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 package example.vib; 18 19 import android.app.Activity; 20 import android.hardware.vibrator.IVibrator; 21 import android.os.Bundle; 22 import android.os.IBinder; 23 import android.os.RemoteException; 24 25 public class MyActivity extends Activity { gimme(String name)26 private static native IBinder gimme(String name); 27 28 @Override onCreate(Bundle b)29 public void onCreate(Bundle b) { 30 super.onCreate(b); 31 System.loadLibrary("example_vib_getter"); 32 33 // There is no API to get ahold of a Stable AIDL service from a vendor app 34 // in Java. This is because this is not the recommended way to get ahold 35 // of functionality in Android. The Android API Council recommendation is to 36 // implement uses-library APIs in the system/system_ext partition which add 37 // new APIs. AIDL as an API in Java is not recommended or supported way to 38 // communicate by apps - the recommendation is to use Java APIs. However, 39 // there also exists a large number of vendor apps which are coupled with 40 // hardware-specific code, and are therefore on the vendor partition. A 41 // large number of these use HIDL, and this is how they can continue to 42 // use that structure with AIDL. 43 IVibrator v = 44 IVibrator.Stub.asInterface(gimme("android.hardware.vibrator.IVibrator/default")); 45 46 try { 47 v.on(100 /*ms*/, null /*cb*/); 48 } catch (RemoteException e) { 49 throw new RuntimeException(e); 50 } 51 52 finish(); 53 } 54 } 55