Java tutorial
/* * Copyright (C) 2011 The MusicMod 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 org.musicmod.android.dialog; import org.musicmod.android.Constants; import org.musicmod.android.R; import org.musicmod.android.util.MusicUtils; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.DialogInterface.OnCancelListener; import android.content.DialogInterface.OnMultiChoiceClickListener; import android.content.DialogInterface.OnShowListener; import android.net.Uri; import android.os.Bundle; import android.provider.MediaStore.Audio; import android.support.v4.app.FragmentActivity; import android.view.View; import android.widget.Button; import android.widget.LinearLayout; import android.widget.Toast; //FIXME activity not found error when called by setData() public class DeleteDialog extends FragmentActivity implements Constants, OnMultiChoiceClickListener, DialogInterface.OnClickListener, OnCancelListener, OnShowListener, View.OnClickListener { private AlertDialog mDeleteMultiSelect, mDeleteConfirm; private boolean delete_lyrics, delete_music, restore_confirm; private final int DELETE_LYRICS_ID = 0, DELETE_MUSIC_ID = 1; private String KEY_DELETE_LYRICS = "delete_lyrics"; private String KEY_DELETE_MUSIC = "delete_music"; private String KEY_RESTORE_CONFIRM = "restore_confirm"; private String action; String mime_type, name, path = null; long[] items; @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(new LinearLayout(this)); icicle = icicle != null ? icicle : getIntent().getExtras(); action = getIntent().getAction(); if (INTENT_DELETE_ITEMS.equals(action)) { restore_confirm = icicle != null ? icicle.getBoolean(KEY_RESTORE_CONFIRM) : getIntent().getBooleanExtra(KEY_RESTORE_CONFIRM, false); delete_lyrics = icicle != null ? icicle.getBoolean(KEY_DELETE_LYRICS) : getIntent().getBooleanExtra(KEY_DELETE_LYRICS, false); delete_music = icicle != null ? icicle.getBoolean(KEY_DELETE_MUSIC) : getIntent().getBooleanExtra(KEY_DELETE_MUSIC, false); path = icicle != null ? icicle.getString(INTENT_KEY_PATH) : getIntent().getDataString(); if (path == null) path = ""; if (path.startsWith(Audio.Media.EXTERNAL_CONTENT_URI.toString())) { long id = Long.valueOf(Uri.parse(path).getLastPathSegment()); items = new long[] { id }; mime_type = Audio.Media.CONTENT_TYPE; name = MusicUtils.getTrackName(getApplicationContext(), id); } else if (path.startsWith(Audio.Albums.EXTERNAL_CONTENT_URI.toString())) { long id = Long.valueOf(Uri.parse(path).getLastPathSegment()); items = MusicUtils.getSongListForAlbum(getApplicationContext(), Long.valueOf(id)); mime_type = Audio.Albums.CONTENT_TYPE; name = MusicUtils.getAlbumName(getApplicationContext(), id, true); } else if (path.startsWith(Audio.Artists.EXTERNAL_CONTENT_URI.toString())) { long id = Long.valueOf(Uri.parse(path).getLastPathSegment()); items = MusicUtils.getSongListForArtist(getApplicationContext(), Long.valueOf(id)); mime_type = Audio.Artists.CONTENT_TYPE; name = MusicUtils.getArtistName(getApplicationContext(), id, true); } } else { Toast.makeText(this, R.string.error_bad_parameters, Toast.LENGTH_SHORT).show(); finish(); } } @Override public void onClick(DialogInterface dialog, int which, boolean isChecked) { switch (which) { case DELETE_LYRICS_ID: delete_lyrics = isChecked; break; case DELETE_MUSIC_ID: delete_music = isChecked; break; } if (mDeleteMultiSelect != null) { mDeleteMultiSelect.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(delete_lyrics || delete_music); } } @Override protected void onResume() { super.onResume(); mDeleteMultiSelect = new AlertDialog.Builder(this) .setMultiChoiceItems( new CharSequence[] { getString(R.string.delete_lyrics), getString(R.string.delete_music) }, new boolean[] { delete_lyrics, delete_music }, this) .setIcon(android.R.drawable.ic_dialog_alert).setTitle(R.string.delete) .setPositiveButton(android.R.string.ok, this).setNegativeButton(android.R.string.cancel, this) .setOnCancelListener(this).create(); mDeleteMultiSelect.setOnShowListener(this); mDeleteMultiSelect.show(); if (mDeleteConfirm != null && restore_confirm) { mDeleteConfirm.show(); } } @Override public void onPause() { if (mDeleteMultiSelect != null && mDeleteMultiSelect.isShowing()) { mDeleteMultiSelect.dismiss(); } if (mDeleteConfirm != null && mDeleteConfirm.isShowing()) { mDeleteConfirm.dismiss(); } super.onPause(); } @Override public void onShow(DialogInterface dialog) { Button mButton = mDeleteMultiSelect.getButton(AlertDialog.BUTTON_POSITIVE); mButton.setEnabled(delete_lyrics || delete_music); mButton.setOnClickListener(this); } @Override public void onClick(View v) { String desc = ""; if (Audio.Artists.CONTENT_TYPE.equals(mime_type)) { if (delete_lyrics) { desc += "\n" + getString(R.string.delete_artist_lyrics, name); } if (delete_music) { desc += "\n" + getString(R.string.delete_artist_tracks, name); } } else if (Audio.Albums.CONTENT_TYPE.equals(mime_type)) { if (delete_lyrics) { desc += "\n" + getString(R.string.delete_album_lyrics, name); } if (delete_music) { desc += "\n" + getString(R.string.delete_album_tracks, name); } } else if (Audio.Media.CONTENT_TYPE.equals(mime_type)) { if (delete_lyrics) { desc += "\n" + getString(R.string.delete_song_lyrics, name); } if (delete_music) { desc += "\n" + getString(R.string.delete_song_track, name); } } else { return; } confirmDelete(desc, items); } @Override public void onClick(DialogInterface dialog, int which) { if (dialog == mDeleteMultiSelect) { switch (which) { case DialogInterface.BUTTON_NEGATIVE: finish(); break; } } if (dialog == mDeleteConfirm) { switch (which) { case DialogInterface.BUTTON_POSITIVE: if (delete_lyrics) { MusicUtils.deleteLyrics(DeleteDialog.this, items); } if (delete_music) { MusicUtils.deleteTracks(DeleteDialog.this, items); } setResult(RESULT_DELETE_MUSIC); finish(); break; case DialogInterface.BUTTON_NEGATIVE: restore_confirm = false; break; } } } @Override public void onCancel(DialogInterface dialog) { if (dialog == mDeleteMultiSelect) { finish(); } if (dialog == mDeleteConfirm) { restore_confirm = false; } } @Override public void onSaveInstanceState(Bundle outcicle) { outcicle.putBoolean(KEY_RESTORE_CONFIRM, restore_confirm); outcicle.putBoolean(KEY_DELETE_LYRICS, delete_lyrics); outcicle.putBoolean(KEY_DELETE_MUSIC, delete_music); } public void confirmDelete(String desc, final long[] list) { mDeleteConfirm = new AlertDialog.Builder(this).setIcon(android.R.drawable.ic_dialog_alert) .setTitle(R.string.delete).setMessage(getString(R.string.delete_confirm, desc)) .setPositiveButton(android.R.string.ok, this).setNegativeButton(android.R.string.cancel, this) .setOnCancelListener(this).show(); restore_confirm = true; } }