读取和写入记录存储中的问题 [英] problem in reading and writing into a recordstore
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问题描述
但是我不工作,我也不知道为什么
有人可以帮我吗
public class TopList {
无效 writeToDisk(字符串 recordstr)抛出 IOException {
尝试 {
RecordStore ExpenseRecord = RecordStore.openRecordStore(" ,true);
// 创建输出流
ByteArrayOutputStream baos = 新 ByteArrayOutputStream();
DataOutputStream os = 新 DataOutputStream(baos);
// 要保存到输出流中的文字值
os.writeUTF(recordstr);
// 关闭流
os.close();
字节 [] data = baos.toByteArray();
// 将记录写入记录存储
int id = ExpenseRecord.addRecord(data, 0 ,data.length);
// 关闭记录存储
ExpenseRecord.closeRecordStore();
} 捕获(例如RecordStoreFullException){
ex.printStackTrace();
} 捕获(前RecordStoreNotFoundException){
ex.printStackTrace();
} 捕获(ex RecordStoreException ex){
ex.printStackTrace();
}
}
字符串 readFromDisk( int RecordID)抛出 IOException {
布尔 flag = true;
字符串 recordstr = null;
同时(标志){
尝试 {
RecordStore ExpenseRecord = RecordStore.openRecordStore(" ,false);
字节 [] data = ExpenseRecord.getRecord(RecordID);
标志=假;
DataInputStream是= 新 DataInputStream(新 ByteArrayInputStream(data));
recordstr = is.readUTF();
is.close();
ExpenseRecord.closeRecordStore();
} 捕获(例如RecordStoreFullException){
ex.printStackTrace();
} 捕获(前RecordStoreNotFoundException){
ex.printStackTrace();
} 捕获(例如,InvalidRecordIDException){
} 捕获(ex RecordStoreException ex){
ex.printStackTrace();
}
}
返回 recordstr;
}
}
解决方案
公共字符串[] readDeviceDetailById(int id,RecordStore rcs){
字符串devId = null;
字符串SwitchID = null;
字符串devStatusOnOff = null;
字符串ru = null;
字符串timer = null;
字符串出现次数=空;
字符串onTime = null;
字符串aOn = null;
字符串offTime = null;
字符串aOff = null;
字符串devtag = null;
字符串pic = null;
字符串Swtag = null;
尝试{
byte [] byteInputData =新的byte [100];
ByteArrayInputStream dInput =新的ByteArrayInputStream(byteInputData);
DataInputStream inputDataStream =新的DataInputStream(dInput);
rcs.getRecord(id,byteInputData,0);
devId = inputDataStream.readUTF();
SwitchID = inputDataStream.readUTF();
devStatusOnOff = inputDataStream.readUTF();
ru = inputDataStream.readUTF();
timer = inputDataStream.readUTF();
发生= inputDataStream.readUTF();
onTime = inputDataStream.readUTF();
aOn = inputDataStream.readUTF();
offTime = inputDataStream.readUTF();
aOff = inputDataStream.readUTF();
图片= inputDataStream.readUTF();
devtag = inputDataStream.readUTF();
Swtag = inputDataStream.readUTF();
dInput.close();
inputDataStream.close();
} catch(IOException ex){
//ex.printStackTrace();
Dialog.show("Exception","IO Exception!" + ex.toString(),"OK",null);
} catch(RecordStoreNotFoundException ex){
//ex.printStackTrace();
Dialog.show("Exception",找不到记录存储异常!" + ex.toString(),"OK",null);
} catch(RecordStoreException ex){
//ex.printStackTrace();
Dialog.show("Exception","Record Store Exception!" + ex.toString(),"OK",null);
}
返回新的String [] {devId,SwitchID,devStatusOnOff,ru,timer,occurrance,onTime,aOn,offTime,aOff,pic,devtag,Swtag};
}
这是一项完整的工作,将其传递给RecordStore对象和一条记录的ID,然后可以正常工作了,它已经过测试
感谢n问候
Om Parkash
hi
i write this class that have two methods,writeToDisk for write into recordstore and readFromDisk to read from a recordstore,
but i doesn''t work and i don''t know why
can anybody help me
public class TopList {
void writeToDisk(String recordstr) throws IOException {
try {
RecordStore ExpenseRecord = RecordStore.openRecordStore("TopScore", true);
//Creating output streams
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream os = new DataOutputStream(baos);
//Writing value to be saved to output stream
os.writeUTF(recordstr);
//close stream
os.close();
byte[] data = baos.toByteArray();
//Write the record to the record store
int id = ExpenseRecord.addRecord(data, 0, data.length);
//Close Record store
ExpenseRecord.closeRecordStore();
} catch (RecordStoreFullException ex) {
ex.printStackTrace();
} catch (RecordStoreNotFoundException ex) {
ex.printStackTrace();
} catch (RecordStoreException ex) {
ex.printStackTrace();
}
}
String readFromDisk(int RecordID) throws IOException {
boolean flag = true;
String recordstr=null;
while (flag) {
try {
RecordStore ExpenseRecord = RecordStore.openRecordStore("TopScore", false);
byte[] data = ExpenseRecord.getRecord(RecordID);
flag = false;
DataInputStream is = new DataInputStream(new ByteArrayInputStream(data));
recordstr = is.readUTF();
is.close();
ExpenseRecord.closeRecordStore();
} catch (RecordStoreFullException ex) {
ex.printStackTrace();
} catch (RecordStoreNotFoundException ex) {
ex.printStackTrace();
} catch (InvalidRecordIDException ex) {
} catch (RecordStoreException ex) {
ex.printStackTrace();
}
}
return recordstr;
}
}
解决方案
public String[] readDeviceDetailById(int id,RecordStore rcs){
String devId=null;
String SwitchID = null;
String devStatusOnOff=null;
String ru=null;
String timer=null;
String occurance=null;
String onTime=null;
String aOn=null;
String offTime=null;
String aOff=null;
String devtag=null;
String pic=null;
String Swtag = null;
try {
byte[] byteInputData = new byte[100];
ByteArrayInputStream dInput = new ByteArrayInputStream(byteInputData);
DataInputStream inputDataStream = new DataInputStream(dInput);
rcs.getRecord(id,byteInputData,0) ;
devId = inputDataStream.readUTF();
SwitchID = inputDataStream.readUTF();
devStatusOnOff = inputDataStream.readUTF();
ru = inputDataStream.readUTF();
timer=inputDataStream.readUTF();
occurance = inputDataStream.readUTF();
onTime = inputDataStream.readUTF();
aOn = inputDataStream.readUTF();
offTime = inputDataStream.readUTF();
aOff = inputDataStream.readUTF();
pic = inputDataStream.readUTF();
devtag=inputDataStream.readUTF();
Swtag = inputDataStream.readUTF();
dInput.close();
inputDataStream.close();
} catch (IOException ex) {
//ex.printStackTrace();
Dialog.show("Exception","IO Exception!"+ex.toString(),"OK", null);
} catch (RecordStoreNotFoundException ex) {
//ex.printStackTrace();
Dialog.show("Exception","Record Store Not Found Exception!"+ex.toString(),"OK", null);
} catch (RecordStoreException ex) {
//ex.printStackTrace();
Dialog.show("Exception","Record Store Exception!"+ex.toString(),"OK", null);
}
return new String[]{devId,SwitchID,devStatusOnOff,ru,timer,occurance,onTime,aOn,offTime,aOff,pic,devtag,Swtag};
}
hi This is fully work pass it to a RecordStore object and Id of a record then it works fine it is tested
thanks n regards
Om Parkash
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