系统服务实际上是调用了远程Bind对象进行操作 1：添加aidl文件到 framworks/base/core/java/android/hardware/ISerialManager.aidl//

系统服务实际上是调用了远程Bind对象进行操作

1：添加aidl文件到 framworks/base/core/java/android/hardware/ISerialManager.aidl//这个文件是需要自己现实的

2：编译脚本中添加申明

frameworks/base/Android.mk: core/java/android/hardware/ISerialManager.aidl \

3：Context文件中添加变量

frameworks/base/core/java/android/content/Context.java: public static final String SERIAL_SERVICE = “serial”;

4:添加调用远程服务的文件

frameworks/base/services/java/com/android/server/ SerialService.java//这个文件是需要自己现实的

到frameworks/base/services/java/com/android/server/SystemServer.java:

例如：public class SerialService extends ISerialManager.Stub文件

try {

Slog.i(TAG, “Serial Service”);

// Serial port support

serial = new SerialService(context);

ServiceManager.addService(Context.SERIAL_SERVICE, serial);

} catch (Throwable e) {

Slog.e(TAG, “Failure starting SerialService”, e);

}

}

5:添加注册服务到 frameworks/base/core/java/android/app/ContextImpl.java: 获取SerialManager

import android.hardware.SerialManager;

import android.hardware.ISerialManager;//这两个文件是需要自己现实的

构造方法中传入两个参数 public SerialManager(Context context, ISerialManager service) {

mContext = context;

mService = service;

}

registerService(SERIAL_SERVICE, new ServiceFetcher() {

public Object createService(ContextImpl ctx) {

IBinder b = ServiceManager.getService(SERIAL_SERVICE);

return new SerialManager(ctx, ISerialManager.Stub.asInterface(b));

}});

接下来就可以通过(SerialManager)getSystemService(Context.SERIAL_SERVICE);来获取SerialManager

原文链接：
https://blog.youkuaiyun.com/weixin_36359110/article/details/117466897