我正在构建一个应用程序,您可以在其中选择DatePickerDialog的日期,在您选择并点按"确定"后,您选择的日期必须显示在TextView中。
我遇到了这样的问题,因为我不能使用" setText.mTexView(foo)"在DialogFragment中...我已经尝试通过构造函数传递textview或者在片段中获取电视但是我无法帮助。
这是我的代码:
public class PickDate_main extends AppCompatActivity {
EditText tv_fecha;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.pickdate_main);
}
public void showDatePickerDialog(View v){//This method is executed from the layout with a button
PickDate_Dialog dialog = new PickDate_Dialog();
FragmentTransaction ft = getFragmentManager().beginTransaction();
dialog.show(ft, "Date pickeerr");
}
}
-
public class PickDate_Dialog extends DialogFragment implements DatePickerDialog.OnDateSetListener{
public PickDate_Dialog(){
}
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 PickDate_Dialog(getActivity(),this,year,month,day);
}
@Override
public void onDateSet(DatePicker view, int year, int month, int day) {
String date = day + "-"+(month+1)+"-"+year;
//I want to write the string "data", i suppose it must be here
}
}
答案 0 :(得分:0)
我相信如果您将textview发送到PickDate_Dialog,保存并在必要时调用它,它应该可以工作。但不确定return new PickDate_Dialog(getActivity(),this,year,month,day);
。
public class PickDate_Dialog extends DialogFragment implements DatePickerDialog.OnDateSetListener{
private EditText dateEditText;
public PickDate_Dialog(EditText et){
dateEditText = et;
}
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);
//Do you have a constructor for this? This is likely your issue
return new PickDate_Dialog(getActivity(),this,year,month,day);
}
@Override
public void onDateSet(DatePicker view, int year, int month, int day) {
String date = day + "-"+(month+1)+"-"+year;
if (dateEditText != null)
dateEditText.setText(date);
}
}
但是,这里有一些想法:
选项1:查看界面。这是一种允许您在类之间发送回调的方法(DatePickerDialog.OnDateSetListener就是一个例子)。在Dialog类中创建一个新接口
public interface PickDateInterface {
void onDateSet(String date)
}
为它创建一个变量
私人PickDateInterface mPDInterface;
并将其添加到原始的onDateSet
@Override
public void onDateSet(DatePicker view, int year, int month, int day) {
String date = day + "-"+(month+1)+"-"+year;
if (mPDInterface != null) {
mPDInterface.onDateSet(date);
}
}
当您创建对话框时,只需将此界面添加为参数,并在界面中添加您需要执行的操作。
选项2:
在您的活动中创建一个公共方法并通过它调用它
(([你的活动名称])[你的背景])。你的方法;
您基本上是将您的上下文投射到您的活动并使用该方法
例:
((PickDate_main).getContext()).setDateText(date);