41 lines
889 B
Go
41 lines
889 B
Go
//go:generate javac -bootclasspath $ANDROID_HOME/platforms/android-29/android.jar AClass.java
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//go:generate jar cf AClass.jar AClass.class
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//go:generate rm AClass.class
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package main
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import (
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"fmt"
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"log"
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"time"
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"gioui.org/app"
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)
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func callJni() {
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time.Sleep(time.Second/5)
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jvm := app.JavaVM()
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ctx := app.AppContext()
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labchan <- fmt.Sprintf("JVM = %d", jvm)
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labchan <- fmt.Sprintf("Context = %d", ctx)
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SetJVM(jvm, ctx)
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RunInJVM(func(env *JNIEnv) {
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log.Print("finding class")
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cls := FindClass(env, "st/wow/git/jni/AClass")
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log.Print("getting methodID")
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mth := JniGetMethodID(env, cls, "Num", "()I")
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if mth == nil {
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labchan <- "nil method"
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return
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}
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log.Print("creating object")
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inst := CreateObject(env, cls)
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log.Print("calling method")
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val := JniCallIntMethod(env, inst, mth)
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log.Print("got result")
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labchan <- fmt.Sprintf("val = %d", val)
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})
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}
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