Develop Reference

Bluetooth Printing from Android not working as expected

I have been using the following code to send data to a bluetooth printer:
try {
BluetoothAdapter oBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
BluetoothDevice oDispositivo = oBluetoothAdapter.getRemoteDevice(cMAC);
Method oMethod = oDispositivo.getClass().getMethod("createRfcommSocket",new Class[] { int.class });
oSocket = (BluetoothSocket) oMethod.invoke(oDispositivo, Integer.valueOf(1));
oSocket.connect();
btoutputstream = new BufferedWriter(new OutputStreamWriter(oSocket.getOutputStream(),"ISO_8859_1"));
// Enviamos el mensaje
int off = 0;
while(off < nLength){
btoutputstream.write(msg,off,nBloque);
btoutputstream.flush();
Thread.sleep(nSleep);
off += nBloque;
if((off + nBloque) > nLength) nBloque = nLength - off;
}
btoutputstream.flush();
}catch(Exception e){
return cFail + " || Exception: " + e.toString();
}
finally{
try{
if(btoutputstream != null) btoutputstream.close();
if(oSocket != null) oSocket.close();
}catch(Exception e2){
return e2.toString();
}
}
The problem is that this code is not working on the same printer with a new Bluetooth device. It prints the first block of code and it doesn't print anymore.
So I've been looking for a way to make it work, and I ended up using this:
public static String BluetoothPrint()
{
try{
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mmDevice = mBluetoothAdapter.getRemoteDevice(cMac);
UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");
mmSocket = mmDevice.createRfcommSocketToServiceRecord(uuid);
mmSocket.connect();
mmOutputStream = mmSocket.getOutputStream();
mmInputStream = mmSocket.getInputStream();
beginListenForData();
mmOutputStream.write(cText.getBytes());
} catch(Exception e) {
return "error: " + e.toString();
} finally {
// try{
// stopWorker = true;
// mmOutputStream.close();
// mmInputStream.close();
// mmSocket.close();
// } catch(Exception e) {
// return "error: " + e.toString()
// }
}
return "ok";
}
public static void beginListenForData(){
try {
final Handler handler = new Handler();
// This is the ASCII code for a newline character
final byte delimiter = 10;
stopWorker = false;
readBufferPosition = 0;
readBuffer = new byte[1024];
workerThread = new Thread(new Runnable() {
public void run() {
while (!Thread.currentThread().isInterrupted()
&& !stopWorker) {
try {
int bytesAvailable = mmInputStream.available();
if (bytesAvailable > 0) {
byte[] packetBytes = new byte[bytesAvailable];
mmInputStream.read(packetBytes);
for (int i = 0; i < bytesAvailable; i++) {
byte b = packetBytes[i];
if (b == delimiter) {
byte[] encodedBytes = new byte[readBufferPosition];
System.arraycopy(readBuffer, 0,
encodedBytes, 0,
encodedBytes.length);
final String data = new String(
encodedBytes, "US-ASCII");
readBufferPosition = 0;
handler.post(new Runnable() {
public void run() {
//myLabel.setText(data);
}
});
} else {
readBuffer[readBufferPosition++] = b;
}
}
}
} catch (Exception ex) {
stopWorker = true;
}
}
}
});
workerThread.start();
} catch (NullPointerException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
This code is working correct, but my main problem is that the printing is very slow (up to 1:30 min, while before it was printing in 15-20 seconds). I realized that it is going slow because of the empty lines. The printer is slow while printing them, but there's no problem with the lines which have text.
So I'm looking for a way to speed up that code, but I'm stuck. I tried to make the read buffer bigger, but doesn't seem to do nothing.

I've finally managed to get it working properly.
In the text that I was sending to print, the empty lines just had a linebreak (CRLF). As the other ones were printing OK, I tried to add a character on the empty lines (a space, so it prints the same) and it doesn't print slow anymore. I don't know what's the reason of this, but it is working faster, just like before the bluetooth changed.

Adding EXIF Data to File in Java

Looking to add GPS location data to an image as it saves, as far as i'm aware this needs to be done after the outputStream closes. I've written the code and implemented it however no GPS location data is written. As far as i'm aware i have prepared all the relevant data that would be required for the EXIF Data.
GPS Converting Code
public String getLon(Location location) {
if (location == null) return "0/1,0/1,0/1000";
String[] degMinSec = Location.convert(location.getLongitude(), Location.FORMAT_SECONDS).split(":");
return degMinSec[0] + "/1," + degMinSec[1] + "/1," + degMinSec[2] + "/1000";
}
public String getLat(Location location) {
if (location == null) return "0/1,0/1,0/1000";
String[] degMinSec = Location.convert(location.getLatitude(), Location.FORMAT_SECONDS).split(":");
return degMinSec[0] + "/1," + degMinSec[1] + "/1," + degMinSec[2] + "/1000";
}
Code to save the Image
file = new File(Environment.getExternalStorageDirectory() + "/DCIM/GeoVista/" + UUID.randomUUID().toString() + ".jpg");
ImageReader.OnImageAvailableListener readerListener = new ImageReader.OnImageAvailableListener() {
#Override
public void onImageAvailable(ImageReader imageReader) {
Image image = null;
try {
image = reader.acquireLatestImage();
ByteBuffer buffer = image.getPlanes()[0].getBuffer();
byte[] bytes = new byte[buffer.capacity()];
buffer.get(bytes);
save(bytes);
storeGeoCoordsToImage(bytes);
save(bytes);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
{
if (image != null)
image.close();
}
}
}
private void save(byte[] bytes) throws IOException {
OutputStream outputStream = null;
try {
outputStream = new FileOutputStream(file);
outputStream.write(bytes);
} finally {
if (outputStream != null)
outputStream.close();
}
}
};
EXIF DATA CODE
public boolean storeGeoCoordsToImage(File file, Location location) {
// Avoid NullPointer
if (file == null || location == null) return false;
try {
ExifInterface exif = new ExifInterface(file.getAbsolutePath());
exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE, getLat(location));
exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE_REF, location.getLatitude() < 0 ? "S" : "N");
exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE, getLon(location));
exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE_REF, location.getLongitude() < 0 ? "W" : "E");
exif.saveAttributes();
} catch (IOException e) {
// do something
return false;
}
// Data was likely written. For sure no NullPointer.
return true;
}
Any Input would be greatly appreciated.

Android CAMERA 2 API captures 0kb images & gives a full white preview. Shows no errors or warnings on logcat

I use Android CAMERA 2 API for the camera2 supporting phones on my app. Works great, but some times it captures 0kb images & gives a full white preview. Shows no errors or warnings on logcat. Below is my camera image capture & save code:
protected void takePictureViaCamera2() {
if (null == cameraDevice) {
Log.e(TAG, "cameraDevice is null");
return;
}
CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
try {
CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraDevice.getId());
Size[] jpegSizes = null;
if (characteristics != null) {
jpegSizes = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP).getOutputSizes(ImageFormat.JPEG);
}
int width = 640;
int height = 480;
if (jpegSizes != null && 0 < jpegSizes.length) {
width = jpegSizes[0].getWidth();
height = jpegSizes[0].getHeight();
}
ImageReader reader = ImageReader.newInstance(width, height, ImageFormat.JPEG, 1);
List<Surface> outputSurfaces = new ArrayList<Surface>(2);
outputSurfaces.add(reader.getSurface());
outputSurfaces.add(new Surface(textureView.getSurfaceTexture()));
final CaptureRequest.Builder captureBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);
captureBuilder.addTarget(reader.getSurface());
captureBuilder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO);
// Orientation
int rotation = getWindowManager().getDefaultDisplay().getRotation();
captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, ORIENTATIONS.get(rotation));
//final File file = new File(Environment.getExternalStorageDirectory()+"/pic.jpg");
final File file = createImageFile();
final String checkPath = file.getParent();
Log.e("checkPath", checkPath);
//photoFile = createImageFile();
//photoFilePath = photoFile.getParent();
//Log.e("photoFilePath", photoFilePath);
ImageReader.OnImageAvailableListener readerListener = new ImageReader.OnImageAvailableListener() {
#Override
public void onImageAvailable(ImageReader reader) {
Image image = null;
try {
image = reader.acquireLatestImage();
ByteBuffer buffer = image.getPlanes()[0].getBuffer();
byte[] bytes = new byte[buffer.capacity()];
buffer.get(bytes);
save(bytes);
} catch (FileNotFoundException e) {
e.printStackTrace();
Log.e("readerListenerFNF_EX", e + "");
} catch (IOException e) {
e.printStackTrace();
Log.e("readerListenerIO_EX", e + "");
} catch (Exception e) {
e.printStackTrace();
Log.e("readerListener_EX", e + "");
} finally {
if (image != null) {
image.close();
}
}
}
private void save(byte[] bytes) throws IOException {
OutputStream output = null;
try {
output = new FileOutputStream(file);
//output = new FileOutputStream(photoFile);
output.write(bytes);
} finally {
if (null != output) {
output.close();
}
}
}
};
reader.setOnImageAvailableListener(readerListener, mBackgroundHandler);
final CameraCaptureSession.CaptureCallback captureListener = new CameraCaptureSession.CaptureCallback() {
#Override
public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request, TotalCaptureResult result) {
super.onCaptureCompleted(session, request, result);
Toast.makeText(TravelChargesCamera2Activity.this, "Saved***:" + file, Toast.LENGTH_SHORT).show();
createCameraPreview();
closeCamera();
Thread thread = new Thread() {
#Override
public void run() {
try {
synchronized (this) {
wait(5000);
runOnUiThread(new Runnable() {
#Override
public void run() {
toolbar.setVisibility(View.VISIBLE);
header.setVisibility(View.VISIBLE);
assessorTraveldetails_scroll.setVisibility(View.VISIBLE);
camera2Layout.setVisibility(View.GONE);
try {
if (!file.getParentFile().isDirectory()) {
travelDirectory = new File(checkPath);
Log.e("travelDir==created==", travelDirectory + "");
} else {
travelDirectory = file.getParentFile();
Log.e("travelDir==exists==", travelDirectory + "");
}
files = travelDirectory.listFiles();
Log.e("files", files + "");
// removes old images from view
// prevents display duplication
travelGallery.removeAllViews();
// loop displays the photos captured on Horizontal ScrollView
for (File picFile : files) {
travelGallery.addView(insertPhoto(picFile.getAbsolutePath()));
byte[] byteArray = ImageUtils.fileToByteArray(file);
Log.e("byteArray", byteArray + "");
}
} catch (Exception e) {
e.printStackTrace();
Log.e("file", e + "");
}
}
});
}
} catch (InterruptedException e) {
e.printStackTrace();
Log.e("InterruptedException", e + "");
} catch (Exception e) {
e.printStackTrace();
Log.e("Exception", e + "");
}
}
};
thread.start();
}
};
cameraDevice.createCaptureSession(outputSurfaces, new CameraCaptureSession.StateCallback() {
#Override
public void onConfigured(CameraCaptureSession session) {
try {
session.capture(captureBuilder.build(), captureListener, mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
#Override
public void onConfigureFailed(CameraCaptureSession session) {
}
}, mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
Log.e("CameraAccessException", e + "");
} catch (Exception e) {
e.printStackTrace();
Log.e("takePictureViaCamera2", e + "");
}
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String uniqueId = UUID.randomUUID().toString();
String imageFileName = "CAP_" + timeStamp + "_" + uniqueId;
String bCode = "";
masterMap = (LinkedTreeMap) gson.fromJson(batchMasterObject.getMasterJson(), Object.class);
auditMap = (LinkedTreeMap) masterMap.get("2001");
if ((auditMap.get("batchCode") != null && !auditMap.get("batchCode").equals(""))) {
bCode = auditMap.get("batchCode").toString();
} else if (auditMap.get("cbc") != null && !auditMap.get("cbc").equals("")) {
bCode = auditMap.get("cbc").toString();
}
File storageDir = new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES), "/" + bCode + "/Travel/");
if (!storageDir.exists()) {
storageDir.mkdirs();
}
String checkPath = storageDir.getPath();
Log.e("checkPath", checkPath);
Toast.makeText(getApplicationContext(), checkPath, Toast.LENGTH_LONG).show();
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = storageDir.getAbsolutePath();
return image;
}
Could any one help on this?
NOTE: The camera, captures and stores an image file as intended, but the file size is 0kb. When the image file is opened on phone or pc, it says "Unsupported format"

It looks like you're taking your final JPEG capture as the very first frame.
This means the camera's auto-exposure routines have not had any time to work (since you're grabbing the first frame), so the image will be captured with the initial settings hardcoded into the camera driver. This may work for some scenes, but in others, the image will be far too bright or far too dark.
For best results, you should first let the camera meter for a while, until auto-exposure and auto-focus are converged.
Generally, this can be done by setting up a low-resolution preview output (use a SurfaceTexture for example), and running it for a second or two (or wait until a CaptureResult has an AE_STATE of CONVERGED). Then issue the JPEG capture.

Difference between triggering camera.take picture from button click[Working] and through function call[Not working]

I am stuck at this. MY application clicks multiple images programmatically.
Issue is my take picture call is inside button listener click function.
1. When i do button click it triggers the thread for take picture that works.
2. If i directly call that obj.run() it does not-> shows take picture failed at run time.
3. If i do btn.perform click - still fails.
I am building an application that listens on a socket and on a trigger click multiple images n save them to create .gif.
code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// android.support.v7.appcompat.R.layout.activity_main;
setContentView(R.layout.activity_main);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
myContext = this;
initialize();
}
private int findFrontFacingCamera() {
int cameraId = -1;
// Search for the front facing camera
int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numberOfCameras; i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
cameraId = i;
cameraFront = true;
break;
}
}
return cameraId;
}
private int findBackFacingCamera() {
int cameraId = -1;
//Search for the back facing camera
//get the number of cameras
int numberOfCameras = Camera.getNumberOfCameras();
//for every camera check
for (int i = 0; i < numberOfCameras; i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == CameraInfo.CAMERA_FACING_BACK) {
cameraId = i;
cameraFront = false;
break;
}
}
return cameraId;
}
public void onResume() {
super.onResume();
if (!hasCamera(myContext)) {
Toast toast = Toast.makeText(myContext, "Sorry, your phone does not have a camera!", Toast.LENGTH_LONG);
toast.show();
finish();
}
if (mCamera == null) {
//if the front facing camera does not exist
if (findFrontFacingCamera() < 0) {
Toast.makeText(this, "No front facing camera found.", Toast.LENGTH_LONG).show();
switchCamera.setVisibility(View.GONE);
}
mCamera = Camera.open(findFrontFacingCamera());
// mCamera.Parameters.class.
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
capture.performClick();
Log.d("naval", "onresume- clicked performed");
}
}
public void initialize() {
cameraPreview = (LinearLayout) findViewById(R.id.camera_preview);
mPreview = new CameraPreview(myContext, mCamera);
cameraPreview.addView(mPreview);
capture = (Button) findViewById(R.id.button_capture);
// capture.setVisibility(View.GONE);
capture.setOnClickListener(captrureListener);
// capture.performClick();
switchCamera = (Button) findViewById(R.id.button_ChangeCamera);
switchCamera.setVisibility(View.GONE); // JUST CHANGE THIS TO MAKE SWITCH CAMERA WORKS
switchCamera.setOnClickListener(switchCameraListener);
Log.d("naval", "initialize");
}
OnClickListener switchCameraListener = new OnClickListener() {
#Override
public void onClick(View v) {
//get the number of cameras
int camerasNumber = Camera.getNumberOfCameras();
if (camerasNumber > 1) {
//release the old camera instance
//switch camera, from the front and the back and vice versa
releaseCamera();
chooseCamera();
} else {
Toast toast = Toast.makeText(myContext, "Sorry, your phone has only one camera!", Toast.LENGTH_LONG);
toast.show();
}
}
};
public void chooseCamera() {
//if the camera preview is the front
if (cameraFront) {
int cameraId = findBackFacingCamera();
if (cameraId >= 0) {
//open the backFacingCamera
//set a picture callback
//refresh the preview
mCamera = Camera.open(cameraId);
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
}
} else {
int cameraId = findFrontFacingCamera();
if (cameraId >= 0) {
//open the backFacingCamera
//set a picture callback
//refresh the preview
mCamera = Camera.open(cameraId);
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
}
}
}
#Override
protected void onPause() {
super.onPause();
//when on Pause, release camera in order to be used from other applications
releaseCamera();
Log.d("naval", "onpause");
}
private boolean hasCamera(Context context) {
//check if the device has camera
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
return true;
} else {
return false;
}
}
private PictureCallback getPictureCallback() {
PictureCallback picture = new PictureCallback() {
#Override
public void onPictureTaken(byte[] data, Camera camera) {
//make a new picture file
File pictureFile = getOutputMediaFile();
Log.d("naval", "picture call back start");
if (pictureFile == null) {
return;
}
try {
//write the file
FileOutputStream fos = new FileOutputStream(pictureFile);
Log.d("naval", "picture call back stream creation");
fos.write(data);
fos.close();
Toast toast = Toast.makeText(myContext, "Picture saved: " + pictureFile.getName(), Toast.LENGTH_LONG);
Log.d("naval", "picture call back toast");
toast.show();
} catch (FileNotFoundException e) {
} catch (IOException e) {
}
//refresh camera to continue preview
mPreview.refreshCamera(mCamera);
//cameraPreview.start();
}
};
return picture;
}
OnClickListener captrureListener = new OnClickListener() {
#Override
public void onClick(View v) {
try {
Thread.sleep(1000);
}catch (Exception e)
{
e.printStackTrace();
}
CaptureThread captureThread = new CaptureThread();
captureThread.start();
/* String str = "";
while(true)
{
Log.d("naval","waiting for start inside file loop");
str = readFromFile();
if(str.equals("start")) {
Log.d("naval","calling capture object");
str = "";
CaptureThread captureThread = new CaptureThread();
captureThread.start();
}
else
{
try {
Log.d("naval","sleeping inside str loop");
Thread.sleep(1000);
}catch(Exception e)
{
e.printStackTrace();
}
continue;
// put sleep here
}
// read text file here at location /sdcard/info/info.txt
}*/
}
};
private String readFromFile() {
String ret = "";
try {
FileInputStream fis = new FileInputStream (new File("/storage/emulated/0/info/info.txt")); // 2nd line
// InputStream inputStream = openFileInput("/storage/emulated/0/info/info.txt");
if ( fis != null ) {
InputStreamReader inputStreamReader = new InputStreamReader(fis);
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String receiveString = "";
StringBuilder stringBuilder = new StringBuilder();
while ( (receiveString = bufferedReader.readLine()) != null ) {
stringBuilder.append(receiveString);
}
fis.close();
ret = stringBuilder.toString();
Log.d("naval- string",ret);
if(!ret.isEmpty())
{
Log.d("naval","str is not null");
//delete file or clear file and create one
File fil = new File("/storage/emulated/0/info/info.txt");
fil.delete();
// create
File file = new File("/storage/emulated/0/info/info.txt");
file.createNewFile();
}
}
}
catch (FileNotFoundException e) {
Log.e("login activity", "File not found: " + e.toString());
} catch (IOException e) {
Log.e("login activity", "Can not read file: " + e.toString());
}
return ret;
}
//make picture and save to a folder
private static File getOutputMediaFile() {
//make a new file directory inside the "sdcard" folder
File mediaStorageDir = new File("/sdcard/", "pics");
Log.d("naval", "save picture function");
//if this "JCGCamera folder does not exist
if (!mediaStorageDir.exists()) {
//if you cannot make this folder return
if (!mediaStorageDir.mkdirs()) {
return null;
}
}
Log.d("naval", "cave picture betweent");
//take the current timeStamp
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
//and make a media file:
mediaFile = new File(mediaStorageDir.getPath() + File.separator + "pic" + glo + ".png");
Log.d("naval", "File path above");
glo++;
return mediaFile;
}
private void releaseCamera() {
// stop and release camera
if (mCamera != null) {
mCamera.release();
mCamera = null;
}
}
class CaptureThread extends Thread {
#Override
public void run() {
int count = 0;
while(count < 6) {
**mCamera.takePicture(null, null, mPicture);**
count++;
try {
Thread.sleep(1000);
} catch (InterruptedException exception) {
exception.printStackTrace();
}
}
createGif();
}
public void createGif()
{
ByteArrayOutputStream bos = new ByteArrayOutputStream();
AnimatedGifEncoder encoder = new AnimatedGifEncoder();
BitmapFactory.Options options=new BitmapFactory.Options();
options.inSampleSize = 6;
encoder.setDelay(100);
encoder.start(bos);
for(int i = 0;i<6;i++){
Bitmap bMap = BitmapFactory.decodeFile("/storage/emulated/0/pics/pic"+i+".png",options);
Log.d("naval","added image");
encoder.addFrame(bMap);
}
encoder.finish();
writeToFile(bos.toByteArray());
}
public void writeToFile(byte[] array) {
try {
String path = Environment.getExternalStorageDirectory() + "/gif/gif.gif";
FileOutputStream stream = new FileOutputStream(path);
stream.write(array);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}

ok the answer is from button click it comes from UI thread. But the function call does not. to run this call the function from UI thread . It will work!!

Service takes too much memory

I have a service that extracting html code from an URL, converting it to text only (with Jsoup) and then checks something on the string, and if some conditions are true it launches a notification and writes something to a file.
As far as I know, this kind of service shouldn't take much memory, and in Watchdog, it takes ~65 MB, and it is way too much. It takes more than any other process (even more than tw launcher and Android System).
I would like you to tell me what have I done wrong.
Heres my service class:
public class NotifyService extends Service
{
private int number=0;
private Timer timer=new Timer();
private long INTERVAL=1*1000*60*60;//1 hour
public static String Oldhtml;
public static String Newhtml;
public static String currHtml;
// hooks main activity here
/*
* not using ipc...but if we use in future
*/
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate()
{
super.onCreate();
_startService();
Log.w("myApp", "START");
}
#Override
public void onDestroy()
{
super.onDestroy();
_shutdownService();
Log.w("myApp", "STOPPED");
}
/*
* starting the service
*/
private void _startService()
{
timer.scheduleAtFixedRate(new TimerTask() {
public void run() {
try {
doServiceWork();
} catch (ClientProtocolException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
Thread.sleep(INTERVAL);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
},0,INTERVAL);
;
}
/*
* start the processing, the actual work, getting config params, get data from network etc
*/
private void doServiceWork() throws ClientProtocolException, IOException
{
String FILENAME="blichData";
String info=null;
String classLetter = null,classNum1=null;
int classNum = 0;
try{
FileInputStream fis=openFileInput(FILENAME);
byte[] dataArray = new byte[fis.available()];
while(fis.read(dataArray)!=-1)
{
info = new String(dataArray);
}
classLetter = info.substring(0, info.lastIndexOf(" "));
classNum1 =info.substring(info.lastIndexOf(" ")+1);
classNum=Integer.parseInt(classNum1);
fis.close();
}catch (Exception e){
}
if (classLetter!=null && classNum1!=null) {
Oldhtml=readHTMLfromFile();
if (GetHTML.isHavingChanges(classLetter,classNum))
{
myNotify();
writeHTMLtoFile(currHtml);
/*
try {
String data= "false";
FileOutputStream fos = openFileOutput("blichService", Context.MODE_PRIVATE);
fos = openFileOutput("blichService",Context.MODE_PRIVATE);
fos.write(data.getBytes());
fos.close();
}
catch (Exception e) {}
*/
}
}
;
}
/*
* shutting down the service
*/
private void _shutdownService()
{
if (timer != null) timer.cancel();
Log.i(getClass().getSimpleName(), "Timer stopped...");
}
public void writeHTMLtoFile(String html) {
try {
String FILENAME = "blichNotifyData";
String data= html;
FileOutputStream fos = openFileOutput(FILENAME, Context.MODE_PRIVATE);
fos = openFileOutput(FILENAME,Context.MODE_PRIVATE);
fos.write(data.getBytes());
fos.close();
}
catch (Exception e){}
}
public String readHTMLfromFile() {
String FILENAME = "blichNotifyData";
String info="";
try{
FileInputStream fis=openFileInput(FILENAME);
if (fis.available()>0)
{
byte[] dataArray = new byte[fis.available()];
while(fis.read(dataArray)!=-1)
{
info = new String(dataArray);
}
fis.close();
}
else {
Oldhtml="null";
}
}
catch (Exception e) {}
return info;
}
public void myNotify()
{
NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
Intent intent= new Intent (this,SchoolBlichActivity.class);
PendingIntent pi = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_ONE_SHOT);
String body = " בליך";
String title = "ישנם שינויים חדשים!";
Notification n =new Notification(R.drawable.table, body, System.currentTimeMillis());
n.flags |=Notification.FLAG_AUTO_CANCEL;
n.setLatestEventInfo(getApplicationContext(), title, body, pi);
n.defaults = Notification.DEFAULT_ALL;
number++;
n.number=number;
nm.notify(0,n);
}
}
And if it is needed, the HTML extracting class:
public class GetHTML {
public static boolean isHavingChanges(String classLetter,int classNum) throws ClientProtocolException, IOException {
int classLetterCode = 0;
int timeTableCode=1;
if (classLetter.equals("ט"))
classLetterCode=0;
else if (classLetter.equals("י"))
classLetterCode=1;
else if (classLetter.equals("יא"))
classLetterCode=2;
else if (classLetter.equals("יב"))
classLetterCode=3;
switch(classLetterCode)
{
case 0:
if (classNum>=1 && classNum<=7)
timeTableCode=1;
else if (classNum>7 && classNum<=14)
timeTableCode=2;
break;
case 1:
if (classNum>=1 && classNum<=7)
timeTableCode=3;
else if (classNum>7 && classNum<=14)
timeTableCode=4;
break;
case 2:
if (classNum>=1 && classNum<=7)
timeTableCode=5;
else if (classNum>7 && classNum<=14)
timeTableCode=6;
break;
case 3:
if (classNum>=1 && classNum<=7)
timeTableCode=7;
else if (classNum>7 && classNum<=14)
timeTableCode=8;
break;
}
String url = "http://blich.iscool.co.il/DesktopModules/IS.TimeTable/MainScreen.aspx?pid=17&mid=6264&page="+timeTableCode+"&msgof=0&static=1";
HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet(url);
HttpResponse response = client.execute(request);
String html = "";
InputStream in = response.getEntity().getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder str = new StringBuilder();
String line = null;
while((line = reader.readLine()) != null)
{
str.append(line);
}
in.close();
html = str.toString();
html = Jsoup.parse(html).text();
if (NotifyService.Oldhtml.equalsIgnoreCase(html)) {
return false;
}
if (timeTableCode%2!=0){
for (int i=0;i<8;i++) {
if (!html.contains(i+" "+i)) {
NotifyService.currHtml=html;
return true;
}
}
}
if (timeTableCode%2==0) {
for (int i=8;i<15;i++) {
if (!html.contains(i+" "+i)) {
NotifyService.currHtml=html;
return true;
}
}
}
return false;
}
}
Ignore the foreign language. xD
I just want to understand what have I done wrong?
Thanks

While I cannot tell out-of-the-box what portion of your code is problematic, you may try to analyze the memory usage through a heap dump taken with DDMS using Eclipse MAT. You will need to use the hprofconv tool to convert your Android heap dump into a format that MAT understands.
To get the HPROF Heap Dump, open the Dalvik Debug Monitor (DDMS), connect it you your emulator, select the process of your application and hit the "Dump HPROF file" icon.