Android Utililty Methods URL Read

if (filename == null) {
    throw new IllegalArgumentException("Filename cannot be null");
URL url = r.getUC().getClass().getClassLoader()
        .getResource(filename);
if (url == null) {
    return null;
try {
    URLConnection connection = url.openConnection();
    connection.setUseCaches(false);
    return connection.getInputStream();
} catch (IOException ex) {
    r.log("Could not save " + filename);
return null;

String result = "";
try {
    BufferedReader in = new BufferedReader(new InputStreamReader(
            url.openStream()));
    String inputLine = "";
    while (inputLine != null) {
        result += inputLine + "\n";
        inputLine = in.readLine();
...

String responseBody = "";
try {
    HttpParams httpParameters = new BasicHttpParams();
    DefaultHttpClient httpClient = new DefaultHttpClient(
            httpParameters);
    HttpPost httpPost = new HttpPost(url);
    HttpResponse httpResponse = httpClient.execute(httpPost);
    HttpEntity httpEntity = httpResponse.getEntity();
...

Document document = null;
HttpURLConnection urlConnection = null;
try {
    URL url = new URL(address);
    urlConnection = (HttpURLConnection) url.openConnection();
    InputStream inputStream = new BufferedInputStream(
            urlConnection.getInputStream());
    DocumentBuilderFactory factory = DocumentBuilderFactory
...

try {
    DefaultHttpClient httpClient = new DefaultHttpClient();
    HttpPost httpPost = new HttpPost(url);
    HttpResponse httpResponse = httpClient.execute(httpPost);
    HttpEntity httpEntity = httpResponse.getEntity();
    return EntityUtils.toString(httpEntity);
} catch (Exception e) {
    return null;
...

if (url == null) {
    return -1;
String fileName = url.getFile();
if (fileName.charAt(0) == '/' || fileName.charAt(0) == '\\') {
    fileName = fileName.substring(1, fileName.length());
try {
...

InputStream inputStream = c.getContentResolver().openInputStream(
        uri);
BufferedReader reader = new BufferedReader(new InputStreamReader(
        inputStream));
StringBuilder stringBuilder = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
    stringBuilder.append(line);
...

URL htmlUrl = null;
InputStream inStream = null;
try {
    htmlUrl = new URL(url);
    URLConnection connection = htmlUrl.openConnection();
    HttpURLConnection httpConnection = (HttpURLConnection) connection;
    int responseCode = httpConnection.getResponseCode();
    if (responseCode == HttpURLConnection.HTTP_OK) {
...