Hi, sorry, I figured out the problem: I forgot to copy this piece of
the code.
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(this,
mDateSetListener,
mYear, mMonth, mDay);
}
return null;
}
For those still struggling: here is the complete
HelloDatePicker.java:
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Button;
import android.widget.DatePicker;
import android.view.View;
import java.util.Calendar;
public class HelloDatePicker extends Activity
{
private TextView mDateDisplay;
private Button mPickDate;
private int mYear;
private int mMonth;
private int mDay;
static final int DATE_DIALOG_ID = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// capture our View elements
mDateDisplay = (TextView) findViewById(R.id.dateDisplay);
mPickDate = (Button) findViewById(R.id.pickDate);
// add a click listener to the button
mPickDate.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
showDialog(DATE_DIALOG_ID);
}
});
// 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();
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(this,
mDateSetListener,
mYear, mMonth, mDay);
}
return null;
}
// updates the date we display in the TextView
private void updateDisplay() {
mDateDisplay.setText(
new StringBuilder()
// Month is 0 based so add 1
.append(mMonth + 1).append("-")
.append(mDay).append("-")
.append(mYear).append(" "));
}
// the callback received when the user "sets" the date in the
dialog
private DatePickerDialog.OnDateSetListener mDateSetListener =
new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year,
int monthOfYear, int dayOfMonth)
{
mYear = year;
mMonth = monthOfYear;
mDay = dayOfMonth;
updateDisplay();
}
};
}
On Nov 20 2009, 11:09 pm, Justin Anderson <janderson....@gmail.com>
wrote:
> I'm pretty sure this isn't the cause of the problem, but I am curious why
> your XML file has your button set to not be clickable... Seems odd since
> you are trying to click that buttong...
> ----------------------------------------------------------------------
> There are only 10 types of people in the world...
> Those who know binary and those who don't.
> ----------------------------------------------------------------------
>
> On Tue, Nov 3, 2009 at 7:29 PM, 大方 <yangfang_1...@163.com> wrote:
> > Hello,guys!
> > I encountered a problem while I run the application below.The UI can
> > appear in the emulator screen normally,but while I click the button
> > the bug appears.Below I attach the source and the logcat:
>
> > the source code:
>
> > HelloDatePicker.java
>
> > package HelloDatePicker.pkg;
> > import java.util.Calendar;
> > import android.app.Activity;
> > import android.app.DatePickerDialog;
> > import android.app.Dialog;
> > import android.os.Bundle;
> > import android.view.View;
> > import android.widget.Button;
> > import android.widget.DatePicker;
> > import android.widget.TextView;
>
> > public class HelloDatePickerAct extends Activity {
> > /** Called when the activity is first created. */
> > private TextView mDateDisplay;
> > private Button mPickDate;
> > private int mYear;
> > private int mMonth;
> > private int mDay;
> > static final int DATE_DIALOG_ID=0x00000000;
>
> > �...@override
> > public void onCreate(Bundle savedInstanceState) {
> > super.onCreate(savedInstanceState);
> > setContentView(R.layout.main);
>
> > //capture our View elements
> > mDateDisplay=(TextView)findViewById(R.id.DateDisplay);
> > mPickDate=(Button)findViewById(R.id.PickDate);
>
> > //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();
>
> > //add a click listener to the button
> > mPickDate.setOnClickListener(new View.OnClickListener() {
>
> > �...@override
> > public void onClick(View v) {
> > // TODO Auto-generated method stub
> > showDialog(DATE_DIALOG_ID);
> > }
> > });
> > }
>
> > protected Dialog OnCreateDialog(int id){
> > switch(id){
> > case DATE_DIALOG_ID:
> > return new DatePickerDialog
> > (this,mDateSetListener,mYear,mMonth,mDay);
> > }
> > return null;
> > }
> > //updates the date we display in the TextView
> > private void updateDisplay()
> > {
> > mDateDisplay.setText(new StringBuilder()
> > //Month is 0 based so add 1
> > .append(mMonth+1).append("-")
> > .append(mDay).append("-")
> > .append(mYear).append(" "));
> > }
>
> > // the callback received when the user "sets" the date in the dialog
> > private DatePickerDialog.OnDateSetListener mDateSetListener =
> > new DatePickerDialog.OnDateSetListener() {
>
> > public void onDateSet(DatePicker view, int year,
> > int monthOfYear, int dayOfMonth)
> > {
> > mYear = year;
> > mMonth = monthOfYear;
> > mDay = dayOfMonth;
> > updateDisplay();
> > }
> > };
>
> > }
>
> > main.xml
>
> > <?xml version="1.0" encoding="utf-8"?>
>
> > <LinearLayout android:id="@+id/LinearLayout01"
> > android:layout_width="fill_parent" android:layout_height="fill_parent"
> > xmlns:android="http://schemas.android.com/apk/res/android";
> > android:orientation="vertical">
> > <TextView android:layout_width="wrap_content"
> > android:layout_height="wrap_content" android:id="@+id/DateDisplay"
> > android:editable="false"></TextView>
> > <Button android:layout_width="wrap_content"
> > android:layout_height="wrap_content" android:id="@+id/PickDate"
> > android:text="Change the date" android:clickable="false"></Button>
> > </LinearLayout>
>
> > I debug step by step and while debugging at the breakpoint
> > onClick,the logcat appears as below:
> > 11-04 01:15:03.152: ERROR/AndroidRuntime(809): Uncaught handler:
> > thread main exiting due to uncaught exception
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809):
> > java.lang.IllegalArgumentException: Activity#onCreateDialog did not
> > create a dialog for id 0
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.app.Activity.createDialog(Activity.java:869)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.app.Activity.showDialog(Activity.java:2408)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > HelloDatePicker.pkg.HelloDatePickerAct$2.onClick
> > (HelloDatePickerAct.java:49)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.view.View.performClick(View.java:2344)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.view.View.onTouchEvent(View.java:4133)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.widget.TextView.onTouchEvent(TextView.java:6504)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.view.View.dispatchTouchEvent(View.java:3672)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > com.android.internal.policy.impl.PhoneWindow
> > $DecorView.superDispatchTouchEvent(PhoneWindow.java:1712)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent
> > (PhoneWindow.java:1202)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.app.Activity.dispatchTouchEvent(Activity.java:1987)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > com.android.internal.policy.impl.PhoneWindow
> > $DecorView.dispatchTouchEvent(PhoneWindow.java:1696)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.view.ViewRoot.handleMessage(ViewRoot.java:1658)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.os.Handler.dispatchMessage(Handler.java:99)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.os.Looper.loop(Looper.java:123)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > android.app.ActivityThread.main(ActivityThread.java:4203)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > java.lang.reflect.Method.invokeNative(Native Method)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > java.lang.reflect.Method.invoke(Method.java:521)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run
> > (ZygoteInit.java:791)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549)
> > 11-04 01:15:03.180: ERROR/AndroidRuntime(809): at
> > dalvik.system.NativeStart.main(Native Method)
> > 11-04 01:15:03.220: ERROR/dalvikvm(809): Unable to open stack trace
> > file '/data/anr/traces.txt': Permission denied
>
> > From the logcat,I guess it is the ID problem,but I don't know how to
> > use it correctly and I can't get any help from the sdk docs,please
> > help!
>
> > I have another question about '11-04 01:15:03.220: ERROR/dalvikvm
> > (809): Unable to open stack trace file '/data/anr/traces.txt':
> > Permission denied' ,how to do with it?
>
> > 3Q!
>
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