Merge "example vendor app" am: e49b3684

    stability: "vintf",

    backend: {

        java: {

            sdk_version: "module_current",

            sdk_version: "system_current",

        },

    },

    versions: [

package {

    // See: http://go/android-license-faq

    // A large-scale-change added 'default_applicable_licenses' to import

    // all of the 'license_kinds' from "hardware_interfaces_license"

    // to get the below license kinds:

    //   SPDX-license-identifier-Apache-2.0

    default_applicable_licenses: ["hardware_interfaces_license"],

}

cc_library {

    name: "libexample_vib_getter",

    srcs: ["getter.cpp"],

    vendor: true,

    shared_libs: [

        "liblog",

        "libbinder_ndk",

    ],

    header_libs: ["jni_headers"],

    stl: "c++_shared",

    visibility: [":__subpackages__"],

}

android_app {

    name: "ExampleVibratorJavaVendorClient",

    privileged: true,

    vendor: true,

    static_libs: ["android.hardware.vibrator-V1-java"],

    jni_libs: ["libexample_vib_getter"],

    jarjar_rules: "jarjar.txt",

    stl: "c++_shared",

    srcs: ["example/vib/MyActivity.java"],

    sdk_version: "system_current",

    visibility: [":__subpackages__"],

}

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

          xmlns:tools="http://schemas.android.com/tools"

          package="example.vib">

    <application>

        <activity android:name=".MyActivity"/>

    </application>

</manifest>

/*

 * Copyright (C) 2022 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package example.vib;

import android.app.Activity;

import android.hardware.vibrator.IVibrator;

import android.os.Bundle;

import android.os.IBinder;

import android.os.RemoteException;

public class MyActivity extends Activity {

    private static native IBinder gimme(String name);

    @Override

    public void onCreate(Bundle b) {

        super.onCreate(b);

        System.loadLibrary("example_vib_getter");

        // There is no API to get ahold of a Stable AIDL service from a vendor app

        // in Java. This is because this is not the recommended way to get ahold

        // of functionality in Android. The Android API Council recommendation is to

        // implement uses-library APIs in the system/system_ext partition which add

        // new APIs. AIDL as an API in Java is not recommended or supported way to

        // communicate by apps - the recommendation is to use Java APIs. However,

        // there also exists a large number of vendor apps which are coupled with

        // hardware-specific code, and are therefore on the vendor partition. A

        // large number of these use HIDL, and this is how they can continue to

        // use that structure with AIDL.

        IVibrator v =

                IVibrator.Stub.asInterface(gimme("android.hardware.vibrator.IVibrator/default"));

        try {

            v.on(100 /*ms*/, null /*cb*/);

        } catch (RemoteException e) {

            throw new RuntimeException(e);

        }

        finish();

    }

}

/*

 * Copyright (C) 2022 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <android/binder_auto_utils.h>

#include <android/binder_ibinder_jni.h>

#include <android/binder_manager.h>

#include <jni.h>

#include <log/log.h>

extern "C" JNIEXPORT jobject JNICALL

Java_example_vib_MyActivity_gimme__Ljava_lang_String_2(JNIEnv* env, jclass /**/, jstring str) {

    ALOGI("%s", __func__);

    // Best practice is probably libnativehelper ScopedUtfChars or

    // libbase ScopeGuard (for platform code), but this is with minimal

    // dependencies.

    const char* name = env->GetStringUTFChars(str, nullptr);

    ALOGI("example vib gimme %s", name);

    jobject jbinder = nullptr;

    // Java does not have vendor variants. It's only safe to pass a service when

    // 'vendor: true' if it is @VintfStability.

    if (AServiceManager_isDeclared(name)) {

        ndk::SpAIBinder binder = ndk::SpAIBinder(AServiceManager_waitForService(name));

        jbinder = AIBinder_toJavaBinder(env, binder.get());

    } else {

        ALOGI("not declared");

    }

    env->ReleaseStringUTFChars(str, name);

    return jbinder;

}