package com.example.firstapp.utils.tinker
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import android.annotation.SuppressLint
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import android.content.Context
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import java.lang.reflect.Constructor
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import java.lang.reflect.Field
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import java.lang.reflect.Method
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@Suppress("NULLABILITY_MISMATCH_BASED_ON_JAVA_ANNOTATIONS", "UNCHECKED_CAST", "unused")
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object ShareReflectUtil {
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/**
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* Locates a given field anywhere in the class inheritance hierarchy.
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*
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* @param instance an object to search the field into.
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* @param name field name
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* @return a field object
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* @throws NoSuchFieldException if the field cannot be located
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*/
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@Throws(NoSuchFieldException::class)
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fun findField(instance: Any, name: String): Field {
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var clazz: Class<*>? = instance.javaClass
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while (clazz != null) {
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try {
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val field = clazz.getDeclaredField(name)
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if (!field.isAccessible) {
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field.isAccessible = true
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}
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return field
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} catch (e: NoSuchFieldException) {
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// ignore and search next
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}
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clazz = clazz.superclass
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}
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throw NoSuchFieldException("Field " + name + " not found in " + instance.javaClass)
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}
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@Throws(NoSuchFieldException::class)
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fun findField(originClazz: Class<*>, name: String): Field {
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var clazz: Class<*>? = originClazz
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while (clazz != null) {
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try {
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val field = clazz.getDeclaredField(name)
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if (!field.isAccessible) {
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field.isAccessible = true
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}
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return field
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} catch (e: NoSuchFieldException) {
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// ignore and search next
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}
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clazz = clazz.superclass
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}
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throw NoSuchFieldException("Field $name not found in $originClazz")
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}
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/**
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* Locates a given method anywhere in the class inheritance hierarchy.
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*
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* @param instance an object to search the method into.
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* @param name method name
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* @param parameterTypes method parameter types
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* @return a method object
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* @throws NoSuchMethodException if the method cannot be located
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*/
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@Throws(NoSuchMethodException::class)
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fun findMethod(instance: Any, name: String, vararg parameterTypes: Class<*>?): Method {
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var clazz: Class<*>? = instance.javaClass
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while (clazz != null) {
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try {
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val method = clazz.getDeclaredMethod(name, *parameterTypes)
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if (!method.isAccessible) {
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method.isAccessible = true
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}
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return method
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} catch (e: NoSuchMethodException) {
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// ignore and search next
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}
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clazz = clazz.superclass
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}
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throw NoSuchMethodException(
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"Method "
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+ name
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+ " with parameters "
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+ listOf(*parameterTypes)
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+ " not found in " + instance.javaClass
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)
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}
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/**
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* Locates a given method anywhere in the class inheritance hierarchy.
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*
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* @param clazz a class to search the method into.
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* @param name method name
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* @param parameterTypes method parameter types
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* @return a method object
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* @throws NoSuchMethodException if the method cannot be located
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*/
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@Throws(NoSuchMethodException::class)
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fun findMethod(clazz: Class<*>?, name: String, vararg parameterTypes: Class<*>?): Method {
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var tClazz = clazz
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while (tClazz != null) {
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try {
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val method = tClazz.getDeclaredMethod(name, *parameterTypes)
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if (!method.isAccessible) {
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method.isAccessible = true
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}
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return method
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} catch (e: NoSuchMethodException) {
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// ignore and search next
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}
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tClazz = tClazz.superclass
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}
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throw NoSuchMethodException(
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"Method "
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+ name
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+ " with parameters "
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+ listOf(*parameterTypes)
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+ " not found in tClazz"
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)
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}
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/**
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* Locates a given constructor anywhere in the class inheritance hierarchy.
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*
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* @param instance an object to search the constructor into.
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* @param parameterTypes constructor parameter types
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* @return a constructor object
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* @throws NoSuchMethodException if the constructor cannot be located
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*/
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@Throws(NoSuchMethodException::class)
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fun findConstructor(instance: Any, vararg parameterTypes: Class<*>?): Constructor<*> {
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var clazz: Class<*>? = instance.javaClass
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while (clazz != null) {
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try {
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val constructor = clazz.getDeclaredConstructor(*parameterTypes)
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if (!constructor.isAccessible) {
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constructor.isAccessible = true
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}
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return constructor
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} catch (e: NoSuchMethodException) {
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// ignore and search next
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}
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clazz = clazz.superclass
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}
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throw NoSuchMethodException(
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"Constructor"
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+ " with parameters "
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+ listOf(*parameterTypes)
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+ " not found in " + instance.javaClass
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)
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}
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/**
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* Replace the value of a field containing a non null array, by a new array containing the
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* elements of the original array plus the elements of extraElements.
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*
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* @param instance the instance whose field is to be modified.
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* @param fieldName the field to modify.
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* @param extraElements elements to append at the end of the array.
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*/
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@Throws(NoSuchFieldException::class, IllegalArgumentException::class, IllegalAccessException::class)
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fun expandFieldArray(instance: Any, fieldName: String, extraElements: Array<Any?>) {
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val jlrField = findField(instance, fieldName)
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val original = jlrField[instance] as Array<Any>
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val combined = java.lang.reflect.Array.newInstance(original.javaClass.componentType, original.size + extraElements.size) as Array<Any>
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// NOTE: changed to copy extraElements first, for patch load first
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System.arraycopy(extraElements, 0, combined, 0, extraElements.size)
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System.arraycopy(original, 0, combined, extraElements.size, original.size)
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jlrField[instance] = combined
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}
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/**
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* Replace the value of a field containing a non null array, by a new array containing the
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* elements of the original array plus the elements of extraElements.
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*
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* @param instance the instance whose field is to be modified.
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* @param fieldName the field to modify.
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*/
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@Throws(NoSuchFieldException::class, IllegalArgumentException::class, IllegalAccessException::class)
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fun reduceFieldArray(instance: Any, fieldName: String, reduceSize: Int) {
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if (reduceSize <= 0) {
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return
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}
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val jlrField = findField(instance, fieldName)
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val original = jlrField[instance] as Array<Any>
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val finalLength = original.size - reduceSize
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if (finalLength <= 0) {
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return
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}
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val combined = java.lang.reflect.Array.newInstance(original.javaClass.componentType, finalLength) as Array<Any>
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System.arraycopy(original, reduceSize, combined, 0, finalLength)
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jlrField[instance] = combined
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}
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@SuppressLint("PrivateApi")
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fun getActivityThread(
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context: Context?,
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activityThread: Class<*>?,
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): Any? {
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var tActivityThread = activityThread
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return try {
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if (tActivityThread == null) {
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tActivityThread = Class.forName("android.app.ActivityThread")
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}
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val m = tActivityThread!!.getMethod("currentActivityThread")
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m.isAccessible = true
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var currentActivityThread = m.invoke(null)
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if (currentActivityThread == null && context != null) {
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// In older versions of Android (prior to frameworks/base 66a017b63461a22842)
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// the currentActivityThread was built on thread locals, so we'll need to try
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// even harder
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val mLoadedApk = context.javaClass.getField("mLoadedApk")
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mLoadedApk.isAccessible = true
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val apk = mLoadedApk[context]
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val mActivityThreadField = apk.javaClass.getDeclaredField("mActivityThread")
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mActivityThreadField.isAccessible = true
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currentActivityThread = mActivityThreadField[apk]
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}
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currentActivityThread
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} catch (ignore: Throwable) {
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null
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}
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}
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/**
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* Handy method for fetching hidden integer constant value in system classes.
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*
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* @param clazz
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* @param fieldName
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* @return
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*/
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fun getValueOfStaticIntField(clazz: Class<*>, fieldName: String, defVal: Int): Int {
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return try {
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val field = findField(clazz, fieldName)
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field.getInt(null)
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} catch (thr: Throwable) {
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defVal
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}
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}
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}
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