add Song To Playlist - Android Media

Description

add Song To Playlist
Demo Code

/*//from   w  w  w  .  j ava  2 s.  c o  m
 * Copyright (C) 2008 The Android Open Source 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.
 */
import android.app.Activity;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.content.ContextWrapper;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.res.Resources;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Environment;
import android.os.ParcelFileDescriptor;
import android.os.RemoteException;
import android.provider.MediaStore;
import android.provider.Settings;
import android.text.TextUtils;
import android.text.format.Time;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SubMenu;
import android.view.View;
import android.view.Window;
import android.widget.TabWidget;
import android.widget.TextView;
import android.widget.Toast;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Formatter;
import java.util.HashMap;
import java.util.Locale;

public class Main{
    private static ContentValues[] sContentValuesCache = null;
    public static void addToPlaylist(Context context, long[] ids,
            long playlistid) {
        if (ids == null) {
            // this shouldn't happen (the menuitems shouldn't be visible
            // unless the selected item represents something playable
            Log.e("MusicBase", "ListSelection null");
        } else {
            int size = ids.length;
            ContentResolver resolver = context.getContentResolver();
            // need to determine the number of items currently in the playlist,
            // so the play_order field can be maintained.
            String[] cols = new String[] { "count(*)" };
            Uri uri = MediaStore.Audio.Playlists.Members.getContentUri(
                    "external", playlistid);
            Cursor cur = resolver.query(uri, cols, null, null, null);
            cur.moveToFirst();
            int base = cur.getInt(0);
            cur.close();
            int numinserted = 0;
            for (int i = 0; i < size; i += 1000) {
                makeInsertItems(ids, i, 1000, base);
                numinserted += resolver
                        .bulkInsert(uri, sContentValuesCache);
            }
            String message = context.getResources()
                    .getQuantityString(R.plurals.NNNtrackstoplaylist,
                            numinserted, numinserted);
            Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
            //mLastPlaylistSelected = playlistid;
        }
    }
    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);
    }
    /**
     * @param ids The source array containing all the ids to be added to the playlist
     * @param offset Where in the 'ids' array we start reading
     * @param len How many items to copy during this pass
     * @param base The play order offset to use for this pass
     */
    private static void makeInsertItems(long[] ids, int offset, int len,
            int base) {
        // adjust 'len' if would extend beyond the end of the source array
        if (offset + len > ids.length) {
            len = ids.length - offset;
        }
        // allocate the ContentValues array, or reallocate if it is the wrong size
        if (sContentValuesCache == null
                || sContentValuesCache.length != len) {
            sContentValuesCache = new ContentValues[len];
        }
        // fill in the ContentValues array with the right values for this pass
        for (int i = 0; i < len; i++) {
            if (sContentValuesCache[i] == null) {
                sContentValuesCache[i] = new ContentValues();
            }

            sContentValuesCache[i].put(
                    MediaStore.Audio.Playlists.Members.PLAY_ORDER, base
                            + offset + i);
            sContentValuesCache[i].put(
                    MediaStore.Audio.Playlists.Members.AUDIO_ID, ids[offset
                            + i]);
        }
    }
}
add Song To Playlist - Android Media

Description

Demo Code

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