Java tutorial
/* * Copyright (C) 2013 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 com.eugene.fithealthmaingit.UI.Dialogs; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.content.DialogInterface; import android.content.SharedPreferences; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.annotation.NonNull; import android.view.View; import android.widget.EditText; import com.eugene.fithealthmaingit.Databases_Adapters_ListViews.LogWeight.WeightLog; import com.eugene.fithealthmaingit.R; import com.eugene.fithealthmaingit.Utilities.Globals; import java.util.Date; /** * Created by Eugene on 6/10/2015. */ public class UpdateWeightDialogFragment extends android.support.v4.app.DialogFragment { View v; @NonNull @Override public Dialog onCreateDialog(Bundle savedInstanceState) { v = getActivity().getLayoutInflater().inflate(R.layout.dialog_weight, null); findViews(); // alert Dialog builder implementation AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); builder.setView(v); builder.setPositiveButton("Save", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { WeightLog logMeal = new WeightLog(); logMeal.setDate(new Date()); EditText editText = (EditText) v.findViewById(R.id.updateWeight); logMeal.setCurrentWeight(Double.valueOf(editText.getText().toString())); logMeal.save(); savePreferences(Globals.USER_WEIGHT, editText.getText().toString()); mCallbacks.updateWeight(); } }); builder.setNegativeButton("Cancel", null); return builder.create(); } private void savePreferences(String key, String value) { SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getActivity()); SharedPreferences.Editor editor = sharedPreferences.edit(); editor.putString(key, value).apply(); } private void findViews() { } private FragmentCallbacks mCallbacks; public interface FragmentCallbacks { void updateWeight(); } @Override public void onAttach(Activity activity) { super.onAttach(activity); try { mCallbacks = (FragmentCallbacks) activity; } catch (ClassCastException e) { throw new ClassCastException("Activity must implement Fragment One."); } } @Override public void onDetach() { super.onDetach(); mCallbacks = null; } }