新增系統服務需要新增aidl,service,manager檔案,需要修改SystemServer,Context,ContextImpl 下面舉例進行說明,主要新增一個服務,用於獲取系統時間和版本號

1.在frameworks/base/core/java/android/app/下新增aidl檔案

frameworks/base/core/java/android/app/ISystemStatusManager.aidl package android.app;   interface ISystemStatusManager {     String[] getSystemStatus(); }

2.修改frameworks/base/Android.mk檔案,將aidl加到該檔案中,這樣才可以被編譯到,否則編譯不過

將core/java/android/app/ISystemStatusManager.aidl \加到LOCAL_SRC_FILES後面

3.在frameworks/base/services/core/java/com/android/server/下新增service檔案

frameworks/base/services/core/java/com/android/server/SystemStatusManagerService.java package com.android.server;   import android.app.ISystemStatusManager; import android.content.Context; import android.os.Build; import android.util.Slog;   import java.text.SimpleDateFormat; import java.util.Date;   public class SystemStatusManagerService extends ISystemStatusManager.Stub {     private Context mContext;       public SystemStatusManagerService(Context context) {         mContext = context;           Slog.d("SystemStatus", "Date:" + getDateTime() + "\nVersion:" + getVersion());     }       @Override     public String[] getSystemStatus() {         String[] infos = new String[2];           infos[0] = "Date:" + getDateTime();         infos[1] = "Version:" + getVersion();           return infos;     }       private String getDateTime() {         SimpleDateFormat format = new SimpleDateFormat("yyyy-DD-mm HH:mm:s");         Date date = new Date(System.currentTimeMillis());           return format.format(date);     }       private String getVersion() {         return Build.DISPLAY;     } }

4.在frameworks/base/core/java/android/app/下新增manager

frameworks/base/core/java/android/app/SystemStatusManager.java package android.app;   import android.content.Context; import android.os.RemoteException; import android.util.Slog;   public class SystemStatusManager {     Context mContext;     ISystemStatusManager mService;       public SystemStatusManager(Context context, ISystemStatusManager service) {         mContext = context;         mService = service;     }       public String[] getSystemStatus() {         if (mService != null) {             try {                 return mService.getSystemStatus();             } catch (RemoteException e) {                 Slog.e("SystemStatus", "RemoteException " + e);                 return null;             }         }           return null;     } } 5.在frameworks/base/core/java/android/content/Context.java中新增service名稱定義

public static final String SYSTEM_STATUS_SERVICE = "system_status_service";

6.在frameworks/base/services/java/com/android/server/SystemServer.java中新增服務

在startOtherServices()方法中新增如下程式碼 try {     ServiceManager.addService(Context.SYSTEM_STATUS_SERVICE, new SystemStatusManagerService(context)); } catch (Throwable e) {     Slog.e(TAG, "Failure starting System Status Service ", e); }

7.在frameworks/base/core/java/android/app/ContextImpl.java中註冊服務

在static {}中新增如下程式碼 registerService(SYSTEM_STATUS_SERVICE, new ServiceFetcher() {     public Object createService(ContextImpl ctx) {         IBinder b = ServiceManager.getService(SYSTEM_STATUS_SERVICE);         return new SystemStatusManager(ctx, ISystemStatusManager.Stub.asInterface(b));     } });

8.編譯framework.jar和services.jar,push到手機,重啟手機

重啟手機後就會輸出如下log: D/SystemStatus(  910): Date:2017-01-00 00:00:13 D/SystemStatus(  910): Version:xxx

9.如果系統app需要使用該service,可以通過如下方式呼叫

SystemStatusManager mManager = (SystemStatusManager) getSystemService(Context.SYSTEM_STATUS_SERVICE); try {     String[] infos = mManager.getSystemStatus();     Log.i("SystemStatus", "SystemStatus Date:" + infos[0] + "\nVersion:" + infos[1]); } catch (Exception e) {     e.printStackTrace();

}

---------------------  作者：默默9518  來源：CSDN  原文：https://blog.csdn.net/sgzy001/article/details/54344739?utm_source=copy