Mega Code Archive
Delete query Track, write play list
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//package com.andrewchatham.pony;
import java.util.ArrayList;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.provider.MediaStore;
import android.util.Log;
// Large parts of this file are cribbed from MusicUtil.java in the android music player.
public class MediaUtil {
public static final String TAG = "MediaUtil";
public static void deleteTrack(Context context, String localPath) {
Uri uri = MediaStore.Audio.Media.getContentUriForPath(localPath);
context.getContentResolver().delete(uri, null, null);
}
public static Cursor query(Context context, Uri uri, String[] projection,
String selection, String[] selectionArgs, String sortOrder, int limit) {
try {
ContentResolver resolver = context.getContentResolver();
if (resolver == null) {
return null;
}
if (limit > 0) {
uri = uri.buildUpon().appendQueryParameter("limit", "" + limit).build();
}
return resolver.query(uri, projection, selection, selectionArgs, sortOrder);
} catch (UnsupportedOperationException ex) {
return null;
}
}
public static Cursor query(Context context, Uri uri, String[] projection,
String selection, String[] selectionArgs, String sortOrder) {
return query(context, uri, projection, selection, selectionArgs, sortOrder, 0);
}
private static int intFromCursor(Cursor c) {
int id = -1;
if (c != null) {
c.moveToFirst();
if (!c.isAfterLast()) {
id = c.getInt(0);
}
}
c.close();
return id;
}
public static int idForplaylist(Context context, String name) {
Cursor c = query(context, MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI,
new String[] { MediaStore.Audio.Playlists._ID },
MediaStore.Audio.Playlists.NAME + "=?",
new String[] { name },
MediaStore.Audio.Playlists.NAME);
return intFromCursor(c);
}
public static int idFortrack(Context context, String path) {
Cursor c = query(context, MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI,
new String[] { MediaStore.Audio.Media._ID },
MediaStore.Audio.Media.DATA + "=?",
new String[] { path },
MediaStore.Audio.Media.DATA);
return intFromCursor(c);
}
public static void writePlaylist(Context context, String playlistName, ArrayList<String> paths) {
ContentResolver resolver = context.getContentResolver();
int playlistId = idForplaylist(context, playlistName);
Uri uri;
if (playlistId == -1) {
ContentValues values = new ContentValues(1);
values.put(MediaStore.Audio.Playlists.NAME, playlistName);
uri = resolver.insert(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, values);
playlistId = idForplaylist(context, playlistName);
} else {
uri = MediaStore.Audio.Playlists.Members.getContentUri("external", playlistId);
}
Log.d(TAG, String.format("Writing playlist %s", uri));
// Delete everything from the old playlist
context.getContentResolver().delete(uri, null, null);
// Add all the new tracks to the playlist.
int size = paths.size();
ContentValues values [] = new ContentValues[size];
for (int k = 0; k < size; ++k) {
values[k] = new ContentValues();
values[k].put(MediaStore.Audio.Playlists.Members.PLAY_ORDER, k);
values[k].put(MediaStore.Audio.Playlists.Members.AUDIO_ID, idFortrack(context, paths.get(k)));
}
resolver.bulkInsert(uri, values);
}
}
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