so i am working on android app programmed in java which shows a list of animals sounds in recycler view. The app works fine when i install it on my device from android studio but when i upload the apk to play console and install from play store the adapter becomes real mess and apps gets crashing untill i clear cache and app data from settings.
Here is what app looks like on first install from play store (https://i.stack.imgur.com/OTQkX.jpg)
When i clear cache and app data from settings and relaunch the app it works absolutely fine.(https://i.stack.imgur.com/HPbgM.jpg)
I have tries all possible solutions which i found online but they could not help. Can anybody explain why this occurs and whats the solution to this?
Update: Following #Tenfour4,s comment i switched to production build in android studio but surprisingly app is working fine . The issue only occurs when app is uploaded to play console and installed from there.
I downloaded the Pixel emulator and Android API 25, but when running it
appears for a few seconds and then disappears
In the Event Log, this is what appears
I need help pls
The same Problem got me a few months ago:
I fixed it by doing this:
Whenever you run the project or app you have to clear the data of that AVD
To wipe the data of Emulator follow these steps-
Go To AVD Manager then you will see all emulators there then simply wipe data. ie- like in this image shown.
step 1
step 2
step 3
I also had random emulator crashes, everything would work for a short while, but then the emulator would just disappear as if it had stopped. The emulator.exe would still be running task manager, no way to recover the window and the .lock file couldn't be removed.
Even just starting the emulator and swiping the home screen left and right (not even starting my app), or going into the the apps drawer and back would cause the the emulator to stop working properly.
What worked for me was to always start Android Studio as "Run as administrator". So right click on the startmenu shortcut and select Run as administrator.
Not sure why it randomly stops working otherwise, I'm sure the Android Studio QA team thoroughly tests this on real-world laptops outside of Google labs right...? /s
I am trying to pair my Sparkfun nRF52832 breakout board (programed through Arduino, using this link: nRF52832 Breakout Board Hookup Guide with a BLE android app (which I hope to make) so that I can turn on/off the LED on the board (baby steps). Since I am new to Bluetooth LE, I decided to use the BluetoothLeGatt source code on Android Studio. After going through the code, I understand how it works.
Picture of the BluetoothLeGatt source code sample page (image)
I connected my Samsung Galaxy S8+ and installed the BluetoothLeGatt source app to see if it can scan for the nRF52832. At first I got a red text in the logcat which said that I needed to give Coarse location permission, so I did that in the manifest.xml. Then I ran it again, but I still got the same red text in the logcat.
At first I googled the problem and found this somewhat similar question, however, I wasn't able to get a suitable answer. I also tried to see if I could find source code for the nRF connect app, however, that is also not available. So I'm super confused about what I should do to get rid of that and need help.
manifest.xml file with permissions (image)
Red text in logcat (image)
Thank you for taking the time to read my first post! I truly appreciate any help you can provide.
You need to request this permission in runtime.
More info: https://developer.android.com/training/permissions/requesting.html
I have made an android application and put adverts in using Google AdMob.
On Eclipse's Graphical Layout there is a white rectangle which says 'Ads by Google' in it, which shows that it has been set up properly.
However, when I run the app on the simulator and in real life, nothing shows up. Why would this be?
Thanks in advance!
You should make sure you have setup your Android Application properly with Ads, go over the following steps and ensure that you have done them correctly.
GoogleAdMob Jar in your libs folder
GoogleAdMob Activity in your manifest
GoogleAd AdView in your main activity XML file, with your adunitId correctly inputted
And Ensure your class in which your AdMob is coded in is correct.
Let me know if these steps help you or not.
I am new to java and android and wanted to see how developing for android works
I started by downloading the SDK FROM HERE
However after I finish making the Hello World project sample given in the website HERE, if I try to run it on the emulator as explained HERE, the emulator screen appears, but nothing seems to happen. I can see the word android on the middle of the screen with some animation happening, but that's it. The website says something about unlocking the emulator, but I have no idea what that means. What I have gathered from reading other posts is that the emulator is supposed to have some kind of slider switch as in real smart phones which should be dragged to unlock it, but I can't see it in my case. Now I have no idea why this is happening or what I should check out in order to fix this. Are there any installation logs or something else that I can check to see what the settings are?
What I have tried till now:
I downloaded the SDK ADT bundle from HERE and just unzipped it. Then looked for eclipse.exe and ran it directly. Is there anything else I should have done prior to this?
When I did it for the first time, I had only JRE installed and not JDK, which I realized after reading THIS POST. So I downloaded JDK from HERE, updated the required environment variables and restarted eclipse, but still it's the same thing.
I looked at the Eclipse isn't talking to the emulator section GIVEN HERE, but all it says is to restart eclipse and the emulator, and it doesn't do anything at all.
Rant:
I can understand if the program had failed to compile when I didn't have JDK , or if the IDE gave any indication at all of a faulty program install, but that isn't the case. Everything seems ok, there are no errors, but it just doesn't do anything. This is the type of thing that makes people pull their hair out, and personally, I think the With a single download, the ADT Bundle includes everything you need to begin developing apps: in the android website is very misleading, especially for complete beginners
Anyway, what should I do to make the tutorial program run on my computer? My computer is a bit old and slow so could that be an issue? My computer is Windows XP SP3 on Intel(R) Pentium(4) 4 CPU 3.20 GHz 3.19GHz 2.50GB RAM, but if that was the case I assume the emulator shouldn't even start up
You just have to wait a bit longer. Android loads pretty long on emulator.
Tutorial says about unlocking, because when Android is loaded, your screen on emulator will be locked.
If you find emulator too slow for you, you may want to check this topic out: Why is the Android emulator so slow? How can we speed up the Android emulator?
I had the exact same problem as you when I first got into Android development a week ago. The two things I did are simply
1) Set the usable RAM on your AVD to 768MB
2) When you run your Hello World program in your emulator, give it about 5-10 minutes. Don't touch or click the window at all, just let it load up. Later you can make it persist
3) If your home screen comes up, click and hold the mouse button in the center of the screen, then drag towards the sides and release, this should unlock the device.
Try these steps first, if they don't work then there is likely a problem with your AVD configuration.
If you are launching your app first time with emulator, it will take appropriate time.After that, on Lock icon click and slide to the right. then you can view you application. If not check for your app(icon) installed.
By seeing your configuration of PC I think it will take some time to load emulator. After emulator is load (see below image)
then and then run your code and also check in eclise-device that whether emulator is online or not.
For checking emulator in eclispe :
In second image just above windows logo you can see small rectangular button with plus sign click on that you will get list from which you can select devices. You can find similar button in you eclipse at the bottom.
I had the exact same problem and followed the exact same steps, but was also unsuccessful. I ended up creating a new AVD with a Nexus 4 instead of the latest Nexus 6. The resolution of the 4 is much lower, which I think is what solved my problem. It loaded much more quickly using the 4.
Also, When I was using the 6, I could only see "ndroi" because the size of the screen was much larger than the size of the phone. Now I can see the full device.
vs.
You may just need to relaunch the Android studio 3.6.3.
I got a similar problem. The hello world app does not install on the emulator.
Problem solved after relaunch.