how to check first value in rms is null in j2me?
Frage
RecordStore rs = RecordStore.openRecordStore("StoryDataBase1",true);
String data_to_write_in_file = Slug.getString()+"^"+title.getString()+"^"+Body.getString()+"^"+com.editorial.Main.MainImagePath+"^"+com.editorial.Main.MainVideoPath+"^"+com.editorial.Main.MainVoicePath+"$";
byte b[] = rs.getRecord(1);
String str = new String(b,0,b.length);
if(str.equals("")) {
byte bytes[] = data_to_write_in_file.getBytes();
rs.addRecord(bytes,0,bytes.length);
}
else
{
str=str+data_to_write_in_file;
byte[] data = str.getBytes();
rs.setRecord(1, data, 0, data.length);
}
rs.closeRecordStore();
in this i want to check whether rms contains first value or not, otherwise it will enter new value in it??? But i am still little bit confused that whether information going to stay permanent in mobile or not...
Lösung
An information permanently stored in RMS and We are already discussed regards this. See this sample code and try like this,
byte[] recData = null;
int len;
RecordStore rs = RecordStore.openRecordStore("StoryDataBase1", true);
if (rs.getNumRecords() > 0) {
recData = new byte[rs.getRecordSize(1)];
len = rs.getRecord(1, recData, 0);
String value = new String(recData, 0, len);
if(value == null) {
....
} else {
...
}
}
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