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就像標題一樣,我對此感到困惑。例如:爲什麼在使用光標時應該調用cursor.moveToFirst()?
Uri contactData = data.getData();
String [] projection ={Phone.NUMBER};
Cursor c = getContentResolver().query(contactData, projection, null, null, null);
c.moveToFirst();
int column = c.getColumnIndex(Phone.NUMBER);
String num = c.getString(column);