android 记事

来源：互联网发布：最优化导论中文版编辑：程序博客网时间：2024/04/25 02:02

一、隐藏状态栏

隐藏状态栏，看到网上的方法，试了一下，达到了想要的效果

android4.0/frameworks/base/core/res/res/values-large/dimens.xml
android4.0/frameworks/base/core/res/res/values-sw480dp/dimens.xml
android4.0/frameworks/base/core/res/res/values-sw600dp/dimens.xml
android4.0/frameworks/base/core/res/res/values/dimens.xml
android4.0/packages/apps/Launcher2/res/values-sw480dp/dimens.xml
android4.0/packages/apps/Launcher2/res/values-sw600dp/dimens.xml
android4.0/packages/apps/Launcher2/res/values/dimens.xml

hide statusbar
grep "status_bar_height" * -nR
将下面文件中关于status_bar_height定义的改为0dip

二、

android 关机的两个方法：

1、调用方法ShutdownThread.shutdown(mContext, true); 第二个参数标记是否弹出确认框。第一次我用这个方法，机器只是跑完动画重启了一下，并没有关机，后来我把true改成了false，跑完动画后关机了，疑点：不知道为什么会跑动画。

private final Runnable mPowerLongPress = new Runnable() {
public void run() {
// The context isn't read
if (mLongPressOnPowerBehavior < 0) {
mLongPressOnPowerBehavior = mContext.getResources().getInteger(
com.android.internal.R.integer.config_longPressOnPowerBehavior);
}
switch (mLongPressOnPowerBehavior) {
case LONG_PRESS_POWER_NOTHING:
break;
case LONG_PRESS_POWER_GLOBAL_ACTIONS:
mPowerKeyHandled = true;
performHapticFeedbackLw(null, HapticFeedbackConstants.LONG_PRESS, false);
sendCloseSystemWindows(SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS);
showGlobalActionsDialog();
break;
case LONG_PRESS_POWER_SHUT_OFF:
mPowerKeyHandled = true;
performHapticFeedbackLw(null, HapticFeedbackConstants.LONG_PRESS, false);
sendCloseSystemWindows(SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS);
ShutdownThread.shutdown(mContext, true);
break;
}
}
};

2、启动一个activity：

第二次用的这个方法，直接关机。

Intent intent1 = new Intent(Intent.ACTION_REQUEST_SHUTDOWN); //add by pcc close
intent1.putExtra(Intent.EXTRA_KEY_CONFIRM, false);
intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mContext.startActivity(intent1);

3、区分usb电流还是直流AC

   private synchronized final void update() {
native_update();
processValues();
}

private void processValues() {
boolean logOutlier = false;
long dischargeDuration = 0;
//int flags= -1;
mBatteryLevelCritical = mBatteryLevel <= mCriticalBatteryLevel;
if (mAcOnline) {

mPlugType = BatteryManager.BATTERY_PLUGGED_AC;
} else if (mUsbOnline) {

mPlugType = BatteryManager.BATTERY_PLUGGED_USB;
} else{

mPlugType = BATTERY_PLUGGED_NONE;



}

..........