我有很多edittext来显示DatePickerDialog,所以我使用方法和edittext作为参数。然后Java说,从内部类访问参数应该是最终的。edittext声明为final,settext不起作用
但是,当我运行应用程序,它停在edittext.settext()我怀疑edittext作为最终的问题,因为我有另一个代码,不会使edittext作为参数运行良好。
这是代码:
public DatePickerDialog setDateTanggalBeri(final EditText editTanggal){
DatePickerDialog datePickTgl;
Calendar newCalendar = Calendar.getInstance();
datePickTgl = new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener() {
@RequiresApi(api = Build.VERSION_CODES.N)
@Override
public void onDateSet(DatePicker datePicker, int i, int i1, int i2) {
final Calendar newDate = Calendar.getInstance();
newDate.set(i,i1,i2);
editTanggal.setText(dateFormatter.format(newDate.getTime()));
}
},newCalendar.get(Calendar.YEAR),newCalendar.get(Calendar.MONTH),newCalendar.get(Calendar.DAY_OF_MONTH));
return datePickTgl;
}
,这里是错误:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.droid.anindya.jadwalimunisasibayiku, PID: 5669
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.EditText.setText(java.lang.CharSequence)' on a null object reference
at com.droid.anindya.jadwalimunisasibayiku.Display_Jadwal$1.onDateSet(Display_Jadwal.java:209)
at android.app.DatePickerDialog.onClick(DatePickerDialog.java:137)
at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:163)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
,这是怎么实现的:
的onCreate外状态:
DatePickerDialog DPD1;
DatePickerDialog DPD2;
DatePickerDialog DPD3;
DatePickerDialog DPD4;
DatePickerDialog DPD5;
状态我n面的onCreate:
DPD1 = setDateTanggalBeri(textTgl1);
DPD2 = setDateTanggalBeri(textTgl2);
DPD3 = setDateTanggalBeri(textTgl3);
DPD4 = setDateTanggalBeri(textTgl4);
DPD5 = setDateTanggalBeri(textTgl5);
....
EDITTEXT上点击:
public void tanggalBeri1Clicked(View view) {
DPD1.show();
}
public void tanggalBeri2Clicked(View view) {
DPD2.show();
}
....
你的函数'setDateTanggalBeri()'是在同一活动或你的EditText初始化片段? –
是的,它是在同一个活动。我将EditText初始化放在另一个方法中,并在onCreate中调用它。 –
你能否包含错误信息? –