...

app/src/main/java/com/highcapable/yukihookapi/demo/InjectNoParamTest.kt

@@ -0,0 +1,46 @@
+/**
+ * MIT License
+ *
+ * Copyright (C) 2022 HighCapable
+ *
+ * This file is part of YukiHookAPI.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * This file is Created by fankes on 2022/2/8.
+ */
+package com.highcapable.yukihookapi.demo
+
+import androidx.annotation.Keep
+
+// for test
+@Keep
+class InjectNoParamTest {
+
+    @Keep
+    private var test = "没有"
+
+    init {
+        test = "没修改的变量"
+    }
+
+    // for test
+    @Keep
+    fun getString() = test
+}

app/src/main/java/com/highcapable/yukihookapi/demo/MainActivity.kt

@@ -63,10 +63,15 @@ class MainActivity : AppCompatActivity() {
                                     .setMessage(InjectLucky().getString() + "\n" + InjectLucky(string = "没更改的文字").getString() + "\n模块是否已激活：${YukiHookModuleStatus.isActive()}")
                                     .setPositiveButton("下一个") { _, _ ->
                                         AlertDialog.Builder(this)
-                                            .setTitle("Hook 构造方法测试(名称)")
-                                            .setMessage(InjectTestName("文字没更改").getString() + "\n模块是否已激活：${YukiHookModuleStatus.isActive()}")
-                                            .setPositiveButton("完成") { _, _ -> toast() }
-                                            .show()
+                                            .setTitle("Hook 构造方法测试(无参)")
+                                            .setMessage(InjectNoParamTest().getString() + "\n模块是否已激活：${YukiHookModuleStatus.isActive()}")
+                                            .setPositiveButton("下一个") { _, _ ->
+                                                AlertDialog.Builder(this)
+                                                    .setTitle("Hook 构造方法测试(名称)")
+                                                    .setMessage(InjectTestName("文字没更改").getString() + "\n模块是否已激活：${YukiHookModuleStatus.isActive()}")
+                                                    .setPositiveButton("完成") { _, _ -> toast() }
+                                                    .show()
+                                            }.show()
                                     }.show()
                             }.show()
                     }.show()

app/src/main/java/com/highcapable/yukihookapi/demo/hook/inject/MainInjecter.kt

@@ -33,10 +33,7 @@ import android.app.AlertDialog
 import android.widget.Toast
 import com.highcapable.yukihookapi.YukiHookAPI
 import com.highcapable.yukihookapi.annotation.xposed.InjectYukiHookWithXposed
-import com.highcapable.yukihookapi.demo.BuildConfig
-import com.highcapable.yukihookapi.demo.InjectLucky
-import com.highcapable.yukihookapi.demo.InjectTest
-import com.highcapable.yukihookapi.demo.MainActivity
+import com.highcapable.yukihookapi.demo.*
 import com.highcapable.yukihookapi.hook.factory.encase
 import com.highcapable.yukihookapi.hook.factory.findMethod
 import com.highcapable.yukihookapi.hook.type.ActivityClass
@@ -124,6 +121,17 @@ class MainInjecter : YukiHookXposedInitProxy {
                         beforeHook { args().set("构造方法已被 Hook 成功") }
                     }
                 }
+                InjectNoParamTest::class.java.hook {
+                    injectMember {
+                        constructor()
+                        afterHook {
+                            field {
+                                name = "test"
+                                type = StringType
+                            }.set(instance, "内容被改掉了")
+                        }
+                    }
+                }
                 findClass(name = "$packageName.InjectTestName").hook {
                     injectMember {
                         constructor { param(StringType) }

yukihookapi/src/api/kotlin/com/highcapable/yukihookapi/hook/core/YukiHookCreater.kt

@@ -176,7 +176,7 @@ class YukiHookCreater(private val packageParam: PackageParam, val hookClass: Cla
          * @param initiate 方法体
          * @return [ConstructorFinder.Result]
          */
-        fun constructor(initiate: ConstructorFinder.() -> Unit): ConstructorFinder.Result {
+        fun constructor(initiate: ConstructorFinder.() -> Unit = {}): ConstructorFinder.Result {
             hookAllMembers = HookAllMembers.HOOK_NONE
             isHookMemberSetup = true
             return ConstructorFinder(hookInstance = this, hookClass).apply(initiate).build()