I have an Android app that serves content via webview. I've implemented a network connectivity alert so if my users are in a location where they can't get internet, I show a message. This takes place inside the onReceivedError method. It works as expected; if I disable all internet connections, I get a warning message. However, even when internet connection exists, the warning message still shows. If I minimize my app, open the native browser and visit 8-10 links, when I switch back to my app, I am given the network warning even though the device is connected to the network.
This only happens on one of my 6 test devices (my current phone, a Samsung Galaxy S10e. The problem does not occur on 5 different Android devices, both newer and older. I'm just looking for a way to ignore the warning when the app is in the background state. I've searched for an easy way to do this, but I haven't found anything simple that doesn't involve writing a new class.
How can I write a conditional statement to do nothing when the onReceivedError method is triggered while the app is in the background? Here is a portion of my code, along with what I would like to have happen:
#override
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
// the part I need help with
if ("app in background"){
// do nothing
} else {
// this is where I have employed my notification, a snackbar
}
}
Thank you for your help!
Related
As soon as I receive a push notification from my app I want to trigger the KeyguardManager to launch the fingerprint/pass code screen to open the phone from lock screen so that person can enter the phone and unlock the device.
I want to trigger this programmatically similar to when we click on any notification from lock screen we get the fingerprint/pass-code screen.
I did a lot of RnD but didn't find any solution, this is one of the challenging use case task given to me in class, I have been exploring a lot from quite few weeks with no success at all.
Did tried Broadcast receiver with BiometricManager and many things with no success, any lead will be very helpful.
As soon as you receive push message, onNotificationReceived() (or some other method if you use some 3rd party libs) method gets called as below. from there, you can launch your Main screen where you have written biometric/unlocking code.
class MyReceiver : PushReceiver {
override fun onNotificationReceived(message: Message) : Boolean {
//Launch your MainActivity where you can show Unlock screen.
return super.onNotificationReceived(message);
}
}
So I am making an app that has to check for some information, but I need to be able to do that while the app is killed/not actively running. So basically like Youtube's notifications or something. I am a beginner and watched some tutorials on FCM, which can send a notification while the app is killed, which is fine. However, I need to be able to periodically make API calls, check if a certain condition is true and send the notification if so (all of that while app is not running). I tried googling that and found nothing that can help me. So... any ideas? (No code included since I don't think it's relevant.)
If this condition only affects the display of notifications, you can simply check the condition when you receive a notification through FCM. Here's an example :
class FCMService : FirebaseMessagingService()
{
override fun onMessageReceived(message: RemoteMessage)
{
val myCondition = getConditionFromAPI()
if (myCondition) {
showNotification(message)
}
}
}
Use AlarmManager to request periodic runs of your code. It may be set up to broadcast a message time to time to your receiver (declared in AndroidManifest.xml or in your code).
It will work while device is on. To continue after reboot, you have to set up a receiver for Intent.ACTION_BOOT_COMPLETED and register it in your code (not in AndroidManifest.xml, as it no longer works in latest versions of Android).
I have voice recognition code that crashes upon launch (after the splashscreen). My app works great without voice recognition, but it is required for this app that I have it.
This Acer Chromebook 10 outside of my development has no issue with voice recognition (Okay Google, what time is it... etc.)
Here is a partial screenshot of the error I am getting from logcat on the Chromebook:
I have added permissions in the manifest (before I added this it worked on the Pixel 2XL):
<addPermission android:name="android.permission.BIND_VOICE_INTERACTION"/>
... but still get the same error. I am not launching a competing service, but rather a thread runnable activity. Here is a snippet of the code that I think that may be throwing this error (it crashes right after the splash screen so I don't even get the catch response):
try
{
_activity.runOnUiThread(new Runnable()
{
public void run()
{
// I don't know why, but we have to destroy and redo the recognizer after a failure (unlike onResult), then works great.
mSpeechRecognizer.destroy();
mSpeechRecognizer.setRecognitionListener(recognitionListener);
mSpeechRecognizerIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, "en-US");
mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
}
});
} // end of try
catch (Exception e)
{
Log.debug("Recognition failed with exception " + e.getMessage());
}
Some background - like the title says this code is working with Pixel 2XL. It is part of an in-house plugin that I've written for the Unreal Engine to support voice recognition. As such I test for the permission "android.permission.BIND_VOICE_INTERACTION" in Blueprints (a flowchart-like language for UE4) when running the code on my Pixel and it comes back true - so I know this permission is okay with the Pixel 2XL.
I get the impression that there may be a competing service causing conflict on the Chromebook specifically (ArcVoiceInteractionService?) and if this is so, I need to find out how to get around it.
I'm making an android app that test if certain security features on your phone are enabled. For example, if you have password log in enabled or if your data is encrypted on your phone.
For some reason, the app has to be ran twice to test and see if these security features are enabled on the phone or not, and this is the problem I'm trying to solve. I'd like it to test and see if the security features are enabled when the app is created and the first time the app is run, not the second time it is run.
I test if these features are enabled in the onStart() function in my MainActivity file. I included the functions code below:
#Override
#TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
#SuppressLint("NewApi")
public void onStart()
{
super.onStart();
//determine if phone uses lock pattern
//It returns 1 if pattern lock enabled and 0 if pin/password password enabled
ContentResolver cr = getBaseContext().getContentResolver();
lockPatternEnable = Settings.Secure.getInt(cr, Settings.Secure.LOCK_PATTERN_ENABLED, 0);//Settings.System
//returns 1 if pin/password protected. 0 if not
KeyguardManager keyguardManager = (KeyguardManager) getBaseContext().getSystemService(Context.KEYGUARD_SERVICE);
if( keyguardManager.isKeyguardSecure())
{
//it is pin or password protected
pinPasswordEnable=1;
}
else
{
//it is not pin or password protected
pinPasswordEnable=0;
}//http://stackoverflow.com/questions/6588969/device-password-in-android-is-existing-or-not/18716253#18716253
//determine if adb is enabled. works
adb=Settings.Global.getInt(cr, Settings.Global.ADB_ENABLED, 0);
//determine if bluetooth is enabled.works
bluetooth=Settings.Global.getInt(cr, Settings.Global.BLUETOOTH_ON, 0);
//Settings.System BLUETOOTH_DISCOVERABILITY
//determine if wifi is enabled. works
WifiManager wifi = (WifiManager)getSystemService(Context.WIFI_SERVICE);
if (wifi.isWifiEnabled())
{
//wifi is enabled
wifiInt=1;
}
else
wifiInt=0;
//determine if data is encrypted
getDeviceEncryptionencryption();
//determine if gps enabled
}//end of onStart() function
If any more code needs to be posted to answer this question, just let me know, and thanks for your help. Maybe the issue has something to do with the super.onStart();
Does anyone think that a splash loading screen might help solve the issue?
super.onStart(); is fine. Splash screen will not help.
From your code I do not see how you determine how many times it ran.
You also mention testing - is it manual testing or you use any framework? Maybe your framework has some init method which runs before each run and it makes this extra call for onStart().
Issues is not in this code. Use debugger or logcat and figure out who calls you twice and, as #nasch had asked, what happens at first run.
Still, real question to help you remains - what do you mean "call twice". Is it you manually clicking app icon twice or is it some testing framework calls your app twice. Both cases are clear to solve.
I have the following problem with the libusb-java and some self-made devices.
It could happen that such a device disconnects from the USB Port because it drains to much power (as an example: i have a USB-LED Light which needs sometimes more than 500mA).
In this case the USB Controller will reset the device and the device will startup normaly again.
Now i cant really detect such a problem except for trying to reinit the device on every Exception. But thats not working...
On Every Exception i call my init Method again, which looks like this:
private void initDevice() {
USB.init();
this.dev = USB.getDevice(idVendor, idProduct);
}
The Problem with that is, this runs without any problem, but the i get this error message when i want to send new data:
LibusbJava.controlMsg: error sending control message: Protocol error
How do i can reinit the device? Do i have to reset the bus or something?
You will need to call open() on the device - it is new for the system.