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代码路径:frameworksbasepackagesSystemUIsrccomandroidsystemuiglobalactionsGlobalActionsDialog.java
private final class PowerAction extends SinglePressAction implements LongPressAction { private PowerAction() { super(R.drawable.ic_lock_power_off, R.string.global_action_power_off); } @Override public boolean onLongPress() { UserManager um = (UserManager) mContext.getSystemService(Context.USER_SERVICE); if (!um.hasUserRestriction(UserManager.DISALLOW_SAFE_BOOT)) { mWindowManagerFuncs.reboot(true); return true; } return false; } @Override public boolean showDuringKeyguard() { return true; } @Override public boolean showBeforeProvisioning() { return true; } @Override public 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_governor return false; } return true; } |
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