我一直在寻找几个小时没有运气。我正在使用 Eclipse 创建一个带有 timepicker 和 datepicker 的 Android 应用程序，当我在 OnCreateDialog 中调用 timepicker 侦听器时，datepicker 工作正常，它出现 timePickerListener 无法解析为变量错误。
我遵循了一大堆示例，在我看来，我正在复制这些示例，但无法摆脱这个错误。特别是这个问题底部的决议
使用 DatePicker 和 TimePicker 对话框 - Eclipse 中的 Android Java
我的java代码如下：
private TextView tvDisplayDate;
private DatePicker dpResult;
private TimePicker timepicker;
private Button infringementbutton;
private Button timebutton;
private TextView tvDisplayDate2;
private TextView tvDisplayTime;
private int year;
private int month;
private int day;
private int yearA;
private int monthA;
private int dayA;
private int hour;
private int minute;
static final int DATE_DIALOG_ID = 1;
static final int TIME_DIALOG_ID = 2;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setCurrentDateOnView();
setCurrentTimeOnView();
addListenerOnButton();
}
// display current date
public void setCurrentDateOnView() {
tvDisplayDate = (TextView) findViewById(R.id.tvDate);
tvDisplayDate2 = (TextView) findViewById(R.id.tvDateA);
dpResult = (DatePicker) findViewById(R.id.dpResult);
final Calendar c = Calendar.getInstance();
year = c.get(Calendar.YEAR);
month = c.get(Calendar.MONTH);
day = c.get(Calendar.DAY_OF_MONTH);
hour = c.get(Calendar.HOUR_OF_DAY);
minute = c.get(Calendar.MINUTE);
// set current date into textview
tvDisplayDate.setText(new StringBuilder()
// Month is 0 based, just add 1
.append(day).append("-").append(month + 1).append("-")
.append(year).append(" "));
c.add(Calendar.DAY_OF_MONTH, 42);
dayA = c.get(Calendar.DAY_OF_MONTH);
monthA = c.get(Calendar.MONTH);
yearA = c.get(Calendar.YEAR);
tvDisplayDate2.setText(new StringBuilder()
// Month is 0 based, just add 1
.append(dayA).append("-").append(monthA + 1).append("-")
.append(yearA).append(" "));
// set current date into datepicker
dpResult.init(year, month, day, null);
}
//Display current time
public void setCurrentTimeOnView() {
tvDisplayTime = (TextView) findViewById(R.id.tvTime);
timepicker = (TimePicker) findViewById(R.id.timepicker);
// set current time into textview
tvDisplayTime.setText(
new StringBuilder().append(pad(hour))
.append(":").append(pad(minute)));
// set current time into timepicker
timepicker.setCurrentHour(hour);
timepicker.setCurrentMinute(minute);
}
public void addListenerOnButton() {
infringementbutton = (Button) findViewById(R.id.infringementbutton);
timebutton = (Button) findViewById(R.id.timebutton);
infringementbutton.setOnClickListener(new OnClickListener() {
@SuppressWarnings("deprecation")
@Override
public void onClick(View view) {
showDialog(DATE_DIALOG_ID);
}
});
timebutton.setOnClickListener(new View.OnClickListener() {
@SuppressWarnings("deprecation")
@Override
public void onClick(View v) {
showDialog(TIME_DIALOG_ID);
}
});
}
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
// set date picker as current date
return new DatePickerDialog(this, datePickerListener,
year, month,day);
break;
switch (id) {
case TIME_DIALOG_ID:
// set time picker as current time
return new TimePickerDialog(this,
timePickerListener, hour, minute,false);}
return null;
}}
private DatePickerDialog.OnDateSetListener datePickerListener
= new DatePickerDialog.OnDateSetListener() {
// when dialog box is closed, below method will be called.
public void onDateSet(DatePicker view, int selectedYear,
int selectedMonth, int selectedDay) {
year = selectedYear;
month = selectedMonth;
day = selectedDay;
// set selected date into textview
tvDisplayDate.setText(new StringBuilder()
.append(day).append("-").append(month + 1).append("-").append(year)
.append(" "));
Calendar c = new GregorianCalendar();
c.set(Calendar.YEAR,year);
c.set(Calendar.MONTH, month);
c.set(Calendar.DAY_OF_MONTH, day);
c.add(Calendar.DAY_OF_MONTH,42);
dayA = c.get(Calendar.DAY_OF_MONTH);
monthA = c.get(Calendar.MONTH);
yearA = c.get(Calendar.YEAR);
tvDisplayDate2.setText(new StringBuilder()
.append(dayA).append("-").append(monthA + 1).append("-").append(yearA)
.append(" "));
// set selected date into datepicker also
dpResult.init(year, month, day, null);
}
private TimePickerDialog.OnTimeSetListener timePickerListener =
new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int selectedHour,
int selectedMinute) {
hour = selectedHour;
minute = selectedMinute;
// set current time into textview
tvDisplayTime.setText(new StringBuilder().append(pad(hour))
.append(":").append(pad(minute)));
// set current time into timepicker
timepicker.setCurrentHour(hour);
timepicker.setCurrentMinute(minute);
}
};
};
private static String pad(int c) {
if (c >= 10)
return String.valueOf(c);
else
return "0" + String.valueOf(c);
}
这是main.xml
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/ScrollView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1">
<TableLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="@dimen/margin"
android:orientation="vertical"
tools:context=".MainActivity" >
<TableRow>
<Button
android:id="@+id/infringementbutton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/infringement"
/>
<DatePicker
android:id="@+id/dpResult"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:visibility="gone" />
<TextView
android:id="@+id/tvDate"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
</TableRow><TableRow>
<Button
android:id="@+id/button2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/penaltydate" />
<TextView
android:id="@+id/tvDateA"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
</TableRow>
<TableRow >
<Button
android:id="@+id/timebutton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/time"
/>
<TimePicker
android:id="@+id/timepicker"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:visibility="gone" />
<TextView
android:id="@+id/tvTime"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text=""
android:textAppearance="?android:attr/textAppearanceLarge" />
</TableRow>
希望代码不会太混乱，因为我只是这方面的新手。谢谢。