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Android Android Data Persistence CRUD Operations with SQLite Updating Existing Data

Posted by MUZ140028 Charlton Sibanda
MUZ140028 Charlton Sibanda
5,615 Points

anyone to help

Once again, assume you have a variable named 'database'. Update the database using the 'values' and 'clause' variables and "PETS_TABLE" as the table name.

CodeChallenge.java 
ContentValues values = new ContentValues();
values.put("name", "Rover");
values.put("type", "cat");
values.put("breed", "grumpy");

String clause = String.format("%s=%s", "name","Rover" /* add param here */);

/* Add your code here! 
 * Assume you already have a variable named 'database'.
 */

database.update(PETS_TABLE,values,String.format("%s=%s", "name","Rover"));
MUZ140028 Charlton Sibanda
MUZ140028 Charlton Sibanda
5,615 Points

i clicked best answer by mistake there...would you please just show what you are saying

mrben
mrben
8,068 Points

Well I think my answer did solve your original problem and now you have a new problem :-). I've commented below showing you how to fix the new problem.

MUZ140028 Charlton Sibanda
MUZ140028 Charlton Sibanda
5,615 Points

i still do not get it...the answer you gave didnt solve the problem mrben.....can you please show me the correct way

MUZ140028 Charlton Sibanda
MUZ140028 Charlton Sibanda
5,615 Points

thanks..it solved it now

2 Answers

mrben
mrben
8,068 Points
mrben
mrben
8,068 Points

Try this:

database.update("PETS_TABLE", values, String.format("%s=%s", "name","Rover"), null);
mrben
mrben
8,068 Points
mrben
mrben
8,068 Points

I think that you might need to put PETS_TABLE in quotes, i.e. "PETS_TABLE".

If that's not it, what error are you getting?

MUZ140028 Charlton Sibanda
MUZ140028 Charlton Sibanda
5,615 Points

if i put it in quotes...i get the following JavaTester.java:44: error: method update in class SQLiteDatabase cannot be applied to given types;

database.update("PETS_TABLE",values,String.format("%s=%s", "name","Rover")); ^ required: String,ContentValues,String,String[]

found: String,ContentValues,String

reason: actual and formal argument lists differ in length 1 error

mrben
mrben
8,068 Points

This is likely a different error to the one you were seeing before.

It means you're missing an argument in the call to database.update. You're passing 3 arguments and 4 are required. The last one is a string array. However, in this instance you probably just need to pass null.

Search for "public int update" on http://developer.android.com/reference/android/database/sqlite/SQLiteDatabase.html.