Я работаю над приложением, в котором у меня есть два средства выбора даты. Как я могу рассчитать количество дней между датами, выбранными этими сборщиками дат? Есть ли для этого библиотека или встроенная функция?
Ниже мой код:
public class ApplyLeave extends AppCompatActivity {
private static final String tag = "ApplyLeave";
private TextView fomDate;
private TextView ToDate, days_count;
private EditText reason;
private Button save_btn, apply_btn, select_recepeints;
private TextView leave_type;
private DatePickerDialog.OnDateSetListener fromdatelistener;
private DatePickerDialog.OnDateSetListener todatelistener;
String date1, date2;
int day1, day2;
Spinner spinner;
ArrayAdapter<CharSequence> adapter;
ListView lv;
@RequiresApi(api = Build.VERSION_CODES.N)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_apply_leave);
reason=(EditText)findViewById(R.id.reason);
fomDate=(TextView)findViewById(R.id.from_date);
days_count=(TextView)findViewById(R.id.Days_count);
ToDate=(TextView)findViewById(R.id.to_date);
leave_type=(TextView)findViewById(R.id.leave_type);
save_btn=(Button)findViewById(R.id.save_button);
apply_btn=(Button)findViewById(R.id.apply_button);
select_recepeints=(Button)findViewById(R.id.edit_rec);
lv = (ListView)findViewById(R.id.result);
final FragmentManager fm=getFragmentManager();
final edit_recepients er=new edit_recepients();
select_recepeints.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
er.show(fm,"TV_tag");
}
});
SharedPreferences sharedPreferences =getSharedPreferences("MyData",MODE_PRIVATE);
String leave_typ= sharedPreferences.getString("leave_type","null");
String formdate= sharedPreferences.getString("fromDate","null");
String toDate= sharedPreferences.getString("ToDate","null");
String reson= sharedPreferences.getString("reason","null");
String recepienst= sharedPreferences.getString("recepients","null");
if(leave_typ.equals("null") || formdate.equals("null") || toDate.equals("null") || reson.equals("null"))
{
Toast.makeText(getApplicationContext(), "not data found",Toast.LENGTH_SHORT).show();
}
else {
leave_type.setText(leave_typ);
fomDate.setText(formdate);
ToDate.setText(toDate);
reason.setText(reson);
}
save_btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SharedPreferences sharedPreferences=getApplicationContext().getSharedPreferences("MyData",MODE_PRIVATE);
SharedPreferences.Editor editor=sharedPreferences.edit();
editor.putString("leave_type",leave_type.getText().toString());
editor.putString("fromDate",fomDate.getText().toString());
editor.putString("ToDate",ToDate.getText().toString());
editor.putString("reason",reason.getText().toString());
editor.putString("recepients",lv.getAdapter().toString());
editor.commit();
Toast.makeText(getApplicationContext(),"Application saved",Toast.LENGTH_SHORT).show();
}
});
//spinner for leave
spinner=(Spinner)findViewById(R.id.leaves);
adapter=ArrayAdapter.createFromResource(this,R.array.leave_type,R.layout.spinner_layout);
adapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
//get data from dashboard activity and set into spineer
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
if(getIntent().getExtras()!=null) {
int select = getIntent().getExtras().getInt("leave");
spinner.setSelection(select);
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
//listview to display selected persons on Apply leave Acitivity from the onclick event on setttings activiy.
if(getIntent().getExtras()!=null) {
Bundle b = getIntent().getExtras();
String[] resultArr = b.getStringArray("selectedItems");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
R.layout.spinner_layout, resultArr);
lv.setAdapter(adapter);
}
//
// Back button in toolbar
Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
toolbar.setTitleTextColor(getResources().getColor(R.color.o2htextOne));
getSupportActionBar().setDisplayShowTitleEnabled(false);
final Drawable upArrow = getResources().getDrawable(R.drawable.back_arrow);
upArrow.setColorFilter(getResources().getColor(R.color.o2htextOne), PorterDuff.Mode.SRC_ATOP);
getSupportActionBar().setHomeAsUpIndicator(upArrow);
if(getSupportActionBar()!=null)
{
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}//
fomDate.setOnClickListener(new View.OnClickListener() {
@RequiresApi(api = Build.VERSION_CODES.N)
@Override
public void onClick(View v) {
Calendar calendar= Calendar.getInstance();
int year=calendar.get(Calendar.YEAR);
int month=calendar.get(Calendar.MONTH);
int day=calendar.get(Calendar.DAY_OF_MONTH);
day1=calendar.get(Calendar.DAY_OF_YEAR);
DatePickerDialog datePickerDialog=new DatePickerDialog(ApplyLeave.this,
R.style.DatePickerDialogTheme,
fromdatelistener,year,month,day);
datePickerDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.WHITE));
datePickerDialog.show();
}
});
fromdatelistener= new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
month=month+1;
Log.d("tag","setDate: "+year+ "/"+month+"/"+dayOfMonth+"");
date1 =+year+ "/"+month+"/"+dayOfMonth+"";
fomDate.setText(date1);
}
};
ToDate.setOnClickListener(new View.OnClickListener() {
@RequiresApi(api = Build.VERSION_CODES.N)
@Override
public void onClick(View v) {
Calendar calendar= Calendar.getInstance();
int year=calendar.get(Calendar.YEAR);
int month=calendar.get(Calendar.MONTH);
int day=calendar.get(Calendar.DAY_OF_MONTH);
day2=calendar.get(Calendar.DAY_OF_YEAR);
DatePickerDialog datePickerDialog=new DatePickerDialog(ApplyLeave.this,
R.style.DatePickerDialogTheme,
todatelistener,year,month,day);
datePickerDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.WHITE));
datePickerDialog.show();
}
});
todatelistener= new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
month=month+1;
Log.d("tag","setDate: "+year+ "/"+month+"/"+dayOfMonth+"");
date2 =+year+ "/"+month+"/"+dayOfMonth+"";
ToDate.setText(date2);
}
};
}
@Override
public void onBackPressed() {
Intent intent = new Intent(getApplicationContext(), Main3Activity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId()==android.R.id.home)
{
finish();
}
return super.onOptionsItemSelected(item);
}
}
