<p>gomobile has this <a href="https://godoc.org/golang.org/x/mobile/cmd/gobind#hdr-Reverse_bindings">reverse bindings</a> thing for a while. Has anyone played with that?</p>
<p>I've managed to build the <a href="https://github.com/golang/mobile/tree/master/example/reverse">reverse</a> example with gradle successfully (just go into the <em>android</em> directory and run <code>./gradlew assembleDebug</code>), but how is that when I add some <code>java.lang</code> imports to the reverse.go:</p>
<pre><code>import (
"Java/android/databinding/DataBindingUtil"
"Java/android/os"
"Java/android/support/v7/app"
gopkg "Java/reverse"
rlayout "Java/reverse/R/layout"
"Java/reverse/databinding"
"Java/reverse/databinding/ActivityMainBinding"
"Java/java/lang/Object"
"Java/java/lang"
)
</code></pre>
<p>then use it somewhere:</p>
<pre><code>type MainActivity struct {
app.AppCompatActivity
binding databinding.ActivityMainBinding
f lang.Object
}
</code></pre>
<p>and run <code>./gradlew assembleDebug</code> then <code>gobind</code> will fail on that it cannot find <code>java.lang</code> packages?</p>
<pre><code>:gomobileDebug
/home/micro/Workspace/bin/gomobile: loadExportData failed go install -pkgdir=/home/micro/Workspace/pkg/gomobile/pkg_android_arm -gcflags=-shared -ldflags=-shared
golang.org/x/mobile/example/reverse/reverse failed: exit status 1
../reverse/reverse.go:12:2: cannot find package "Java/java/lang" in any of:
/usr/lib/go/src/Java/java/lang (from $GOROOT)
/tmp/gomobile-work-498996765/gen/src/Java/java/lang (from $GOPATH)
/home/micro/Workspace/src/Java/java/lang
../reverse/reverse.go:13:2: cannot find package "Java/java/lang/Object" in any of:
/usr/lib/go/src/Java/java/lang/Object (from $GOROOT)
/tmp/gomobile-work-498996765/gen/src/Java/java/lang/Object (from $GOPATH)
/home/micro/Workspace/src/Java/java/lang/Object
:gomobileDebug FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':gomobileDebug'.
> Process 'command '/home/micro/Workspace/bin/gomobile'' finished with non-zero exit value 1
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
</code></pre>
<p>I've asked already on <a href="https://github.com/golang/go/issues/17945#issuecomment-285597585">github</a> and <a href="http://stackoverflow.com/questions/42967805/gomobile-reverse-bindings-classpath">stackoverflow</a> but no one answered. So I hope you guys can help :)</p>
<hr/>**评论：**<br/><br/>caseynashvegas: <pre><p>I've had some errors doing reverse bindings on iOS but never for Android, the following example compiles fine for me. </p>
<pre><code>package reverseTest
import (
"Java/java/lang"
"Java/java/lang/Object"
"fmt"
)
func TestReverseBinding() {
o := NewObject()
fmt.Println(o)
}
func NewObject() lang.Object {
return Object.New()
}
</code></pre></pre>caseynashvegas: <pre><p>I'd also highly recommend using import aliases for anything you do with reverse bindings, it makes the world much cleaner and prevents the tooling from barking (like the go extension in VS Code)</p>
<pre><code>import (
lang "Java/java/lang"
Object "Java/java/lang/Object"
"fmt"
)
</code></pre></pre>microo8: <pre><p>This example compiles, but when I start adding android classes it cannot find it. I'm trying to make an <em>WebView</em> app, so I need to import <code>android.webkit.WebView</code>. I've also tried to change the <code>buildToolsVersion</code> and java version. But it fails the same way.</p></pre>adgjzcb: <pre><p>go's related repository is <strong><a href="http://github.oldjpg.com/repository/7313744" rel="nofollow">go</a></strong> </p>
<blockquote>
<p>golang</p>
</blockquote></pre>
