app: [Android] replace PlatformHandle with JavaVM, AppContext methods

Clearer and fewer types.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

app/app_android.go

@@ -4,11 +4,15 @@ import (
 	"gioui.org/app/internal/window"
 )
 
-type Handle window.Handle
+// JavaVM returns the global JNI JavaVM.
+func JavaVM() uintptr {
+	return window.JavaVM()
+}
 
-// PlatformHandle returns the Android platform-specific Handle.
-func PlatformHandle() *Handle {
-	return (*Handle)(window.PlatformHandle)
+// AppContext returns the global Application context as a JNI
+// jobject.
+func AppContext() uintptr {
+	return window.AppContext()
 }
 
 // androidDriver is an interface that allows the Window's run method

app/internal/window/handle_android.go

@@ -1,11 +0,0 @@
-package window
-
-var PlatformHandle *Handle
-
-type Handle struct {
-	// JVM is the JNI *JVM pointer.
-	JVM uintptr
-	// Context is a global reference to the application's
-	// android.content.Context instance.
-	Context uintptr
-}

app/internal/window/os_android.go

@@ -61,6 +61,8 @@ var dataDirChan = make(chan string, 1)
 
 var theJVM *C.JavaVM
 
+var appContext C.jobject
+
 var views = make(map[C.jlong]*window)
 
 var mainWindow = newWindowRendezvous()
@@ -91,15 +93,19 @@ func runGoMain(env *C.JNIEnv, class C.jclass, jdataDir C.jbyteArray, context C.j
 	dataDir := C.GoStringN((*C.char)(unsafe.Pointer(dirBytes)), n)
 	dataDirChan <- dataDir
 	C.gio_jni_ReleaseByteArrayElements(env, jdataDir, dirBytes)
-	context = C.gio_jni_NewGlobalRef(env, context)
+	appContext = C.gio_jni_NewGlobalRef(env, context)
 
-	PlatformHandle = &Handle{
-		JVM:     uintptr(unsafe.Pointer(theJVM)),
-		Context: uintptr(context),
-	}
 	runMain()
 }
 
+func JavaVM() uintptr {
+	return uintptr(unsafe.Pointer(theJVM))
+}
+
+func AppContext() uintptr {
+	return uintptr(appContext)
+}
+
 func GetDataDir() string {
 	return <-dataDirChan
 }