編輯文本的日期和時間驗證錯誤在android中

Question

你好，我已經在android中給日期和時間驗證，但是當我不選擇日期時，它會顯示錯誤消息，但是從datepicker中選擇日期後，它再次顯示錯誤如何解決這裏是我的代碼

public class ProfileDetail extends AppCompatActivity implements DatePickerDialog.OnDateSetListener { 
    Toolbar toolbar; 
    String description, str_requirement, str_date, str_time, str_noofperson, str_address; 
    TextView txt_description; 
    EditText et_requirment, date_pick, time_set, et_no_of_person, et_address_service; 
    Calendar calendar; 
    DatePickerDialog datePickerDialog; 
    int Year, Month, Day; 
    Button btn_submit; 

    @RequiresApi(api = Build.VERSION_CODES.N) 
    @Override 
    protected void onCreate(@Nullable Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.profile_details); 
     Bundle extras = getIntent().getExtras(); 
     description = extras.getString("description"); 
     txt_description = (TextView) findViewById(R.id.txtservicedetails); 
     toolbar = (Toolbar) findViewById(R.id.toolbarforprofile); 
     setSupportActionBar(toolbar); 
     et_requirment = (EditText) findViewById(R.id.editText_requirement); 
     et_no_of_person = (EditText) findViewById(R.id.et_noofperson); 
     et_address_service = (EditText) findViewById(R.id.et_serviceaddress); 
     date_pick = (EditText) findViewById(R.id.et_dateof_visit); 
     time_set = (EditText) findViewById(R.id.et_time); 

     btn_submit = (Button) findViewById(R.id.btn_submit); 
     calendar = Calendar.getInstance(); 
     Year = calendar.get(Calendar.YEAR); 
     Month = calendar.get(Calendar.MONTH); 
     Day = calendar.get(Calendar.DAY_OF_MONTH); 
     getSupportActionBar().setDisplayHomeAsUpEnabled(true); 
     getSupportActionBar().setDisplayShowHomeEnabled(true); 
     toolbar.setTitle("Need-Hlp"); 
     txt_description.setText(description); 
     //date_pick.setInputType(InputType.TYPE_NULL); 
     toolbar.setNavigationOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent intentfromprevious = new Intent(ProfileDetail.this, NavigationDrawer.class); 
       intentfromprevious.putExtra("description", description); 
       intentfromprevious.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
       intentfromprevious.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK); 
       intentfromprevious.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION); 
       startActivity(intentfromprevious); 

      } 
     }); 



     date_pick.setOnClickListener(new View.OnClickListener() { 
      @RequiresApi(api = Build.VERSION_CODES.N) 
      @Override 
      public void onClick(View v) { 

       datePickerDialog = DatePickerDialog.newInstance(ProfileDetail.this, Year, Month, Day); 

       datePickerDialog.setThemeDark(false); 

       datePickerDialog.showYearPickerFirst(false); 

       datePickerDialog.setAccentColor(Color.parseColor("#009688")); 

       datePickerDialog.setTitle("Select Date From DatePickerDialog"); 

       datePickerDialog.show(getFragmentManager(), "DatePickerDialog"); 


      } 
     }); 
     time_set.setOnClickListener(new View.OnClickListener() { 
      @RequiresApi(api = Build.VERSION_CODES.N) 
      @Override 
      public void onClick(View v) { 
       Calendar mcurrentTime = Calendar.getInstance(); 
       int hour = mcurrentTime.get(Calendar.HOUR_OF_DAY); 
       int minute = mcurrentTime.get(Calendar.MINUTE); 

       TimePickerDialog mTimePicker; 
       mTimePicker = new TimePickerDialog(ProfileDetail.this, new TimePickerDialog.OnTimeSetListener() { 
        @Override 
        public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) { 
         time_set.setText(selectedHour + ":" + selectedMinute); 
        } 
       }, hour, minute, true); 
       mTimePicker.setTitle("Select Time"); 
       mTimePicker.show(); 

      } 
     }); 


     //////Submit button onclicklistener 
     btn_submit.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (et_requirment.getText().toString().equals("")) { 
        et_requirment.setError("Requirement cannot be blank"); 
        et_requirment.requestFocus(); 
        return; 
       } 
       if (date_pick.getText().toString().equals("")) { 
        date_pick.setError("Date cannot be blank"); 

        //date_pick.requestFocus(); 
        return; 
       } 

       if (time_set.getText().toString().equals("")) { 
        time_set.setError("Time cannot be blank"); 
        //edittext_phone.requestFocus(); 
        return; 
       } 

       if (et_no_of_person.getText().toString().toString().equals("")) { 
        et_no_of_person.setError("No of person cannot be blank"); 
        //edittext_phone.requestFocus(); 
        return; 
       } 
       if (et_address_service.getText().toString().equals("")) { 
        et_address_service.setError("Address cannot be blank"); 
        //edittext_Password.requestFocus(); 
        return; 
       } 


       if (!et_requirment.getText().toString().trim().equals("") && !date_pick.getText().toString().equals("") && 
         time_set.getText().toString().trim().equals("") && 
         et_no_of_person.getText().toString().trim().equals("") && 
         !et_address_service.getText().toString().equals("")) { 
        Toast.makeText(ProfileDetail.this, "You Request Submitted", Toast.LENGTH_SHORT).show(); 
        Intent intentforlist = new Intent(ProfileDetail.this, NavigationDrawer.class); 
        intentforlist.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
        intentforlist.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK); 
        intentforlist.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION); 
        startActivity(intentforlist); 
       } 

      } 
     }); 
    } 

Here Is MY XML: 

       <LinearLayout 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_marginLeft="-45.5dp" 
        android:layout_marginRight="16dp" 
        android:layout_marginTop="32dp"> 


        <LinearLayout 
         android:id="@+id/profile_details" 
         android:layout_width="match_parent" 
         android:layout_height="wrap_content" 
         android:orientation="vertical"> 

         <LinearLayout 
          android:layout_width="match_parent" 
          android:layout_height="wrap_content" 
          android:background="@color/demo" 

          android:orientation="vertical" 
          android:padding="16dp"> 

          <TextView 
           android:id="@+id/txtservicedetails" 
           android:layout_width="match_parent" 
           android:layout_height="wrap_content" 
           android:layout_gravity="center" 
           android:layout_marginBottom="20dp" 
           android:layout_marginTop="40dp" 
           android:gravity="center" 
           android:text="@string/app_name" 
           android:textColor="#fff" 
           android:textSize="20sp" 
           android:textStyle="bold" /> 

          <EditText 
           android:id="@+id/editText_requirement" 
           android:layout_width="match_parent" 
           android:layout_height="70dp" 
           android:layout_margin="3dp" 
           android:background="#fff" 
           android:digits="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890" 
           android:gravity="top" 
           android:hint="Your Requirement" 
           android:inputType="textMultiLine|textCapSentences" 
           android:padding="6dp" 
           android:textColor="#000" /> 

          <EditText 
           android:id="@+id/et_dateof_visit" 
           android:layout_width="match_parent" 
           android:layout_height="40dp" 
           android:layout_margin="5dp" 
           android:background="#fff" 

           android:hint="Date Of Visit" 
           android:inputType="date" 
           android:maxLines="1" 
           android:padding="5dp" 
           android:textColor="#000" /> 

          <EditText 
           android:id="@+id/et_time" 
           android:layout_width="match_parent" 
           android:layout_height="40dp" 
           android:layout_margin="5dp" 
           android:background="#fff" 

           android:hint="Time Of Visit" 
           android:inputType="time" 
           android:maxLines="1" 
           android:padding="5dp" 
           android:textColor="#000" /> 

          <EditText 

           android:id="@+id/et_noofperson" 
           android:layout_width="match_parent" 
           android:layout_height="40dp" 
           android:layout_margin="5dp" 
           android:background="#fff" 
           android:focusable="true" 
           android:hint="No Of Person You Need" 
           android:inputType="number" 
           android:maxLength="2" 
           android:maxLines="1" 
           android:padding="5dp" 
           android:singleLine="true" 
           android:text="" /> 

          <EditText 

           android:id="@+id/et_serviceaddress" 
           android:layout_width="match_parent" 
           android:layout_height="70dp" 
           android:layout_margin="5dp" 
           android:background="#fff" 
           android:digits="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890/-,:" 
           android:focusable="true" 
           android:gravity="top" 
           android:hint="Service Address" 
           android:inputType="textMultiLine|textCapSentences" 
           android:maxLines="4" 
           android:padding="10dp" 
           android:singleLine="true" 
           android:text="" /> 


         </LinearLayout> 

         <RelativeLayout 
          android:layout_width="match_parent" 
          android:layout_height="wrap_content" 
          android:layout_gravity="center" 
          android:layout_marginBottom="20dp" 
          android:layout_marginTop="-20dp" 
          android:gravity="center"> 

          <Button 
           android:id="@+id/btn_submit" 
           style="@style/Widget.AppCompat.Button.Colored" 
           android:layout_width="wrap_content" 
           android:layout_height="40dp" 
           android:background="@drawable/rounded_green" 
           android:text="Submit" 
           android:textStyle="bold" /> 

Answer 1

添加此您日期點擊希望它會爲你

final Calendar myCalendar = Calendar.getInstance(); 
      DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() { 
       @Override 
       public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) { 
        // TODO Auto-generated method stub 
        myCalendar.set(Calendar.YEAR, year); 
        myCalendar.set(Calendar.MONTH, monthOfYear); 
        myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth); 
        String myFormat = "yyyy-MM-dd"; // your format 
        SimpleDateFormat sdf = new SimpleDateFormat(myFormat, Locale.getDefault()); 

        date_pick.setText(sdf.format(myCalendar.getTime())); 
       } 

      }; 
      new DatePickerDialog(this, date, myCalendar.get(Calendar.YEAR), myCalendar.get(Calendar.MONTH), myCalendar.get(Calendar.DAY_OF_MONTH)).show();