Android won't write new line in text file
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26-10-2019 - |
Question
I am trying to write a new line to a text file in android.
Here is my code:
FileOutputStream fOut;
try {
String newline = "\r\n";
fOut = openFileOutput("cache.txt", MODE_WORLD_READABLE);
OutputStreamWriter osw = new OutputStreamWriter(fOut);
osw.write(data);
osw.write(newline);
osw.flush();
osw.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
I have tried \n
, \r\n
and I did also try to get the system property for a new line, neither of them work.
The data variable contains previously data from the same file.
String data = "";
try {
FileInputStream in = openFileInput("cache.txt");
StringBuffer inLine = new StringBuffer();
InputStreamReader isr = new InputStreamReader(in, "ISO8859-1");
BufferedReader inRd = new BufferedReader(isr,8 * 1024);
String text;
while ((text = inRd.readLine()) != null) {
inLine.append(text);
}
in.close();
data = inLine.toString();
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Solution
I executed a similar program and it worked for me. I observed a strange behavior though. It added those new lines to the file, however the cursor remained at the first line. If you want to verify, write a String
after your newline characters, you will see that the String
is written just below those new lines.
OTHER TIPS
I had the same problems, tried every trick in the book.
My problem: the newline's were written, but while reading they were removed:
while (readString != null) {
datax.append(readString);
readString = buffreader.readLine();
}
The file was read line by line and concatenated, so the newline's disappeared.
I did not look at the original file in Notepad or something because I didn't know where to look on my phone, and my logscreen used the code which removed the newline's :-(
So the simple soultion was to put it back while reading:
while (readString != null) {
datax.append(readString);
datax.append("\n");
readString = buffreader.readLine();
}
I was having the same problem and was unable to write a newline. Instead I use BufferdWritter to write a new line into the file and it works for me. Here is a sample code sniplet:
OutputStreamWriter out = new OutputStreamWriter(openFileOutput("cache.txt",0));
BufferedWriter bwriter = new BufferedWriter(out);
// write the contents to the file
bwriter.write("Input String"); //Enter the string here
bwriter.newLine();