How to get 30 min interval in time picker in Android N

Question

I want to get 30 min interval from time picker dialog and below code works proper below Android N but not working in latest device. Below is my code for activity.

    public class MainActivity extends AppCompatActivity {

    private TextView tvSelectedTime;
    private Button btnOpentimePickerDialog;
    private int intHour, intMinute;
    private String strMin = "";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        getIds();
        setListner();
    }

    private void setListner() {
        try {
            btnOpentimePickerDialog.setOnClickListener(onClickListener);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    View.OnClickListener onClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            try {
                switch (view.getId()){
                    case R.id.btnOpentimePickerDialog:
                        openTimePicker();
                        break;
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    };

    private void openTimePicker() {
        CustomTimePickerDialog timePickerDialog = new CustomTimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() {
            @SuppressLint("NewApi")
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                        Log.e("Log", "selected time----" + hourOfDay + ":" + minute);
                        String strTime = hourOfDay + ":"+ minute + ":00";

                updateTime(hourOfDay, minute);
            }
        }, intHour, intMinute, false);
        timePickerDialog.show();

    }

    private void updateTime(int hours, int mins) {
        String timeSet = "";
        if (hours > 12) {
            hours -= 12;
            timeSet = "PM";
        } else if (hours == 0) {
            hours += 12;
            timeSet = "AM";
        } else if (hours == 12)
            timeSet = "PM";
        else
            timeSet = "AM";
//TODO=================Adding zero in one dightleft  and right======================
        if (mins < 10)
            strMin = "0" + mins;
        else
            strMin = String.valueOf(mins);
        // Append in a StringBuilder
        String aTime = new StringBuilder().append(pad(hours)).append(':')
                .append(pad(Integer.parseInt(strMin))).append(" ").append(timeSet).toString();

        Log.e("aTime checking ==>",""+aTime);

        tvSelectedTime.setText(aTime);
    }


    private void getIds() {
        try {
            btnOpentimePickerDialog = findViewById(R.id.btnOpentimePickerDialog);
            tvSelectedTime = findViewById(R.id.tvSelectedTime);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private String pad(int c) {
        if (c >= 10)
            return String.valueOf(c);
        else
            return "0" + String.valueOf(c);
    }

}

and below is my custom time picker dialog code.

    public class CustomTimePickerDialog  extends TimePickerDialog {

    private final static int TIME_PICKER_INTERVAL = 30;
    private TimePicker mTimePicker;
    private final OnTimeSetListener mTimeSetListener;

    public CustomTimePickerDialog(Context context, OnTimeSetListener listener, int hourOfDay, int minute, boolean is24HourView) {
        super(context, TimePickerDialog.THEME_HOLO_LIGHT, null, hourOfDay,
                minute / TIME_PICKER_INTERVAL, is24HourView);
        mTimeSetListener = listener;
    }

    @Override
    public void updateTime(int hourOfDay, int minuteOfHour) {
        mTimePicker.setCurrentHour(hourOfDay);
        mTimePicker.setCurrentMinute(minuteOfHour / TIME_PICKER_INTERVAL);
    }

    @Override
    public void onClick(DialogInterface dialog, int which) {
        switch (which) {
            case BUTTON_POSITIVE:
                if (mTimeSetListener != null) {
                    mTimeSetListener.onTimeSet(mTimePicker, mTimePicker.getCurrentHour(),
                            mTimePicker.getCurrentMinute() * TIME_PICKER_INTERVAL);
                }
                break;
            case BUTTON_NEGATIVE:
                cancel();
                break;
        }
    }

    @Override
    public void onAttachedToWindow() {
        super.onAttachedToWindow();
        try {
            Class<?> classForid = Class.forName("com.android.internal.R$id");
            Field timePickerField = classForid.getField("timePicker");
            mTimePicker = (TimePicker) findViewById(timePickerField.getInt(null));
            Field field = classForid.getField("minute");

            NumberPicker minuteSpinner = (NumberPicker) mTimePicker
                    .findViewById(field.getInt(null));
            minuteSpinner.setMinValue(0);
            minuteSpinner.setMaxValue((60 / TIME_PICKER_INTERVAL) - 1);
            List<String> displayedValues = new ArrayList<>();
            for (int i = 0; i < 60; i += TIME_PICKER_INTERVAL) {
                displayedValues.add(String.format("%02d", i));
            }
            minuteSpinner.setDisplayedValues(displayedValues
                    .toArray(new String[displayedValues.size()]));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

In some device, above code is working fine and here is that screenshot.

and in some device I am not able to get time by 30 min interval like below.

Actually I want to implement time picker like first screen which support in all device.

Answer 1

I have resolved my issue using this library and here is my complete code which may help someone in the future.

My complete code is in below.

public class MainActivity extends AppCompatActivity implements TimePickerDialog.OnTimeSetListener {

    private TextView timeTextView;
    private TimePickerDialog timePickerDialog;
    private Button timeButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Find our View instances
        timeTextView = findViewById(R.id.time_textview);
        timeButton = findViewById(R.id.time_button);

        // Show a timepicker when the timeButton is clicked
        timeButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Calendar now = Calendar.getInstance();

                timePickerDialog = TimePickerDialog.newInstance(
                        MainActivity.this,
                        now.get(Calendar.HOUR_OF_DAY),
                        now.get(Calendar.MINUTE),
                        false
                );

                timePickerDialog.setThemeDark(false);
                timePickerDialog.setTitle("TimePicker Title");
                timePickerDialog.setTimeInterval(1, 30, 60);                            
                timePickerDialog.setAccentColor(Color.parseColor("#9C27B0"));

                timePickerDialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
                    @Override
                    public void onCancel(DialogInterface dialogInterface) 
                        Log.d("TimePicker", "Dialog was cancelled");
                    }
                });
                timePickerDialog.show(getFragmentManager(), "Timepickerdialog");
            }
        });
    }

    @Override
    public void onTimeSet(TimePickerDialog view, int hourOfDay, int minute, int second) {
        updateEndTime(hourOfDay,minute);
    }

    private void updateEndTime(int hours, int mins) {
        String timeSet = "";
        if (hours > 12) {
            hours -= 12;
            timeSet = "PM";
        } else if (hours == 0) {
            hours += 12;
            timeSet = "AM";
        } else if (hours == 12) {
            timeSet = "PM";
        } else {
            timeSet = "AM";
        }

        // Append in a StringBuilder
        String aTime = new StringBuilder().append(pad(hours)).append(':')
                .append(pad(mins)).append(" ").append(timeSet).toString();

        timeTextView.setText(aTime);
    }

    private static String pad(int c) {
        if (c >= 10)
            return String.valueOf(c);
        else
            return "0" + String.valueOf(c);
    }

    @Override
    public void onResume() {
        super.onResume();
        TimePickerDialog tpd = (TimePickerDialog) getFragmentManager().findFragmentByTag("Timepickerdialog");
        if (tpd != null) tpd.setOnTimeSetListener(this);
    }
}

My desire output is like this: