Android P中如何自定义一个系统Service_自定义service

1. Context中新建service name

frameworks/base/core/java/android/content/Context.java

public static final String JUSTART_SERVICE = "justart";

2. 创建aidl文件

frameworks/base/core/java/android/app/IJustArt.aidl

package android.app;
 
/**
 * Created by justart on 2019/3/21.
 */
interface IJustArt {
    String getAllWifiInfo();
}

这里的IJustArt.aidl负责APP端和system_server中的自定义service 通信

3. Android.bp 配置

frameworks/base/Android.bp

         "core/java/android/app/IActivityManager.aidl",
+        "core/java/android/app/IJustArt.aidl",

找一个熟悉的系统service对应的aidl文件，在下面添加一条即可。只有在这里配置之后编译系统才能找到他，将它编译生成IJustArt.java,编译之后的文件生成在 ：\out\soong\.intermediates\frameworks\base\framework\android_common\gen\aidl\frameworks\base\core\java\android\app\IJustArt.java

4. service下创建自定义Service

frameworks/base/services/core/java/com/android/server/justart/JustArtService.java

package com.android.server.justart;
 
import android.os.RemoteException;
 
import android.app.IJustArt;
 
/**
 * Created by justart on 2019/3/21.
 */
 
public class JustArtService extends IJustArt.Stub{
    private final static String TAG = "JustArtService";
    public JustArt