Android Utililty Methods File to Byte Array Read

FileInputStream inputStream = null;
byte[] fileContent = null;
try {
    inputStream = new FileInputStream(file);
    fileContent = new byte[(int) file.length()];
    inputStream.read(fileContent);
} catch (Exception e) {
    e.printStackTrace();
...

if (file == null || !file.exists()) {
    return null;
ByteArrayOutputStream out = new ByteArrayOutputStream();
FileInputStream in = new FileInputStream(file);
int c = in.read();
while (c != -1) {
    out.write(c);
...

InputStream is = new FileInputStream(file);
long length = file.length();
if (length > Integer.MAX_VALUE) {
    throw new IOException("File " + file.getName()
            + " is too large to process");
byte[] bytes = new byte[(int) length];
int offset = 0;
...

try (FileInputStream fis = new FileInputStream(file);
        ByteArrayOutputStream ous = new ByteArrayOutputStream()) {
    fis.skip(startPostion);
    byte[] dataBytes = new byte[BUFFER_SIZE];
    long totalRead = 0;
    int nread = 0;
    while ((nread = fis.read(dataBytes)) != -1
            && (totalRead <= numberOfBytesToRead || numberOfBytesToRead == -1)) {
...

return getFileAsByteArrayOutputStream(file).toByteArray();

InputStream in = null;
String tmpFilename = null;
OutputStream out = null;
byte[] buf = new byte[1024 * 8];
int len = 0;
try {
    in = new FileInputStream(file);
    out = new ByteArrayOutputStream();
...

int length = (int) file.length();
assert (length != 0);
byte[] bytes = new byte[length];
int totalBytesRead = 0;
FileInputStream inputStream = null;
try {
    inputStream = new FileInputStream(file);
    while (totalBytesRead != length) {
...

return readBytes(new File(filePath));

FileInputStream fis;
fis = new FileInputStream(fx);
long length = fx.length();
byte[] bytes = new byte[(int) length];
int offset = 0;
int numRead = 0;
while (offset < bytes.length
        && (numRead = fis
...

byte[] fileBytes = new byte[(int) file.length()];
FileInputStream fis = null;
try {
    fis = new FileInputStream(file);
    int offset = 0;
    int count = (int) file.length();
    int temp = 0;
    while ((temp = fis.read(fileBytes, offset, count)) > 0) {
...