Example usage for android.content ContentQueryMap ContentQueryMap

Introduction

In this page you can find the example usage for android.content ContentQueryMap ContentQueryMap.

Prototype

public ContentQueryMap(Cursor cursor, String columnNameOfKey, boolean keepUpdated,
        Handler handlerForUpdateNotifications) 

Source Link

Document

Creates a ContentQueryMap that caches the content backing the cursor

Usage

From source file:com.andrew.apolloMod.helpers.AddIdCursorLoader.java

@Override
public Cursor loadInBackground() {

    Cursor mediaCursor = getContext().getContentResolver().query(mUri, mProjection, mSelection, mSelectionArgs,
            mSortOrder);/*from  w  ww.  ja  va2  s .co m*/
    //Get cursor filled with Audio Id's
    String[] projection = new String[] { BaseColumns._ID, AlbumColumns.ALBUM };
    Uri uri = Audio.Albums.EXTERNAL_CONTENT_URI;
    String sortOrder = Audio.Albums.DEFAULT_SORT_ORDER;
    Cursor albumCursor = getContext().getContentResolver().query(uri, projection, null, null, sortOrder);

    //Matrix cursor to hold final data to be returned to calling context
    MatrixCursor cursor = new MatrixCursor(new String[] { BaseColumns._ID, MediaColumns.TITLE,
            AudioColumns.ARTIST, AudioColumns.ALBUM, AudioColumns.ALBUM_ID });
    //Map data from Audio Id cursor to the ALbumName Colum
    ContentQueryMap mQueryMap = new ContentQueryMap(albumCursor, AlbumColumns.ALBUM, false, null);

    Map<String, ContentValues> data = mQueryMap.getRows();
    if (mediaCursor != null) {
        while (mediaCursor.moveToNext()) {
            String id = mediaCursor.getString(mediaCursor.getColumnIndexOrThrow(BaseColumns._ID));
            String title = mediaCursor.getString(mediaCursor.getColumnIndexOrThrow(MediaColumns.TITLE));
            String artist = mediaCursor.getString(mediaCursor.getColumnIndexOrThrow(AudioColumns.ARTIST));
            String album = mediaCursor.getString(mediaCursor.getColumnIndexOrThrow(AudioColumns.ALBUM));

            ContentValues tData = data.get(album);
            String albumid = (String) tData.get(BaseColumns._ID);
            cursor.addRow(new String[] { id, title, artist, album, albumid });
        }
        mediaCursor.close();
    }

    if (cursor != null) {
        // Ensure the cursor window is filled
        registerContentObserver(cursor, mObserver);
    }
    return cursor;
}

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