Android DatePickerDialog错误 [英] Android DatePickerDialog error
本文介绍了Android DatePickerDialog错误的处理方法，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
大家好，
我正在制作一些应用程序而且我有一些错误，我无法解决，我在谷歌搜索但没有任何帮助我。
我有Main class和Lasta类，Lasta是类的名字。
在Main类我只有这个代码：
Hello people,
I am making some application and I have some error, which I can not solve, I searched on google but nothing helped me.
I have Main class and "Lasta" class, Lasta is name of class.
In Main class I only have this code:
package com.nemanjapetrovic.ndevelope.lasta;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity
{
//Global variable
Lasta lasta = new Lasta();
//Controls ID's
Button date,time,search;
EditText from_station,to_station;
// ------------------ Load ------------------
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Controls
date = (Button)findViewById(R.id.date);
time = (Button)findViewById(R.id.time);
search = (Button)findViewById(R.id.search);
from_station = (EditText)findViewById(R.id.from_station);
to_station = (EditText)findViewById(R.id.to_station);
date.setText(lasta.get_DATE());
time.setText(lasta.get_TIME());
}
public void dateButton_OnClick(View v)
{
lasta.DateChange();
date.setText(lasta.get_DATE());
}
public void timeButton_OnClick(View v)
{
lasta.TimeChange();
time.setText(lasta.get_TIME());
}
public void seachButton_OnClick(View v)
{
lasta.Search();
}
}
在另一个班级，Lasta班级我有方法谁创建了DatePickerDialog，还有TimePickerDialog。
这是一个代码：
In another class, Lasta class I have method who creates DatePickerDialog, and also TimePickerDialog.
Here is a code:
package com.nemanjapetrovic.ndevelope.lasta;
import android.app.Activity;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import android.app.DatePickerDialog;
import android.app.TimePickerDialog;
import android.widget.DatePicker;
import android.widget.TimePicker;
import android.os.Bundle;
import android.view.View;
public class Lasta extends Activity
{
//Global variables
//Variable data for JSON
private String _STATION_FROM;
private String _STATION_TO;
private String _DATE;
private String _TIME;
//Variable for date/time picker dialog change
private Calendar nowCalendar = Calendar.getInstance();
//------------------ Constructors ------------------
//Default constructor
public Lasta()
{
//Set station variables to ""
this._STATION_FROM = "";
this._STATION_TO = "";
//Set date variable
UpdateDATE();
//Set time variable
UpdateTIME();
}
//Constructor that sets all elements
public Lasta(String sf, String st, String d, String t)
{
this._STATION_FROM = sf;
this._STATION_TO = st;
this._DATE = d;
this._TIME = t;
}
// ------------------ DateChange ------------------
HERE I AM GETTING AN ERROR
//DatePickerDialog.OnDateSetListener
private DatePickerDialog.OnDateSetListener dateDialog = new DatePickerDialog.OnDateSetListener()
{
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth)
{
//Set new data
nowCalendar.set(Calendar.YEAR, year);
nowCalendar.set(Calendar.MONTH, monthOfYear);
nowCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
UpdateDATE();
}
};
HERE I AM GETTING AN ERROR
//Calling from MAIN
//Method for creating PickerDialog and changing _DATE
public void DateChange()
{
//This DatePickerDialog calls DatePickerDialog.OnDateSetListener which sets all data for Calendar
new DatePickerDialog(this, DatePickerDialog.THEME_HOLO_DARK, dateDialog, nowCalendar.get(Calendar.YEAR), nowCalendar.get(Calendar.MONTH), nowCalendar.get(Calendar.DAY_OF_MONTH)).show();
}
private void UpdateDATE()
{
//Set new _DATE
SimpleDateFormat df = new SimpleDateFormat("dd/MM/yyyy"); //Formating date
this._DATE = df.format(this.nowCalendar.getTime());
}
我在方法中遇到错误：
I am getting an error in method called:
public void DateChange()
{
//This DatePickerDialog calls DatePickerDialog.OnDateSetListener which sets all data for Calendar
new DatePickerDialog(this, DatePickerDialog.THEME_HOLO_DARK, dateDialog, nowCalendar.get(Calendar.YEAR), nowCalendar.get(Calendar.MONTH), nowCalendar.get(Calendar.DAY_OF_MONTH)).show();
}
这是错误代码：
04-18 21：53：14.192 ：E / AndroidRuntime（31880）：
Here is an error code:
04-18 21:53:14.192: E/AndroidRuntime(31880):
FATAL EXCEPTION: main
04-18 21:53:14.192: E/AndroidRuntime(31880): java.lang.IllegalStateException: Could not execute method of the activity
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.view.View$1.onClick(View.java:3804)
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.view.View.performClick(View.java:4439)
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.widget.Button.performClick(Button.java:139)
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.view.View$PerformClick.run(View.java:18395)
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.os.Handler.handleCallback(Handler.java:725)
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.os.Handler.dispatchMessage(Handler.java:92)
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.os.Looper.loop(Looper.java:176)
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.app.ActivityThread.main(ActivityThread.java:5319)
04-18 21:53:14.192: E/AndroidRuntime(31880): at java.lang.reflect.Method.invokeNative(Native Method)
04-18 21:53:14.192: E/AndroidRuntime(31880): at java.lang.reflect.Method.invoke(Method.java:511)
04-18 21:53:14.192: E/AndroidRuntime(31880): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
04-18 21:53:14.192: E/AndroidRuntime(31880): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
04-18 21:53:14.192: E/AndroidRuntime(31880): at dalvik.system.NativeStart.main(Native Method)
04-18 21:53:14.192: E/AndroidRuntime(31880): Caused by: java.lang.reflect.InvocationTargetException
04-18 21:53:14.192: E/AndroidRuntime(31880): at java.lang.reflect.Method.invokeNative(Native Method)
04-18 21:53:14.192: E/AndroidRuntime(31880): at java.lang.reflect.Method.invoke(Method.java:511)
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.view.View$1.onClick(View.java:3799)
04-18 21:53:14.192: E/AndroidRuntime(31880): ... 12 more
04-18 21:53:14.192: E/AndroidRuntime(31880): Caused by: java.lang.IllegalStateException: System services not available to Activities before onCreate()
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.app.Activity.getSystemService(Activity.java:4662)
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.app.Dialog.<init>(Dialog.java:164)
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.app.AlertDialog.<init>(AlertDialog.java:114)
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.app.AlertDialog.<init>(AlertDialog.java:110)
04-18 21:53:14.192: E/AndroidRuntime(31880): at android.app.DatePickerDialog.<init>(DatePickerDialog.java:113)
04-18 21:53:14.192: E/AndroidRuntime(31880): at com.nemanjapetrovic.ndevelope.lasta.Lasta.DateChange(Lasta.java:99)
04-18 21:53:14.192: E/AndroidRuntime(31880): at com.nemanjapetrovic.ndevelope.lasta.MainActivity.dateButton_OnClick(MainActivity.java:40)
对不起这么久题。谢谢！
Sorry for this long question. Thank you!
推荐答案
1.onClick（View.java:3804）
04-18 21：53：14.192：E / AndroidRuntime（31880）：在android.view.View.performClick（View.java:4439）
04-18 21：53：14.192：E / AndroidRuntime（31880）：在android.widget.Button.performClick（Button.java:139）
04-18 21：53：14.192：E / AndroidRuntime（31880）：在android.view.View
1.onClick(View.java:3804) 04-18 21:53:14.192: E/AndroidRuntime(31880): at android.view.View.performClick(View.java:4439) 04-18 21:53:14.192: E/AndroidRuntime(31880): at android.widget.Button.performClick(Button.java:139) 04-18 21:53:14.192: E/AndroidRuntime(31880): at android.view.View
PerformClick.run（View.java:18395）
04-18 21：53：14.192：E / AndroidRuntime（31880）：在android.os.Handler.handleCallback（Handler.java:725）
04-18 21：53：14.192：E / AndroidRuntime（31880） ）：在android.os.Handler.dispatchMessage（Handler.java:92）
04-18 21：53：14.192：E / AndroidRuntime（31880）：在android.os.Looper.loop（Looper.java： 176）
04-18 21：53：14.192：E / AndroidRuntime（31880）：在android.app.ActivityThread.main（ActivityThread.java:5319）
04-18 21：53：14.192： E / AndroidRuntime（31880）：at java.lang.reflect.Method.invokeNative（Native Method）
04-18 21：53：14.192：E / An droidRuntime（31880）：at java.lang.reflect.Method.invoke（Method.java:511)
04-18 21：53：14.192：E / AndroidRuntime（31880）：at com.android.internal.os .ZygoteInit
PerformClick.run(View.java:18395) 04-18 21:53:14.192: E/AndroidRuntime(31880): at android.os.Handler.handleCallback(Handler.java:725) 04-18 21:53:14.192: E/AndroidRuntime(31880): at android.os.Handler.dispatchMessage(Handler.java:92) 04-18 21:53:14.192: E/AndroidRuntime(31880): at android.os.Looper.loop(Looper.java:176) 04-18 21:53:14.192: E/AndroidRuntime(31880): at android.app.ActivityThread.main(ActivityThread.java:5319) 04-18 21:53:14.192: E/AndroidRuntime(31880): at java.lang.reflect.Method.invokeNative(Native Method) 04-18 21:53:14.192: E/AndroidRuntime(31880): at java.lang.reflect.Method.invoke(Method.java:511) 04-18 21:53:14.192: E/AndroidRuntime(31880): at com.android.internal.os.ZygoteInit
MethodAndArgsCaller.run（ZygoteInit.java:1102)
04-18 21：53：14.192：E / AndroidRuntime（31880）：at com.android.internal。 os.ZygoteInit.main（ZygoteInit.java:869）
04-18 21：53：14.192：E / AndroidRuntime（31880）：at dalvik.system.NativeStart.main（Native Method）
04- 18 21：53：14.192：E / AndroidRuntime（31880）：引起：java.lang.reflect.InvocationTargetException
04-18 21：53：14.192：E / AndroidRuntime（31880）：at java.lang.reflect .Method.invokeNative（Native Method）
04-18 21：53：14.192：E / AndroidRuntime（31880）：at java.lang.reflect.Method.invoke（Method.java:511)
04 -18 21：53：14.192：E / AndroidRuntime（31880）：在android.view.View
MethodAndArgsCaller.run(ZygoteInit.java:1102) 04-18 21:53:14.192: E/AndroidRuntime(31880): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869) 04-18 21:53:14.192: E/AndroidRuntime(31880): at dalvik.system.NativeStart.main(Native Method) 04-18 21:53:14.192: E/AndroidRuntime(31880): Caused by: java.lang.reflect.InvocationTargetException 04-18 21:53:14.192: E/AndroidRuntime(31880): at java.lang.reflect.Method.invokeNative(Native Method) 04-18 21:53:14.192: E/AndroidRuntime(31880): at java.lang.reflect.Method.invoke(Method.java:511) 04-18 21:53:14.192: E/AndroidRuntime(31880): at android.view.View
这篇关于Android DatePickerDialog错误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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