我有一个活动中包含3个按钮。第一个按钮用于使用EditText启动自定义AlertDialog。第二个按钮需要打开DatePicker。第三个按钮需要打开TimePicker。我有第一个按钮正常工作,我有第二个按钮需要的代码,但我能让代码工作的唯一方法是创建一个不同的活动。
我需要做什么才能在同一个Activity中实现所有这三件事?它是否可能,我对所有这些东西都很陌生,所以任何基本到高级的建议都会很棒!
这是带有三个按钮的活动代码,所有这些按钮都在相应的XML文件中声明。这是我目前拥有的代码,这意味着只有AlertDialog的代码才能正常工作:
package com.example.test_project;
import java.util.Calendar;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TextView;
public class NewWorkout extends Activity {
@Override
protected void onCreate(Bundle onSaveInstanceState) {
super.onCreate(onSaveInstanceState);
setContentView(R.layout.activity_new_workout);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.new_workout, menu);
return true;
}
public void timeOfWorkout(View view){
Intent intent = new Intent(this, TimePickerFragment.class);
startActivity(intent);
}
int mYear;
int mMonth;
int mDay;
TextView mDateDisplay;
final int DATE_DIALOG_ID = 0;
public void onCreate1(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_new_workout);
mDateDisplay = (TextView) findViewById(R.id.timeOfWorkoutTextView);
Button button = (Button) findViewById(R.id.dateOfWorkoutButton);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// get the current date
final Calendar c = Calendar.getInstance();
mYear = c.get(Calendar.YEAR);
mMonth = c.get(Calendar.MONTH);
mDay = c.get(Calendar.DAY_OF_MONTH);
// display the current date
updateDisplay();
}
});
DatePickerDialog.OnDateSetListener mDateSetListener =
new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year,
int monthOfYear, int dayOfMonth) {
mYear = year;
mMonth = monthOfYear;
mDay = dayOfMonth;
updateDisplay();
}
};
}
private void updateDisplay() {
this.mDateDisplay.setText(
new StringBuilder()
// Month is 0 based so add 1
.append(mMonth + 1).append("-")
.append(mDay).append("-")
.append(mYear).append(" "));
}
public void nameOfWorkout(View view){
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Enter a Name for This Workout");
// Set an EditText view to get user input
final EditText input = new EditText(this);
alert.setView(input);
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
String value = input.getText().toString();
TextView edit = (TextView) findViewById(R.id.nameOfWorkoutTextView);
edit.setText(value);
}
});
alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
// Canceled.
}
});
alert.show();
}
}
您应该使用Dialog Fragment实现DatePicker和TimePicker。
以下是来自this documentation:的一些样本
public static class TimePickerFragment extends DialogFragment
implements TimePickerDialog.OnTimeSetListener {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
// Create a new instance of TimePickerDialog and return it
return new TimePickerDialog(getActivity(), this, hour, minute,
DateFormat.is24HourFormat(getActivity()));
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
// Do something with the time chosen by the user
}
}
您可以使用时间选择器关闭按钮,如下所示:
在你的xml中:
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/pick_time"
android:onClick="showTimePickerDialog" />
然后在你的活动中:
public void showTimePickerDialog(View v) {
FragmentManager manager = getSupportFragmentManager();
DialogFragment timePickerFragment = new TimePickerFragment();
timePickerFragment.show(manager, "timePicker");
}
尝试使用此代码进行日期和时间选择器对话框
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_event_details_list);
calendarDataInit();
initViews();
}
private void calendarDataInit() {
mYear = c.get(Calendar.YEAR);
mMonth = c.get(Calendar.MONTH);
mDay = c.get(Calendar.DAY_OF_MONTH);
mHour = c.get(Calendar.HOUR_OF_DAY);
mMinute = c.get(Calendar.MINUTE);
}
private void initViews() {
imgViewDatePicker = (ImageView) findViewById(R.id.imgViewDatePicker);
imgViewTimePicker = (ImageView) findViewById(R.id.imgViewTimePicker);
imgViewDatePicker.setOnClickListener(this);
imgViewTimePicker.setOnClickListener(this);
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.imgViewDatePicker:
showDialog(DATE_DIALOG_ID);
break;
case R.id.imgViewTimePicker:
showDialog(TIME_DIALOG_ID);
break;
private DatePickerDialog.OnDateSetListener mDateSetListener =
new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year,
int monthOfYear, int dayOfMonth) {
mYear = year;
mMonth = monthOfYear;
mDay = dayOfMonth;
updateDate();
}
private void updateDate() {
adapter.resetData();
StringBuilder dateEvent = new StringBuilder().append(mYear).append("-").append(padMonth(mMonth + 1))
.append("-")
.append(mDay);
editTxtDtae.setText(dateEvent);
editTxtDtae.requestFocus();
}
};
private static String padMonth(int c) {
if (c >= 10)
return String.valueOf(c);
else
return "0" + String.valueOf(c);
}
// Timepicker dialog generation
private TimePickerDialog.OnTimeSetListener mTimeSetListener =
new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
mHour = hourOfDay;
mMinute = minute;
updatetime();
}
private void updatetime() {
adapter.resetData();
String am_pm;
if(mHour > 12) {
am_pm = "PM";
mHour = mHour - 12;
} else {
am_pm = "AM";
}
timeEvent = new StringBuilder().append(mHour)
.append(":").append(mMinute).append(am_pm);
editTxtTime.setText(timeEvent);
}
};
private static String pad(int c) {
if (c >= 10)
return String.valueOf(c);
else
return "0" + String.valueOf(c);
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(this,
mDateSetListener,
mYear, mMonth, mDay);
case TIME_DIALOG_ID:
return new TimePickerDialog(this,
mTimeSetListener, mHour, mMinute, false);
}
return null;
}
}