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.controller; import android.annotation.TargetApi; import android.app.Activity; import android.content.ContentUris; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.media.MediaPlayer; import android.media.MediaPlayer.OnCompletionListener; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.os.Environment; import android.os.SystemClock; import android.provider.DocumentsContract; import android.provider.MediaStore; import android.support.v4.app.FragmentTransaction; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.text.format.DateUtils; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Chronometer; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.ListView; import android.widget.TextView; import hku.fyp14017.blencode.ProjectManager; import hku.fyp14017.blencode.R; import hku.fyp14017.blencode.common.Constants; import hku.fyp14017.blencode.common.SoundInfo; import hku.fyp14017.blencode.io.StorageHandler; import hku.fyp14017.blencode.ui.ScriptActivity; import hku.fyp14017.blencode.ui.SoundViewHolder; import hku.fyp14017.blencode.ui.adapter.SoundBaseAdapter; import hku.fyp14017.blencode.ui.fragment.BackPackSoundFragment; import hku.fyp14017.blencode.ui.fragment.ScriptFragment; import hku.fyp14017.blencode.ui.fragment.SoundFragment; import hku.fyp14017.blencode.utils.UtilFile; import hku.fyp14017.blencode.utils.Utils; import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.Iterator; import java.util.SortedSet; import hku.fyp14017.blencode.ProjectManager; import hku.fyp14017.blencode.common.Constants; import hku.fyp14017.blencode.common.SoundInfo; import hku.fyp14017.blencode.ui.ScriptActivity; import hku.fyp14017.blencode.ui.SoundViewHolder; import hku.fyp14017.blencode.ui.adapter.SoundBaseAdapter; import hku.fyp14017.blencode.ui.fragment.BackPackSoundFragment; import hku.fyp14017.blencode.ui.fragment.ScriptFragment; import hku.fyp14017.blencode.ui.fragment.SoundFragment; import hku.fyp14017.blencode.utils.UtilFile; public final class SoundController { public static final String BUNDLE_ARGUMENTS_SELECTED_SOUND = "selected_sound"; public static final String SHARED_PREFERENCE_NAME = "showDetailsSounds"; public static final int ID_LOADER_MEDIA_IMAGE = 1; public static final int REQUEST_SELECT_MUSIC = 0; private static final SoundController INSTANCE = new SoundController(); private static final String TAG = SoundController.class.getSimpleName(); private SoundController() { } public static SoundController getInstance() { return INSTANCE; } /** * Get a file path from a Uri. This will get the the path for Storage Access * Framework Documents, as well as the _data field for the MediaStore and * other file-based ContentProviders. * <p/> * <p/> * solution according to: * http://stackoverflow.com/questions/19834842/android-gallery-on-kitkat-returns-different-uri * -for-intent-action-get-content * * @author paulburke */ @TargetApi(19) private static String getPathForVersionAboveEqualsVersion19(final Context context, final Uri uri) { final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT; // DocumentProvider if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) { // ExternalStorageProvider if (isExternalStorageDocument(uri)) { final String docId = DocumentsContract.getDocumentId(uri); final String[] split = docId.split(":"); final String type = split[0]; if ("primary".equalsIgnoreCase(type)) { return Environment.getExternalStorageDirectory() + "/" + split[1]; } // TODO handle non-primary volumes } // DownloadsProvider else if (isDownloadsDocument(uri)) { final String id = DocumentsContract.getDocumentId(uri); final Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id)); return getDataColumn(context, contentUri, null, null); } // MediaProvider else if (isMediaDocument(uri)) { final String docId = DocumentsContract.getDocumentId(uri); final String[] split = docId.split(":"); final String type = split[0]; Uri contentUri = null; if ("image".equals(type)) { contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI; } else if ("video".equals(type)) { contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI; } else if ("audio".equals(type)) { contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; } final String selection = "_id=?"; final String[] selectionArgs = new String[] { split[1] }; return getDataColumn(context, contentUri, selection, selectionArgs); } } // MediaStore (and general) else if ("content".equalsIgnoreCase(uri.getScheme())) { // Return the remote address if (isGooglePhotosUri(uri)) { return uri.getLastPathSegment(); } return getDataColumn(context, uri, null, null); } // File else if ("file".equalsIgnoreCase(uri.getScheme())) { return uri.getPath(); } return null; } private static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) { Cursor cursor = null; final String column = "_data"; final String[] projection = { column }; try { cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null); if (cursor != null && cursor.moveToFirst()) { final int index = cursor.getColumnIndexOrThrow(column); return cursor.getString(index); } } finally { if (cursor != null) { cursor.close(); } } return null; } private static boolean isExternalStorageDocument(Uri uri) { return "com.android.externalstorage.documents".equals(uri.getAuthority()); } private static boolean isDownloadsDocument(Uri uri) { return "com.android.providers.downloads.documents".equals(uri.getAuthority()); } private static boolean isMediaDocument(Uri uri) { return "com.android.providers.media.documents".equals(uri.getAuthority()); } private static boolean isGooglePhotosUri(Uri uri) { return "com.google.android.apps.photos.content".equals(uri.getAuthority()); } public void updateSoundLogic(Context context, final int position, final SoundViewHolder holder, final SoundBaseAdapter soundAdapter) { final SoundInfo soundInfo = soundAdapter.getSoundInfoItems().get(position); if (soundInfo == null) { return; } holder.playAndStopButton.setTag(position); holder.titleTextView.setText(soundInfo.getTitle()); handleCheckboxes(position, holder, soundAdapter); handleSoundInfo(holder, soundInfo, soundAdapter, position, context); handleDetails(soundAdapter, holder, soundInfo); setClickListener(soundAdapter, holder, soundInfo); } private void setClickListener(final SoundBaseAdapter soundAdapter, final SoundViewHolder holder, final SoundInfo soundInfo) { OnClickListener listItemOnClickListener = (new OnClickListener() { @Override public void onClick(View view) { if (soundAdapter.getSelectMode() != ListView.CHOICE_MODE_NONE) { holder.checkbox.setChecked(!holder.checkbox.isChecked()); } } }); if (soundAdapter.getSelectMode() != ListView.CHOICE_MODE_NONE) { holder.playAndStopButton.setOnClickListener(listItemOnClickListener); } else { if (soundInfo.isPlaying) { holder.playAndStopButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { if (soundAdapter.getOnSoundEditListener() != null) { soundAdapter.getOnSoundEditListener().onSoundPause(view); } } }); } else { holder.playAndStopButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { if (soundAdapter.getOnSoundEditListener() != null) { soundAdapter.getOnSoundEditListener().onSoundPlay(view); } } }); } } holder.soundFragmentButtonLayout.setOnClickListener(listItemOnClickListener); } private void handleDetails(SoundBaseAdapter soundAdapter, SoundViewHolder holder, SoundInfo soundInfo) { if (soundAdapter.getShowDetails()) { holder.soundFileSizeTextView.setText(UtilFile.getSizeAsString(new File(soundInfo.getAbsolutePath()))); holder.soundFileSizeTextView.setVisibility(TextView.VISIBLE); holder.soundFileSizePrefixTextView.setVisibility(TextView.VISIBLE); } else { holder.soundFileSizeTextView.setVisibility(TextView.GONE); holder.soundFileSizePrefixTextView.setVisibility(TextView.GONE); } } private void handleSoundInfo(SoundViewHolder holder, SoundInfo soundInfo, SoundBaseAdapter soundAdapter, int position, Context context) { try { MediaPlayer tempPlayer = new MediaPlayer(); tempPlayer.setDataSource(soundInfo.getAbsolutePath()); tempPlayer.prepare(); long milliseconds = tempPlayer.getDuration(); long seconds = milliseconds / 1000; if (seconds == 0) { seconds = 1; } String timeDisplayed = DateUtils.formatElapsedTime(seconds); holder.timePlayedChronometer.setText(timeDisplayed); holder.timePlayedChronometer.setVisibility(Chronometer.VISIBLE); if (soundAdapter.getCurrentPlayingPosition() == Constants.NO_POSITION) { SoundBaseAdapter.setElapsedMilliSeconds(0); } else { SoundBaseAdapter.setElapsedMilliSeconds( SystemClock.elapsedRealtime() - SoundBaseAdapter.getCurrentPlayingBase()); } if (soundInfo.isPlaying) { holder.playAndStopButton.setImageResource(hku.fyp14017.blencode.R.drawable.ic_media_stop); holder.playAndStopButton .setContentDescription(context.getString(hku.fyp14017.blencode.R.string.sound_stop)); if (soundAdapter.getCurrentPlayingPosition() == Constants.NO_POSITION) { startPlayingSound(holder.timePlayedChronometer, position, soundAdapter); } else if ((position == soundAdapter.getCurrentPlayingPosition()) && (SoundBaseAdapter.getElapsedMilliSeconds() > (milliseconds - 1000))) { stopPlayingSound(soundInfo, holder.timePlayedChronometer, soundAdapter); } else { continuePlayingSound(holder.timePlayedChronometer, SystemClock.elapsedRealtime()); } } else { holder.playAndStopButton.setImageResource(hku.fyp14017.blencode.R.drawable.ic_media_play); holder.playAndStopButton .setContentDescription(context.getString(hku.fyp14017.blencode.R.string.sound_play)); stopPlayingSound(soundInfo, holder.timePlayedChronometer, soundAdapter); } tempPlayer.reset(); tempPlayer.release(); } catch (IOException ioException) { Log.e(TAG, "Cannot get view.", ioException); } } private void handleCheckboxes(final int position, SoundViewHolder holder, final SoundBaseAdapter soundAdapter) { holder.checkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) { if (soundAdapter.getSelectMode() == ListView.CHOICE_MODE_SINGLE) { soundAdapter.clearCheckedItems(); } soundAdapter.getCheckedSounds().add(position); } else { soundAdapter.getCheckedSounds().remove(position); } soundAdapter.notifyDataSetChanged(); if (soundAdapter.getOnSoundEditListener() != null) { soundAdapter.getOnSoundEditListener().onSoundChecked(); } } }); if (soundAdapter.getSelectMode() != ListView.CHOICE_MODE_NONE) { holder.checkbox.setVisibility(View.VISIBLE); holder.checkbox.setVisibility(View.VISIBLE); holder.soundFragmentButtonLayout .setBackgroundResource(hku.fyp14017.blencode.R.drawable.button_background_shadowed); } else { holder.checkbox.setVisibility(View.GONE); holder.checkbox.setVisibility(View.GONE); holder.soundFragmentButtonLayout .setBackgroundResource(hku.fyp14017.blencode.R.drawable.button_background_selector); holder.checkbox.setChecked(false); soundAdapter.clearCheckedItems(); } if (soundAdapter.getCheckedSounds().contains(position)) { holder.checkbox.setChecked(true); } else { holder.checkbox.setChecked(false); } } private void startPlayingSound(Chronometer chronometer, int position, final SoundBaseAdapter soundAdapter) { soundAdapter.setCurrentPlayingPosition(position); SoundBaseAdapter.setCurrentPlayingBase(SystemClock.elapsedRealtime()); continuePlayingSound(chronometer, SoundBaseAdapter.getCurrentPlayingBase()); } private void continuePlayingSound(Chronometer chronometer, long base) { chronometer.setBase(base); chronometer.start(); } private void stopPlayingSound(SoundInfo soundInfo, Chronometer chronometer, final SoundBaseAdapter soundAdapter) { chronometer.stop(); soundAdapter.setCurrentPlayingPosition(Constants.NO_POSITION); soundInfo.isPlaying = false; } public void backPackSound(SoundInfo selectedSoundInfo, BackPackSoundFragment backPackSoundActivity, ArrayList<SoundInfo> soundInfoList, SoundBaseAdapter adapter) { copySoundBackPack(selectedSoundInfo, soundInfoList, adapter); } private void copySoundBackPack(SoundInfo selectedSoundInfo, ArrayList<SoundInfo> soundInfoList, SoundBaseAdapter adapter) { try { StorageHandler.getInstance().copySoundFileBackPack(selectedSoundInfo); } catch (IOException ioException) { Log.e(TAG, Log.getStackTraceString(ioException)); } updateBackPackActivity(selectedSoundInfo.getTitle(), selectedSoundInfo.getSoundFileName(), soundInfoList, adapter); } public SoundInfo copySound(SoundInfo selectedSoundInfo, ArrayList<SoundInfo> soundInfoList, SoundBaseAdapter adapter) { try { StorageHandler.getInstance().copySoundFile(selectedSoundInfo.getAbsolutePath()); } catch (IOException ioException) { Log.e(TAG, Log.getStackTraceString(ioException)); } return updateSoundAdapter(selectedSoundInfo.getTitle(), selectedSoundInfo.getSoundFileName(), soundInfoList, adapter); } public void copySound(int position, ArrayList<SoundInfo> soundInfoList, SoundBaseAdapter adapter) { SoundInfo soundInfo = soundInfoList.get(position); try { StorageHandler.getInstance().copySoundFile(soundInfo.getAbsolutePath()); } catch (IOException ioException) { Log.e(TAG, Log.getStackTraceString(ioException)); } SoundController.getInstance().updateSoundAdapter(soundInfo.getTitle(), soundInfo.getSoundFileName(), soundInfoList, adapter); } private void deleteSound(int position, ArrayList<SoundInfo> soundInfoList, Activity activity) { StorageHandler.getInstance().deleteFile(soundInfoList.get(position).getAbsolutePath()); soundInfoList.remove(position); ProjectManager.getInstance().getCurrentSprite().setSoundList(soundInfoList); activity.sendBroadcast(new Intent(ScriptActivity.ACTION_SOUND_DELETED)); } public void deleteCheckedSounds(Activity activity, SoundBaseAdapter adapter, ArrayList<SoundInfo> soundInfoList, MediaPlayer mediaPlayer) { SortedSet<Integer> checkedSounds = adapter.getCheckedItems(); Iterator<Integer> iterator = checkedSounds.iterator(); SoundController.getInstance().stopSoundAndUpdateList(mediaPlayer, soundInfoList, adapter); int numberDeleted = 0; while (iterator.hasNext()) { int position = iterator.next(); deleteSound(position - numberDeleted, soundInfoList, activity); ++numberDeleted; } } public SoundInfo updateBackPackActivity(String title, String fileName, ArrayList<SoundInfo> soundInfoList, SoundBaseAdapter adapter) { title = Utils.getUniqueSoundName(title); SoundInfo newSoundInfo = new SoundInfo(); newSoundInfo.setTitle(title); newSoundInfo.setSoundFileName(fileName); soundInfoList.add(newSoundInfo); adapter.notifyDataSetChanged(); return newSoundInfo; } public SoundInfo updateSoundAdapter(String title, String fileName, ArrayList<SoundInfo> soundInfoList, SoundBaseAdapter adapter) { title = Utils.getUniqueSoundName(title); SoundInfo newSoundInfo = new SoundInfo(); newSoundInfo.setTitle(title); newSoundInfo.setSoundFileName(fileName); soundInfoList.add(newSoundInfo); adapter.notifyDataSetChanged(); return newSoundInfo; } public boolean isSoundPlaying(MediaPlayer mediaPlayer) { return mediaPlayer.isPlaying(); } public void stopSound(MediaPlayer mediaPlayer, ArrayList<SoundInfo> soundInfoList) { if (isSoundPlaying(mediaPlayer)) { mediaPlayer.stop(); } for (int i = 0; i < soundInfoList.size(); i++) { soundInfoList.get(i).isPlaying = false; } } public void handlePlaySoundButton(View view, ArrayList<SoundInfo> soundInfoList, MediaPlayer mediaPlayer, final SoundBaseAdapter adapter) { final int position = (Integer) view.getTag(); final SoundInfo soundInfo = soundInfoList.get(position); stopSound(mediaPlayer, soundInfoList); if (!soundInfo.isPlaying) { startSound(soundInfo, mediaPlayer); adapter.notifyDataSetChanged(); } mediaPlayer.setOnCompletionListener(new OnCompletionListener() { @Override public void onCompletion(MediaPlayer mediaplayer) { soundInfo.isPlaying = false; adapter.notifyDataSetChanged(); } }); } public void stopSoundAndUpdateList(MediaPlayer mediaPlayer, ArrayList<SoundInfo> soundInfoList, SoundBaseAdapter adapter) { if (!isSoundPlaying(mediaPlayer)) { return; } stopSound(mediaPlayer, soundInfoList); adapter.notifyDataSetChanged(); } public void startSound(SoundInfo soundInfo, MediaPlayer mediaPlayer) { if (!soundInfo.isPlaying) { try { mediaPlayer.reset(); mediaPlayer.setDataSource(soundInfo.getAbsolutePath()); mediaPlayer.prepare(); mediaPlayer.start(); soundInfo.isPlaying = true; } catch (IOException ioException) { Log.e(TAG, "Cannot start sound.", ioException); } } } public Loader<Cursor> onCreateLoader(int id, Bundle arguments, Activity activity) { Uri audioUri = null; if (arguments != null) { audioUri = (Uri) arguments.get(BUNDLE_ARGUMENTS_SELECTED_SOUND); } String[] projection = { MediaStore.Audio.Media.DATA }; return new CursorLoader(activity, audioUri, projection, null, null, null); } public String onLoadFinished(Loader<Cursor> loader, Cursor data, Activity activity) { String audioPath = ""; CursorLoader cursorLoader = (CursorLoader) loader; if (data == null) { audioPath = cursorLoader.getUri().getPath(); } else { data.moveToFirst(); audioPath = data.getString(data.getColumnIndex(MediaStore.Audio.Media.DATA)); } //workaround for android 4.4 issue #848 if (audioPath == null && Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN_MR2) { audioPath = getPathForVersionAboveEqualsVersion19(activity, cursorLoader.getUri()); } if (audioPath.equalsIgnoreCase("")) { Utils.showErrorDialog(activity, hku.fyp14017.blencode.R.string.error_load_sound); audioPath = ""; return audioPath; } else { return audioPath; } } public void handleAddButtonFromNew(SoundFragment soundFragment) { ScriptActivity scriptActivity = (ScriptActivity) soundFragment.getActivity(); if (scriptActivity.getIsSoundFragmentFromPlaySoundBrickNew() && !scriptActivity.getIsSoundFragmentHandleAddButtonHandled()) { scriptActivity.setIsSoundFragmentHandleAddButtonHandled(true); soundFragment.handleAddButton(); } } public void switchToScriptFragment(SoundFragment soundFragment) { ScriptActivity scriptActivity = (ScriptActivity) soundFragment.getActivity(); scriptActivity.setCurrentFragment(ScriptActivity.FRAGMENT_SCRIPTS); FragmentTransaction fragmentTransaction = scriptActivity.getSupportFragmentManager().beginTransaction(); fragmentTransaction.hide(soundFragment); fragmentTransaction.show(scriptActivity.getSupportFragmentManager().findFragmentByTag(ScriptFragment.TAG)); fragmentTransaction.commit(); scriptActivity.setIsSoundFragmentFromPlaySoundBrickNewFalse(); scriptActivity.setIsSoundFragmentHandleAddButtonHandled(false); } }