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,
- String title,
- List<T> items,
-) async {
+ BuildContext context, String title, List<T> items,
+ {String? tips}) async {
+ List<Widget> widgets = [];
+ 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('$e'),
+ )));
+
  return showDialog<T>(
  context: context,
  builder: (BuildContext context) {
  return SimpleDialog(
  title: Text(title),
- children: items
- .map((e) => SimpleDialogOption(
- onPressed: () {
- Navigator.of(context).pop(e);
- },
- child: Text('$e'),
- ))
- .toList(),
+ children: widgets,
  );
  },
  );

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

@@ -1,35 +1,47 @@
+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,
  );
  }
 
  @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);
  }