1 /*
2 * Copyright (C) 2022 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <android/binder_auto_utils.h>
18 #include <android/binder_ibinder_jni.h>
19 #include <android/binder_manager.h>
20 #include <jni.h>
21 #include <log/log.h>
22
23 extern "C" JNIEXPORT jobject JNICALL
Java_example_vib_MyActivity_gimme__Ljava_lang_String_2(JNIEnv * env,jclass,jstring str)24 Java_example_vib_MyActivity_gimme__Ljava_lang_String_2(JNIEnv* env, jclass /**/, jstring str) {
25 ALOGI("%s", __func__);
26
27 // Best practice is probably libnativehelper ScopedUtfChars or
28 // libbase ScopeGuard (for platform code), but this is with minimal
29 // dependencies.
30 const char* name = env->GetStringUTFChars(str, nullptr);
31
32 ALOGI("example vib gimme %s", name);
33
34 jobject jbinder = nullptr;
35
36 // Java does not have vendor variants. It's only safe to pass a service when
37 // 'vendor: true' if it is @VintfStability.
38 if (AServiceManager_isDeclared(name)) {
39 ndk::SpAIBinder binder = ndk::SpAIBinder(AServiceManager_waitForService(name));
40 jbinder = AIBinder_toJavaBinder(env, binder.get());
41 } else {
42 ALOGI("not declared");
43 }
44
45 env->ReleaseStringUTFChars(str, name);
46
47 return jbinder;
48 }
49