android.process.acore和system进程

从源码看来，android.process.acore进程应该是一些基本功能的载入程序。

android-4.3_r2.2中，它包括以下项目：

1.UserDictionaryProvider

<application android:process="android.process.acore"
        android:label="@string/app_label"
        android:allowClearUserData="false"
        android:backupAgent="DictionaryBackupAgent"
        android:killAfterRestore="false"
        >

2.ApplicationsProvider

<application android:process="android.process.acore" android:label="@string/app_label">

3.ContactsProvider

<application android:process="android.process.acore"
        android:label="@string/app_label"
        android:icon="@drawable/app_icon"
        android:allowBackup="false">

同样在android-4.3_r2.2中，system进程包括以下项目：

1.InputDevices

<application
            android:allowClearUserData="false"
            android:label="@string/app_label"
            android:process="system">

2.SettingsProvider

<application android:allowClearUserData="false"
                 android:label="@string/app_label"
                 android:process="system"
                 android:backupAgent="SettingsBackupAgent"
                 android:killAfterRestore="false"
                 android:icon="@drawable/ic_launcher_settings">

3.FusedLocation

<application
            android:label="@string/app_label"
            android:process="system">

4.core

<application android:process="system"
                 android:persistent="true"
                 android:hasCode="false"
                 android:label="@string/android_system_label"
                 android:allowClearUserData="false"
                 android:backupAgent="com.android.server.SystemBackupAgent"
                 android:killAfterRestore="false"
                 android:icon="@drawable/ic_launcher_android"
                 android:supportsRtl="true">
        <activity android:name="com.android.internal.app.ChooserActivity"
                android:theme="@style/Theme.Holo.Dialog.Alert"
                android:finishOnCloseSystemDialogs="true"
                android:excludeFromRecents="true"
                android:multiprocess="true">
            <intent-filter>
                <action android:name="android.intent.action.CHOOSER" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity android:name="com.android.internal.app.HeavyWeightSwitcherActivity"
                android:theme="@style/Theme.Holo.Dialog"
                android:label="@string/heavy_weight_switcher_title"
                android:finishOnCloseSystemDialogs="true"
                android:excludeFromRecents="true"
                android:process=":ui">
        </activity>
        <activity android:name="com.android.internal.app.PlatLogoActivity"
                android:theme="@style/Theme.Wallpaper.NoTitleBar.Fullscreen"
                android:process=":ui">
        </activity>
        <activity android:name="com.android.internal.app.DisableCarModeActivity"
                android:theme="@style/Theme.NoDisplay"
                android:excludeFromRecents="true"
                android:process=":ui">
        </activity>

        <activity android:name="android.accounts.ChooseAccountActivity"
                android:excludeFromRecents="true"
                android:exported="true"
                android:theme="@android:style/Theme.Holo.Dialog"
                android:label="@string/choose_account_label"
                android:process=":ui">
        </activity>

        <activity android:name="android.accounts.ChooseTypeAndAccountActivity"
                android:excludeFromRecents="true"
                android:exported="true"
                android:theme="@android:style/Theme.Holo.Dialog"
                android:label="@string/choose_account_label"
                android:process=":ui">
        </activity>

        <activity android:name="android.accounts.ChooseAccountTypeActivity"
                android:excludeFromRecents="true"
                android:theme="@android:style/Theme.Holo.Dialog"
                android:label="@string/choose_account_label"
                android:process=":ui">
        </activity>

        <activity android:name="android.accounts.CantAddAccountActivity"
                android:excludeFromRecents="true"
                android:exported="true"
                android:theme="@android:style/Theme.Holo.Dialog"
                android:label="@string/error_message_title"
                android:process=":ui">
        </activity>

        <activity android:name="android.accounts.GrantCredentialsPermissionActivity"
                android:excludeFromRecents="true"
                android:exported="true"
                android:theme="@android:style/Theme.Holo.DialogWhenLarge"
                android:process=":ui">
        </activity>

        <activity android:name="android.content.SyncActivityTooManyDeletes"
               android:theme="@android:style/Theme.Holo.Dialog"
               android:label="@string/sync_too_many_deletes"
               android:process=":ui">
        </activity>

        <activity android:name="com.android.server.ShutdownActivity"
            android:permission="android.permission.SHUTDOWN"
            android:excludeFromRecents="true">
            <intent-filter>
                <action android:name="android.intent.action.ACTION_REQUEST_SHUTDOWN" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.intent.action.REBOOT" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

        <activity android:name="com.android.internal.app.NetInitiatedActivity"
                android:theme="@style/Theme.Holo.Dialog.Alert"
                android:excludeFromRecents="true"
                android:process=":ui">
        </activity>

        <receiver android:name="com.android.server.BootReceiver"
                android:primaryUserOnly="true">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>

        <receiver android:name="com.android.server.updates.CertPinInstallReceiver" >
            <intent-filter>
                <action android:name="android.intent.action.UPDATE_PINS" />
            </intent-filter>
        </receiver>

        <receiver android:name="com.android.server.updates.IntentFirewallInstallReceiver" >
            <intent-filter>
                <action android:name="android.intent.action.UPDATE_INTENT_FIREWALL" />
            </intent-filter>
        </receiver>

        <receiver android:name="com.android.server.updates.SmsShortCodesInstallReceiver" >
            <intent-filter>
                <action android:name="android.intent.action.UPDATE_SMS_SHORT_CODES" />
            </intent-filter>
        </receiver>

        <receiver android:name="com.android.server.updates.CarrierProvisioningUrlsInstallReceiver" >
            <intent-filter>
                <action android:name="android.intent.action.UPDATE_CARRIER_PROVISIONING_URLS" />
            </intent-filter>
        </receiver>

        <receiver android:name="com.android.server.updates.TZInfoInstallReceiver" >
            <intent-filter>
                <action android:name="android.intent.action.UPDATE_TZINFO" />
            </intent-filter>
        </receiver>

        <receiver android:name="com.android.server.updates.SELinuxPolicyInstallReceiver" >
            <intent-filter>
                <action android:name="android.intent.action.UPDATE_SEPOLICY" />
            </intent-filter>
        </receiver>

        <receiver android:name="com.android.server.MasterClearReceiver"
            android:permission="android.permission.MASTER_CLEAR"
            android:priority="100" >
            <intent-filter>
                <!-- For Checkin, Settings, etc.: action=MASTER_CLEAR -->
                <action android:name="android.intent.action.MASTER_CLEAR" />

                <!-- MCS always uses REMOTE_INTENT: category=MASTER_CLEAR -->
                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
                <category android:name="android.intent.category.MASTER_CLEAR" />
            </intent-filter>
        </receiver>

        <service android:name="com.android.internal.os.storage.ExternalStorageFormatter"
            android:permission="android.permission.MASTER_CLEAR"
            android:exported="true" />

        <service android:name="android.hardware.location.GeofenceHardwareService"
            android:permission="android.permission.LOCATION_HARDWARE"
            android:exported="false" />
    </application>

可以看到，Google正在减少共用进程。