Android:SQLite - Querying an Array in SelectionArgs as well as other string values

Question

I had the following code for Content Resolver Query:

String selection = Columns.NAME + \"=? and \" + Columns.AVAILABILITY + \"=?\";
String[] selectionArgs = { na         


        

Answer 1

SQL has the IN operator for this:

String selection = Columns.NAME + " IN (?,?,?) AND" +
                   Columns.Availability + " = ?";
String[] selectionArgs = { name[0], name[1], name[2], true };
...

---

If the array size is not predetermined, you have to construct the selection string and the selectionArgs array dynamically:

String selection = Columns.NAME + " IN (" + makePlaceholders(names.length) + ")" +
                   " AND " + Columns.Availability + " = ?";
String[] selectionArgs = new String[names.length + 1];
for (int i = 0; i < names.length; i++)
    selectionArgs[i] = names[i];
selectionArgs[names.length] = true;
...

with the function makePlaceholders copied from this answer:

String makePlaceholders(int len) {
    StringBuilder sb = new StringBuilder(len * 2 - 1);
    sb.append("?");
    for (int i = 1; i < len; i++)
        sb.append(",?");
    return sb.toString();
}