MTK 快速开机技术详解

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mb61b9894206fca 2021-12-21 16:10:03 ©著作权

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Android version 2.3.5

首先查看Settings里控制开关

`01`	`// 获取当前状态`

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

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

`04`	`if``(mIpoSetting!=``null``){`

`05`	`mIpoSetting.setChecked(ipoSettingEnabled);`

`06`	`}`

`07`	`//设置新状态`

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

`09`	`Settings.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`

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

`03`	`mShutdownFlow = NORMAL_SHUTDOWN_FLOW;` `// 更改状态`

`04`	`return``;`

`05`	`}`

`06`	`boolean``isIPOEnabled;`

`07`	`try``{`

`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`	`}`

`15`	`if``(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`	`}`

`24`	`return``;`

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

`01`	`bConfirmForAnimation = confirm;`

`02`	`if``(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

`1`	`if``(mShutdownFlow == IPO_SHUTDOWN_FLOW) {`

`2`	`checkShutdownFlow();`

`3`	`synchronized``(mShutdownThreadSync) {`

`4`	`mShutdownThreadSync.notify();`

`5`	`}`

`6`	`}`

ShutdownThread 里的 run 方法

`01`	`public``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`

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

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

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

`06`	`D/ShutdownThread(` `189``): ShutdownThread exists already`

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

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

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

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

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

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

`13`	`I/ShutdownThread(` `189``): Shutting down MountService`

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

`15`	`I/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`

`5`	`stMgr.shutdown(mContext);`

ShutdownManager 里的 shutdown 方法

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

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

`3`	`......`

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

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

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

`7`	`context.sendBroadcast(intent);`

adb logcat -s “ShutdownManager”

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

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

`03`	`I/ShutdownManager(` `189``): btState:` `false`

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

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

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

`07`	`I/ShutdownManager(` `189``): accessibility is disabled`

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

`24`	`I/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`

`3`	`I/ActivityManagerPlus(` `189``): Receive:`

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

`5`	`I/ActivityManagerPlus(` `189``): finished`

`6`	`I/ActivityManagerPlus(` `189``): Receive:`

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

`8`	`I/ActivityManagerPlus(` `189``): createIPOWin`

ActivityManagerPlus 里的 createIPOWin 方法关机调用

`01`	`Window win = PolicyManager.makeNewWindow(context);`

`02`	`win.setType(``2016``);`

`03`	`win.setFlags(``1024``,` `1024``);`

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

`05`	`win.requestFeature(``1``);`

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

`07`	`params.setTitle(``"IPOWindow"``);`

`08`	`params.flags =` `24``;`

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

`10`	`view = win.getDecorView();`

`11`	`wm.addView(view, params);`

ActivityManagerPlus 里的 removeIPOWin 方法开机调用

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

`2`	`wm.removeView(view);`

底层实现

mediatek/source/external/ipod/

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