Android Open Source - ExpertAndroid Date Picker Fragment

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License

The source code is released under:

MIT License

Java Source Code

package com.iuriio.demos.expertandroid.ch2durationcontrol;
//  w  w  w. ja  va2 s. c o  m
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.os.Bundle;
import android.view.View;
import android.widget.DatePicker;

import java.util.Calendar;

public class DatePickerFragment extends DialogFragment
        implements DatePickerDialog.OnDateSetListener {
    private DurationControl parent;
    private int buttonId;

    /**
     * Initializes a new instance of the DatePickerFragment.
     *
     * @param parent   Parent control instance.
     * @param buttonId Target button Id.
     */
    public DatePickerFragment(DurationControl parent, int buttonId) {
        this.parent = parent;
        this.buttonId = buttonId;

        Bundle argsBundle = this.getArguments();
        if (argsBundle == null) {
            argsBundle = new Bundle();
        }

        argsBundle.putInt("parentid", this.parent.getId());
        argsBundle.putInt("buttonid", this.buttonId);
        this.setArguments(argsBundle);
    }

    /**
     * Initializes a new instance of the DatePickerFragment.
     */
    public DatePickerFragment() {
        // Default constructor for device rotation.
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final Calendar calendar = Calendar.getInstance();
        final int year = calendar.get(Calendar.YEAR);
        final int month = calendar.get(Calendar.MONTH);
        final int day = calendar.get(Calendar.DAY_OF_MONTH);
        return new DatePickerDialog(this.getActivity(), this, year, month, day);
    }

    @Override
    public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
        this.parent.onDateSet(this.buttonId, year, monthOfYear, dayOfMonth);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        this.establishParent();
    }

    @SuppressWarnings("ConstantConditions")
    private void establishParent() {
        if (this.parent != null) {
            return;
        }

        int parentId = this.getArguments().getInt("parentid");
        int buttonId = this.getArguments().getInt("buttonid");

        View view = this.getActivity().findViewById(parentId);
        if (view == null) {
            throw new RuntimeException("Cant establish parent on restart");
        }

        this.parent = (DurationControl) view;
        this.buttonId = buttonId;
    }
}

Java Source Code List

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