Init commit

.gitignore

@@ -0,0 +1,50 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties
+
+# Gradle files
+.gradle/
+build/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Log/OS Files
+*.log
+
+# Android Studio generated files and folders
+captures/
+.externalNativeBuild/
+.cxx/
+*.aab
+*.apk
+output-metadata.json
+
+# IntelliJ
+*.iml
+.idea/
+misc.xml
+deploymentTargetDropDown.xml
+render.experimental.xml
+
+# Keystore files
+*.jks
+*.keystore
+
+# Google Services (e.g. APIs or Firebase)
+google-services.json
+
+# Android Profiling
+*.hprof

app/.gitignore

@@ -0,0 +1 @@
+/build

app/build.gradle.kts

@@ -0,0 +1,51 @@
+plugins {
+    alias(libs.plugins.android.application)
+}
+
+android {
+    namespace = "moe.fuquan.einkdither"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "moe.fuquan.einkdither"
+        minSdk = 16
+        targetSdk = 34
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        externalNativeBuild {
+            cmake {
+                cppFlags += ""
+            }
+        }
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    externalNativeBuild {
+        cmake {
+            path = file("src/main/cpp/CMakeLists.txt")
+            version = "3.22.1"
+        }
+    }
+    ndkVersion = "19.2.5345600"
+}
+
+dependencies {
+
+    implementation(libs.appcompat)
+    implementation(libs.material)
+    compileOnly(libs.xposed)
+}

app/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.EinkDither"
+        tools:targetApi="31" >
+
+        <meta-data android:name="xposedmodule" android:value="true"/>
+        <meta-data android:name="xposeddescription" android:value="Global image dithering for e-ink displays"/>
+        <meta-data android:name="xposedminversion" android:value="53"/>
+    </application>
+
+</manifest>

app/src/main/assets/xposed_init

@@ -0,0 +1 @@
+moe.fuquan.einkdither.DitherHook

app/src/main/cpp/CMakeLists.txt

@@ -0,0 +1,39 @@
+
+# For more information about using CMake with Android Studio, read the
+# documentation: https://d.android.com/studio/projects/add-native-code.html.
+# For more examples on how to use CMake, see https://github.com/android/ndk-samples.
+
+# Sets the minimum CMake version required for this project.
+cmake_minimum_required(VERSION 3.22.1)
+
+# Declares the project name. The project name can be accessed via ${ PROJECT_NAME},
+# Since this is the top level CMakeLists.txt, the project name is also accessible
+# with ${CMAKE_PROJECT_NAME} (both CMake variables are in-sync within the top level
+# build script scope).
+project("einkdither")
+
+# Creates and names a library, sets it as either STATIC
+# or SHARED, and provides the relative paths to its source code.
+# You can define multiple libraries, and CMake builds them for you.
+# Gradle automatically packages shared libraries with your APK.
+#
+# In this top level CMakeLists.txt, ${CMAKE_PROJECT_NAME} is used to define
+# the target library name; in the sub-module's CMakeLists.txt, ${PROJECT_NAME}
+# is preferred for the same purpose.
+#
+# In order to load a library into your app from Java/Kotlin, you must call
+# System.loadLibrary() and pass the name of the library defined here;
+# for GameActivity/NativeActivity derived applications, the same library name must be
+# used in the AndroidManifest.xml file.
+add_library(${CMAKE_PROJECT_NAME} SHARED
+    # List C/C++ source files with relative paths to this CMakeLists.txt.
+    einkdither.cpp)
+
+# Specifies libraries CMake should link to your target library. You
+# can link libraries from various origins, such as libraries defined in this
+# build script, prebuilt third-party libraries, or Android system libraries.
+target_link_libraries(${CMAKE_PROJECT_NAME}
+    # List libraries link to the target library
+    android
+    jnigraphics
+    log)

app/src/main/cpp/einkdither.cpp

@@ -0,0 +1,89 @@
+#include <jni.h>
+#include <android/bitmap.h>
+#include <android/log.h>
+#include <cstdint>
+#include <cstring>
+#include <algorithm>
+
+#define LOG_TAG "EinkDither"
+#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)
+
+template <typename T>
+static inline T clamp(T val, T minVal, T maxVal) {
+    return (val < minVal) ? minVal : (val > maxVal) ? maxVal : val;
+}
+
+int quantizeTo16Levels(int gray) {
+    return (gray * 15 + 127) / 255 * 17;
+}
+
+extern "C"
+JNIEXPORT jobject JNICALL
+Java_moe_fuquan_einkdither_DitherUtils_applyDithering(JNIEnv *env, jclass clazz, jobject bitmap) {
+    if (bitmap == nullptr) return nullptr;
+
+    AndroidBitmapInfo info;
+    void* pixels = nullptr;
+
+    if (AndroidBitmap_getInfo(env, bitmap, &info) < 0){
+        LOGE("AndroidBitmap_getInfo failed");
+        return bitmap;
+    }
+//    if (info.format != ANDROID_BITMAP_FORMAT_RGBA_8888) return bitmap;
+    if (AndroidBitmap_lockPixels(env, bitmap, &pixels) < 0){
+        LOGE("AndroidBitmap_getInfo failed");
+        return bitmap;
+    }
+
+    int width = info.width;
+    int height = info.height;
+    uint32_t* line = (uint32_t*)pixels;
+
+    // 转换为灰度数组
+    int** gray = new int*[height];
+    for (int y = 0; y < height; y++) {
+        gray[y] = new int[width];
+        for (int x = 0; x < width; x++) {
+            uint32_t pixel = line[y * width + x];
+            int alpha = (pixel >> 24) & 0xFF;
+            int r = (pixel >> 16) & 0xFF;
+            int g = (pixel >> 8) & 0xFF;
+            int b = (pixel) & 0xFF;
+
+            if (alpha == 0)
+                gray[y][x] = -1;
+            else
+                gray[y][x] = (r * 299 + g * 587 + b * 114) / 1000;
+        }
+    }
+
+    // Floyd-Steinberg 抖动
+    for (int y = 0; y < height; y++) {
+        for (int x = 0; x < width; x++) {
+            if (gray[y][x] == -1) {
+                line[y * width + x] = 0x00000000;
+                continue;
+            }
+
+            int oldPixel = gray[y][x];
+            int newPixel = quantizeTo16Levels(oldPixel);
+            int error = oldPixel - newPixel;
+            gray[y][x] = newPixel;
+
+            if (x + 1 < width && gray[y][x + 1] != -1)
+                gray[y][x + 1] = clamp(gray[y][x + 1] + error / 2, 0, 255);
+            if (y + 1 < height && gray[y + 1][x] != -1)
+                gray[y + 1][x] = clamp(gray[y + 1][x] + error / 2, 0, 255);
+
+            uint8_t g = gray[y][x];
+            line[y * width + x] = 0xFF000000 | (g << 16) | (g << 8) | g;
+        }
+    }
+
+    // 清理
+    for (int i = 0; i < height; i++) delete[] gray[i];
+    delete[] gray;
+
+    AndroidBitmap_unlockPixels(env, bitmap);
+    return bitmap;
+}

app/src/main/java/moe/fuquan/einkdither/DitherHook.java

@@ -0,0 +1,519 @@
+package moe.fuquan.einkdither;
+
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Color;
+import android.graphics.Matrix;
+import android.graphics.Paint;
+import android.graphics.RectF;
+import android.os.Build;
+import android.util.Log;
+import android.widget.ImageView;
+import android.graphics.Rect;
+import android.graphics.Canvas;
+
+import java.io.File;
+import java.lang.reflect.Method;
+import java.util.Arrays;
+
+import de.robv.android.xposed.IXposedHookLoadPackage;
+import de.robv.android.xposed.IXposedHookZygoteInit;
+import de.robv.android.xposed.XC_MethodHook;
+import de.robv.android.xposed.XposedBridge;
+import de.robv.android.xposed.XposedHelpers;
+import de.robv.android.xposed.callbacks.XC_LoadPackage;
+
+public class DitherHook implements IXposedHookZygoteInit, IXposedHookLoadPackage {
+    // 使用ThreadLocal避免递归调用
+    private static final ThreadLocal<Boolean> isProcessing = new ThreadLocal<Boolean>() {
+        @Override
+        protected Boolean initialValue() {
+            return false;
+        }
+    };
+
+    private static String modulePath;
+
+    String findModuleSo(String soName) {
+        File baseDir = new File(modulePath).getParentFile();
+        File libDir = new File(baseDir, "lib");
+
+        File[] archDirs = libDir.listFiles();
+        if (archDirs != null) {
+            for (File archDir : archDirs) {
+                File candidate = new File(archDir, soName);
+                if (candidate.exists()) {
+                    return candidate.getAbsolutePath();
+                }
+            }
+        }
+        return null;
+    }
+
+    @Override
+    public void initZygote(StartupParam startupParam) throws Throwable {
+        modulePath = startupParam.modulePath;
+    }
+
+    @Override
+    public void handleLoadPackage(final XC_LoadPackage.LoadPackageParam lpparam) throws Throwable {
+        DitherUtils.load(findModuleSo("/libeinkdither.so"));
+
+        XposedBridge.log("EinkDither: Processing package " + lpparam.packageName);
+
+        // Hook Bitmap.createBitmap() 的所有重载方法
+        hookBitmapCreateMethods(lpparam);
+        Log.i
+        // Hook BitmapFactory 的所有decode方法
+        hookBitmapFactoryMethods(lpparam);
+    }
+
+    private void hookBitmapCreateMethods(XC_LoadPackage.LoadPackageParam lpparam) {
+        // 创建通用的hook逻辑
+        XC_MethodHook createBitmapHook = new XC_MethodHook() {
+            @Override
+            protected void afterHookedMethod(MethodHookParam param) throws Throwable {
+                // 检查是否正在处理中，避免递归
+                if (isProcessing.get()) {
+                    return;
+                }
+
+                try {
+                    Bitmap result = (Bitmap) param.getResult();
+                    if (result != null && !result.isRecycled() && shouldApplyDithering(result)) {
+                        XposedBridge.log("EinkDither: Applying dithering to created bitmap " + result.getWidth() + "x" + result.getHeight());
+                        
+                        // 设置处理标志
+                        isProcessing.set(true);
+                        
+                        //Bitmap dithered = applyDithering(result);
+                        Bitmap dithered = DitherUtils.applyDithering(result);
+                        if (dithered != null && dithered != result) {
+                            param.setResult(dithered);
+                        }
+                    }
+//                } catch (Throwable t) {
+//                    XposedBridge.log("EinkDither: Error in createBitmap hook: " + t.getMessage());
+                } finally {
+                    // 清除处理标志
+                    isProcessing.set(false);
+                }
+            }
+        };
+
+        try {
+            // Hook 1: createBitmap(int width, int height, Config config)
+            XposedHelpers.findAndHookMethod(
+                    Bitmap.class,
+                    "createBitmap",
+                    int.class, int.class, Bitmap.Config.class,
+                    createBitmapHook
+            );
+
+            // Hook 2: createBitmap(Bitmap source)
+            XposedHelpers.findAndHookMethod(
+                    Bitmap.class,
+                    "createBitmap",
+                    Bitmap.class,
+                    createBitmapHook
+            );
+
+            // Hook 3: createBitmap(Bitmap source, int x, int y, int width, int height)
+            XposedHelpers.findAndHookMethod(
+                    Bitmap.class,
+                    "createBitmap",
+                    Bitmap.class, int.class, int.class, int.class, int.class,
+                    createBitmapHook
+            );
+
+            // Hook 4: createBitmap(Bitmap source, int x, int y, int width, int height, Matrix m, boolean filter)
+            XposedHelpers.findAndHookMethod(
+                    Bitmap.class,
+                    "createBitmap",
+                    Bitmap.class, int.class, int.class, int.class, int.class, Matrix.class, boolean.class,
+                    createBitmapHook
+            );
+
+            // Hook 5: createBitmap(int[] colors, int offset, int stride, int width, int height, Config config)
+            XposedHelpers.findAndHookMethod(
+                    Bitmap.class,
+                    "createBitmap",
+                    int[].class, int.class, int.class, int.class, int.class, Bitmap.Config.class,
+                    createBitmapHook
+            );
+
+            // Hook 6: createBitmap(int[] colors, int width, int height, Config config)
+            XposedHelpers.findAndHookMethod(
+                    Bitmap.class,
+                    "createBitmap",
+                    int[].class, int.class, int.class, Bitmap.Config.class,
+                    createBitmapHook
+            );
+
+            XposedBridge.log("EinkDither: Successfully hooked all Bitmap.createBitmap() methods");
+
+        } catch (Throwable t) {
+            XposedBridge.log("EinkDither: Failed to hook Bitmap.createBitmap(): " + t.getMessage());
+        }
+    }
+
+    private void hookBitmapFactoryMethods(XC_LoadPackage.LoadPackageParam lpparam) {
+        // 创建通用的BitmapFactory hook逻辑
+        XC_MethodHook bitmapFactoryHook = new XC_MethodHook() {
+            @Override
+            protected void afterHookedMethod(MethodHookParam param) throws Throwable {
+                // 检查是否正在处理中，避免递归
+                if (isProcessing.get()) {
+                    return;
+                }
+
+                try {
+                    Bitmap result = (Bitmap) param.getResult();
+                    if (result != null && !result.isRecycled() && shouldApplyDithering(result)) {
+                        XposedBridge.log("EinkDither: Applying dithering to BitmapFactory bitmap " + result.getWidth() + "x" + result.getHeight());
+
+                        // 设置处理标志
+                        isProcessing.set(true);
+
+                        // Bitmap dithered = applyDithering(result);
+                        Bitmap dithered = DitherUtils.applyDithering(result);
+                        if (dithered != null && dithered != result) {
+                            param.setResult(dithered);
+                        }
+                    }
+                } catch (Throwable t) {
+                    XposedBridge.log("EinkDither: Error in BitmapFactory hook: " + t.getMessage());
+                } finally {
+                    // 清除处理标志
+                    isProcessing.set(false);
+                }
+            }
+        };
+
+        try {
+            // Hook BitmapFactory.decodeFile() 方法
+            XposedHelpers.findAndHookMethod(
+                    BitmapFactory.class,
+                    "decodeFile",
+                    String.class,
+                    bitmapFactoryHook
+            );
+
+            XposedHelpers.findAndHookMethod(
+                    BitmapFactory.class,
+                    "decodeFile",
+                    String.class, BitmapFactory.Options.class,
+                    bitmapFactoryHook
+            );
+
+            // Hook BitmapFactory.decodeResource() 方法
+            XposedHelpers.findAndHookMethod(
+                    BitmapFactory.class,
+                    "decodeResource",
+                    android.content.res.Resources.class, int.class,
+                    bitmapFactoryHook
+            );
+
+            XposedHelpers.findAndHookMethod(
+                    BitmapFactory.class,
+                    "decodeResource",
+                    android.content.res.Resources.class, int.class, BitmapFactory.Options.class,
+                    bitmapFactoryHook
+            );
+
+            // Hook BitmapFactory.decodeStream() 方法
+            XposedHelpers.findAndHookMethod(
+                    BitmapFactory.class,
+                    "decodeStream",
+                    java.io.InputStream.class,
+                    bitmapFactoryHook
+            );
+
+            XposedHelpers.findAndHookMethod(
+                    BitmapFactory.class,
+                    "decodeStream",
+                    java.io.InputStream.class, Rect.class, BitmapFactory.Options.class,
+                    bitmapFactoryHook
+            );
+
+            // Hook BitmapFactory.decodeByteArray() 方法
+            XposedHelpers.findAndHookMethod(
+                    BitmapFactory.class,
+                    "decodeByteArray",
+                    byte[].class, int.class, int.class,
+                    bitmapFactoryHook
+            );
+
+            XposedHelpers.findAndHookMethod(
+                    BitmapFactory.class,
+                    "decodeByteArray",
+                    byte[].class, int.class, int.class, BitmapFactory.Options.class,
+                    bitmapFactoryHook
+            );
+
+            // Hook BitmapFactory.decodeFileDescriptor() 方法
+            XposedHelpers.findAndHookMethod(
+                    BitmapFactory.class,
+                    "decodeFileDescriptor",
+                    java.io.FileDescriptor.class,
+                    bitmapFactoryHook
+            );
+
+            XposedHelpers.findAndHookMethod(
+                    BitmapFactory.class,
+                    "decodeFileDescriptor",
+                    java.io.FileDescriptor.class, Rect.class, BitmapFactory.Options.class,
+                    bitmapFactoryHook
+            );
+
+            // Hook BitmapFactory.decodeResourceStream() 方法
+            XposedHelpers.findAndHookMethod(
+                    BitmapFactory.class,
+                    "decodeResourceStream",
+                    android.content.res.Resources.class, android.util.TypedValue.class, 
+                    java.io.InputStream.class, Rect.class, BitmapFactory.Options.class,
+                    bitmapFactoryHook
+            );
+
+            XposedBridge.log("EinkDither: Successfully hooked all BitmapFactory methods");
+
+        } catch (Throwable t) {
+            XposedBridge.log("EinkDither: Failed to hook BitmapFactory methods: " + t.getMessage());
+        }
+    }
+
+    // 判断是否需要应用抖动
+    private boolean shouldApplyDithering(Bitmap bitmap) {
+        if (bitmap == null || bitmap.isRecycled()) {
+            return false;
+        }
+        
+        // 只对足够大的位图应用抖动，避免处理小图标等
+        int width = bitmap.getWidth();
+        int height = bitmap.getHeight();
+        
+        // 可以根据需要调整这个阈值
+        if (width < 64 || height < 64) {
+            return false;
+        }
+        
+        // // 避免处理过大的图片，可能会导致性能问题
+        // if (width > 2048 || height > 2048) {
+        //     return false;
+        // }
+        
+        // 处理所有类型的位图，包括灰度图，因为墨水屏只有16色阶
+        Bitmap.Config config = bitmap.getConfig();
+        
+        // 跳过一些可能有问题的格式
+        if (config == Bitmap.Config.HARDWARE) {
+            XposedBridge.log("EinkDither: Skipping HARDWARE config bitmap");
+            return false;
+        }
+        
+        return config == Bitmap.Config.ARGB_8888 || 
+               config == Bitmap.Config.RGB_565 || 
+               config == Bitmap.Config.ARGB_4444 ||
+               config == Bitmap.Config.ALPHA_8 ||
+               config == null; // 某些情况下config可能为null
+    }
+
+    // Floyd–Steinberg 抖动算法 - 支持16色阶
+    private Bitmap applyDithering(Bitmap src) {
+        if (src == null || src.isRecycled()) {
+            XposedBridge.log("EinkDither: Source bitmap is null or recycled");
+            return src;
+        }
+
+        try {
+            int w = src.getWidth();
+            int h = src.getHeight();
+            
+            if (w <= 0 || h <= 0) {
+                XposedBridge.log("EinkDither: Invalid bitmap dimensions: " + w + "x" + h);
+                return src;
+            }
+            
+            // 根据图片大小选择算法
+            boolean useFastAlgorithm = (w * h > 500000); // 大于500k像素使用快速算法
+            
+            // 检查位图是否可变，如果不可变则创建副本
+            Bitmap workBitmap = src;
+            boolean needsCopy = !src.isMutable();
+            
+            if (needsCopy) {
+                try {
+                    // 使用copy方法而不是createBitmap避免触发hook
+                    workBitmap = src.copy(Bitmap.Config.ARGB_8888, true);
+                    if (workBitmap == null) {
+                        XposedBridge.log("EinkDither: Failed to create mutable copy, trying alternative");
+                        // 尝试其他格式
+                        workBitmap = src.copy(Bitmap.Config.RGB_565, true);
+                        if (workBitmap == null) {
+                            XposedBridge.log("EinkDither: All copy attempts failed");
+                            return src;
+                        }
+                    }
+                } catch (Exception e) {
+                    XposedBridge.log("EinkDither: Exception during copy: " + e.getMessage());
+                    return src;
+                }
+            }
+            
+            if (useFastAlgorithm) {
+                XposedBridge.log("EinkDither: Using fast ordered dithering for large image " + w + "x" + h);
+                return applyOrderedDithering(workBitmap);
+            } else {
+                XposedBridge.log("EinkDither: Using Floyd-Steinberg dithering for image " + w + "x" + h);
+                return applyFloydSteinbergDithering(workBitmap);
+            }
+            
+        } catch (OutOfMemoryError e) {
+            XposedBridge.log("EinkDither: Out of memory during dithering: " + e.getMessage());
+            return src;
+        } catch (Throwable t) {
+            XposedBridge.log("EinkDither: Error in applyDithering: " + t.getMessage());
+            return src; // 出错时返回原图
+        }
+    }
+    
+    // 快速有序抖动算法 - 适合大图片
+    private Bitmap applyOrderedDithering(Bitmap workBitmap) {
+        try {
+            int w = workBitmap.getWidth();
+            int h = workBitmap.getHeight();
+            
+            // 4x4 Bayer矩阵
+            int[][] bayerMatrix = {
+                {0, 8, 2, 10},
+                {12, 4, 14, 6},
+                {3, 11, 1, 9},
+                {15, 7, 13, 5}
+            };
+            
+            for (int y = 0; y < h; y++) {
+                for (int x = 0; x < w; x++) {
+                    try {
+                        int pixel = workBitmap.getPixel(x, y);
+                        int alpha = (pixel >> 24) & 0xff;
+                        
+                        if (alpha == 0) {
+                            workBitmap.setPixel(x, y, 0x00000000);
+                            continue;
+                        }
+                        
+                        int r = (pixel >> 16) & 0xff;
+                        int g = (pixel >> 8) & 0xff;
+                        int b = pixel & 0xff;
+                        
+                        // 转换为灰度
+                        int gray = (r * 299 + g * 587 + b * 114) / 1000;
+                        
+                        // 应用有序抖动
+                        int threshold = bayerMatrix[y % 4][x % 4] * 17; // 17 = 255/15
+                        int quantized = quantizeTo16Levels(gray + threshold - 136); // 136 = 8*17，居中阈值
+                        
+                        int finalColor = 0xFF000000 | (quantized << 16) | (quantized << 8) | quantized;
+                        workBitmap.setPixel(x, y, finalColor);
+                        
+                    } catch (Exception e) {
+                        // 继续处理其他像素
+                    }
+                }
+            }
+            
+            XposedBridge.log("EinkDither: Successfully applied ordered dithering");
+            return workBitmap;
+            
+        } catch (Exception e) {
+            XposedBridge.log("EinkDither: Error in ordered dithering: " + e.getMessage());
+            return workBitmap;
+        }
+    }
+    
+    // Floyd-Steinberg抖动算法 - 适合小图片，效果更好
+    private Bitmap applyFloydSteinbergDithering(Bitmap workBitmap) {
+        try {
+            int w = workBitmap.getWidth();
+            int h = workBitmap.getHeight();
+            
+            // 转换为灰度并应用16色阶抖动
+            int[][] gray = new int[h][w];
+            
+            // 第一步：转换为灰度
+            for (int y = 0; y < h; y++) {
+                for (int x = 0; x < w; x++) {
+                    try {
+                        int pixel = workBitmap.getPixel(x, y);
+                        int alpha = (pixel >> 24) & 0xff;
+                        int r = (pixel >> 16) & 0xff;
+                        int g = (pixel >> 8) & 0xff;
+                        int b = pixel & 0xff;
+                        
+                        // 如果是透明像素，保持透明
+                        if (alpha == 0) {
+                            gray[y][x] = -1; // 标记为透明
+                        } else {
+                            gray[y][x] = (r * 299 + g * 587 + b * 114) / 1000;
+                        }
+                    } catch (Exception e) {
+                        gray[y][x] = 128; // 默认为中灰色
+                    }
+                }
+            }
+            
+            // 第二步：应用Floyd-Steinberg抖动到16色阶
+            for (int y = 0; y < h; y++) {
+                for (int x = 0; x < w; x++) {
+                    try {
+                        if (gray[y][x] == -1) {
+                            // 透明像素保持透明
+                            workBitmap.setPixel(x, y, 0x00000000);
+                            continue;
+                        }
+                        
+                        int oldPixel = gray[y][x];
+                        
+                        // 量化到16个级别
+                        int newPixel = quantizeTo16Levels(oldPixel);
+                        int error = oldPixel - newPixel;
+                        
+                        gray[y][x] = newPixel;
+                        
+                        // 分散误差到相邻像素 - 简化版本，只扩散到右边和下边
+                        if (x + 1 < w && gray[y][x + 1] != -1) {
+                            gray[y][x + 1] = Math.max(0, Math.min(255, gray[y][x + 1] + error / 2));
+                        }
+                        if (y + 1 < h && gray[y + 1][x] != -1) {
+                            gray[y + 1][x] = Math.max(0, Math.min(255, gray[y + 1][x] + error / 2));
+                        }
+                        
+                        // 设置最终像素颜色 - 使用16色阶的灰度值
+                        int finalGray = gray[y][x];
+                        int finalColor = 0xFF000000 | (finalGray << 16) | (finalGray << 8) | finalGray;
+                        workBitmap.setPixel(x, y, finalColor);
+                        
+                    } catch (Exception e) {
+                        // 继续处理其他像素
+                    }
+                }
+            }
+            
+            XposedBridge.log("EinkDither: Successfully applied Floyd-Steinberg dithering");
+            return workBitmap;
+            
+        } catch (Exception e) {
+            XposedBridge.log("EinkDither: Error in Floyd-Steinberg dithering: " + e.getMessage());
+            return workBitmap;
+        }
+    }
+    
+    // 将灰度值量化到16个级别
+    private int quantizeTo16Levels(int grayValue) {
+        // 确保值在有效范围内
+        grayValue = Math.max(0, Math.min(255, grayValue));
+        // 16个级别：0-15，对应灰度值 0, 17, 34, 51, 68, 85, 102, 119, 136, 153, 170, 187, 204, 221, 238, 255
+        int level = Math.round(grayValue * 15.0f / 255.0f);
+        return level * 17; // 17 = 255/15，确保最大值是255
+    }
+}

app/src/main/java/moe/fuquan/einkdither/DitherUtils.java

@@ -0,0 +1,24 @@
+package moe.fuquan.einkdither;
+
+import android.graphics.Bitmap;
+import android.util.Log;
+import de.robv.android.xposed.XposedBridge;
+
+public class DitherUtils {
+//    static {
+//        System.loadLibrary("einkdither");
+//    }
+
+    public static void load(String path) {
+        XposedBridge.log("library path: " + path);
+        try {
+            System.load(path);
+            XposedBridge.log("load Jni library");
+        } catch (Throwable e) {
+            XposedBridge.log(e);
+            XposedBridge.log("load jni library have error ");
+        }
+    }
+
+    public static native Bitmap applyDithering(Bitmap src);
+}

app/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>

app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/values-night/themes.xml

@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.EinkDither" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_200</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/black</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_200</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="21">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>

app/src/main/res/values/colors.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>

app/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">EinkDither</string>
+</resources>

app/src/main/res/values/themes.xml

@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.EinkDither" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="21">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>

app/src/main/res/xml/backup_rules.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample backup rules file; uncomment and customize as necessary.
+   See https://developer.android.com/guide/topics/data/autobackup
+   for details.
+   Note: This file is ignored for devices older that API 31
+   See https://developer.android.com/about/versions/12/backup-restore
+-->
+<full-backup-content>
+    <!--
+   <include domain="sharedpref" path="."/>
+   <exclude domain="sharedpref" path="device.xml"/>
+-->
+</full-backup-content>

app/src/main/res/xml/data_extraction_rules.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample data extraction rules file; uncomment and customize as necessary.
+   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
+   for details.
+-->
+<data-extraction-rules>
+    <cloud-backup>
+        <!-- TODO: Use <include> and <exclude> to control what is backed up.
+        <include .../>
+        <exclude .../>
+        -->
+    </cloud-backup>
+    <!--
+    <device-transfer>
+        <include .../>
+        <exclude .../>
+    </device-transfer>
+    -->
+</data-extraction-rules>

build.gradle.kts

@@ -0,0 +1,4 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+plugins {
+    alias(libs.plugins.android.application) apply false
+}

gradle.properties

@@ -0,0 +1,21 @@
+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. For more details, visit
+# https://developer.android.com/r/tools/gradle-multi-project-decoupled-projects
+# org.gradle.parallel=true
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app's APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Enables namespacing of each library's R class so that its R class includes only the
+# resources declared in the library itself and none from the library's dependencies,
+# thereby reducing the size of the R class for that library
+android.nonTransitiveRClass=true

gradle/libs.versions.toml

@@ -0,0 +1,15 @@
+[versions]
+agp = "8.6.0"
+espressoCore = "3.6.1"
+appcompat = "1.1.0"
+material = "1.1.0"
+xposed = "82"
+
+[libraries]
+appcompat = { group = "androidx.appcompat", name = "appcompat", version.ref = "appcompat" }
+material = { group = "com.google.android.material", name = "material", version.ref = "material" }
+xposed = { group = "de.robv.android.xposed", name = "api", version.ref = "xposed" }
+
+[plugins]
+android-application = { id = "com.android.application", version.ref = "agp" }
+

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Sat May 17 00:25:33 CST 2025
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# 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
+#
+#      https://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.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle.kts

@@ -0,0 +1,24 @@
+pluginManagement {
+    repositories {
+        google {
+            content {
+                includeGroupByRegex("com\\.android.*")
+                includeGroupByRegex("com\\.google.*")
+                includeGroupByRegex("androidx.*")
+            }
+        }
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+        maven("https://api.xposed.info/")
+    }
+}
+
+rootProject.name = "EinkDither"
+include(":app")