If you want to save youre settings or other data, here is a example to write to and read from a file.
The file is private for the application, so isn't accessible for other apps or the user.

To write some string data to the device:


to read the same settings:


How to use the write method:


How to read the settings (put in a array for easier use):


Cheers

thank you, this is very helpful, but where does the settings.dat file get saved? how can I view it?

pwhisler wrote:thank you, this is very helpful, but where does the settings.dat file get saved? how can I view it?

/data/data/PACKAGE_NAME/files/settings.dat

I put the code above in my class that extends Activity, and it seems to work, I get the toast message that it read and wrote the file, but my data folder is empty... it doesn't have the second data folder or anything else in it...

pwhisler wrote:I put the code above in my class that extends Activity, and it seems to work, I get the toast message that it read and wrote the file, but my data folder is empty... it doesn't have the second data folder or anything else in it...

oh i see, this works for the emulator, but how about on the actual device? or does it not matter, as long as it works on the emulator it will work on the device?

because i was running this off the G1 and my data folder was empty...

pwhisler wrote:oh i see, this works for the emulator, but how about on the actual device? or does it not matter, as long as it works on the emulator it will work on the device?

When it works on the emulator it is supposed to work on a real device, though there are a lot of case where this isn't true, so you should have one test every app on a real device (actually you should anyway).

Hello Experts,

Is there a way to write and read a file outside the Application path?

Regards,
Nagarajan T.

Ya u can do :



package com.saamy.net;
import java.io.IOException;
import java.io.InputStream;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class AndroidUI extends Activity
{
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
try {
InputStream is = getAssets().open("lan.txt");
int size = is.available();
byte[] buffer = new byte[size];
is.read(buffer);
is.close();
String text = new String(buffer);
long x = 1000;

TextView tv = (TextView)findViewById(R.id.tv);
tv.setText(text);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}

IS there any answer to tnagarajan' s question?

i used the code that you gave and it worked great...but could you please tell me how can I open the file in apend mode.

Assalamu elaikum.

how can we write/read data to/from phone internal memory, but this will not be a private folder of an application. Simply I want to write file to /data/data/myFile.xml , Also want to read from file stored in /data/data/


Please help me.

Allah Hafiz

sparlay_pk wrote:Assalamu elaikum.

how can we write/read data to/from phone internal memory, but this will not be a private folder of an application. Simply I want to write file to /data/data/myFile.xml , Also want to read from file stored in /data/data/


Please help me.

Allah Hafiz

^^ this.

where do you put the

String data[] = ReadSettings(this).split(",");

i keep getting errors, it doesnt like going to and from an array. and i assume i remove the data = null

by reading the settings.dat you put in this line of code:

char[] inputBuffer = new char[255];

that stops the reading after 255 chars...
what about if i need to read a file for which i don't know the fixed lenght?
how to modify the above to function properly?
thanks!

is there any chance to save it elswhere ? for example in /mnt/sdcard ??