Javah compiled class file could not find android.app.Activity classes file

The Android.app.Activity class file error was not found when using Javah to generate JNI header files at the root directory of the Android project.

Unable to access android.app.Activity is a description without introducing Android.jar package

There are two ways to solve this:

The first type: Execute the command in the SRC directory,javah-d. /jni Com.example.hellojni.HelloJni

Where-D indicates the output directory

Second: Using the Bootclasspath parameter, let him specify a Android.jar package

such as: Javah-classpath Bin/classes-bootclasspath D:\android-sdk-windows\platforms\android-16\android.jar-d JNI Com.example.hellojni.HelloJni

Additional parameters can be viewed through the javah-h command.

Javah compiled class file could not find android.app.Activity classes file