protected void updateClock() { if (mDateFormat == null) { final String dateFormat = getContext().getString(R.string.system_ui_date_pattern); final Locale l = Locale.getDefault(); final String fmt = ICU.getBestDateTimePattern(dateFormat, l.toString()); mDateFormat = new SimpleDateFormat(fmt, l); } mCurrentTime.setTime(System.currentTimeMillis()); final String text = mDateFormat.format(mCurrentTime); if (!text.equals(mLastText)) { setText(text); mLastText = text; } // 实时更新秒 postDelayed(new Runnable() { @Override public void run() { updateClock(); } }, 1000); }这样写,状态栏并没有实时更新秒数
时间: 2024-04-23 13:21:49 浏览: 15
这段代码是一个更新状态栏时间的方法,其中通过获取系统的日期格式,选择合适的格式并将其应用到当前时间上。然后将时间更新到状态栏上,并且每隔一秒钟再次调用该方法,实现实时刷新的效果。
如果状态栏并没有实时更新秒数,可能是因为更新时间的方法没有被正确调用。可以检查是否已经在合适的地方调用了该方法,或者在调用该方法之前是否进行了必要的初始化操作。也可以在方法中增加一些调试信息,查看是否有错误发生。
相关问题
private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { final String action = intent.getAction(); if (Intent.ACTION_TIME_TICK.equals(action) || Intent.ACTION_TIME_CHANGED.equals(action) || Intent.ACTION_TIMEZONE_CHANGED.equals(action) || Intent.ACTION_LOCALE_CHANGED.equals(action)) { if (Intent.ACTION_LOCALE_CHANGED.equals(action) || Intent.ACTION_TIMEZONE_CHANGED.equals(action)) { // need to get a fresh date format mDateFormat = null; } updateClock(); } } }; public DateView(Context context, AttributeSet attrs) { super(context, attrs); } @Override protected void onAttachedToWindow() { super.onAttachedToWindow(); IntentFilter filter = new IntentFilter(); filter.addAction(Intent.ACTION_TIME_TICK); filter.addAction(Intent.ACTION_TIME_CHANGED); filter.addAction(Intent.ACTION_TIMEZONE_CHANGED); filter.addAction(Intent.ACTION_LOCALE_CHANGED); mContext.registerReceiver(mIntentReceiver, filter, null, null); updateClock(); } @Override protected void onDetachedFromWindow() { super.onDetachedFromWindow(); mDateFormat = null; // reload the locale next time mContext.unregisterReceiver(mIntentReceiver); } protected void updateClock() { if (mDateFormat == null) { final String dateFormat = getContext().getString(R.string.system_ui_date_pattern); final Locale l = Locale.getDefault(); final String fmt = ICU.getBestDateTimePattern(dateFormat, l.toString()); mDateFormat = new SimpleDateFormat(fmt, l); } mCurrentTime.setTime(System.currentTimeMillis()); final String text = mDateFormat.format(mCurrentTime); if (!text.equals(mLastText)) { setText(text); mLastText = text; } } }
这段代码是一个自定义View,名为DateView,用来显示当前时间。它通过监听系统时间改变的广播(`Intent.ACTION_TIME_TICK`、`Intent.ACTION_TIME_CHANGED`、`Intent.ACTION_TIMEZONE_CHANGED`、`Intent.ACTION_LOCALE_CHANGED`)来更新时间显示,同时使用`ICU.getBestDateTimePattern()`方法和`SimpleDateFormat`类来格式化时间。具体步骤如下:
1. 在`onAttachedToWindow()`方法中注册广播接收器,同时调用`updateClock()`方法更新时间显示。
2. 在`onDetachedFromWindow()`方法中取消广播接收器的注册。
3. 在`updateClock()`方法中,首先检查`mDateFormat`是否为空,如果是,则使用系统默认的时间格式字符串(来自`R.string.system_ui_date_pattern`)和当前系统的语言环境(通过`Locale.getDefault()`方法)来生成`mDateFormat`对象。
4. 然后,通过`System.currentTimeMillis()`方法获取当前系统时间,并使用`mDateFormat`对象将时间格式化为字符串。
5. 最后,将格式化后的时间字符串设置到View中显示。
需要注意的是,这段代码并没有提供修改状态栏显示时分秒的功能,如果您需要实现类似的功能,可以考虑在`updateClock()`方法中修改时间格式参数,比如将`HH:mm:ss`改为`HH:mm`来显示时分。
private void updateShowSeconds() { if (mShowSeconds) { // Wait until we have a display to start trying to show seconds. if (mSecondsHandler == null && getDisplay() != null) { mSecondsHandler = new Handler(); if (getDisplay().getState() == Display.STATE_ON) { mSecondsHandler.postAtTime(mSecondTick, SystemClock.uptimeMillis() / 1000 * 1000 + 1000); } IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF); filter.addAction(Intent.ACTION_SCREEN_ON); mContext.registerReceiver(mScreenReceiver, filter); } } else { if (mSecondsHandler != null) { mContext.unregisterReceiver(mScreenReceiver); mSecondsHandler.removeCallbacks(mSecondTick); mSecondsHandler = null; updateClock(); } } } private final BroadcastReceiver mScreenReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (Intent.ACTION_SCREEN_OFF.equals(action)) { if (mSecondsHandler != null) { mSecondsHandler.removeCallbacks(mSecondTick); } } else if (Intent.ACTION_SCREEN_ON.equals(action)) { if (mSecondsHandler != null) { mSecondsHandler.postAtTime(mSecondTick, SystemClock.uptimeMillis() / 1000 * 1000 + 1000); } } } }; private final Runnable mSecondTick = new Runnable() { @Override public void run() { if (mCalendar != null) { updateClock(); } mSecondsHandler.postAtTime(this, SystemClock.uptimeMillis() / 1000 * 1000 + 1000); } }; } Android4.4编译报错getDisplay().getState(
根据您提供的代码,可能是因为在Android4.4中没有`getDisplay().getState()`这个方法而导致编译报错。可以尝试使用`getSystemService(Context.WINDOW_SERVICE).getDefaultDisplay().getState()`来获取屏幕状态。请修改代码如下:
```
private void updateShowSeconds() {
if (mShowSeconds) {
// Wait until we have a display to start trying to show seconds.
if (mSecondsHandler == null && getSystemService(Context.WINDOW_SERVICE).getDefaultDisplay() != null) {
mSecondsHandler = new Handler();
if (getSystemService(Context.WINDOW_SERVICE).getDefaultDisplay().getState() == Display.STATE_ON) {
mSecondsHandler.postAtTime(mSecondTick, SystemClock.uptimeMillis() / 1000 * 1000 + 1000);
}
IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF);
filter.addAction(Intent.ACTION_SCREEN_ON);
mContext.registerReceiver(mScreenReceiver, filter);
}
} else {
if (mSecondsHandler != null) {
mContext.unregisterReceiver(mScreenReceiver);
mSecondsHandler.removeCallbacks(mSecondTick);
mSecondsHandler = null;
updateClock();
}
}
}
private final BroadcastReceiver mScreenReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (Intent.ACTION_SCREEN_OFF.equals(action)) {
if (mSecondsHandler != null) {
mSecondsHandler.removeCallbacks(mSecondTick);
}
} else if (Intent.ACTION_SCREEN_ON.equals(action)) {
if (mSecondsHandler != null) {
mSecondsHandler.postAtTime(mSecondTick, SystemClock.uptimeMillis() / 1000 * 1000 + 1000);
}
}
}
};
private final Runnable mSecondTick = new Runnable() {
@Override
public void run() {
if (mCalendar != null) {
updateClock();
}
mSecondsHandler.postAtTime(this, SystemClock.uptimeMillis() / 1000 * 1000 + 1000);
}
};
```