Call Method Inside Fragment From Activity

val navFragment = supportFragmentManager.findFragmentById(R.id.fragment) 
val firstFragment = navFragment!!.childFragmentManager.primaryNavigationFragment 

val myFragment: FirstFragment = firstFragment as FirstFragment
myFragment.sample()

Chage The MpChart Default Colour In Android

In Android If Chart Designed Using MpChart You Can Change The Default Color Easily,

In Chart Color is Set using This,

ColorTemplate.COLORFUL_COLORS

Change Color:

1) Array Initialize:

int  colors[] = {Color.RED,Color.GREEN,Color.BLACK,Color.BLUE};

2) Set To Chart Color:

bardataset.setColors(colors);

Increase The Time Using CountDownTimer Android

Button button;

EditText editText;

CountDownTimer timer;
int min = 0;
int sec = 0;

button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

timer = new CountDownTimer(61000,1000) {
@Override
public void onTick(long millisUntilFinished) {

if (sec==59){
sec = 0;
min = min+1;
String text = String.format(Locale.getDefault(),"%02d min: %02d sec",min,sec);
editText.setText(text);

}else {
sec = sec+1;
String text = String.format(Locale.getDefault(),"%02d min: %02d sec",min,sec);
editText.setText(text);

}

}

@Override
public void onFinish() {

Toast.makeText(DesignActivity.this, "Timer Stopped...", Toast.LENGTH_SHORT).show();
}
};

timer.start();

}
});

Time And Date Pickers In Android

In This Example We See Get Data From Time Picker And Date Picker One by One.

TimePickerDialog timePickerDialog;
int hour1,minutes1;
int cYear,cMonth,cDay;

editText.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

Calendar getDate = Calendar.getInstance();

cDay = getDate.get(Calendar.DAY_OF_MONTH);
cMonth = getDate.get(Calendar.MONTH);
cYear = getDate.get(Calendar.YEAR);

timePickerDialog =
 new TimePickerDialog(DesignActivity.this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {

final String AM_PM ;

if (hourOfDay > 12) {
hourOfDay -= 12;
AM_PM = "pm";
} else if (hourOfDay == 0) {
hourOfDay += 12;
AM_PM = "am";
} else if (hourOfDay == 12)
AM_PM = "pm";
else                    AM_PM = "am";

hour1 = hourOfDay;
minutes1 = minute;

DatePickerDialog datePicker = 
new DatePickerDialog(DesignActivity.this, new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {

cYear = year;
cMonth = month;
cDay = dayOfMonth;

editText.setText(hour1 + ":" +minutes1 + AM_PM  + "     " + cDay + "/" + cMonth + "/" + cYear);

}
},cYear,cMonth,cDay);

datePicker.show();

}
},hour1,minutes1,false);

timePickerDialog.show();

}
});

Android Move One Activity To Another

In Android To Move One Activity To Another Activity Using Intent.

Two Types of Intent:

1) Explicit Intent.
2) Implicit Intent.

1) Explicit Intent:
                           Moving With In Your Application.

2) Implicit Intent:
                           Access Outside of Your Application.
(E.X) Access Camera,Gallery on Your Mobile.


So, We Can Use Explicit Intent To Solve This,

Intent intent = new Intent(this,SecondActivity.class);

startActivity(intent);

this --> refers to the current activity.

SecondActivity.class --> Where to You Go.

startActivity --> Start The SecondActivity From Your Current Activity.