Java tutorial
/* * Catroid: An on-device visual programming system for Android devices * Copyright (C) 2010-2014 The Catrobat Team * (<http://developer.fyp14017.hku/credits>) * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * An additional term exception under section 7 of the GNU Affero * General Public License, version 3, is available at * http://developer.fyp14017.hku/license_additional_term * * 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.hku/licenses/>. */ package hku.fyp14017.blencode.ui.fragment; import android.app.AlertDialog; import android.app.Dialog; import android.content.BroadcastReceiver; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.IntentFilter; import android.content.SharedPreferences; import android.database.Cursor; import android.media.MediaPlayer; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.v4.app.LoaderManager; import android.support.v4.content.Loader; import android.text.Spannable; import android.text.SpannableString; import android.text.style.ForegroundColorSpan; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.AdapterContextMenuInfo; import android.widget.AdapterView.OnItemLongClickListener; import android.widget.CheckBox; import android.widget.Chronometer; import android.widget.ImageButton; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import com.actionbarsherlock.view.ActionMode; import com.actionbarsherlock.view.Menu; import hku.fyp14017.blencode.R; import hku.fyp14017.blencode.common.Constants; import hku.fyp14017.blencode.common.SoundInfo; import hku.fyp14017.blencode.ui.BottomBar; import hku.fyp14017.blencode.ui.ScriptActivity; import hku.fyp14017.blencode.ui.SoundViewHolder; import hku.fyp14017.blencode.ui.adapter.BackPackSoundAdapter; import hku.fyp14017.blencode.ui.adapter.SoundBaseAdapter; import hku.fyp14017.blencode.ui.controller.BackPackListManager; import hku.fyp14017.blencode.ui.controller.SoundController; import hku.fyp14017.blencode.ui.dialogs.CustomAlertDialogBuilder; import hku.fyp14017.blencode.ui.dialogs.DeleteSoundDialog; import hku.fyp14017.blencode.utils.Utils; import hku.fyp14017.blencode.common.Constants; import hku.fyp14017.blencode.ui.ScriptActivity; import hku.fyp14017.blencode.ui.SoundViewHolder; import hku.fyp14017.blencode.ui.adapter.SoundBaseAdapter; import hku.fyp14017.blencode.ui.dialogs.DeleteSoundDialog; public class BackPackSoundFragment extends BackPackActivityFragment implements SoundBaseAdapter.OnSoundEditListener, LoaderManager.LoaderCallbacks<Cursor>, Dialog.OnKeyListener { public static final String TAG = BackPackSoundFragment.class.getSimpleName(); private static int selectedSoundPosition = Constants.NO_POSITION; private SoundDeletedReceiver soundDeletedReceiver; private ActionMode actionMode; private View selectAllActionModeButton; private static String actionModeTitle; private static String singleItemAppendixDeleteActionMode; private static String multipleItemAppendixDeleteActionMode; private MediaPlayer mediaPlayer; private BackPackSoundAdapter adapter; private SoundInfo selectedSoundInfoBackPack; private ListView listView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setHasOptionsMenu(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(hku.fyp14017.blencode.R.layout.fragment_sounds, container, false); return rootView; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); listView = getListView(); registerForContextMenu(listView); if (savedInstanceState != null) { selectedSoundInfoBackPack = (SoundInfo) savedInstanceState .getSerializable(SoundController.BUNDLE_ARGUMENTS_SELECTED_SOUND); } adapter = new BackPackSoundAdapter(getActivity(), hku.fyp14017.blencode.R.layout.fragment_sound_soundlist_item, hku.fyp14017.blencode.R.id.fragment_sound_item_title_text_view, BackPackListManager.getInstance().getSoundInfoArrayList(), false, this); adapter.setOnSoundEditListener(this); setListAdapter(adapter); } @Override public void onPrepareOptionsMenu(Menu menu) { menu.findItem(hku.fyp14017.blencode.R.id.copy).setVisible(false); if (BackPackListManager.getInstance().getSoundInfoArrayList().size() > 0) { menu.findItem(hku.fyp14017.blencode.R.id.unpacking).setVisible(true); } BottomBar.hideBottomBar(getActivity()); super.onPrepareOptionsMenu(menu); } @Override public void onCreateContextMenu(ContextMenu menu, View view, ContextMenuInfo menuInfo) { super.onCreateContextMenu(menu, view, menuInfo); if (SoundController.getInstance().isSoundPlaying(mediaPlayer)) { SoundController.getInstance().stopSoundAndUpdateList(mediaPlayer, BackPackListManager.getInstance().getSoundInfoArrayList(), adapter); } selectedSoundInfoBackPack = adapter.getItem(selectedSoundPosition); menu.setHeaderTitle(selectedSoundInfoBackPack.getTitle()); adapter.addCheckedItem(((AdapterContextMenuInfo) menuInfo).position); getSherlockActivity().getMenuInflater().inflate(hku.fyp14017.blencode.R.menu.context_menu_unpacking, menu); } @Override public boolean onContextItemSelected(MenuItem item) { switch (item.getItemId()) { case hku.fyp14017.blencode.R.id.context_menu_unpacking: SoundController.getInstance().copySound(selectedSoundInfoBackPack, BackPackListManager.getCurrentSoundInfoArrayList(), BackPackListManager.getCurrentAdapter()); String textForUnPacking = getResources() .getQuantityString(hku.fyp14017.blencode.R.plurals.unpacking_items_plural, 1); Toast.makeText(getActivity(), selectedSoundInfoBackPack.getTitle() + " " + textForUnPacking, Toast.LENGTH_SHORT).show(); break; case hku.fyp14017.blencode.R.id.context_menu_delete: showConfirmDeleteDialog(); break; } return super.onContextItemSelected(item); } @Override public void onSaveInstanceState(Bundle outState) { outState.putSerializable(SoundController.BUNDLE_ARGUMENTS_SELECTED_SOUND, selectedSoundInfoBackPack); super.onSaveInstanceState(outState); } @Override public void onStart() { super.onStart(); mediaPlayer = new MediaPlayer(); initClickListener(); } @Override public void onResume() { super.onResume(); if (soundDeletedReceiver == null) { soundDeletedReceiver = new SoundDeletedReceiver(); } IntentFilter intentFilterDeleteSound = new IntentFilter(ScriptActivity.ACTION_SOUND_DELETED); getActivity().registerReceiver(soundDeletedReceiver, intentFilterDeleteSound); SharedPreferences settings = PreferenceManager .getDefaultSharedPreferences(getActivity().getApplicationContext()); setShowDetails(settings.getBoolean(SoundController.SHARED_PREFERENCE_NAME, false)); } @Override public void onPause() { super.onPause(); SoundController.getInstance().stopSound(mediaPlayer, BackPackListManager.getInstance().getSoundInfoArrayList()); adapter.notifyDataSetChanged(); if (soundDeletedReceiver != null) { getActivity().unregisterReceiver(soundDeletedReceiver); } SharedPreferences settings = PreferenceManager .getDefaultSharedPreferences(getActivity().getApplicationContext()); SharedPreferences.Editor editor = settings.edit(); editor.putBoolean(SoundController.SHARED_PREFERENCE_NAME, getShowDetails()); editor.commit(); } @Override public void onStop() { super.onStop(); mediaPlayer.reset(); mediaPlayer.release(); mediaPlayer = null; } private void initClickListener() { listView.setOnItemLongClickListener(new OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { selectedSoundPosition = position; return false; } }); } private class SoundDeletedReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { if (intent.getAction().equals(ScriptActivity.ACTION_SOUND_DELETED)) { adapter.notifyDataSetChanged(); getActivity().sendBroadcast(new Intent(ScriptActivity.ACTION_BRICK_LIST_CHANGED)); } } } public View getView(int position, View convertView) { SoundViewHolder holder; if (convertView == null) { convertView = View.inflate(getActivity(), hku.fyp14017.blencode.R.layout.fragment_sound_soundlist_item, null); holder = new SoundViewHolder(); holder.playAndStopButton = (ImageButton) convertView .findViewById(hku.fyp14017.blencode.R.id.fragment_sound_item_image_button); holder.playAndStopButton.setImageResource(hku.fyp14017.blencode.R.drawable.ic_media_play); holder.playAndStopButton.setContentDescription(getString(hku.fyp14017.blencode.R.string.sound_play)); holder.soundFragmentButtonLayout = (LinearLayout) convertView .findViewById(hku.fyp14017.blencode.R.id.fragment_sound_item_main_linear_layout); holder.checkbox = (CheckBox) convertView .findViewById(hku.fyp14017.blencode.R.id.fragment_sound_item_checkbox); holder.titleTextView = (TextView) convertView .findViewById(hku.fyp14017.blencode.R.id.fragment_sound_item_title_text_view); holder.timeSeparatorTextView = (TextView) convertView .findViewById(hku.fyp14017.blencode.R.id.fragment_sound_item_time_seperator_text_view); holder.soundFileSizePrefixTextView = (TextView) convertView .findViewById(hku.fyp14017.blencode.R.id.fragment_sound_item_size_prefix_text_view); holder.soundFileSizeTextView = (TextView) convertView .findViewById(hku.fyp14017.blencode.R.id.fragment_sound_item_size_text_view); holder.timePlayedChronometer = (Chronometer) convertView .findViewById(hku.fyp14017.blencode.R.id.fragment_sound_item_time_played_chronometer); convertView.setTag(holder); } else { holder = (SoundViewHolder) convertView.getTag(); } SoundController controller = SoundController.getInstance(); controller.updateSoundLogic(getActivity(), position, holder, adapter); return convertView; } @Override public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) { return false; } @Override public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) { return null; } @Override public void onLoadFinished(Loader<Cursor> arg0, Cursor arg1) { } @Override public void onLoaderReset(Loader<Cursor> arg0) { } @Override public void onSoundPlay(View view) { SoundController.getInstance().handlePlaySoundButton(view, BackPackListManager.getInstance().getSoundInfoArrayList(), mediaPlayer, adapter); } @Override public void onSoundPause(View view) { handlePauseSoundButton(view); } public void handlePauseSoundButton(View view) { final int position = (Integer) view.getTag(); pauseSound(BackPackListManager.getInstance().getSoundInfoArrayList().get(position)); adapter.notifyDataSetChanged(); } public void pauseSound(SoundInfo soundInfo) { mediaPlayer.pause(); soundInfo.isPlaying = false; } @Override public void onSoundChecked() { if (actionMode == null) { return; } updateActionModeTitle(); Utils.setSelectAllActionModeButtonVisibility(selectAllActionModeButton, adapter.getCount() > 0 && adapter.getAmountOfCheckedItems() != adapter.getCount()); } private void updateActionModeTitle() { int numberOfSelectedItems = adapter.getAmountOfCheckedItems(); if (numberOfSelectedItems == 0) { actionMode.setTitle(actionModeTitle); } else { String appendix = multipleItemAppendixDeleteActionMode; if (numberOfSelectedItems == 1) { appendix = singleItemAppendixDeleteActionMode; } String numberOfItems = Integer.toString(numberOfSelectedItems); String completeTitle = actionModeTitle + " " + numberOfItems + " " + appendix; int titleLength = actionModeTitle.length(); Spannable completeSpannedTitle = new SpannableString(completeTitle); completeSpannedTitle.setSpan( new ForegroundColorSpan( getResources().getColor(hku.fyp14017.blencode.R.color.actionbar_title_color)), titleLength + 1, titleLength + (1 + numberOfItems.length()), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); actionMode.setTitle(completeSpannedTitle); } } @Override public boolean getShowDetails() { // TODO CHANGE THIS!!! (was just a quick fix) if (adapter != null) { return adapter.getShowDetails(); } else { return false; } } @Override public void setShowDetails(boolean showDetails) { if (adapter != null) { adapter.setShowDetails(showDetails); adapter.notifyDataSetChanged(); } } @Override public void setSelectMode(int selectMode) { adapter.setSelectMode(selectMode); adapter.notifyDataSetChanged(); } @Override public int getSelectMode() { return adapter.getSelectMode(); } public void clearCheckedSoundsAndEnableButtons() { setSelectMode(ListView.CHOICE_MODE_NONE); adapter.clearCheckedItems(); actionMode = null; setActionModeActive(false); registerForContextMenu(listView); BottomBar.hideBottomBar(getActivity()); } @Override public void startUnPackingActionMode() { if (actionMode == null) { SoundController.getInstance().stopSoundAndUpdateList(mediaPlayer, BackPackListManager.getInstance().getSoundInfoArrayList(), adapter); actionMode = getSherlockActivity().startActionMode(unpackingModeCallBack); unregisterForContextMenu(listView); BottomBar.hideBottomBar(getActivity()); } } private void addSelectAllActionModeButton(ActionMode mode, Menu menu) { selectAllActionModeButton = Utils.addSelectAllActionModeButton(getLayoutInflater(null), mode, menu); selectAllActionModeButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { for (int position = 0; position < adapter.getCount(); position++) { adapter.addCheckedItem(position); } adapter.notifyDataSetChanged(); onSoundChecked(); } }); } private ActionMode.Callback unpackingModeCallBack = new ActionMode.Callback() { @Override public boolean onPrepareActionMode(ActionMode mode, Menu menu) { return false; } @Override public boolean onCreateActionMode(ActionMode mode, Menu menu) { setSelectMode(ListView.CHOICE_MODE_MULTIPLE); setActionModeActive(true); actionModeTitle = getString(hku.fyp14017.blencode.R.string.unpacking); singleItemAppendixDeleteActionMode = getString(hku.fyp14017.blencode.R.string.category_sound); multipleItemAppendixDeleteActionMode = getString(hku.fyp14017.blencode.R.string.sounds); mode.setTitle(hku.fyp14017.blencode.R.string.unpacking); addSelectAllActionModeButton(mode, menu); return true; } @Override public boolean onActionItemClicked(ActionMode mode, com.actionbarsherlock.view.MenuItem item) { return false; } @Override public void onDestroyActionMode(ActionMode mode) { showUnpackingConfirmationMessage(); adapter.onDestroyActionModeUnpacking(mode); } }; @Override public void startDeleteActionMode() { if (actionMode == null) { SoundController.getInstance().stopSoundAndUpdateList(mediaPlayer, BackPackListManager.getInstance().getSoundInfoArrayList(), adapter); actionMode = getSherlockActivity().startActionMode(deleteModeCallBack); unregisterForContextMenu(listView); BottomBar.hideBottomBar(getActivity()); } } private ActionMode.Callback deleteModeCallBack = new ActionMode.Callback() { @Override public boolean onPrepareActionMode(ActionMode mode, Menu menu) { return false; } @Override public boolean onCreateActionMode(ActionMode mode, Menu menu) { setSelectMode(ListView.CHOICE_MODE_MULTIPLE); setActionModeActive(true); actionModeTitle = getString(hku.fyp14017.blencode.R.string.delete); singleItemAppendixDeleteActionMode = getString(hku.fyp14017.blencode.R.string.category_sound); multipleItemAppendixDeleteActionMode = getString(hku.fyp14017.blencode.R.string.sounds); mode.setTitle(hku.fyp14017.blencode.R.string.delete); addSelectAllActionModeButton(mode, menu); return true; } @Override public boolean onActionItemClicked(ActionMode mode, com.actionbarsherlock.view.MenuItem item) { return false; } @Override public void onDestroyActionMode(ActionMode mode) { if (adapter.getAmountOfCheckedItems() == 0) { clearCheckedSoundsAndEnableButtons(); } else { showConfirmDeleteDialog(); } } }; private void showConfirmDeleteDialog() { int titleId; if (adapter.getAmountOfCheckedItems() == 1) { titleId = hku.fyp14017.blencode.R.string.dialog_confirm_delete_sound_title; } else { titleId = hku.fyp14017.blencode.R.string.dialog_confirm_delete_multiple_sounds_title; } AlertDialog.Builder builder = new CustomAlertDialogBuilder(getActivity()); builder.setTitle(titleId); builder.setMessage(hku.fyp14017.blencode.R.string.dialog_confirm_delete_sound_message); builder.setPositiveButton(hku.fyp14017.blencode.R.string.yes, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { SoundController.getInstance().deleteCheckedSounds(getActivity(), adapter, BackPackListManager.getInstance().getSoundInfoArrayList(), mediaPlayer); clearCheckedSoundsAndEnableButtons(); } }); builder.setNegativeButton(hku.fyp14017.blencode.R.string.no, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { dialog.cancel(); clearCheckedSoundsAndEnableButtons(); } }); AlertDialog alertDialog = builder.create(); alertDialog.show(); } @Override protected void showDeleteDialog() { DeleteSoundDialog deleteSoundDialog = DeleteSoundDialog.newInstance(selectedSoundPosition); deleteSoundDialog.show(getFragmentManager(), DeleteSoundDialog.DIALOG_FRAGMENT_TAG); } private void showUnpackingConfirmationMessage() { String messageForUser = getResources().getQuantityString( hku.fyp14017.blencode.R.plurals.unpacking_items_plural, adapter.getAmountOfCheckedItems()); Toast.makeText(getActivity(), messageForUser, Toast.LENGTH_SHORT).show(); } public BackPackSoundAdapter getAdapter() { return adapter; } }