Develop Reference

Scanning QR Codes using barcodeDetector by OPPO CPH1923 device

I have a project that scan QR Codes . It works fine using Samsung mobiles but I can't scan QR Codes using OPPO CPH1923 device . I made a debug and I found that , debugger didn't get into
receiveDetections override function .I don't know why this device dose that and I'm wasting my time .
I use Google mobile vision API
Note : I don't have a sim card in the mobile
Here is my code
barcodeDetector = new BarcodeDetector.Builder(MainActivity.this)
.setBarcodeFormats(Barcode.ALL_FORMATS)
.build();
cameraSource = new CameraSource.Builder(MainActivity.this,barcodeDetector)
.setRequestedPreviewSize(640,480)
.setAutoFocusEnabled(true)
.build();
surface.getHolder().addCallback(new SurfaceHolder.Callback() {
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
if(ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA)!= PackageManager.PERMISSION_GRANTED){
ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.CAMERA},REQUEST_CAMERA_PERMISSION);
}
else {
cameraSource.start(holder);
}
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
scannerDilaog.dismiss();
cameraSource.stop();
}
});
barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {
#Override
public void release() {
}
#Override
public void receiveDetections(Detector.Detections<Barcode> detections) {
final SparseArray<Barcode> barcodeSparseArray = detections.getDetectedItems();
if(barcodeSparseArray!=null&&barcodeSparseArray.size()>0){
if(!flag) {
final Handler handler = new Handler(Looper.getMainLooper());
handler.post(new Runnable() {
#Override
public void run() {
int times =0;
//flag = true;
cameraSource.stop();
Intent intent = new Intent(MainActivity.this, HomeActivity.class);
intent.putExtra("result", barcodeSparseArray.valueAt(0).displayValue);
Log.e("result"," "+barcodeSparseArray.valueAt(0).displayValue);
if(!flag) {
times++;
Log.d("times"," "+times);
startActivity(intent);
}
flag=true;
cameraSource.stop();
}
});
}
}
}
});

Finally I found the solution at this part of this Answer
Here
Based on the Google Samples(a comment in the source):
// Note: The first time that an app using the barcode or face API is installed on a
// device, GMS will download a native libraries to the device in order to do detection.
// Usually this completes before the app is run for the first time. But if that
// download has not yet completed, then the above call will not detect any barcodes
// and/or faces.

Bluetooth scanning for devices

I have a problem with my code:
private ScanCallback mLeScanCallback = new ScanCallback(){
//Callback when a BLE advertisement has been found.
#Override
public void onScanResult(int callbackType, final android.bluetooth.le.ScanResult result) {
super.onScanResult(callbackType, result);
new Thread(){
#Override
public void run() {
final BluetoothDevice device = result.getDevice();
runOnUiThread(new Runnable() {
#Override
public void run() {
if (device != null){
mDevices.add(device);
}
}
});
}
}.start();
}
//Callback when batch results are delivered.
#Override
public void onBatchScanResults(List<android.bluetooth.le.ScanResult> results) {
super.onBatchScanResults(results);
}
//Callback when scan could not be started.
#Override
public void onScanFailed(int errorCode) {
super.onScanFailed(errorCode);
}
currently I am using this code to get the results of my scan. This was based on: https://github.com/RedBearLab/Android/blob/master/Examples/Chat/src/com/redbear/chat/Main.java#L138
The app where is was based on had a lower API level, and my app has a higher one. So I changed it to on startScan() method.
I am honestly stuck, because when I run the app i get no errors. I checked if the mDevices array is empty and it is. Meaning that the code doesn't add the devices to the array or that there aren't any devices to be found by my app specifically.
Any help would be greatly appreciated.
Code of activating scanning
private void scanDevice(){
new Thread() {
#Override
public void run(){
BTScanner.startScan(mLeScanCallback);
try {
Thread.sleep(SCAN_PERIOD);
} catch (InterruptedException e){
e.printStackTrace();
}
BTScanner.stopScan(mLeScanCallback);
}
}.start();
}

Found the problem. It has to do with the permissions for ACCESS_COARSE_LOCATION or ACCESS_FINE_LOCATION to get the scan results.

App that changes estimote beacon uuid, major and minor

I know how to use the estimote sdk to alter the beacon's uuid, major and minor values but I was wondering if there exists an .apk that already does this to save me time.

You can change Major, Minor, Broadcasting Power, Advertising interval at official app by Estimote.
But changing of UUID is possible only by SDK.

I leave the code here, maybe someone will find it usefull, It'a pretty much the same for the three of them, only changes the writeMajor.
private void setMajorID(final int majorid,final Beacon beacon) {
mMajorsConnection = new BeaconConnection(this, beacon, new BeaconConnection.ConnectionCallback() {
#Override
public void onAuthenticated(BeaconConnection.BeaconCharacteristics chars) {
Log.d(TAG, "Authenticated to beacon: " + chars);
mMajorsConnection.writeMajor(majorid, new BeaconConnection.WriteCallback() {
#Override
public void onSuccess() {
runOnUiThread(new Runnable() {
#Override
public void run() {
mAdapter.update(beacon);
}
});
Log.d(TAG, "Successfully writted the major id!");
mMajorsConnection.close();
}
#Override
public void onError() {
Log.d(TAG, "Error while writting the major id!");
}
});
}
#Override
public void onAuthenticationError() {
Log.d(TAG, "Authentication Error");
}
#Override
public void onDisconnected() {
Log.d(TAG, "Disconnected");
}
});
mMajorsConnection.authenticate();
}

Implement barge-in for Android TTS

I am having difficulty figuring out how to resolve this issue, I am not sure if I am not setting up threads correctly or if it is even possible to resolve things properly.
This is an Android app that reads certain strings out as TTS (using the native Android TTS) at certain timings. During this TTS reading, the user should be able to barge-in with instructions such as "Stop" or "Pause." This recognition is done by using the iSpeech API.
Our current solution is to have the TTS running as a Thread that will output the proper strings. Once the user presses a button to begin the voice recognition (using an Intent), the app does voice recognition and handles it perfectly, but then TTS never again outputs anything. Logcat shows the following error:
11-28 02:18:57.072: W/TextToSpeech(16383): speak failed: not bound to TTS engine
I have thought about making the voice recognition a thread of its own that pauses the TTS, but the problem would then be that the timer controlling the TTS would become unsynced with what it should be.
Any advice or help would be appreciated.
Relevant code regarding the thread and the intent are below:
Thread
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Prevent device from sleeping mid build.
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.activity_build_order);
mPlayer = MediaPlayer.create(BuildOrderActivity.this, R.raw.bing);
params.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID,"stringId");
tts = new TextToSpeech(BuildOrderActivity.this, new TextToSpeech.OnInitListener() {
#SuppressWarnings("deprecation")
public void onInit(int status) {
if(status != TextToSpeech.ERROR)
{
tts.setLanguage(Locale.US);
tts.setOnUtteranceCompletedListener(new OnUtteranceCompletedListener() {
public void onUtteranceCompleted(String utteranceId) {
mPlayer.start();
}
});
}
}
});
buttonStart = (Button) findViewById(R.id.buttonStartBuild);
buttonStart.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
startBuild = new StartBuildRunnable();
Thread t = new Thread(startBuild);
t.start();
}
});
...//code continues oncreate setup for the view}
public class StartBuildRunnable implements Runnable {
public void run() {
double delay;
buildActions = parseBuildXMLAction();
buildTimes = parseBuildXMLTime();
say("Build has started");
delayForNextAction((getSeconds(buildTimes.get(0)) * 1000));
say(buildActions.get(0));
for (int i = 1; i < buildActions.size(); i++)
{
delay = calcDelayUntilNextAction(buildTimes.get(i - 1), buildTimes.get(i));
delayForNextAction((long) (delay * 1000));
say(buildActions.get(i));
//listViewBuildItems.setSelection(i);
}
say("Build has completed");
}
}
Intent
/**
* Fire an intent to start the speech recognition activity.
* #throws InvalidApiKeyException
*/
private void startRecognition() {
setupFreeFormDictation();
try {
recognizer.startRecord(new SpeechRecognizerEvent() {
#Override
public void onRecordingComplete() {
updateInfoMessage("Recording completed.");
}
#Override
public void onRecognitionComplete(SpeechResult result) {
Log.v(TAG, "Recognition complete");
//TODO: Once something is recognized, tie it to an action and continue recognizing.
// currently recognizes something in the grammar and then stops listening until
// the next button press.
if (result != null) {
Log.d(TAG, "Text Result:" + result.getText());
Log.d(TAG, "Text Conf:" + result.getConfidence());
updateInfoMessage("Result: " + result.getText() + "\n\nconfidence: " + result.getConfidence());
} else
Log.d(TAG, "Result is null...");
}
#Override
public void onRecordingCancelled() {
updateInfoMessage("Recording cancelled.");
}
#Override
public void onError(Exception exception) {
updateInfoMessage("ERROR: " + exception.getMessage());
exception.printStackTrace();
}
});
} catch (BusyException e) {
e.printStackTrace();
} catch (NoNetworkException e) {
e.printStackTrace();
}
}

How to integrate SIP into Android?

How to implement SIP protocol in Android ?
there is any SDK or library available to implement it easily into Android?

Here is a third party Library with sample code. You can use this, I have used it and it works fine.

Android 2.3 or higher provides API for SIP.
Refer this link for SIP in Android
also you can see DEMO project for SIP from Sample
update:
Android SDK Samples on github.
SipDemo1, SipDemo2

Search for SipDemo project in samples for android 4.0.3 SDK version(API level -15)

I have been investigated this sort of problem for a long time and found out that SipManager and SipProfile are unfortunatelly poor and extremelly buggy.
So I found a Linphone library. There is a link for their wiki. I implemented it in my project using maven:
repositories {
...
maven { "https://linphone.org/maven_repository/"}
}
Also there is a sample of using it on gitlab: link here, it's pretty fresh, for now :)
If the link would crash, I just copy/paste the most important part of how to use linphone's core:
public class LinphoneService extends Service {
private static final String START_LINPHONE_LOGS = " ==== Device information dump ====";
// Keep a static reference to the Service so we can access it from anywhere in the app
private static LinphoneService sInstance;
private Handler mHandler;
private Timer mTimer;
private Core mCore;
private CoreListenerStub mCoreListener;
public static boolean isReady() {
return sInstance != null;
}
public static LinphoneService getInstance() {
return sInstance;
}
public static Core getCore() {
return sInstance.mCore;
}
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
super.onCreate();
// The first call to liblinphone SDK MUST BE to a Factory method
// So let's enable the library debug logs & log collection
String basePath = getFilesDir().getAbsolutePath();
Factory.instance().setLogCollectionPath(basePath);
Factory.instance().enableLogCollection(LogCollectionState.Enabled);
Factory.instance().setDebugMode(true, getString(R.string.app_name));
// Dump some useful information about the device we're running on
Log.i(START_LINPHONE_LOGS);
dumpDeviceInformation();
dumpInstalledLinphoneInformation();
mHandler = new Handler();
// This will be our main Core listener, it will change activities depending on events
mCoreListener = new CoreListenerStub() {
#Override
public void onCallStateChanged(Core core, Call call, Call.State state, String message) {
Toast.makeText(LinphoneService.this, message, Toast.LENGTH_SHORT).show();
if (state == Call.State.IncomingReceived) {
Toast.makeText(LinphoneService.this, "Incoming call received, answering it automatically", Toast.LENGTH_LONG).show();
// For this sample we will automatically answer incoming calls
CallParams params = getCore().createCallParams(call);
params.enableVideo(true);
call.acceptWithParams(params);
} else if (state == Call.State.Connected) {
// This stats means the call has been established, let's start the call activity
Intent intent = new Intent(LinphoneService.this, CallActivity.class);
// As it is the Service that is starting the activity, we have to give this flag
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
}
};
try {
// Let's copy some RAW resources to the device
// The default config file must only be installed once (the first time)
copyIfNotExist(R.raw.linphonerc_default, basePath + "/.linphonerc");
// The factory config is used to override any other setting, let's copy it each time
copyFromPackage(R.raw.linphonerc_factory, "linphonerc");
} catch (IOException ioe) {
Log.e(ioe);
}
// Create the Core and add our listener
mCore = Factory.instance()
.createCore(basePath + "/.linphonerc", basePath + "/linphonerc", this);
mCore.addListener(mCoreListener);
// Core is ready to be configured
configureCore();
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent, flags, startId);
// If our Service is already running, no need to continue
if (sInstance != null) {
return START_STICKY;
}
// Our Service has been started, we can keep our reference on it
// From now one the Launcher will be able to call onServiceReady()
sInstance = this;
// Core must be started after being created and configured
mCore.start();
// We also MUST call the iterate() method of the Core on a regular basis
TimerTask lTask =
new TimerTask() {
#Override
public void run() {
mHandler.post(
new Runnable() {
#Override
public void run() {
if (mCore != null) {
mCore.iterate();
}
}
});
}
};
mTimer = new Timer("Linphone scheduler");
mTimer.schedule(lTask, 0, 20);
return START_STICKY;
}
#Override
public void onDestroy() {
mCore.removeListener(mCoreListener);
mTimer.cancel();
mCore.stop();
// A stopped Core can be started again
// To ensure resources are freed, we must ensure it will be garbage collected
mCore = null;
// Don't forget to free the singleton as well
sInstance = null;
super.onDestroy();
}
#Override
public void onTaskRemoved(Intent rootIntent) {
// For this sample we will kill the Service at the same time we kill the app
stopSelf();
super.onTaskRemoved(rootIntent);
}
private void configureCore() {
// We will create a directory for user signed certificates if needed
String basePath = getFilesDir().getAbsolutePath();
String userCerts = basePath + "/user-certs";
File f = new File(userCerts);
if (!f.exists()) {
if (!f.mkdir()) {
Log.e(userCerts + " can't be created.");
}
}
mCore.setUserCertificatesPath(userCerts);
}
private void dumpDeviceInformation() {
StringBuilder sb = new StringBuilder();
sb.append("DEVICE=").append(Build.DEVICE).append("\n");
sb.append("MODEL=").append(Build.MODEL).append("\n");
sb.append("MANUFACTURER=").append(Build.MANUFACTURER).append("\n");
sb.append("SDK=").append(Build.VERSION.SDK_INT).append("\n");
sb.append("Supported ABIs=");
for (String abi : Version.getCpuAbis()) {
sb.append(abi).append(", ");
}
sb.append("\n");
Log.i(sb.toString());
}
private void dumpInstalledLinphoneInformation() {
PackageInfo info = null;
try {
info = getPackageManager().getPackageInfo(getPackageName(), 0);
} catch (PackageManager.NameNotFoundException nnfe) {
Log.e(nnfe);
}
if (info != null) {
Log.i(
"[Service] Linphone version is ",
info.versionName + " (" + info.versionCode + ")");
} else {
Log.i("[Service] Linphone version is unknown");
}
}
private void copyIfNotExist(int ressourceId, String target) throws IOException {
File lFileToCopy = new File(target);
if (!lFileToCopy.exists()) {
copyFromPackage(ressourceId, lFileToCopy.getName());
}
}
private void copyFromPackage(int ressourceId, String target) throws IOException {
FileOutputStream lOutputStream = openFileOutput(target, 0);
InputStream lInputStream = getResources().openRawResource(ressourceId);
int readByte;
byte[] buff = new byte[8048];
while ((readByte = lInputStream.read(buff)) != -1) {
lOutputStream.write(buff, 0, readByte);
}
lOutputStream.flush();
lOutputStream.close();
lInputStream.close();
}
}
I hope, that will help somebody, because I spend a lot of time trying to find it!

I used by this library:
https://www.mizu-voip.com/Software/SIPSDK/AndroidSIPSDK.aspx
it is very easy.
also i add button for answer the call:
mysipclient.Accept(mysipclient.GetLine());