Android 10 精简系统_init.rc屏蔽

一、healthd裁剪
1. system/core/rootdir/init.rc
屏蔽healthd服务
#service healthd /system/bin/healthd
# class core
# critical
# group root system wakelock

二、app删除
2. 查看看是否有Contacts和Email应用: 有
3. 去掉build/make/target/product/core.mk中PRODUCT_PACKAGES下的Emailt和Contacts并编译看系统中是否还这两个应用: 还有
4. 删除out下对应设备目录下的system/app/Email和system/priv-app/Contacts目录，并编译看系统中是否还这两个应用: 还有
5. 把out目录里的system.img删除掉，再试: 不行
6. 把out/target/common/obj/Apps目录下Email和Contacts相关目录删除再试: 还是有
7. 重启一下系统试试: 不行
8. 把修改core.mk中，把mmsservice也删除掉试试:不行
9. 把源码中packages/apps中的Contacts和Email目录删除，Email目录保留emailcommon目录：好了，这次没了
此阶段结论：其实第3步后make clean一下也可以，但是不想make clean
10. 把Calendar、ExactCalculator(calculator2)、Music、Gallery、Gallery2、SoundRecorder、TvSettings全删掉

三、mediaserver裁剪
在frameworks/av/media/mediaserver/mediaserver.rc中，将mediaserver启动项屏蔽掉
编译后系统可以启动，但是没有壁纸了，设置壁纸也没作用

四、framework服务删减
1、VibratorService删除
屏蔽掉SystemServer.java中启动这个服务的代码

traceBeginAndSlog(“StartVibratorService”);
vibrator = new VibratorService(context);
ServiceManager.addService(“vibrator”, vibrator);
traceEnd();

删除后，应用调用Vibrator时不会崩溃，log会提示no vibrator service

下面这一段也屏蔽掉：

 
traceBeginAndSlog(“MakeVibratorServiceReady”);
try {
vibrator.systemReady();
} catch (Throwable e) {
reportWtf(“making Vibrator Service ready”, e);
}
traceEnd(); 

2. ConsumerIrService删除
在system/core/rootdir/init.rc中on boot节点中增加如下代码：

setprop config.disable_consumerir true

3. LockSettingsService
在SystemServer.java中屏蔽LOCK_SETTINGS_SERVICE_CLASS的启动

 
traceBeginAndSlog(“StartLockSettingsService”);
try {
mSystemServiceManager.startService(LOCK_SETTINGS_SERVICE_CLASS);
lockSettings = ILockSettings.Stub.asInterface(
ServiceManager.getService(“lock_settings”));
} catch (Throwable e) {
reportWtf(“starting LockSettingsService service”, e);
}
traceEnd(); 

屏蔽bootPhase对lockSetting的检查：

 
traceBeginAndSlog(“StartBootPhaseLockSettingsReady”);
mSystemServiceManager.startBootPhase(SystemService.PHASE_LOCK_SETTINGS_READY);
traceEnd();

4. MmsServiceBroker
删除SystemServer中

 
traceBeginAndSlog(“StartMmsService”);
mmsService = mSystemServiceManager.startService(MmsServiceBroker.class);
traceEnd();

第二个地方

 
traceBeginAndSlog(“MakeMmsServiceReady”);
try {
if (mmsServiceF != null) mmsServiceF.systemRunning();
} catch (Throwable e) {
reportWtf(“Notifying MmsService running”, e);
}
traceEnd();

5. TextServicesManagerService
禁止拼写检查服务

public boolean isSpellCheckerEnabled() {
//default from true to false, by liuderu
return getBoolean(Settings.Secure.SPELL_CHECKER_ENABLED, false);
}

6. AccountManagerService裁剪
SystemServer.java去掉相关代码

traceBeginAndSlog(“StartAccountManagerService”);
mSystemServiceManager.startService(ACCOUNT_SERVICE_CLASS);
traceEnd();

ContentService.java

private SyncManager getSyncManager() {
if (SystemProperties.getBoolean(“config.disable_network”, false)) {
return null;
}
 
 
 
synchronized(mSyncManagerLock) {
try {
// Try to create the SyncManager, return null if it fails (e.g. the disk is full).
if (mSyncManager == null) mSyncManager = new SyncManager(mContext, mFactoryTest);
} catch (SQLiteException e) {
Log.e(TAG, “Can’t create SyncManager”, e);
}
return mSyncManager;
}