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POAndroid Cursor - Two floats not adding if they are equal?
 

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  1. POAndroid Cursor - Two floats not adding if they are equal?
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    <p>This is a strange problem, and I hope it has a simple solution. I have a database with encrypted values. I have created a cursor that will go through each of the entries in a table, decrypt the value from the column I need, and add the value to a variable, "total". I want the sum of all of the values in the column. Here is the code:</p> <pre><code>while (c.moveToNext()) { strTotal = c.getString(c.getColumnIndexOrThrow(KEY_TOTAL)); strTotal = sc.decrypt(strTotal); total = Float.valueOf(strTotal) + total; } </code></pre> <p>Now, here's the strange part. Let's suppose I have two values in the database: 2 + 4. After each is decrypted, it will correctly add them: 6. Now, if the values are equal: 2 + 2, for instance, the method returns "2" instead of "4". This happens even if it is off by a decimal (2 + 2.01 = 4.01, but 2 + 2 still outputs 2 for example).</p> <p>Is there something I am missing here? Thanks!</p> <p>EDIT:</p> <p>I've changed the code around just to see if the decryption was the problem and it is still giving me the same result:</p> <pre><code>float total = 0; String strTotal = "10"; while (c.moveToNext()) { try { //strTotal = sc.decrypt(c.getString(c.getColumnIndex(KEY_TOTAL))); total = Float.valueOf(strTotal) + total; } catch (Exception e) { Log.e(TAG, "exception", e); } } </code></pre> <p>This code is returning "10", even though there are 3 entries in the database! It looks like if two rows in the database have the same value in the KEY_TOTAL field, it is returning less results. Here is the query:</p> <pre><code>Cursor c = mDb.query(true, DATABASE_TABLE, new String[] {KEY_TOTAL}, KEY_TYPE + "=" + t, null, null, null, null, null); </code></pre> <p>If I pull the db and open it with a sqlite browser, and SELECT all of the rows, I am getting 3 still, however. </p>
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    1. USAlan Young
    1. USAlan Young
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    1. COjust to make it clear. Do you initialize variable total = 0; before the while() runs ?
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      1. USmt0s
    2. COYep, right above the while statement: float total = 0;
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      1. POAndroid Cursor - Two floats not adding if they are equal?
      1. USAlan Young
    3. COIn my case total = Float.valueOf(strTotal) + total; working perfect. see in the decrypt statement
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      1. POAndroid Cursor - Two floats not adding if they are equal?
      1. USNarendra Pal
 

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