CreatePlaylist.java revision 6cb8bc92e0ca524a76a6fa3f6814b43ea9a3b30d 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.music;
18
19import android.app.Activity;
20import android.content.ContentResolver;
21import android.content.ContentUris;
22import android.content.ContentValues;
23import android.content.Intent;
24import android.database.Cursor;
25import android.media.AudioManager;
26import android.net.Uri;
27import android.os.Bundle;
28import android.provider.MediaStore;
29import android.text.Editable;
30import android.text.TextWatcher;
31import android.util.Log;
32import android.view.KeyEvent;
33import android.view.View;
34import android.view.Window;
35import android.view.WindowManager;
36import android.widget.Button;
37import android.widget.EditText;
38import android.widget.TextView;
39
40public class CreatePlaylist extends Activity
41{
42    private EditText mPlaylist;
43    private TextView mPrompt;
44    private Button mSaveButton;
45
46    @Override
47    public void onCreate(Bundle icicle) {
48        super.onCreate(icicle);
49        setVolumeControlStream(AudioManager.STREAM_MUSIC);
50
51        requestWindowFeature(Window.FEATURE_NO_TITLE);
52        setContentView(R.layout.create_playlist);
53        getWindow().setLayout(WindowManager.LayoutParams.FILL_PARENT,
54                                    WindowManager.LayoutParams.WRAP_CONTENT);
55
56        mPrompt = (TextView)findViewById(R.id.prompt);
57        mPlaylist = (EditText)findViewById(R.id.playlist);
58        mSaveButton = (Button) findViewById(R.id.create);
59        mSaveButton.setOnClickListener(mOpenClicked);
60
61        ((Button)findViewById(R.id.cancel)).setOnClickListener(new View.OnClickListener() {
62            public void onClick(View v) {
63                finish();
64            }
65        });
66
67        String defaultname = icicle != null ? icicle.getString("defaultname") : makePlaylistName();
68        String promptformat = getString(R.string.create_playlist_create_text_prompt);
69        String prompt = String.format(promptformat, defaultname);
70        mPrompt.setText(prompt);
71        mPlaylist.setText(defaultname);
72        mPlaylist.setSelection(defaultname.length());
73        mPlaylist.addTextChangedListener(mTextWatcher);
74    }
75
76    TextWatcher mTextWatcher = new TextWatcher() {
77        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
78            // don't care about this one
79        }
80        public void onTextChanged(CharSequence s, int start, int before, int count) {
81            // check if playlist with current name exists already, and warn the user if so.
82            if (idForplaylist(mPlaylist.getText().toString()) >= 0) {
83                mSaveButton.setText(R.string.create_playlist_overwrite_text);
84            } else {
85                mSaveButton.setText(R.string.create_playlist_create_text);
86            }
87        };
88        public void afterTextChanged(Editable s) {
89            // don't care about this one
90        }
91    };
92
93    private int idForplaylist(String name) {
94        Cursor c = MusicUtils.query(this, MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI,
95                new String[] { MediaStore.Audio.Playlists._ID },
96                MediaStore.Audio.Playlists.NAME + "=?",
97                new String[] { name },
98                MediaStore.Audio.Playlists.NAME);
99        int id = -1;
100        if (c != null) {
101            c.moveToFirst();
102            if (!c.isAfterLast()) {
103                id = c.getInt(0);
104            }
105        }
106        c.close();
107        return id;
108    }
109
110    @Override
111    public void onSaveInstanceState(Bundle outcicle) {
112        outcicle.putString("defaultname", mPlaylist.getText().toString());
113    }
114
115    @Override
116    public void onResume() {
117        super.onResume();
118    }
119
120    private String makePlaylistName() {
121
122        String template = getString(R.string.new_playlist_name_template);
123        int num = 1;
124
125        String[] cols = new String[] {
126                MediaStore.Audio.Playlists.NAME
127        };
128        ContentResolver resolver = getContentResolver();
129        String whereclause = MediaStore.Audio.Playlists.NAME + " != ''";
130        Cursor c = resolver.query(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI,
131            cols, whereclause, null,
132            MediaStore.Audio.Playlists.NAME);
133
134        String suggestedname;
135        suggestedname = String.format(template, num++);
136
137        // Need to loop until we've made 1 full pass through without finding a match.
138        // Looping more than once shouldn't happen very often, but will happen if
139        // you have playlists named "New Playlist 1"/10/2/3/4/5/6/7/8/9, where
140        // making only one pass would result in "New Playlist 10" being erroneously
141        // picked for the new name.
142        boolean done = false;
143        while (!done) {
144            done = true;
145            c.moveToFirst();
146            while (! c.isAfterLast()) {
147                String playlistname = c.getString(0);
148                if (playlistname.compareToIgnoreCase(suggestedname) == 0) {
149                    suggestedname = String.format(template, num++);
150                    done = false;
151                }
152                c.moveToNext();
153            }
154        }
155        c.close();
156        return suggestedname;
157    }
158
159    private View.OnClickListener mOpenClicked = new View.OnClickListener() {
160        public void onClick(View v) {
161            String name = mPlaylist.getText().toString();
162            if (name != null && name.length() > 0) {
163                ContentResolver resolver = getContentResolver();
164                int id = idForplaylist(name);
165                Uri uri;
166                if (id >= 0) {
167                    uri = ContentUris.withAppendedId(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, id);
168                    MusicUtils.clearPlaylist(CreatePlaylist.this, id);
169                } else {
170                    ContentValues values = new ContentValues(1);
171                    values.put(MediaStore.Audio.Playlists.NAME, name);
172                    uri = resolver.insert(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, values);
173                }
174                setResult(RESULT_OK, (new Intent()).setAction(uri.toString()));
175                finish();
176            }
177        }
178    };
179}
180