136fa9bbbb
This is done by moving app.Context to internal/mobileinit, introducing mobileinit.SetCurrentContext and, making bind/java depend on it. TODO: check gomobile bind's proguard rule - context lookup was implemented through reflection on android.app.AppGlobals class. Change-Id: Ieb6ad503eeef8c2c1c5836a21c667938c5a701a2 Reviewed-on: https://go-review.googlesource.com/12279 Reviewed-by: David Crawshaw <crawshaw@golang.org>
62 lines
1.9 KiB
Go
62 lines
1.9 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package mobileinit
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/*
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#include <jni.h>
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#include <stdlib.h>
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// current_vm is stored to initialize other cgo packages.
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//
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// As all the Go packages in a program form a single shared library,
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// there can only be one JNI_OnLoad function for initialization. In
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// OpenJDK there is JNI_GetCreatedJavaVMs, but this is not available
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// on android.
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JavaVM* current_vm;
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// current_ctx is Android's android.context.Context. May be NULL.
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jobject current_ctx;
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// Set current_vm and current_ctx. The ctx passed in must be a global
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// reference instance.
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void set_vm_ctx(JavaVM* vm, jobject ctx) {
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current_vm = vm;
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current_ctx = ctx;
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// TODO: check leak
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}
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*/
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import "C"
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import "unsafe"
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// SetCurrentContext populates the global Context object with the specified
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// current JavaVM instance (vm) and android.context.Context object (ctx).
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// The android.context.Context object must be a global reference.
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func SetCurrentContext(vm, ctx unsafe.Pointer) {
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C.set_vm_ctx((*C.JavaVM)(vm), (C.jobject)(ctx))
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}
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// TODO(hyangah): should the app package have Context? It may be useful for
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// external packages that need to access android context and vm.
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// Context holds global OS-specific context.
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//
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// Its extra methods are deliberately difficult to access because they must be
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// used with care. Their use implies the use of cgo, which probably requires
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// you understand the initialization process in the app package. Also care must
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// be taken to write both Android, iOS, and desktop-testing versions to
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// maintain portability.
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type Context struct{}
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// AndroidContext returns a jobject for the app android.context.Context.
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func (Context) AndroidContext() unsafe.Pointer {
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return unsafe.Pointer(C.current_ctx)
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}
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// JavaVM returns a JNI *JavaVM.
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func (Context) JavaVM() unsafe.Pointer {
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return unsafe.Pointer(C.current_vm)
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}
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