I have a databse that contains: id , playlistname , playlistnum and I want to get alll the rows where playlistname = "CoolPlaylist" and I want to parse them 1 by 1, so I thought of doing this:

String name = "CoolPlaylist"; 
String[] columns = String[] {id , playlistname , playlistnum};
Cursor c = myDatabase.query(TABLE_NAME, columns, key_playlistname +"="+name,
                            null, null, null, null);

but when I do this, the code crashes. Does somebody know what the problem probably is?


closed as off topic by user744, Tetrad Jul 16 '12 at 4:08

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  • 3
    \$\begingroup\$ I guessing it's something to do with those nulls. You need to debug the program. Read the error message, they're typically very helpful. Use the debugger, step through the code, ensure your values are set the way you expect them to be set. \$\endgroup\$ – MichaelHouse Jul 15 '12 at 15:13

This portion of your code

key_playlistname +"="+name

probably needs the name part in quotes


key_playlistname + "= '" + name + "'"

Otherwise CoolPlayList probably be treated as an SQL command and would come back with an error such as invalid SQL statement.


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