在主要页面复制选定的日期从DatePickerDialog到EDITTEXT箱 [英] Copy selected date from DatePickerDialog to Edittext box in main page

问题描述

我下面此链接创建DatePickerDialog和选定日期复制到Editext场。然而，我无法管理，以了解如何做到这一点，因为无论我在onDateSet方法做​​，这是面目全非。如果有人好心帮。

主要XML：

 ＆LT;的EditText
                机器人：ID =@ + ID / add_datepurchased
                安卓的inputType =日期
                安卓的onClick =showdate相​​似/＆GT;
 

主类：

 的EditText datpurchased;
    @覆盖
    保护无效的onCreate（捆绑savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.activity_add_entry）;
        //显示操作栏中的向上按钮。
        setupActionBar（）;        datpurchased =（EditText上）findViewById（R.id.add_datepurchased）;
    }
公共无效showdate相​​似（视图v）{
        DialogFragment newFragment =新DatePickerFragment（）;
        newFragment.show（getFragmentManager（），日期选择器）;
    }
 

DatePickerFragment类：

 公共类DatePickerFragment扩展DialogFragment实现DatePickerDialog.OnDateSetListener {    @覆盖
    公共对话框onCreateDialog（捆绑savedInstanceState）{
        最后的日历C = Calendar.getInstance（）;
        年整型= c.get（Calendar.YEAR）;
        INT月= c.get（的Calendar.MONTH）;
        INT天= c.get（Calendar.DAY_OF_MONTH）;
        返回新DatePickerDialog（getActivity（），这，年，月，日）;
    }    公共无效onDateSet（查看的DatePicker，年整型，诠释月，日整型）{
        的EditText datpurchased =（EditText上）findViewById（R.id.add_datepurchased）; //提示错误
        datpurchased.setText（年+ - +（月+ 1）+ - +天）;
    }
}
 

解决方案

您应该intialize的EditText中的onCreate（）

I am following this link to create a DatePickerDialog and copy the selected date to an Editext field. However, I could not manage to understand how to do that, as whatever I do in onDateSet method, it is unrecognizable. If anybody kindly help.

MAIN XML:

<EditText
                android:id="@+id/add_datepurchased"
                android:inputType="date"
                android:onClick="showdate" />

Main Class:

EditText datpurchased;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_entry);
        // Show the Up button in the action bar.
        setupActionBar();

        datpurchased = (EditText) findViewById(R.id.add_datepurchased);
    }
public void showdate(View v) {
        DialogFragment newFragment = new DatePickerFragment();
        newFragment.show(getFragmentManager(), "datePicker");
    }

DatePickerFragment Class:

public class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState){
        final Calendar c=Calendar.getInstance();
        int year=c.get(Calendar.YEAR);
        int month=c.get(Calendar.MONTH);
        int day=c.get(Calendar.DAY_OF_MONTH);
        return new DatePickerDialog(getActivity(), this, year, month, day);
    }

    public void onDateSet(DatePicker view, int year, int month, int day){
        EditText datpurchased = (EditText) findViewById(R.id.add_datepurchased); // GIVES ERROR
        datpurchased.setText(year+"-"+(month+1)+"-"+day);
    }
}

解决方案

You should intialize EditText in onCreate()

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