MTK 快速开机 技术详解

http://blog.csdn.net/mirkerson/article/details/21861595

在我们mtk项目中：如何关闭快速开机功能？

①、在device/reallytek/项目配置rlk6737m_65_n/ProjectConfig.mk（rlk_projects\cxlite_h3713_a1\ProjectConfig.mk）

MTK_IPO_SUPPORT = no  //在ProjectConfig.mk配置的宏一定要在**.mk文件中进行转化才能被上层直接使用

②、在device/reallytek/rlk6737m_65_n/device.mk中

ifeq ($(strip $(MTK_IPO_SUPPORT)), yes)

  PRODUCT_PROPERTY_OVERRIDES += ro.mtk_ipo_support=1  
endif
//以ro.开头表示系统配置文件，并且表示只能读，即放在这里让我们看一下，让我们知道。PRODUCT_PROPERTY_OVERRIDES是android的一种默认格式

③、在上层某一个java文件中的FeatureOption类中调用MTK_IPO_SUPPORT成员变量判断它的值，从而进一步做如下操作

在./packages/apps/Settings/src/com/android/settings/accessibility/AccessibilitySettings.java:  中


FeatureOption.MTK_IPO_SUPPORT == false

首先查看Settings里控制开关

01// 获取当前状态

02boolean ipoSettingEnabled = Settings.System.getInt(getContentResolver(),

03            Settings.System.IPO_SETTING,1) == 1;

04if(mIpoSetting!=null){

05    mIpoSetting.setChecked(ipoSettingEnabled);

06}

07//设置新状态

08boolean isChecked = ((CheckBoxPreference) preference).isChecked();

09Settings.System.putInt(getContentResolver(), Settings.System.IPO_SETTING,

10                isChecked ? 1:0);

全局搜索 Settings.System.IPO_SETTING ，发现在关机系统里调用了该状态（ShutdownThread.Java）

ShutdownThread 里的 checkShutdownFlow 方法

01// 判断是否不支持该功能 是否需要重启

02if (FeatureOption.MTK_IPO_SUPPORT == false || mReboot == true) {

03    mShutdownFlow = NORMAL_SHUTDOWN_FLOW;    // 更改状态     

04    return;

05}

06boolean isIPOEnabled;

07try {

08    // 获取当前状态

09    isIPOEnabled = Settings.System.getInt(sInstance.mContext.getContentResolver(),

10        Settings.System.IPO_SETTING, 1) == 1;

11} catch (NullPointerException ex) {

12    mShutdownFlow = NORMAL_SHUTDOWN_FLOW;

13    return;

14}

15if (isIPOEnabled == true) {

16    // 判断系统参数

17    if ("1".equals(SystemProperties.get("sys.ipo.battlow")))

18        mShutdownFlow = NORMAL_SHUTDOWN_FLOW;

19    else

20        mShutdownFlow = IPO_SHUTDOWN_FLOW;

21} else {

22        mShutdownFlow = NORMAL_SHUTDOWN_FLOW;

23}

24return;

以上函数如果正常进入快速关机模式 
mShutdownFlow = IPO_SHUTDOWN_FLOW

关机流程会调用 ShutdownThread.shutdown(mContext, true);

ShutdownThread 里的 shutdown 方法

01bConfirmForAnimation = confirm;

02if (confirm) {

03    if (mDialog == null) {

04        mDialog = new AlertDialog.Builder(context)

05        .setIcon(android.R.drawable.ic_dialog_alert)

06        .setTitle(com.android.internal.R.string.power_off)

07        .setMessage(com.android.internal.R.string.shutdown_confirm)

08        .setPositiveButton(com.android.internal.R.string.yes, new DialogInterface.OnClickListener() {

09            public void onClick(DialogInterface dialog, int which) {

10                //确认关机 检查状态

11                beginShutdownSequence(context);

12                if (mDialog != null) {

13                    mDialog = null;

14                }

15            }

16        })

17        .setNegativeButton(com.android.internal.R.string.no, new DialogInterface.OnClickListener() {

18            public void onClick(DialogInterface dialog, int which) {

19                synchronized (sIsStartedGuard) {

20                    sIsStarted = false;

21                }

22                if (mDialog != null) {

23                    mDialog = null;

24                }

25            }

26        })

27        .create();

28        mDialog.setCancelable(false);

29        mDialog.getWindow().setType(

30             WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);

31        mDialog.getWindow().addFlags(

32             WindowManager.LayoutParams.FLAG_DIM_BEHIND);

33    }

34    if (!mDialog.isShowing()) {

35        mDialog.show();

36    }

37} else {

38    beginShutdownSequence(context);

39}

ShutdownThread 里的 beginShutdownSequence 方法

1if (mShutdownFlow == IPO_SHUTDOWN_FLOW) {

2     checkShutdownFlow();

3     synchronized (mShutdownThreadSync) {

4         mShutdownThreadSync.notify();

5     }

6 }

ShutdownThread 里的 run 方法

01public void run() {

02    checkShutdownFlow();

03    while (mShutdownFlow == IPO_SHUTDOWN_FLOW) {

04        stMgr.saveStates(mContext);

05        running();

06    }

07    if (mShutdownFlow != IPO_SHUTDOWN_FLOW) {

08        running();

09    }

10}

adb logcat -s “ShutdownThread”

01--------- beginning of /dev/log/system

02--------- beginning of /dev/log/main

03D/ShutdownThread(  189): !!! Request to shutdown !!!

04D/ShutdownThread(  189): Notifying thread to start radio shutdown

05D/ShutdownThread(  189): PowerOff dialog doesn't exist. Create it first

06D/ShutdownThread(  189): ShutdownThread exists already

07D/ShutdownThread(  189): checkShutdownFlow: IPO_Support=true mReboot=false

08D/ShutdownThread(  189): checkShutdownFlow: isIPOEnabled=true mShutdownFlow=1

09D/ShutdownThread(  189): shutdown acquire partial WakeLock 2

10I/ShutdownThread(  189): Sending shutdown broadcast...

11I/ShutdownThread(  189): Waiting for Bluetooth and Radio...

12I/ShutdownThread(  189): Radio and Bluetooth shutdown complete.

13I/ShutdownThread(  189): Shutting down MountService

14W/ShutdownThread(  189): Result code 0 from MountService.shutdown

15I/ShutdownThread(  189): Performing ipo low-level shutdown...

ShutdownManager 里的 saveStates 方法

1//保存wifi状态

ShutdownThread 里的 running 方法

1//广播全局事件 android.intent.action.ACTION_SHUTDOWN_IPO

2//关闭蓝牙

3//关闭Radio

4//关闭MountService

5stMgr.shutdown(mContext);

ShutdownManager 里的 shutdown 方法

1mPowerManager = (PowerManager)context.getSystemService("power");

2mPowerManager.goToSleep(SystemClock.uptimeMillis());

3......

4SystemProperties.set("ctl.start", "ipod");

5Intent intent = new Intent("android.intent.action.black.mode");

6intent.putExtra("_black_mode", true);

7context.sendBroadcast(intent);

adb logcat -s “ShutdownManager”

01--------- beginning of /dev/log/system

02--------- beginning of /dev/log/main

03I/ShutdownManager(  189): btState: false

04I/ShutdownManager(  189): saveStates: wifi:0, airplaneModeState: 0

05V/ShutdownManager(  189): Current Wallpaper = null

06V/ShutdownManager(  189): Current IME: com.android.inputmethod.pinyin

07I/ShutdownManager(  189): accessibility is disabled

08I/ShutdownManager(  189): killProcess (IME): com.android.inputmethod.pinyin

09I/ShutdownManager(  189): forceStopPackage: com.cooliris.media

10V/ShutdownManager(  189): process = com.android.settings

11I/ShutdownManager(  189): forceStopPackage: com.android.settings

12I/ShutdownManager(  189): forceStopPackage: com.mediatek.launcherplus

13I/ShutdownManager(  189): forceStopPackage: com.android.mms

14I/ShutdownManager(  189): forceStopPackage: android.process.media

15I/ShutdownManager(  189): forceStopPackage: android.process.media

16I/ShutdownManager(  189): forceStopPackage: android.process.media

17I/ShutdownManager(  189): forceStopPackage: com.mediatek.moreapp

18I/ShutdownManager(  189): forceStopPackage: com.mediatek.omacp

19I/ShutdownManager(  189): forceStopPackage: com.android.email

20V/ShutdownManager(  189): uid-process = com.mediatek.mdlogger

21I/ShutdownManager(  189): forceStopPackage: com.android.providers.calendar

22I/ShutdownManager(  189): forceStopPackage: com.android.deskclock

23V/ShutdownManager(  189): uid-process = com.android.ActivityNetwork

24I/ShutdownManager(  189): forceStopPackage: com.mediatek.weather

ActivityManagerPlus 接收到关机广播

adb logcat -s “ActivityManagerPlus”

1--------- beginning of /dev/log/system

2--------- beginning of /dev/log/main

3I/ActivityManagerPlus(  189): Receive:

4Intent { act=android.intent.action.ACTION_SHUTDOWN_IPO }

5I/ActivityManagerPlus(  189): finished

6I/ActivityManagerPlus(  189): Receive:

7Intent { act=android.intent.action.black.mode (has  extras) }

8I/ActivityManagerPlus(  189): createIPOWin

ActivityManagerPlus 里的 createIPOWin 方法 关机调用

01Window win = PolicyManager.makeNewWindow(context);

02win.setType(2016);

03win.setFlags(1024, 1024);

04win.setLayout(-1, -1);

05win.requestFeature(1);

06android.view.WindowManager.LayoutParams params = win.getAttributes();

07params.setTitle("IPOWindow");

08params.flags = 24;

09WindowManagerImpl wm = (WindowManagerImpl)context.getSystemService("window");

10view = win.getDecorView();

11wm.addView(view, params);

ActivityManagerPlus 里的 removeIPOWin 方法 开机调用

1WindowManagerImpl wm = (WindowManagerImpl)context.getSystemService("window");

2wm.removeView(view);

底层实现 
mediatek/source/external/ipod/