Add QR code sharing for URL profiles

app/src/main/java/com/github/kr328/clash/ProfilesActivity.kt

@@ -75,6 +75,8 @@ class ProfilesActivity : BaseActivity<ProfilesDesign>() {
 
                             startActivity(PropertiesActivity::class.intent.setUUID(uuid))
                         }
+                        is ProfilesDesign.Request.ShareQrCode ->
+                            design.showProfileQrCode(it.profile)
                     }
                 }
                 if (activityStarted) {
@@ -124,4 +126,4 @@ class ProfilesActivity : BaseActivity<ProfilesDesign>() {
             }
         }
     }
-}
+}

design/build.gradle.kts

@@ -18,4 +18,5 @@ dependencies {
     implementation(libs.androidx.fragment)
     implementation(libs.androidx.viewpager)
     implementation(libs.google.material)
+    implementation(libs.zxing.core)
 }

design/src/main/java/com/github/kr328/clash/design/ProfilesDesign.kt

@@ -2,19 +2,29 @@ package com.github.kr328.clash.design
 
 import android.app.Dialog
 import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.Color
 import android.view.View
 import android.view.ViewGroup
 import android.view.animation.Animation
 import android.view.animation.AnimationUtils
 import com.github.kr328.clash.design.adapter.ProfileAdapter
 import com.github.kr328.clash.design.databinding.DesignProfilesBinding
 import com.github.kr328.clash.design.databinding.DialogProfilesMenuBinding
+import com.github.kr328.clash.design.databinding.DialogProfileQrCodeBinding
 import com.github.kr328.clash.design.dialog.AppBottomSheetDialog
 import com.github.kr328.clash.design.ui.ToastDuration
 import com.github.kr328.clash.design.util.*
 import com.github.kr328.clash.service.model.Profile
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import com.google.zxing.BarcodeFormat
+import com.google.zxing.EncodeHintType
+import com.google.zxing.WriterException
+import com.google.zxing.qrcode.QRCodeWriter
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.suspendCancellableCoroutine
 import kotlinx.coroutines.withContext
+import kotlin.coroutines.resume
 
 class ProfilesDesign(context: Context) : Design<ProfilesDesign.Request>(context) {
     sealed class Request {
@@ -24,6 +34,7 @@ class ProfilesDesign(context: Context) : Design<ProfilesDesign.Request>(context)
         data class Update(val profile: Profile) : Request()
         data class Edit(val profile: Profile) : Request()
         data class Duplicate(val profile: Profile) : Request()
+        data class ShareQrCode(val profile: Profile) : Request()
         data class Delete(val profile: Profile) : Request()
     }
 
@@ -135,11 +146,55 @@ class ProfilesDesign(context: Context) : Design<ProfilesDesign.Request>(context)
         dialog.dismiss()
     }
 
+    fun requestShareQrCode(dialog: Dialog, profile: Profile) {
+        requests.trySend(Request.ShareQrCode(profile))
+
+        dialog.dismiss()
+    }
+
+    suspend fun showProfileQrCode(profile: Profile) {
+        if (profile.type != Profile.Type.Url || profile.source.isBlank()) return
+
+        val bitmap = try {
+            withContext(Dispatchers.Default) {
+                val matrix = QRCodeWriter().encode(
+                    profile.source, BarcodeFormat.QR_CODE, 768, 768,
+                    mapOf(EncodeHintType.CHARACTER_SET to "UTF-8")
+                )
+                val pixels = IntArray(matrix.width * matrix.height) { index ->
+                    if (matrix[index % matrix.width, index / matrix.width]) Color.BLACK else Color.WHITE
+                }
+                Bitmap.createBitmap(pixels, matrix.width, matrix.height, Bitmap.Config.ARGB_8888)
+            }
+        } catch (_: WriterException) {
+            showToast(R.string.qr_code_generation_failed, ToastDuration.Long)
+            return
+        }
+
+        withContext(Dispatchers.Main) {
+            val binding = DialogProfileQrCodeBinding.inflate(context.layoutInflater)
+            binding.qrCode.setImageBitmap(bitmap)
+
+            suspendCancellableCoroutine<Unit> { continuation ->
+                val dialog = MaterialAlertDialogBuilder(context)
+                    .setTitle(R.string.share_qr_code)
+                    .setView(binding.root)
+                    .setPositiveButton(R.string.close) { _, _ -> }
+                    .setOnDismissListener {
+                        if (continuation.isActive) continuation.resume(Unit)
+                    }
+                    .show()
+
+                continuation.invokeOnCancellation { dialog.dismiss() }
+            }
+        }
+    }
+
     private fun changeUpdateAllButtonStatus() {
         if (allUpdating) {
             binding.updateView.startAnimation(rotateAnimation)
         } else {
             binding.updateView.clearAnimation()
         }
     }
-}
+}

design/src/main/res/layout/dialog_profile_qr_code.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android">
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:padding="@dimen/dialog_padding">
+
+        <ImageView
+            android:id="@+id/qr_code"
+            android:layout_width="match_parent"
+            android:layout_height="240dp"
+            android:background="@android:color/white"
+            android:contentDescription="@string/share_qr_code"
+            android:forceDarkAllowed="false"
+            android:scaleType="fitCenter" />
+    </ScrollView>
+</layout>

design/src/main/res/layout/dialog_profiles_menu.xml

@@ -47,6 +47,15 @@
             app:icon="@drawable/ic_baseline_content_copy"
             app:text="@string/duplicate" />
 
+        <com.github.kr328.clash.design.view.LargeActionLabel
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="@{() -> master.requestShareQrCode(self, profile)}"
+            android:padding="@dimen/bottom_sheet_menu_items_padding"
+            android:visibility="@{profile.imported &amp;&amp; profile.type == Type.Url &amp;&amp; !profile.source.isEmpty() ? View.VISIBLE : View.GONE}"
+            app:icon="@drawable/baseline_qr_code_scanner"
+            app:text="@string/share_qr_code" />
+
         <com.github.kr328.clash.design.view.LargeActionLabel
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -56,4 +65,4 @@
             app:icon="@drawable/ic_outline_delete"
             app:text="@string/delete" />
     </LinearLayout>
-</layout>
+</layout>

design/src/main/res/values-ja-rJP/strings.xml

@@ -66,6 +66,8 @@
     <string name="import_">インポート</string>
     <string name="properties">プロパティ</string>
     <string name="duplicate">複製</string>
+    <string name="share_qr_code">QRコードで共有</string>
+    <string name="qr_code_generation_failed">このリンクのQRコードを生成できません。</string>
     <string name="active_unsaved_tips">プロファイルを有効にする前に保存する必要があります</string>
     <string name="exit_without_save">保存せずに閉じる</string>
     <string name="exit_without_save_warning">すべての変更は失われます</string>

design/src/main/res/values-ko-rKR/strings.xml

@@ -66,6 +66,8 @@
     <string name="import_">가져오기</string>
     <string name="properties">속성</string>
     <string name="duplicate">복제</string>
+    <string name="share_qr_code">QR 코드로 공유</string>
+    <string name="qr_code_generation_failed">이 링크의 QR 코드를 생성할 수 없습니다.</string>
     <string name="active_unsaved_tips">활성화하기 전에 구성 파일을 저장해야합니다.</string>
     <string name="exit_without_save">저장없이 종료</string>
     <string name="exit_without_save_warning">모든 변경 사항이 저장되지 않습니다.</string>

design/src/main/res/values-ru/strings.xml

@@ -76,6 +76,8 @@
     <string name="import_">Импорт</string>
     <string name="properties">Свойства</string>
     <string name="duplicate">Создать копию</string>
+    <string name="share_qr_code">Поделиться QR-кодом</string>
+    <string name="qr_code_generation_failed">Не удалось создать QR-код для этой ссылки.</string>
     <string name="active_unsaved_tips">Профиль должен быть сохранён перед активацией</string>
 
     <string name="exit_without_save">Выйти без сохранения</string>

design/src/main/res/values-vi/strings.xml

@@ -90,6 +90,8 @@
     <string name="donate">Quyên góp</string>
     <string name="dont_modify">Chưa sửa đổi</string>
     <string name="duplicate">Tạo bản sao</string>
+    <string name="share_qr_code">Chia sẻ mã QR</string>
+    <string name="qr_code_generation_failed">Không thể tạo mã QR cho liên kết này.</string>
     <string name="edit">Sửa</string>
     <string name="empty">Trống</string>
     <string name="empty_name">Tên trống</string>

design/src/main/res/values-zh-rHK/strings.xml

@@ -25,6 +25,8 @@
     <string name="dns_hijacking">DNS 劫持</string>
     <string name="dns_hijacking_summary">處理所有 DNS 數據包</string>
     <string name="duplicate">複製</string>
+    <string name="share_qr_code">二維碼分享</string>
+    <string name="qr_code_generation_failed">無法為此連結產生二維碼。</string>
     <string name="edit">編輯</string>
     <string name="empty_name">空名稱</string>
     <string name="exit_without_save">退出而不保存</string>

design/src/main/res/values-zh-rTW/strings.xml

@@ -25,6 +25,8 @@
     <string name="dns_hijacking">DNS 攔截攻擊</string>
     <string name="dns_hijacking_summary">處理所有 DNS 封包</string>
     <string name="duplicate">複製</string>
+    <string name="share_qr_code">分享 QR 碼</string>
+    <string name="qr_code_generation_failed">無法為此連結產生 QR 碼。</string>
     <string name="edit">編輯</string>
     <string name="empty_name">空白名稱</string>
     <string name="exit_without_save">退出而不儲存</string>

design/src/main/res/values-zh/strings.xml

@@ -25,6 +25,8 @@
     <string name="dns_hijacking">DNS 劫持</string>
     <string name="dns_hijacking_summary">处理所有 DNS 数据包</string>
     <string name="duplicate">复制</string>
+    <string name="share_qr_code">二维码分享</string>
+    <string name="qr_code_generation_failed">无法为此链接生成二维码。</string>
     <string name="edit">编辑</string>
     <string name="empty_name">空名称</string>
     <string name="exit_without_save">退出而不保存</string>

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

@@ -84,6 +84,8 @@
     <string name="import_">Import</string>
     <string name="properties">Properties</string>
     <string name="duplicate">Duplicate</string>
+    <string name="share_qr_code">Share QR code</string>
+    <string name="qr_code_generation_failed">Unable to generate a QR code for this link.</string>
     <string name="active_unsaved_tips">Profile needs to be saved before activation</string>
 
     <string name="exit_without_save">Exit without Save</string>

gradle/libs.versions.toml

@@ -17,6 +17,7 @@ kaidl = "1.15"
 room = "2.4.2"
 multiprocess = "1.0.0"
 quickie = "1.11.0"
+zxing = "3.5.3"
 androidx-activity-ktx = "1.9.0"
 
 [libraries]
@@ -42,6 +43,7 @@ kaidl-compiler = { module = "com.github.kr328.kaidl:kaidl", version.ref = "kaidl
 kaidl-runtime = { module = "com.github.kr328.kaidl:kaidl-runtime", version.ref = "kaidl" }
 rikkax-multiprocess = { module = "dev.rikka.rikkax.preference:multiprocess", version.ref = "multiprocess" }
 quickie-bundled = { group = "io.github.g00fy2.quickie", name = "quickie-bundled", version.ref = "quickie" }
+zxing-core = { module = "com.google.zxing:core", version.ref = "zxing" }
 androidx-activity-ktx = { group = "androidx.activity", name = "activity-ktx", version.ref = "androidx-activity-ktx" }
 
 [plugins]