Android4.4添加重启功能

需要改动的文件：
frameworks\base\core\res\res\values\strings.xml

frameworks\base\core\res\res\values-zh-rCN\strings.xml

frameworks\base\core\res\res\values\symbols.xml
frameworks\base\policy\src\com\android\internal\policy\impl\GlobalActions.java
frameworks\base\core\java\android\view\WindowManagerPolicy.java

frameworks\base\services\java\com\android\server\wm\windowManagerService.java

frameworks\base\services\java\com\android\server\power\ShutdownThread.java

首先在长按电源键的列表中添加重启按钮，在frameworks\base\policy\src\com\android\internal\policy\impl\GlobalActions.java文件中添加如下

        // first: power off        mItems.add(            new SinglePressAction(                    com.android.internal.R.drawable.ic_lock_power_off,                    R.string.global_action_power_off) {                public void onPress() {                    // shutdown by making sure radio and power are handled accordingly.                    Log.i(TAG, "[SHTDWN] onPress, request a clean shutdown");                    mWindowManagerFuncs.shutdown(true);                }                public boolean onLongPress() {                    Log.i(TAG, "[SHTDWN] onLongPress, request a reboot safe mode");                    mWindowManagerFuncs.rebootSafeMode(true);                    return true;                }                public boolean showDuringKeyguard() {                    return true;                }                public boolean showBeforeProvisioning() {                    return true;                }            });// add rebootmItems.add(new SinglePressAction(com.android.internal.R.drawable.ic_lock_power_off,R.string.global_action_reboot) {public void onPress() {Log.v(TAG, "[REBOOT] onPress, request a reboot without safe mode");mWindowManagerFuncs.reboot(true);}public boolean showDuringKeyguard() {return true;}public boolean showBeforeProvisioning() {return true;}});<pre name="code" class="java">// add reboot end

// one more thing: optionally add a list of users to switch to if (SystemProperties.getBoolean("fw.power_user_switcher", false)) { addUsersToMenu(mItems); } mAdapter = new MyAdapter(); AlertParams params = new AlertParams(mContext); params.mAdapter = mAdapter; params.mOnClickListener = this; params.mForceInverseBackground = true; GlobalActionsDialog dialog = new GlobalActionsDialog(mContext, params); dialog.setCanceledOnTouchOutside(false); // Handled by the custom class. dialog.getListView().setItemsCanFocus(true); dialog.getListView().setLongClickable(true); dialog.getListView().setOnItemLongClickListener( new AdapterView.OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { return mAdapter.getItem(position).onLongPress(); } }); dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG); dialog.setOnDismissListener(this); return dialog; }

在GlobalActionsDialog方法可以看 mItems.add这个方法是添加菜单选项的，该菜单的添加的第一个选项就是关机选项。可以仿照关机的Item添加一个重启的选项，如上面的代码所示；这样就解决了在长按的电源键弹出的对话框中添加一个重启选项了。当然这仅仅是添加一个显示而已，接下来就为这个选项添加逻辑控制代码了。首先在找到WindowManagerFuncs这个所在的位置，在frameworks\base\core\java\android\view\WindowManagerPolicy.java中

        /**         * Switch the keyboard layout for the given device.         * Direction should be +1 or -1 to go to the next or previous keyboard layout.         */        public void switchKeyboardLayout(int deviceId, int direction);        public void shutdown(boolean confirm);        public void rebootSafeMode(boolean confirm);        // add reboot        public void reboot(boolean confirm);        /**         * Return the window manager lock needed to correctly call "Lw" methods.         */        public Object getWindowManagerLock();        /** Register a system listener for touch events */        void registerPointerEventListener(PointerEventListener listener);        /** Unregister a system listener for touch events */        void unregisterPointerEventListener(PointerEventListener listener);

添加reboot方法。但这只是添加接口而已，它的具体实现在frameworks\base\services\java\com\android\server\wm\windowManagerService.java中

    // Called by window manager policy.  Not exposed externally.    @Override    public void shutdown(boolean confirm) {        ShutdownThread.shutdown(mContext, confirm);    }<pre name="code" class="java">    //add reboot    @Override    public void reboot(boolean confirm){  Log.v(TAG, "reboot");        ShutdownThread.reboot(mContext,null,confirm);       }    // Called by window manager policy.  Not exposed externally.    @Override    public void rebootSafeMode(boolean confirm) {        ShutdownThread.rebootSafeMode(mContext, confirm);    }

同样在仿照关机的原理添加reboot的具体实现代码，既然在ShutdownThread这个类中提供了shutdown和rebootSafeMode的方法，那按理也应该有reboot的方法，或者类似reboot的方法。在frameworks\base\services\java\com\android\server\power\ShutdownThread.java中

    /**     * Request a clean shutdown, waiting for subsystems to clean up their     * state etc.  Must be called from a Looper thread in which its UI     * is shown.     *     * @param context Context used to display the shutdown progress dialog.     * @param reason code to pass to the kernel (e.g. "recovery"), or null.     * @param confirm true if user confirmation is needed before shutting down.     */    public static void reboot(final Context context, String reason, boolean confirm) {        mReboot = true;        mRebootSafeMode = false;        mRebootReason = reason;        Log.i(TAG, "[SHTDWN] reboot, reboot requested"            + " reason=" + (reason != null ? reason : "null")            + " confirm=" + (confirm ? "yes" : "no"));        shutdownInner(context, confirm);    }    /**     * Request a reboot into safe mode.  Must be called from a Looper thread in which its UI     * is shown.     *     * @param context Context used to display the shutdown progress dialog.     * @param confirm true if user confirmation is needed before shutting down.     */    public static void rebootSafeMode(final Context context, boolean confirm) {        mReboot = true;        mRebootSafeMode = true;        mRebootReason = null;        Log.i(TAG, "[SHTDWN] reboot, rebootSafeMode requested"            + " reason=null"            + " confirm=" + (confirm ? "yes" : "no"));        shutdownInner(context, confirm);    }

其中提供了一个静态的reboot方法，所以在windowManagerService.java中的reboot实现中直接调用ShutdownThread中reboot即可。

 public static void reboot(final Context context, String reason, boolean confirm)；有三个参数，后两个参数解释如下： reason  如果值为是null，正常重启；如果是recovery，系统重启进入recovery mode ；confirm为true显示关机提示框，需要用户【确认】；false不显示提示框，直接关机。

到此重启功能基本上可以使用了（除资源还没有添加之外），但是此时选择重启选项时，其提示还是不够关机的提示，所以还要修改选择“重启”时的对话框的提示。

在frameworks\base\services\java\com\android\server\power\ShutdownThread.java中

        final int longPressBehavior = context.getResources().getInteger(                        com.android.internal.R.integer.config_longPressOnPowerBehavior);        // reboot confirmation dialog        final int resourceId = mReboot ? com.android.internal.R.string.reboot_confirm                        : (mRebootSafeMode ? com.android.internal.R.string.reboot_safemode_confirm                        : (longPressBehavior == 2 ? com.android.internal.R.string.shutdown_confirm_question                        : com.android.internal.R.string.shutdown_confirm));        Log.d(TAG, "Notifying thread to start shutdown longPressBehavior=" + longPressBehavior);        // dumpStack to log the caller name        Log.e(TAG, "[SHTDWN] My call stack is:");        Thread.dumpStack();

修改为：

        final int longPressBehavior = context.getResources().getInteger(                        com.android.internal.R.integer.config_longPressOnPowerBehavior);        // change for rebootfinal int resourceId = mReboot ? com.android.internal.R.string.reboot_confirm: (mRebootSafeMode ? com.android.internal.R.string.reboot_safemode_confirm: (longPressBehavior == 2 ? com.android.internal.R.string.shutdown_confirm_question: com.android.internal.R.string.shutdown_confirm));// end        Log.d(TAG, "Notifying thread to start shutdown longPressBehavior=" + longPressBehavior);        // dumpStack to log the caller name        Log.e(TAG, "[SHTDWN] My call stack is:");        Thread.dumpStack();

以及添加正在关机的判断将下面的代码

        if (confirm) {            final CloseDialogReceiver closer = new CloseDialogReceiver(context);            if (sConfirmDialog != null) {                sConfirmDialog.dismiss();            }        // reboot confirmation dialog        sConfirmDialog = new AlertDialog.Builder(context)                        .setTitle(                        mReboot ? com.android.internal.R.string.global_action_reboot                        : (mRebootSafeMode ? com.android.internal.R.string.reboot_safemode_title                        : com.android.internal.R.string.power_off))                        .setMessage(resourceId)                    .setPositiveButton(com.android.internal.R.string.yes, new DialogInterface.OnClickListener() {                        public void onClick(DialogInterface dialog, int which) {                            beginShutdownSequence(context);                            Log.i(TAG, "[SHTDWN] shutdown, confirm=YES");                        }                    })

修改为：

 if (confirm) {            final CloseDialogReceiver closer = new CloseDialogReceiver(context);            if (sConfirmDialog != null) {                sConfirmDialog.dismiss();            }            // change for rebootsConfirmDialog = new AlertDialog.Builder(context).setTitle(mReboot ? com.android.internal.R.string.global_action_reboot: (mRebootSafeMode ? com.android.internal.R.string.reboot_safemode_title: com.android.internal.R.string.power_off)).setMessage(resourceId)    // end                    .setPositiveButton(com.android.internal.R.string.yes, new DialogInterface.OnClickListener() {                        public void onClick(DialogInterface dialog, int which) {                            beginShutdownSequence(context);                            Log.i(TAG, "[SHTDWN] shutdown, confirm=YES");                        }                    })

至此关于代码部分的改动全部完成，接下就添加需要添加使用到的资源了，就是其中使用的字符串，为了简单起见就添加了英文和简体中文：

在对应的资源文件中添加：

frameworks\base\core\res\res\values\strings.xml

<!-- reboot --><string name="global_action_reboot">Reboot</string><string name="reboot_confirm"> Do you want to reboot your device?</string>

frameworks\base\core\res\res\values-zh-rCN\strings.xml

<string name="global_action_reboot">重启</string><string name="reboot_confirm">您要重新启动您的设备吗?</string>

现在已经添加了好这些资源，但是现在还不能使用，此时编译会出现找不到该资源的错误，还需要在frameworks\base\core\res\res\values\symbols.xml（在4.1中是在frameworks\base\core\res\res\values\public.xml）文件中进行资源声明：

<java-symbol type="string" name="global_action_reboot"/><java-symbol type="string" name="reboot_confirm"/>

至此重启功能添加完毕，在编译前执行./mk -t update-api （因为新添加了接口）。当然这仅仅是从框架层上进行修改。

Install: out/target/product/MCT02A_1/system/framework/services.jar
Install: out/target/product/MCT02A_1/system/framework/framework-res.apk
Install: out/target/product/MCT02A_1/system/framework/android.policy.jar
Install: out/target/product/MCT02A_1/system/framework/framework2.jar
Install: out/target/product/MCT02A_1/system/framework/framework.jar