Android Java Time Picker Dialog-Collection of common programming errors
hey I am trying to make a TimepickerDialog. But the app crashes soon as I press the Set Time button. Here is the code.
MainActivity:
package com.wifitimer;
import java.text.DateFormat;
import java.util.Calendar;
import android.app.Activity;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.widget.TimePicker;
public class MainActivity extends Activity {
DateFormat formatDateTime=DateFormat.getDateTimeInstance();
Calendar dateTime=Calendar.getInstance();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void chooseTime(){
new TimePickerDialog(this, t, dateTime.get(Calendar.HOUR_OF_DAY), dateTime.get(Calendar.MINUTE), true).show();
}
TimePickerDialog.OnTimeSetListener t = new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
dateTime.set(Calendar.HOUR_OF_DAY, hourOfDay);
dateTime.set(Calendar.MINUTE,minute);
}
};
}
Am I missing some permissions or anything?
Here is the logcat as requested:
04-15 13:42:24.564: D/libEGL(31887): loaded /system/lib/egl/libEGL_mali.so
04-15 13:42:24.589: D/libEGL(31887): loaded /system/lib/egl/libGLESv1_CM_mali.so
04-15 13:42:24.594: D/libEGL(31887): loaded /system/lib/egl/libGLESv2_mali.so
04-15 13:42:24.599: D/(31887): Device driver API match
04-15 13:42:24.599: D/(31887): Device driver API version: 10
04-15 13:42:24.599: D/(31887): User space API version: 10
04-15 13:42:24.599: D/(31887): mali: REVISION=Linux-r2p4-02rel0 BUILD_DATE=Tue Oct 16 15:37:13 KST 2012
04-15 13:42:24.654: D/OpenGLRenderer(31887): Enabling debug mode 0
04-15 13:42:28.524: D/AndroidRuntime(31887): Shutting down VM
04-15 13:42:28.524: W/dalvikvm(31887): threadid=1: thread exiting with uncaught exception (group=0x416922a0)
04-15 13:42:28.544: E/AndroidRuntime(31887): FATAL EXCEPTION: main
04-15 13:42:28.544: E/AndroidRuntime(31887): java.lang.IllegalStateException: Could not find a method chooseTime(View) in the activity class com.wifitimer.MainActivity for onClick handler on view class android.widget.Button with id 'timeBtn'
04-15 13:42:28.544: E/AndroidRuntime(31887): at android.view.View$1.onClick(View.java:3678)
04-15 13:42:28.544: E/AndroidRuntime(31887): at android.view.View.performClick(View.java:4211)
04-15 13:42:28.544: E/AndroidRuntime(31887): at android.view.View$PerformClick.run(View.java:17267)
04-15 13:42:28.544: E/AndroidRuntime(31887): at android.os.Handler.handleCallback(Handler.java:615)
04-15 13:42:28.544: E/AndroidRuntime(31887): at android.os.Handler.dispatchMessage(Handler.java:92)
04-15 13:42:28.544: E/AndroidRuntime(31887): at android.os.Looper.loop(Looper.java:137)
04-15 13:42:28.544: E/AndroidRuntime(31887): at android.app.ActivityThread.main(ActivityThread.java:4898)
04-15 13:42:28.544: E/AndroidRuntime(31887): at java.lang.reflect.Method.invokeNative(Native Method)
04-15 13:42:28.544: E/AndroidRuntime(31887): at java.lang.reflect.Method.invoke(Method.java:511)
04-15 13:42:28.544: E/AndroidRuntime(31887): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
04-15 13:42:28.544: E/AndroidRuntime(31887): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
04-15 13:42:28.544: E/AndroidRuntime(31887): at dalvik.system.NativeStart.main(Native Method)
04-15 13:42:28.544: E/AndroidRuntime(31887): Caused by: java.lang.NoSuchMethodException: chooseTime [class android.view.View]
04-15 13:42:28.544: E/AndroidRuntime(31887): at java.lang.Class.getConstructorOrMethod(Class.java:460)
04-15 13:42:28.544: E/AndroidRuntime(31887): at java.lang.Class.getMethod(Class.java:915)
04-15 13:42:28.544: E/AndroidRuntime(31887): at android.view.View$1.onClick(View.java:3671)
04-15 13:42:28.544: E/AndroidRuntime(31887): ... 11 more
Thanks
-
I think you are calling chooseTime() from your xml layout file onClick attribute you need to change method signature to this
public void chooseTime(View view){ new TimePickerDialog(this, t, dateTime.get(Calendar.HOUR_OF_DAY), dateTime.get(Calendar.MINUTE), true).show(); } -
change method like
public void chooseTime(View view){ new TimePickerDialog(this, t, dateTime.get(Calendar.HOUR_OF_DAY), dateTime.get(Calendar.MINUTE), true).show(); }and in You
xml ControlLike -
==========================mainActivity.java public class MainActivity extends Activity { Button b1; static final int TIME_OPENDIALOG_ID = 0; private int mHour,mMinute; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); b1=(Button)findViewById(R.id.b1); b1.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub showDialog(TIME_OPENDIALOG_ID); updateDisplay(); } }); } private TimePickerDialog.OnTimeSetListener mopenSetListener = new TimePickerDialog.OnTimeSetListener() { public void onTimeSet(TimePicker view, int hourOfDay, int minute) { mHour = hourOfDay; mMinute = minute; updateDisplay(); } }; private Object pad(int mMinute2) { if (mMinute2 >= 10) return String.valueOf(mMinute2); else return "0" + String.valueOf(mMinute2); } private void updateDisplay() { b1.setText(new StringBuilder().append(pad(mHour)).append(":") .append(pad(mMinute))); } protected Dialog onCreateDialog(int id) { switch (id) { case TIME_OPENDIALOG_ID: return new TimePickerDialog(this, mopenSetListener, mHour, mMinute, false); } return null; } } ======================main.xml ======================= Try This ode And For Show TimepickerDialog No Need To Add Any Type Of Permission.