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Commit aebd7e6b authored by Steven Moreland's avatar Steven Moreland Committed by Automerger Merge Worker
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Merge "example vendor app" am: e49b3684

parents 1730f442 e49b3684
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@@ -17,7 +17,7 @@ aidl_interface {
    stability: "vintf",
    backend: {
        java: {
            sdk_version: "module_current",
            sdk_version: "system_current",
        },
    },
    versions: [
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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__"],
}
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<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>
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/*
 * 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();
    }
}
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/*
 * 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;
}
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