Problem Reading Saved File : Android
I am read & write username & password to android device using my application to internal storage. I am successful writing to the device, but while reading I get error. On start of the aplication I read that file and I get **"The applicaton (...) has stopped unexpectedly. Please try again."** with "Force Close" button and the app closes. I tried different ways to read, but all showed same results. I write my data as username + "\n" + passwrd + "\n". This is the code for reading data :

    	private static String ReadFromFile(String fileName) {
		String text = "";
		FileInputStream fis = null;
		byte[] fileData;
		try {
			StringBuffer sb = new StringBuffer();
			int c = 0;
			fis = AppContext.openFileInput(fileName);
			fileData = new byte[fis.available()];
			java.util.StringTokenizer stk = new java.util.StringTokenizer(new String(fileData), "\n");
			if (fis.available() != 0) {
				text = stk.toString();
			}
			/*
			c = (char)fis.read();
			while (c != -1){
				if (c != -1)
					sb.append(c);
				c = (char)fis.read();
			}
			text = sb.toString();
			*/
			fis.close();			
		} catch (FileNotFoundException e) {
			text = "null " +  e.getMessage();
		} catch (IOException e) {
			text = "null " + e.getMessage();
		} finally {
			fis = null;
		}	
		return text;
	}

    	/*
		try {
			StringBuffer sb = new StringBuffer();
			RandomAccessFile raf = new RandomAccessFile(ENC_LOGIN_FILE, "r");
			while ((str1 = raf.readLine()) != null){
				sb.append(str1);
			}
			str1 = sb.toString();
		} catch (FileNotFoundException e) {
			errorMessage = "File Not Found: " + e.getMessage();
			//e.printStackTrace();
		} catch (IOException ioe) {
			errorMessage = "IOExcp: " + ioe.getMessage();
			//e.printStackTrace();
		}*/

No path is used and the filename directly is given to write & read file. I checked out http://stackoverflow.com/questions/3037037/problem-facing-in-reading-file-from-internal-memory-of-android from where I tried StringTokenizer. 

Can anyone help me know where am I going wrong. The following permission are set :

        <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS"></uses-permission>
    <uses-permission android:name="android.permission.WRITE_SETTINGS"></uses-permission>
    <uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS"></uses-permission>
    <uses-permission android:name="android.permission.READ_SYNC_SETTINGS"></uses-permission>    
    <uses-permission android:name="android.permission.READ_SYNC_STATS"></uses-permission>
    <uses-permission android:name="android.permission.READ_LOGS"></uses-permission>


Also how do I debug the application. How to check the data written in Log. If I use SOP, where does it dispaly - it doesn't display in Console window ? Please help me, I am n newbie in android development.
One more thing to clarify : My motto is to store username and password in such a way that user must not be able to read them directly. I have already used MODE_PRIMITIVE. Is their a need to use JSONObject to save this data. I had a look at JSON in couple of sites & API but couldn't make out why and  where it should be used. Using MODE_PRIMITIVE I believe even the user can't read the file. Only my application can read it. Then I don't think I should use JSON. Please correct me if I am wrong.

Any help is highly appreciated.

Thanks.
Problem Reading Saved File : Android
===

I am read & write username & password to android device using my application to internal storage. I am successful writing to the device, but while reading I get error. On start of the aplication I read that file and I get **"The applicaton (...) has stopped unexpectedly. Please try again."** with "Force Close" button and the app closes. I tried different ways to read, but all showed same results. I write my data as username + "\n" + passwrd + "\n". This is the code for reading data :

    	private static String ReadFromFile(String fileName) {
		String text = "";
		FileInputStream fis = null;
		byte[] fileData;
		try {
			StringBuffer sb = new StringBuffer();
			int c = 0;
			fis = AppContext.openFileInput(fileName);
			fileData = new byte[fis.available()];
			java.util.StringTokenizer stk = new java.util.StringTokenizer(new String(fileData), "\n");
			if (fis.available() != 0) {
				text = stk.toString();
			}
			/*
			c = (char)fis.read();
			while (c != -1){
				if (c != -1)
					sb.append(c);
				c = (char)fis.read();
			}
			text = sb.toString();
			*/
			fis.close();			
		} catch (FileNotFoundException e) {
			text = "null " +  e.getMessage();
		} catch (IOException e) {
			text = "null " + e.getMessage();
		} finally {
			fis = null;
		}	
		return text;
	}

    	/*
		try {
			StringBuffer sb = new StringBuffer();
			RandomAccessFile raf = new RandomAccessFile(ENC_LOGIN_FILE, "r");
			while ((str1 = raf.readLine()) != null){
				sb.append(str1);
			}
			str1 = sb.toString();
		} catch (FileNotFoundException e) {
			errorMessage = "File Not Found: " + e.getMessage();
			//e.printStackTrace();
		} catch (IOException ioe) {
			errorMessage = "IOExcp: " + ioe.getMessage();
			//e.printStackTrace();
		}*/

No path is used and the filename directly is given to write & read file. I checked out http://stackoverflow.com/questions/3037037/problem-facing-in-reading-file-from-internal-memory-of-android from where I tried StringTokenizer. 

Can anyone help me know where am I going wrong. The following permission are set :

        <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS"></uses-permission>
    <uses-permission android:name="android.permission.WRITE_SETTINGS"></uses-permission>
    <uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS"></uses-permission>
    <uses-permission android:name="android.permission.READ_SYNC_SETTINGS"></uses-permission>    
    <uses-permission android:name="android.permission.READ_SYNC_STATS"></uses-permission>
    <uses-permission android:name="android.permission.READ_LOGS"></uses-permission>


Also how do I debug the application. How to check the data written in Log. If I use SOP, where does it dispaly - it doesn't display in Console window ? Please help me, I am n newbie in android development.
One more thing to clarify : My motto is to store username and password in such a way that user must not be able to read them directly. I have already used MODE_PRIMITIVE. Is their a need to use JSONObject to save this data. I had a look at JSON in couple of sites & API but couldn't make out why and  where it should be used. Using MODE_PRIMITIVE I believe even the user can't read the file. Only my application can read it. Then I don't think I should use JSON. Please correct me if I am wrong.

Any help is highly appreciated.

Thanks.