Panos Panos - 1 year ago 113
Android Question

Read file As String

I need to load an xml file as String in android so I can load it to TBXML xml parser library and parse it. The implementation I have now to read the file as String takes around 2seconds even for a very small xml file of some KBs. Is there any known fast method that can read a file as string in Java/Android?

This is the code I have now:

public static String readFileAsString(String filePath) {
String result = "";
File file = new File(filePath);
if ( file.exists() ) {
//byte[] buffer = new byte[(int) new File(filePath).length()];
FileInputStream fis = null;
try {
//f = new BufferedInputStream(new FileInputStream(filePath));

fis = new FileInputStream(file);
char current;
while (fis.available() > 0) {
current = (char);
result = result + String.valueOf(current);
} catch (Exception e) {
Log.d("TourGuide", e.toString());
} finally {
if (fis != null)
try {
} catch (IOException ignored) {
//result = new String(buffer);
return result;

Answer Source

The code finally used is the following from:

public static String convertStreamToString(InputStream is) throws Exception {
    BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    StringBuilder sb = new StringBuilder();
    String line = null;
    while ((line = reader.readLine()) != null) {
    return sb.toString();

public static String getStringFromFile (String filePath) throws Exception {
    File fl = new File(filePath);
    FileInputStream fin = new FileInputStream(fl);
    String ret = convertStreamToString(fin);
    //Make sure you close all streams.
    return ret;
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