Develop Reference

Unity Ads are displaying continuously in my Android App

I have an Android app developed in Android Studio. And I have integrated Unity Ads in my app showing full-screen video Ads.
I have followed each step carefully in their documentation:
https://unityads.unity3d.com/help/monetization/integration-guide-android
But the ads are displaying continuously one after another. There is no stopping for this video ads. I am losing users for my app because of this.
Here is my implementation according to their docs in MainActivity.class:
UnityListener unityListener = new UnityListener();
UnityAds.initialize(MainActivity.this, "my_ad_unit_id", unityListener);
private class UnityListener implements IUnityAdsListener {
#Override
public void onUnityAdsReady(String s) {
UnityAds.show(MainActivity.this);
}
#Override
public void onUnityAdsStart(String s) {
}
#Override
public void onUnityAdsFinish(String s, UnityAds.FinishState finishState) {
}
#Override
public void onUnityAdsError(UnityAds.UnityAdsError unityAdsError, String s) {
}
}

QR code reader to extract data

i have a sales summary print out and has a QR Code ,
i want to develop an app (IOS and android) that reads the QR code , extract all information,do some calculations,and display in specific form , i tried zxing library but it did not extract all information from the receipt.any tip?

You can use google vision API to achieve this. I personally used this and found it great. The below code snippets should help you.
Put this below line in the gradle.
compile 'com.google.android.gms:play-services:9.4.0'
Use BarcodeDetector and CameraSource classes to capture the QR code on real time and decode it.
barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {
#Override
public void release() {
}
#Override
public void receiveDetections(Detector.Detections<Barcode> detections) {
final SparseArray<Barcode> barcodes = detections.getDetectedItems();
if (barcodes.size() != 0) {
barcodeInfo.post(new Runnable() { // Use the post method of the TextView
public void run() {
barcodeInfo.setText( // Update the TextView
barcodes.valueAt(0).displayValue
);
}
});
}
}
});
Use a SparseArray to fetch the detections and the displayValue of the elements of this sparse array returns the deocded string.
After extracting the string one can do anything, be it displaying the string or make some calculation out of it etc.

This library is the most popular and easiest of reading QR codes in your Android application.
You should also have a look at the Wiki section of this library for learning about how to integrate this library into your Android Application and how to use this library.
This is how you can use this library.
1. Add this library to your project by adding following line into your dependencies inside build.gradle(Module: app) file
compile 'com.github.nisrulz:qreader:2.0.0'
2. Then, after syncing project files, add the SurfaceView element provided by this library into your XML layout file.
<SurfaceView
android:id="#+id/camera_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
3. Declare the SurfaceView & QREader inside your Activity's Java file & then initialize it inside onCreate() method.
class MainActivity extends AppCompatActivity{
private SurfaceView mySurfaceView;
private QREader qrEader;
#Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Setup SurfaceView
// -----------------
mySurfaceView = (SurfaceView) findViewById(R.id.camera_view);
// Init QREader
// ------------
qrEader = new QREader.Builder(this, mySurfaceView, new QRDataListener() {
#Override
public void onDetected(final String data) {
Log.d("QREader", "Value : " + data);
text.post(new Runnable() {
#Override
public void run() {
text.setText(data);
}
});
}
}).facing(QREader.BACK_CAM)
.enableAutofocus(true)
.height(mySurfaceView.getHeight())
.width(mySurfaceView.getWidth())
.build();
}
4. Initialize it inside onResume()
#Override
protected void onResume() {
super.onResume();
// Init and Start with SurfaceView
// -------------------------------
qrEader.initAndStart(mySurfaceView);
}
There are many more possibilities you can do with this library, so I recommend you to visit the GitHub repository and check it out. It's worth a shot!

How to change Vuforia AR camera focus mode?

I am using Vuforia 6.2 AR SDK for in Unity. But while I test the application in Android phone the camera seems like blurry. I searched in Vuforia's developer website and found some camera focus mode but I can't implement because that guideline was for older Vuforia SDK, I can't find the script they mentioned in their website. Here is their code sample but it's not working. I created different script and run this line on Start() function, but still not working.
CameraDevice.Instance.SetFocusMode(
CameraDevice.FocusMode.FOCUS_MODE_CONTINUOUSAUTO);

try this
void Start ()
{
VuforiaARController.Instance.RegisterVuforiaStartedCallback(OnVuforiaStarted);
VuforiaARController.Instance.RegisterOnPauseCallback(OnPaused);
}
private void OnVuforiaStarted()
{
CameraDevice.Instance.SetFocusMode(
CameraDevice.FocusMode.FOCUS_MODE_CONTINUOUSAUTO);
}
private void OnPaused(bool paused)
{
if (!paused) // resumed
{
// Set again autofocus mode when app is resumed
CameraDevice.Instance.SetFocusMode(
CameraDevice.FocusMode.FOCUS_MODE_CONTINUOUSAUTO);
}
}

This code is the right code.
bool cameramode = false;
public void OnCameraChangeMode()
{
Vuforia.CameraDevice.CameraDirection currentDir = Vuforia.CameraDevice.Instance.GetCameraDirection();
if (!cameramode) {
RestartCamera(Vuforia.CameraDevice.CameraDirection.CAMERA_FRONT);
camBtnTxt.text = "Back Camera";
} else {
RestartCamera(Vuforia.CameraDevice.CameraDirection.CAMERA_BACK);
camBtnTxt.text = "Front Camera";
}
}
private void RestartCamera(Vuforia.CameraDevice.CameraDirection newDir)
{
Vuforia.CameraDevice.Instance.Stop();
Vuforia.CameraDevice.Instance.Deinit();
Vuforia.CameraDevice.Instance.Init(newDir);
Vuforia.CameraDevice.Instance.Start();
}

How to observe network changes in RxAndroid

I’m using the code given here.
I put those code blocks as classes in my project’s util package. And then in the main activity class I wrote this..
class MenuActivity {
// Variable declaration
private final CompositeSubscription mConnectionSubscription = new CompositeSubscription();
#Override
protected void onCreate(Bundle savedInstanceState) {
// Some initialisation of UI elements done here
mConnectionSubscription.add(AppObservable.bindActivity(this, NetworkUtils.observe(this)).subscribe(new Action1<NetworkUtils.State>() {
#Override
public void call(NetworkUtils.State state) {
if(state == NetworkUtils.State.NOT_CONNECTED)
Timber.i("Connection lost");
else
Timber.i("Connected");
}
}));
}
My goal is to monitor the changes and change a variable MyApp.isConnected defined in the MyApp class statically whenever the network changes to true false. Help would be appreciated. Thank you 😄

You asked me for an answer in another thread. I'm answering late, because I needed some time to develop and test solution, which I find good enough.
I've recently created new project called ReactiveNetwork.
It's open-source and available at: https://github.com/pwittchen/ReactiveNetwork.
You can add the following dependency to your build.gradle file:
dependencies {
compile 'com.github.pwittchen:reactivenetwork:x.y.z'
}
Then, you can replace x.y.z with the latest version number.
After that, you can use library in the following way:
ReactiveNetwork.observeNetworkConnectivity(context)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Action1<ConnectivityStatus>() {
#Override public void call(Connectivity connectivity) {
if(connectivity.getState() == NetworkInfo.State.DISCONNECTED) {
Timber.i("Connection lost");
} else if(connectivity.getState() == NetworkInfo.State.CONNECTED) {
Timber.i("Connected");
}
}
});
You can also use filter(...) method from RxJava if you want to react only on a single type of event.
You can create a subscription in onResume() method and then unsubscribe it in onPause() method inside Activity.
You can find more examples of usage and sample app on the website of the project on GitHub.
Moreover, you can read about NetworkInfo.State enum from Android API, which is now used by the library.

Try to use rxnetwork-android:
public class MainActivity extends AppCompatActivity{
private Subscription sendStateSubscription;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Observable<RxNetwork.State> sendStateStream =
RxNetwork.stream(this);
sendStateSubscription = AppObservable.bindActivity(
this, sendStateStream
).subscribe(new Action1<RxNetwork.State>() {
#Override public void call(RxNetwork.State state) {
if(state == RxNetwork.State.NOT_CONNECTED)
Timber.i("Connection lost");
else
Timber.i("Connected");
}
});
}
#Override protected void onDestroy() {
sendStateSubscription.unsubscribe();
sendStateSubscription = null;
super.onDestroy();
}
}

Detecting new MMS (Android 2.1)

I'd like to recognize arrival of new MMS msg (after it is downloaded to inbox). I am doing the following:
private MMSContentObserver mMmsCO;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
h = new Handler();
mMmsCO = new MMSContentObserver(h);
getContentResolver().registerContentObserver (Uri.parse("content://mms"), true, mMmsCO);
}
where
private class MMSContentObserver extends ContentObserver {
public MMSContentObserver(Handler h) {
super(h);
}
#Override
public boolean deliverSelfNotifications() {
return false;
}
#Override
public void onChange(boolean selfChange) {
super.onChange(selfChange);
}
}
However, onChange is not getting called. What am I missing?
Thanks in advance.

The MMS content provider isn't part of the SDK but it can be used... a real answer here would be nice since all messaging apps use content://mms in some way or shape.
Since google decided not to standardize MMS we are all have to test on every phone out there but we still need to be able to handle MMSs in our apps.