RK3288_Android_8.1_定频关机

板子链接: http://www.itayga.com/contact.html.

代码路径：frameworks\base\packages\SystemUI\src\com\android\systemui\globalactions\GlobalActionsDialog.java

private final class PowerAction extends SinglePressAction implements LongPressAction {private PowerAction() {super(R.drawable.ic_lock_power_off,R.string.global_action_power_off);}@Overridepublic boolean onLongPress() {UserManager um = (UserManager) mContext.getSystemService(Context.USER_SERVICE);if (!um.hasUserRestriction(UserManager.DISALLOW_SAFE_BOOT)) {mWindowManagerFuncs.reboot(true);return true;}return false;}@Overridepublic boolean showDuringKeyguard() {return true;}@Overridepublic boolean showBeforeProvisioning() {return true;}@Overridepublic void onPress() {// shutdown by making sure radio and power are handled accordingly.//mWindowManagerFuncs.shutdown();Log.d("tyzc","mWindowManagerFuncs.shutdown(false ");setNodeString("/sys/devices/system/cpu/cpufreq/policy0/scaling_governor","userspace");//更改cpu       setNodeString("/sys/devices/system/cpu/cpufreq/policy0/scaling_setspeed","1008000");//更改频率mWindowManagerFuncs.shutdown();}}
public static boolean setNodeString(String path,String value){try {BufferedWriter bufWriter = null;bufWriter = new BufferedWriter(new FileWriter(path));bufWriter.write(value);  // 写入数据bufWriter.close();Log.d("tyzc","Rewrite the node--"+path+"--to--"+value+" success!");} catch (IOException e) {e.printStackTrace();Log.d("tyzc","Rewrite the node--"+path+"--to--"+value+"--failure!");//如果失败，可能是节点的权限不够，在init.rc文件中添加 //chown system system /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor//chmod 0666 /sys/devices/system/cpu/cpu0/cpufreq/scaling_governorreturn false;}return true;}

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