Kotlin 反映崩溃，将 minifyEnabled 设置为 true。KotlinReflectionInternalError：属性'xxx'未在类 'xxx' 中解析

Question

• 错误日志

  流程：com.sjianjun.test.kotlin.delegate，PID:223730kotlin.reflect.jvm.internal.KotlinReflectionInternalError:属性"delegateTest"(jvm签名：getDelegateTest((Ljava/lang/Object；(在com.sjianjun.test.kotlin.delegate.MainActivity类中未解析位于kotlin.reflect.jvm.internal.KDeclarationContainerImpl.findPropertyDescriptor(：115(

• 主要活动：

@Keep
class MainActivity : AppCompatActivity() {
var delegateTest by DelegateTest()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
this::class.java.declaredMethods.forEach {
Log.e("DelegateTest", it.toString())
}
Log.e("DelegateTest ", delegateTest.toString()+DelegateTest::class.java.name)
delegateTest = 1
Log.e("DelegateTest ", delegateTest.toString())
}
}

• 委托测试：

@Keep
class DelegateTest {
var value: Any? = null
operator fun getValue(thisRef: Any?, property: KProperty<*>): Any {
// crash : property
return "value:$value $property"
}
operator fun setValue(thisRef: Any?, property: KProperty<*>, value: Any) {
this.value = value
}
}

• 前卫：

-keep class com.sjianjun.test.kotlin.delegate.DelegateTest{*;}
-keep class com.sjianjun.test.kotlin.delegate.MainActivity{*;}
-keepclassmembers class com.sjianjun.test.kotlin.delegate.MainActivity{*;}
-keep class kotlin.reflect.**{*;}

• 和日志：

E/kotlin.delegat: Unable to peek into adb socket due to error. Closing socket.: Connection reset by peer
E/DelegateTest: public void com.sjianjun.test.kotlin.delegate.MainActivity._$_clearFindViewByIdCache()
E/DelegateTest: public android.view.View com.sjianjun.test.kotlin.delegate.MainActivity._$_findCachedViewById(int)
E/DelegateTest: public final java.lang.Object com.sjianjun.test.kotlin.delegate.MainActivity.getDelegateTest()
E/DelegateTest: protected void com.sjianjun.test.kotlin.delegate.MainActivity.onCreate(android.os.Bundle)
E/DelegateTest: public final void com.sjianjun.test.kotlin.delegate.MainActivity.setDelegateTest(java.lang.Object)
E/DelegateTest: value:null var com.sjianjun.test.kotlin.delegate.MainActivity.delegateTest: kotlin.Anycom.sjianjun.test.kotlin.delegate.DelegateTest
E/DelegateTest: value:1 var com.sjianjun.test.kotlin.delegate.MainActivity.delegateTest: kotlin.Any

我发现proguard将删除以下字段：

E/DelegateTest: value:null var com.sjianjun.test.kotlin.delegate.MainActivity.delegateTest: kotlin.Anycom.sjianjun.test.kotlin.delegate.DelegateTest
E/DelegateTest: value:1 var com.sjianjun.test.kotlin.delegate.MainActivity.delegateTest: kotlin.Any

我不知道该怎么办。。。

Answer 1

Android gradle插件默认使用R8模糊处理程序。在从Proguard切换到R8后，我遇到了同样的问题。

切换回Proguard帮助了我。你可以在这里看到如何在你的项目中手动启用Proguard，而不是R8:
https://www.guardsquare.com/manual/setup/gradleplugin