convertToPNG =
+        (await method.loadProperty(_propertyName, "false")) == "true";
+  }
+}
+
+bool convertToPNG() {
+  return _convertToPNG;
+}
+
+Future<void> _chooseConvertToPNGSetting(BuildContext context) async {
+  String? result = await chooseListDialog<String>(context, "超大图片缩放", ["是", "否"],
+      tips: "会增加耗电\n可以解决部分漫画崩溃的问题");
+  if (result != null) {
+    var target = result == "是";
+    await method.saveProperty(_propertyName, "$target");
+    _convertToPNG = target;
+  }
+}
+
+Widget convertToPNGSetting() {
+  if (Platform.isAndroid) {
+    return StatefulBuilder(
+      builder: (BuildContext context, void Function(void Function()) setState) {
+        return ListTile(
+          title: Text("读取到超大图片时进行缩放(防止崩溃)"),
+          subtitle: Text(_convertToPNG ? "是" : "否"),
+          onTap: () async {
+            await _chooseConvertToPNGSetting(context);
+            setState(() {});
+          },
+        );
+      },
+    );
+  }
+  return Container();
+}

lib/screens/InitScreen.dart

@@ -6,6 +6,7 @@ import 'package:pikapi/basic/config/AutoClean.dart';
 import 'package:pikapi/basic/config/AutoFullScreen.dart';
 import 'package:pikapi/basic/config/ChooserRoot.dart';
 import 'package:pikapi/basic/config/ContentFailedReloadAction.dart';
+import 'package:pikapi/basic/config/ConvertToPNG.dart';
 import 'package:pikapi/basic/config/DownloadAndExportPath.dart';
 import 'package:pikapi/basic/config/DownloadThreadCount.dart';
 import 'package:pikapi/basic/config/FullScreenAction.dart';
@@ -67,6 +68,7 @@ class _InitScreenState extends State<InitScreen> {
     await initDownloadAndExportPath();
     await initAndroidSecureFlag();
     await initDownloadThreadCount();
+    await initConvertToPNG();
     // 登录, 如果token失效重新登录, 网络不好的时候可能需要1分钟
     if (await method.preLogin()) {
       // 如果token或username+password有效则直接进入登录好的界面

lib/screens/SettingsScreen.dart

@@ -9,6 +9,7 @@ import 'package:pikapi/basic/config/AutoClean.dart';
 import 'package:pikapi/basic/config/AutoFullScreen.dart';
 import 'package:pikapi/basic/config/ChooserRoot.dart';
 import 'package:pikapi/basic/config/ContentFailedReloadAction.dart';
+import 'package:pikapi/basic/config/ConvertToPNG.dart';
 import 'package:pikapi/basic/config/DownloadAndExportPath.dart';
 import 'package:pikapi/basic/config/DownloadThreadCount.dart';
 import 'package:pikapi/basic/config/FullScreenAction.dart';
@@ -37,6 +38,7 @@ class SettingsScreen extends StatelessWidget {
             NetworkSetting(),
             Divider(),
             qualitySetting(),
+            convertToPNGSetting(),
             readerTypeSetting(),
             readerDirectionSetting(),
             autoFullScreenSetting(),

lib/screens/components/Images.dart

@@ -1,20 +1,31 @@
+import 'dart:typed_data';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_svg/flutter_svg.dart';
 import 'package:pikapi/basic/Method.dart';
 import 'package:flutter_svg/svg.dart';
+import 'package:pikapi/basic/config/ConvertToPNG.dart';
 import 'dart:io';
 import 'dart:ui' as ui show Codec;
 
+Future<Uint8List> _loadImageFile(String path) {
+  if (convertToPNG()) {
+    return method.convertToPNG(path);
+  }
+  return File(path).readAsBytes();
+}
+
 // 从本地加载图片
-class ResourceFileImageProvider extends ImageProvider<ResourceFileImageProvider> {
+class ResourceFileImageProvider
+    extends ImageProvider<ResourceFileImageProvider> {
   final String path;
   final double scale;
 
   ResourceFileImageProvider(this.path, {this.scale = 1.0});
 
   @override
-  ImageStreamCompleter load(ResourceFileImageProvider key, DecoderCallback decode) {
+  ImageStreamCompleter load(
+      ResourceFileImageProvider key, DecoderCallback decode) {
     return MultiFrameImageStreamCompleter(
       codec: _loadAsync(key),
       scale: key.scale,
@@ -22,14 +33,15 @@ class ResourceFileImageProvider extends ImageProvider<ResourceFileImageProvider>
   }
 
   @override
-  Future<ResourceFileImageProvider> obtainKey(ImageConfiguration configuration) {
+  Future<ResourceFileImageProvider> obtainKey(
+      ImageConfiguration configuration) {
     return SynchronousFuture<ResourceFileImageProvider>(this);
   }
 
   Future<ui.Codec> _loadAsync(ResourceFileImageProvider key) async {
     assert(key == this);
     return PaintingBinding.instance!
-        .instantiateImageCodec(await File(path).readAsBytes());
+        .instantiateImageCodec(await _loadImageFile(path));
   }
 
   @override
@@ -96,7 +108,8 @@ class ResourceDownloadFileImageProvider
 }
 
 // 从远端加载图片 暂时未使用 (现在都是先获取路径然后再通过file显示)
-class ResourceRemoteImageProvider extends ImageProvider<ResourceRemoteImageProvider> {
+class ResourceRemoteImageProvider
+    extends ImageProvider<ResourceRemoteImageProvider> {
   final String fileServer;
   final String path;
   final double scale;
@@ -113,7 +126,8 @@ class ResourceRemoteImageProvider extends ImageProvider<ResourceRemoteImageProvi
   }
 
   @override
-  Future<ResourceRemoteImageProvider> obtainKey(ImageConfiguration configuration) {
+  Future<ResourceRemoteImageProvider> obtainKey(
+      ImageConfiguration configuration) {
     return SynchronousFuture<ResourceRemoteImageProvider>(this);
   }