Android的闹钟 [英] Android alarm Clock
本文介绍了Android的闹钟的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
您好，我有这个问题。
LogCat中给我一些错误。
LogCat giving me some errors.
LogCat中：
08-05 11:42:30.222: E/AndroidRuntime(623): FATAL EXCEPTION: main
08-05 11:42:30.222: E/AndroidRuntime(623): java.lang.NullPointerException
08-05 11:42:30.222: E/AndroidRuntime(623): at android.text.format.DateFormat.is24HourFormat(DateFormat.java:204)
08-05 11:42:30.222: E/AndroidRuntime(623): at com.android.alarmclock.Alarms.get24HourMode(Alarms.java:536)
08-05 11:42:30.222: E/AndroidRuntime(623): at com.android.alarmclock.DigitalClock.setDateFormat(DigitalClock.java:192)
08-05 11:42:30.222: E/AndroidRuntime(623): at com.android.alarmclock.DigitalClock.onFinishInflate(DigitalClock.java:121)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.LayoutInflater.rInflate(LayoutInflater.java:631)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.LayoutInflater.rInflate(LayoutInflater.java:626)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
08-05 11:42:30.222: E/AndroidRuntime(623): at com.android.alarmclock.AlarmClock$AlarmTimeAdapter.newView(AlarmClock.java:96)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.widget.CursorAdapter.getView(CursorAdapter.java:182)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.widget.AbsListView.obtainView(AbsListView.java:1430)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.widget.ListView.measureHeightOfChildren(ListView.java:1216)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.widget.ListView.onMeasure(ListView.java:1127)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.View.measure(View.java:8313)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.widget.LinearLayout.measureVertical(LinearLayout.java:386)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.View.measure(View.java:8313)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.View.measure(View.java:8313)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.widget.LinearLayout.measureVertical(LinearLayout.java:531)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.View.measure(View.java:8313)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.View.measure(View.java:8313)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.ViewRoot.performTraversals(ViewRoot.java:839)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.view.ViewRoot.handleMessage(ViewRoot.java:1859)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.os.Handler.dispatchMessage(Handler.java:99)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.os.Looper.loop(Looper.java:123)
08-05 11:42:30.222: E/AndroidRuntime(623): at android.app.ActivityThread.main(ActivityThread.java:3683)
08-05 11:42:30.222: E/AndroidRuntime(623): at java.lang.reflect.Method.invokeNative(Native Method)
08-05 11:42:30.222: E/AndroidRuntime(623): at java.lang.reflect.Method.invoke(Method.java:507)
08-05 11:42:30.222: E/AndroidRuntime(623): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
08-05 11:42:30.222: E/AndroidRuntime(623): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
08-05 11:42:30.222: E/AndroidRuntime(623): at dalvik.system.NativeStart.main(Native Method)
code的位（其中有错误）
A bit of code ( where there are errors )
LogCat中：
08-05 11:42:30.222: E/AndroidRuntime(623): at com.android.alarmclock.Alarms.get24HourMode(Alarms.java:536)
08-05 11:42:30.222: E/AndroidRuntime(623): at com.android.alarmclock.DigitalClock.setDateFormat(DigitalClock.java:192)
08-05 11:42:30.222: E/AndroidRuntime(623): at com.android.alarmclock.DigitalClock.onFinishInflate(DigitalClock.java:121)
code：
static Calendar calculateAlarm(int hour, int minute, Alarm.DaysOfWeek daysOfWeek) {
// start with now
Calendar c = Calendar.getInstance();
c.setTimeInMillis(System.currentTimeMillis());
int nowHour = c.get(Calendar.HOUR_OF_DAY);
int nowMinute = c.get(Calendar.MINUTE);
// if alarm is behind current time, advance one day
if (hour < nowHour ||
hour == nowHour && minute <= nowMinute) {
c.add(Calendar.DAY_OF_YEAR, 1);
}
c.set(Calendar.HOUR_OF_DAY, hour);
c.set(Calendar.MINUTE, minute);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
int addDays = daysOfWeek.getNextAlarm(c);
/* Log.v("** TIMES * " + c.getTimeInMillis() + " hour " + hour +
" minute " + minute + " dow " + c.get(Calendar.DAY_OF_WEEK) + " from now " +
addDays); */
if (addDays > 0) c.add(Calendar.DAY_OF_WEEK, addDays);
return c;
}
static String formatTime(final Context context, int hour, int minute,
Alarm.DaysOfWeek daysOfWeek) {
Calendar c = calculateAlarm(hour, minute, daysOfWeek);
return formatTime(context, c);
}
/* used by AlarmAlert */
static String formatTime(final Context context, Calendar c) {
String format = get24HourMode(context) ? M24 : M12;
return (c == null) ? "" : (String)DateFormat.format(format, c);
}
/**
* Shows day and time -- used for lock screen
*/
private static String formatDayAndTime(final Context context, Calendar c) {
String format = get24HourMode(context) ? DM24 : DM12;
return (c == null) ? "" : (String)DateFormat.format(format, c);
}
/**
* Save time of the next alarm, as a formatted string, into the system
* settings so those who care can make use of it.
*/
static void saveNextAlarm(final Context context, String timeString) {
Settings.System.putString(context.getContentResolver(),
Settings.System.NEXT_ALARM_FORMATTED,
timeString);
}
/**
* @return true if clock is set to 24-hour mode
*/
static boolean get24HourMode(final Context context) {
return android.text.format.DateFormat.is24HourFormat(context);
}
下一页：
LogCat中：
08-05 11:42:30.222: E/AndroidRuntime(623): at com.android.alarmclock.AlarmClock$AlarmTimeAdapter.newView(AlarmClock.java:96)
code：
public View newView(Context context, Cursor cursor, ViewGroup parent) {
View ret = mFactory.inflate(R.layout.alarm_time, parent, false);
((TextView) ret.findViewById(R.id.am)).setText(mAm);
((TextView) ret.findViewById(R.id.pm)).setText(mPm);
DigitalClock digitalClock =
(DigitalClock) ret.findViewById(R.id.digitalClock);
digitalClock.setLive(false);
return ret;
}
项目： https://github.com/android/platform_packages_apps_alarmclock Apache 2.0的
Project: https://github.com/android/platform_packages_apps_alarmclock Apache 2.0
推荐答案
mContext 在 DigitalClock.java 类为空。你必须将它的上下文。
在你的类补充一点：
mContext in the DigitalClock.java class is null. you must set it a context.
add this in your class :
mContext=context;
关于第二个问题。您必须粘贴完整的日志。问题究竟是什么？
About second problem. you must paste complete log. what is the problem?
这篇关于Android的闹钟的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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