Saturday, June 6, 2015

// //

Display the current system date in android

Display the system date in android main.xml



    

MyAndroidAppActivity.java
import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;

public class MyAndroidAppActivity extends Activity {

 private TextView tvDisplayDate;
 private DatePicker dpResult;
 private Button btnChangeDate;

 private int year;
 private int month;
 private int day;
 String thursday, monday, tuesday;

 static final int DATE_DIALOG_ID = 999;

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

  setCurrentDateOnView();
  addListenerOnButton();
  
  

 }

 // display current date
 public void setCurrentDateOnView() {

  tvDisplayDate = (TextView) findViewById(R.id.tvDate);
  dpResult = (DatePicker) findViewById(R.id.dpResult);
   thursday = ("Th"); 
  
  final Calendar c = Calendar.getInstance();
  year = c.get(Calendar.YEAR);
  month = c.get(Calendar.MONTH);
  day = c.get(Calendar.DAY_OF_MONTH);
 
  // set current date into textview
  tvDisplayDate.setText(new StringBuilder()
    // Month is 0 based, just add 1
    .append(month + 1).append("-").append(day).append("-")
    .append(year).append("   Today is :" + thursday ) );

  // set current date into datepicker
  dpResult.init(year, month, day, null);

 }

 public void addListenerOnButton() {

  btnChangeDate = (Button) findViewById(R.id.btnChangeDate);

  btnChangeDate.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View v) {

    showDialog(DATE_DIALOG_ID);

   }

  });

 }

 @Override
 protected Dialog onCreateDialog(int id) {
  switch (id) {
  case DATE_DIALOG_ID:
   // set date picker as current date
   return new DatePickerDialog(this, datePickerListener, year, month,
     day);
  }
  return null;
 }

 private DatePickerDialog.OnDateSetListener datePickerListener = new DatePickerDialog.OnDateSetListener() {

  // when dialog box is closed, below method will be called.
  public void onDateSet(DatePicker view, int selectedYear,
    int selectedMonth, int selectedDay) {
   year = selectedYear;
   month = selectedMonth;
   day = selectedDay;

   // set selected date into textview
   tvDisplayDate.setText(new StringBuilder().append(month + 1)
     .append("-").append(day).append("-").append(year)
     .append(" "));

   // set selected date into datepicker also
   dpResult.init(year, month, day, null);

  }
 };

}