Java tutorial
/** * * This is OpenTraining, an Android application for planning your your fitness training. * Copyright (C) 2012-2014 Christian Skubich * * This program 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 program. If not, see <http://www.gnu.org/licenses/>. * */ package de.skubware.opentraining.activity.create_exercise; import java.io.File; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Locale; import java.util.Map; import java.util.SortedSet; import java.util.TreeSet; import android.support.v4.app.FragmentTransaction; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.DialogInterface.OnClickListener; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.view.ViewPager; import android.support.v7.app.ActionBar; import android.support.v7.app.ActionBarActivity; import android.util.Log; import android.view.KeyEvent; import android.view.Menu; import android.view.MenuItem; import android.view.MenuItem.OnMenuItemClickListener; import de.skubware.opentraining.R; import de.skubware.opentraining.activity.create_exercise.ExerciseImageListAdapter.ImageData; import de.skubware.opentraining.basic.ExerciseType; import de.skubware.opentraining.basic.License; import de.skubware.opentraining.basic.Muscle; import de.skubware.opentraining.basic.SportsEquipment; import de.skubware.opentraining.basic.ExerciseType.ExerciseSource; import de.skubware.opentraining.db.Cache; import de.skubware.opentraining.db.DataProvider; import de.skubware.opentraining.db.IDataProvider; import android.widget.Toast; /** * An activity for creating new {@link ExerciseType}s. * */ public class CreateExerciseActivity extends ActionBarActivity implements ActionBar.TabListener { /** Tag for logging*/ private final String TAG = "CreateExerciseActivity"; /** Static String for preferences. */ public final static String PREFERENCE_SHOW_SWIPE_TO_DISMISS_ADVISE = "SHOW_SWIPE_TO_DISMISS_ADVISE"; /** * The {@link android.support.v4.view.PagerAdapter} that will provide * fragments for each of the sections. We use a * {@link android.support.v4.app.FragmentPagerAdapter} derivative, which * will keep every loaded fragment in memory. If this becomes too memory * intensive, it may be best to switch to a * {@link android.support.v4.app.FragmentStatePagerAdapter}. */ SectionsPagerAdapter mSectionsPagerAdapter; /** * The {@link ViewPager} that will host the section contents. */ ViewPager mViewPager; /** Static int for onActivityResult */ static final int TAKE_PICTURE = 447; /** Static int for onActivityResult */ static final int CHOSE_PICTURE = 555; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_create_exercise); // Set up the action bar. final ActionBar actionBar = getSupportActionBar(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); // Create the adapter that will return a fragment for each of the three // primary sections of the app. mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager()); // Set up the ViewPager with the sections adapter. mViewPager = (ViewPager) findViewById(R.id.pager); mViewPager.setOffscreenPageLimit(mSectionsPagerAdapter.getCount()); mViewPager.setAdapter(mSectionsPagerAdapter); // When swiping between different sections, select the corresponding // tab. We can also use ActionBar.Tab#select() to do this if we have // a reference to the Tab. mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { actionBar.setSelectedNavigationItem(position); } }); // For each of the sections in the app, add a tab to the action bar. for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) { // Create a tab with text corresponding to the page title defined by // the adapter. Also specify this Activity object, which implements // the TabListener interface, as the callback (listener) for when // this tab is selected. actionBar .addTab(actionBar.newTab().setText(mSectionsPagerAdapter.getPageTitle(i)).setTabListener(this)); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_create_exercise, menu); // configure menu_create_exercise_info MenuItem menu_create_exercise_info = (MenuItem) menu.findItem(R.id.menuitem_create_exercise_info); menu_create_exercise_info.setOnMenuItemClickListener(new OnMenuItemClickListener() { public boolean onMenuItemClick(MenuItem item) { AlertDialog.Builder builder = new AlertDialog.Builder(CreateExerciseActivity.this); builder.setTitle(getString(R.string.title_about_creating_exercise)); builder.setMessage(getString(R.string.text_about_creating_exercise)); builder.create().show(); return true; } }); return true; } @Override public void onDestroy() { super.onDestroy(); // clean up images ImageFragment imageFragment = (ImageFragment) mSectionsPagerAdapter.getItem(2); List<ImageData> images = imageFragment.getImages(); IDataProvider dataProvider = new DataProvider(this); Cache.INSTANCE.updateCache(this); for (ImageData image : images) { // remove not used/referenced images dataProvider.deleteCustomImage(image.name, true); } } @Override public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { mViewPager.setCurrentItem(tab.getPosition()); } @Override public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { } @Override public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { } private static String makeFragmentName(int viewId, int index) { return "android:switcher:" + viewId + ":" + index; } /** Saves the created exercise. */ @SuppressWarnings("unchecked") private void saveExercise() { NameFragment nameFragment = (NameFragment) getSupportFragmentManager() .findFragmentByTag(makeFragmentName(R.id.pager, 0));// mSectionsPagerAdapter.getItem(0); DescriptionFragment descriptionFragment = (DescriptionFragment) getSupportFragmentManager() .findFragmentByTag(makeFragmentName(R.id.pager, 1)); ImageFragment imageFragment = (ImageFragment) getSupportFragmentManager() .findFragmentByTag(makeFragmentName(R.id.pager, 2)); SimpleDataFragment<Muscle> muscleDataFragment = (SpinnerDataFragment<Muscle>) getSupportFragmentManager() .findFragmentByTag(makeFragmentName(R.id.pager, 3)); EquipmentDataFragment equipmentDataFragment = (EquipmentDataFragment) getSupportFragmentManager() .findFragmentByTag(makeFragmentName(R.id.pager, 4)); DataProvider dataProvider = new DataProvider(this); // handle names Map<Locale, String> translationMap = nameFragment.getTranslationMap(); if (translationMap.isEmpty()) { Log.v(TAG, "User did not enter an exercise name."); Toast.makeText(this, getString(R.string.provide_name), Toast.LENGTH_LONG).show(); return; } // handle description String description = descriptionFragment.getExerciseDescription(); // handle muscle SortedSet<Muscle> muscleList = new TreeSet<Muscle>(muscleDataFragment.getChosenObjects()); // handle equipment SortedSet<SportsEquipment> equipmentList = new TreeSet<SportsEquipment>( equipmentDataFragment.getChosenObjects()); // save image List<ImageData> imageDataList = imageFragment.getImages(); List<File> imageList = new ArrayList<File>(); Map<File, License> imageLicenseMap = new HashMap<File, License>(); for (ImageData image : imageDataList) { File f = new File(image.name); imageList.add(f); imageLicenseMap.put(f, image.imageLicense); } ExerciseType.Builder exerciseBuilder = new ExerciseType.Builder(translationMap.values().iterator().next(), ExerciseSource.CUSTOM).description(description).translationMap(translationMap) .activatedMuscles(muscleList).neededTools(equipmentList).imagePath(imageList) .imageLicenseMap(imageLicenseMap); ExerciseType ex = exerciseBuilder.build(); // save exercise boolean succ = dataProvider.saveCustomExercise(ex); if (!succ) { Toast.makeText(this, getString(R.string.could_not_save_exercise), Toast.LENGTH_LONG).show(); } else { Toast.makeText(this, getString(R.string.exercise_saved), Toast.LENGTH_LONG).show(); finish(); } } /** * Show Dialog when user wants to go back. */ @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this); dialogBuilder.setTitle(getString(R.string.save_exercise)) .setMessage(getString(R.string.should_exercise_be_saved)) .setNegativeButton(getString(R.string.discard_exercise), new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); finish(); } }).setPositiveButton(getString(R.string.save), new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { saveExercise(); } }).create().show(); } return super.onKeyDown(keyCode, event); } /** * A {@link FragmentPagerAdapter} that returns a fragment corresponding to * one of the sections/tabs/pages. */ public class SectionsPagerAdapter extends FragmentPagerAdapter { public SectionsPagerAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { switch (position) { case 0: return new NameFragment(); case 1: return new DescriptionFragment(); case 2: return new ImageFragment(); case 3: return new MuscleDataFragment(); case 4: return new EquipmentDataFragment(); } throw new IllegalStateException("No fragment for position: " + position); } @Override public int getCount() { return 5; } @Override public CharSequence getPageTitle(int position) { switch (position) { case 0: return getString(R.string.title_name_fragment).toUpperCase(Locale.GERMANY); case 1: return getString(R.string.title_description_fragment).toUpperCase(Locale.GERMANY); case 2: return getString(R.string.title_image_fragment).toUpperCase(Locale.GERMANY); case 3: return getString(R.string.title_muscle_data_fragment).toUpperCase(Locale.GERMANY); case 4: return getString(R.string.title_equipment_data_fragment).toUpperCase(Locale.GERMANY); } return null; } } /** * Shows a toast message that explains "swipe-to-dismiss". */ public void swipeToDismissAdvise() { Toast.makeText(this, getString(R.string.swipe_to_dismiss_advise), Toast.LENGTH_LONG).show(); } }