Java tutorial
/* * Calendula - An assistant for personal medication management. * Copyright (C) 2016 CITIUS - USC * * Calendula is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this software. If not, see <http://www.gnu.org/licenses/>. */ package es.usc.citius.servando.calendula.fragments.dosePickers; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.content.Context; import android.content.DialogInterface; import android.os.Bundle; import android.os.IBinder; import android.support.v4.app.DialogFragment; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.inputmethod.InputMethodManager; import es.usc.citius.servando.calendula.R; /** * Created by joseangel.pineiro on 10/7/15. */ public abstract class DosePickerFragment extends DialogFragment { OnDoseSelectedListener mDoseSelectedListener; private double initialDose = 1.0f; protected abstract int getLayoutResource(); protected abstract void setupRootView(View root); protected abstract void setInitialValue(double initialDose); protected abstract double getSelectedDose(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle args = getArguments(); initialDose = args.getDouble("dose", 1d); } @Override public void onAttach(Activity activity) { super.onAttach(activity); Log.d(getTag(), "Activity " + activity.getClass().getName() + ", " + (activity instanceof OnDoseSelectedListener)); // If the container activity has implemented // the callback interface, set it as listener if (activity instanceof OnDoseSelectedListener) { mDoseSelectedListener = (OnDoseSelectedListener) activity; } } public void setOnDoseSelectedListener(OnDoseSelectedListener l) { mDoseSelectedListener = l; } // Container Activity must implement this interface public interface OnDoseSelectedListener { void onDoseSelected(double dose); } @Override public Dialog onCreateDialog(Bundle savedInstanceState) { LayoutInflater inflater = getActivity().getLayoutInflater(); View rootView = inflater.inflate(getLayoutResource(), null); setupRootView(rootView); setInitialValue(initialDose); if (getDialog() != null) { getDialog().setTitle(R.string.title_select_dose_dialog); } return new AlertDialog.Builder(getActivity()).setView(rootView).setTitle(R.string.title_select_dose_dialog) .setPositiveButton(R.string.done, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { onDone(); if (mDoseSelectedListener != null) mDoseSelectedListener.onDoseSelected(getSelectedDose()); } }).setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { onCancel(); } }).create(); } protected void onDone() { // do nothing by default } protected void onCancel() { // do nothing by default } public static void closeKeyboard(Context c, IBinder windowToken) { InputMethodManager mgr = (InputMethodManager) c.getSystemService(Context.INPUT_METHOD_SERVICE); mgr.hideSoftInputFromWindow(windowToken, 0); } }