CreatePlaylist.java revision 792a2206a4f05f6bd13fce902d3663892d2947af 
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        if (defaultname == null) {
69            finish();
70            return;
71        }
72        String promptformat = getString(R.string.create_playlist_create_text_prompt);
73        String prompt = String.format(promptformat, defaultname);
74        mPrompt.setText(prompt);
75        mPlaylist.setText(defaultname);
76        mPlaylist.setSelection(defaultname.length());
77        mPlaylist.addTextChangedListener(mTextWatcher);
78    }
79
80    TextWatcher mTextWatcher = new TextWatcher() {
81        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
82            // don't care about this one
83        }
84        public void onTextChanged(CharSequence s, int start, int before, int count) {
85            // check if playlist with current name exists already, and warn the user if so.
86            if (idForplaylist(mPlaylist.getText().toString()) >= 0) {
87                mSaveButton.setText(R.string.create_playlist_overwrite_text);
88            } else {
89                mSaveButton.setText(R.string.create_playlist_create_text);
90            }
91        };
92        public void afterTextChanged(Editable s) {
93            // don't care about this one
94        }
95    };
96
97    private int idForplaylist(String name) {
98        Cursor c = MusicUtils.query(this, MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI,
99                new String[] { MediaStore.Audio.Playlists._ID },
100                MediaStore.Audio.Playlists.NAME + "=?",
101                new String[] { name },
102                MediaStore.Audio.Playlists.NAME);
103        int id = -1;
104        if (c != null) {
105            c.moveToFirst();
106            if (!c.isAfterLast()) {
107                id = c.getInt(0);
108            }
109        }
110        c.close();
111        return id;
112    }
113
114    @Override
115    public void onSaveInstanceState(Bundle outcicle) {
116        outcicle.putString("defaultname", mPlaylist.getText().toString());
117    }
118
119    @Override
120    public void onResume() {
121        super.onResume();
122    }
123
124    private String makePlaylistName() {
125
126        String template = getString(R.string.new_playlist_name_template);
127        int num = 1;
128
129        String[] cols = new String[] {
130                MediaStore.Audio.Playlists.NAME
131        };
132        ContentResolver resolver = getContentResolver();
133        String whereclause = MediaStore.Audio.Playlists.NAME + " != ''";
134        Cursor c = resolver.query(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI,
135            cols, whereclause, null,
136            MediaStore.Audio.Playlists.NAME);
137
138        if (c == null) {
139            return null;
140        }
141
142        String suggestedname;
143        suggestedname = String.format(template, num++);
144
145        // Need to loop until we've made 1 full pass through without finding a match.
146        // Looping more than once shouldn't happen very often, but will happen if
147        // you have playlists named "New Playlist 1"/10/2/3/4/5/6/7/8/9, where
148        // making only one pass would result in "New Playlist 10" being erroneously
149        // picked for the new name.
150        boolean done = false;
151        while (!done) {
152            done = true;
153            c.moveToFirst();
154            while (! c.isAfterLast()) {
155                String playlistname = c.getString(0);
156                if (playlistname.compareToIgnoreCase(suggestedname) == 0) {
157                    suggestedname = String.format(template, num++);
158                    done = false;
159                }
160                c.moveToNext();
161            }
162        }
163        c.close();
164        return suggestedname;
165    }
166
167    private View.OnClickListener mOpenClicked = new View.OnClickListener() {
168        public void onClick(View v) {
169            String name = mPlaylist.getText().toString();
170            if (name != null && name.length() > 0) {
171                ContentResolver resolver = getContentResolver();
172                int id = idForplaylist(name);
173                Uri uri;
174                if (id >= 0) {
175                    uri = ContentUris.withAppendedId(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, id);
176                    MusicUtils.clearPlaylist(CreatePlaylist.this, id);
177                } else {
178                    ContentValues values = new ContentValues(1);
179                    values.put(MediaStore.Audio.Playlists.NAME, name);
180                    uri = resolver.insert(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, values);
181                }
182                setResult(RESULT_OK, (new Intent()).setData(uri));
183                finish();
184            }
185        }
186    };
187}
188