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fix crash upgrading from beta 30 (which is two years old!)

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This commit is contained in:
Eric House 2013-08-07 23:36:17 -07:00
parent b33991486c
commit 6bb2a9bb9a
1 changed files with 14 additions and 4 deletions
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16
xwords4/android/XWords4/src/org/eehouse/android/xw4/DBHelper.java
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@ -309,9 +309,19 @@ public class DBHelper extends SQLiteOpenHelper {
if ( null != columnNames ) {
ArrayList<String> oldCols =
new ArrayList<String>( Arrays.asList( columnNames ) );
String[] newColNames = DBUtils.getColumns( db, name );
ArrayList<String> newCols =
new ArrayList<String>( Arrays.asList( newColNames ) );
// Make a list of columns in the new DB, using it to
// remove from the old list any that aren't in the
// new. Old tables may have column names we no longer
// use, but we can't try to copy them because the new
// doesn't have 'em. Note that calling getColumns() on
// the newly-created table doesn't work, perhaps
// because we're in a transaction and nothing's been
// committed.
ArrayList<String> newCols = new ArrayList<String>();
for ( int ii = 0; ii < data.length; ii += 2 ) {
newCols.add( data[ii] );
}
oldCols.retainAll( newCols );
String cols = TextUtils.join( ",", oldCols );