android.support.test.testapp.PickersActivity.java Source code

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Here is the source code for android.support.test.testapp.PickersActivity.java

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/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.support.test.testapp;

import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.app.TimePickerDialog.OnTimeSetListener;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentActivity;
import android.text.TextUtils;
import android.text.format.Time;
import android.view.View;
import android.widget.DatePicker;
import android.widget.TextView;
import android.widget.TimePicker;

import java.text.SimpleDateFormat;
import java.util.Calendar;

/**
 * An activity that let's you pick a date {@link DatePicker} and time {@link TimePicker} and
 * displays it in the UI.
 */
public class PickersActivity extends FragmentActivity {

    private TextView pickedDateTextView;
    private TextView pickedTimeTextView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.pickers_activity);
        pickedDateTextView = (TextView) findViewById(R.id.text_view_picked_date);
        pickedTimeTextView = (TextView) findViewById(R.id.text_view_picked_time);
    }

    /**
     * Updates the Activity's UI and displays the picked date.
     */
    public void updateDateText(String date) {
        updateTextInUi(date, pickedDateTextView);
    }

    /**
     * Updates the Activity's UI and displays the picked time.
     */
    public void updateTimeText(String time) {
        updateTextInUi(time, pickedTimeTextView);
    }

    public void showDatePicker(View view) {
        showPickerUi(new DatePickerfragment(), DatePickerfragment.TAG);
    }

    public void showTimePicker(View view) {
        showPickerUi(new TimePickerfragment(), DatePickerfragment.TAG);
    }

    private void updateTextInUi(String text, TextView textView) {
        if (null == textView) {
            return;
        }

        if (View.INVISIBLE == textView.getVisibility()) {
            textView.setVisibility(View.VISIBLE);
        }

        textView.setText(text);
    }

    private void showPickerUi(DialogFragment fragment, String tag) {
        if (null == fragment && TextUtils.isEmpty(tag)) {
            return;
        }

        fragment.show(getSupportFragmentManager(), tag);
    }

    /**
     * A Fragment shows hosts a {@link DatePickerDialog} to pick a date.
     */
    public static class DatePickerfragment extends DialogFragment implements OnDateSetListener {

        public static final String TAG = DatePickerfragment.class.getSimpleName();

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {

            final Calendar calendar = Calendar.getInstance();
            final int year = calendar.get(Calendar.YEAR);
            final int monthOfYear = calendar.get(Calendar.MONTH);
            final int dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);

            return new DatePickerDialog(getActivity(), this, year, monthOfYear, dayOfMonth);
        }

        @Override
        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
            final String dateString = PickerHelper.dateToString(year, monthOfYear, dayOfMonth);
            ((PickersActivity) getActivity()).updateDateText(dateString);
        }

    }

    /**
     * A Fragment which shows a {@link TimePickerDialog} to pick a date.
     */
    public static class TimePickerfragment extends DialogFragment implements OnTimeSetListener {

        public static final String TAG = TimePickerfragment.class.getSimpleName();

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {

            final Calendar calendar = Calendar.getInstance();
            final int hourOfDay = calendar.get(Calendar.HOUR);
            final int minuteOfHour = calendar.get(Calendar.MINUTE);

            return new TimePickerDialog(getActivity(), this, hourOfDay, minuteOfHour, false);
        }

        @Override
        public void onTimeSet(TimePicker view, int hourOfDay, int minuteOfHour) {
            final String timeString = PickerHelper.timeToString(hourOfDay, minuteOfHour);
            ((PickersActivity) getActivity()).updateTimeText(timeString);
        }
    }

    /**
     * Helper class for conversion of date and time into an human readable string.
     */
    public static class PickerHelper {

        private static final SimpleDateFormat DATE_FORMAT_MMDDyyyy = new SimpleDateFormat("MM/dd/yyyy");
        private static final String TIME_FORMAT_HM = "%H:%M";

        private PickerHelper() {
            // no instance
        }

        /**
         * Converts a set date to an formatted {@link String}
         */
        public static String dateToString(int year, int monthOfYear, int dayOfMonth) {
            final Calendar calendar = Calendar.getInstance();
            calendar.set(year, monthOfYear, dayOfMonth);
            return DATE_FORMAT_MMDDyyyy.format(calendar.getTime());
        }

        /**
         * Converts a set time to an formatted {@link String}
         */
        public static String timeToString(int hourOfDay, int minuteOfHour) {
            final Time time = new Time();
            time.set(0, minuteOfHour, hourOfDay, 0, 0, 0);
            return time.format(TIME_FORMAT_HM);
        }

    }
}