1. Create Directory in Sdcard.
2. Delete Directory.
3.Get all files from any directory from SDcard.
4. Read content from file.
5. Sdcard is availability.
6.Save/Download files from server and store.
7.Byte Array from Image
8.Encoded & decode base64 string into image
2. Delete Directory.
3.Get all files from any directory from SDcard.
4. Read content from file.
5. Sdcard is availability.
6.Save/Download files from server and store.
7.Byte Array from Image
8.Encoded & decode base64 string into image
1. Create Directory
public static boolean createFolder(String path) {
if (storageReady()) {
boolean made = true;
File dir = new File(path);
if (!dir.exists()) {
made = dir.mkdirs();
}
return made;
} else {
return false;
}
}
2. Delete Directory
public boolean deleteFolder(String path) {
if (path != null && storageReady()) {
File dir = new File(path);
if (dir.exists() && dir.isDirectory()) {
File[] files = dir.listFiles();
for (File file : files) {
if (!file.delete()) {
Log.i(t, "Failed to delete " + file);
}
}
}
return dir.delete();
} else {
return false;
}
}
3. Delete File
public static boolean deleteFile(String path) {
if (storageReady()) {
File f = new File(path);
return f.delete();
} else {
return false;
}
}
4. Get All file from directory
public ArrayList<String> getFoldersAsArrayList(String path) {
ArrayList<String> mFolderList = new ArrayList<String>();
File root = new File(path);
if (!storageReady()) {
return null;
}
if (!root.exists()) {
if (!createFolder(path)) {
return null;
}
}
if (root.isDirectory()) {
File[] children = root.listFiles();
for (File child : children) {
boolean directory = child.isDirectory();
if (directory) {
mFolderList.add(child.getAbsolutePath());
}
}
}
return mFolderList;
}
5. Read content of file
public String getFileContentsAsString(final File file) throws IOException {
final InputStream inputStream = new FileInputStream(file);
final BufferedReader reader = new BufferedReader(newInputStreamReader(inputStream));
final StringBuilder stringBuilder = new StringBuilder();
boolean done = false;
while (!done) {
final String line = reader.readLine();
done = (line == null);
if (line != null) {
stringBuilder.append(line);
}
}
reader.close();
inputStream.close();
return stringBuilder.toString();
}
6. Sdcard availability.
public boolean storageReady() {
String cardstatus = Environment.getExternalStorageState();
if (cardstatus.equals(Environment.MEDIA_REMOVED)
|| cardstatus.equals(Environment.MEDIA_UNMOUNTABLE)
|| cardstatus.equals(Environment.MEDIA_UNMOUNTED)
|| cardstatus.equals(Environment.MEDIA_MOUNTED_READ_ONLY)) {
return false;
} else {
return true;
}
}
7. Download file form server.
void downloadFile(String strUrl , String filePath, String fileName)
{
try
{
URL url = new URL(strUrl);
File myDir = new File(filePath);
if (!myDir.exists())
{
myDir.mkdirs();
Log.v("", "inside mkdir");
}
/* checks the file and if it already exist delete */
String fname = fileName;
File file = new File(myDir, fname);
if (file.exists())
file.delete();
file.createNewFile();
/* Open a connection */
URLConnection ucon = url.openConnection();
InputStream inputStream = null;
HttpURLConnection httpConn = (HttpURLConnection) ucon;
httpConn.setRequestMethod("GET");
httpConn.connect();
if (httpConn.getResponseCode() == HttpURLConnection.HTTP_OK)
{
inputStream = httpConn.getInputStream();
}
FileOutputStream fos = new FileOutputStream(file);
// int totalSize = httpConn.getContentLength();
// int downloadedSize = 0;
byte[] buffer = new byte[1024];
int bufferLength = 0;
while ((bufferLength = inputStream.read(buffer)) > 0)
{
fos.write(buffer, 0, bufferLength);
// downloadedSize += bufferLength;
//Log.i("Progress:", "downloadedSize:" + downloadedSize+ "totalSize:" + totalSize);
}
fos.close();
Log.d("test", "Image Saved in sdcard..");
} catch (IOException io) {
io.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
8. Byte Array from Image.
private byte[] getByteArrayFromImage(String filePath) throws FileNotFoundException, IOException {
File file = new File(filePath);
System.out.println(file.exists() + "!!");
FileInputStream fis = new FileInputStream(file);
//create FileInputStream which obtains input bytes from a file in a file system
//FileInputStream is meant for reading streams of raw bytes such as image data. For reading streams of characters, consider using FileReader.
//InputStream in = resource.openStream();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte[] buf = new byte[1024];
try {
for (int readNum; (readNum = fis.read(buf)) != -1;) {
bos.write(buf, 0, readNum);
//no doubt here is 0
/*Writes len bytes from the specified byte array starting at offset
off to this byte array output stream.*/
System.out.println("read " + readNum + " bytes,");
}
} catch (IOException ex) {
Log.d("error","error");
}
byte[] bytes = bos.toByteArray();
return bytes;
}
8. Encoded & decode base64 string into image.
public static String encodeTobase64(Bitmap image)
{
Bitmap immagex=image;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
immagex.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] b = baos.toByteArray();
String imageEncoded = Base64.encodeToString(b,Base64.DEFAULT);
Log.e("Encode String", imageEncoded);
return imageEncoded;
}
public static Bitmap decodeBase64(String input)
{
byte[] decodedByte = Base64.decode(input, 0);
return BitmapFactory.decodeByteArray(decodedByte, 0, decodedByte.length);
No comments:
Post a Comment