如何检查j2me中rms中的第一个值是否为空？

发布于 2024-10-18 23:33:15 字数 690 浏览 5 评论 0原文

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();

在这里我想检查 rms 是否包含第一个值，否则它将在其中输入新值？？？但我仍然有点困惑，信息是否会在移动设备中永久保留......

原文

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...

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

咋地 2024-10-25 23:33:15

永久存储在 RMS 中的信息我们已经讨论过这一点。
请参阅此示例代码并尝试如下操作，

    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 {
    ...
     }
    }

更新

请参阅这些链接以供参考，

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 {
    ...
     }
    }

Updates

See these links for your reference,

回复收藏 0 原文

~没有更多了~