This is for an app I am newly uploading to Google Play, hence only. There doesn't seem to be any issue with updating old apps with. When I created an.
The app downloaded properly once, for the very first time I uploaded an internal testing build to Google Play, but when I uploaded a new version and updated through Google Play, the crashing began to occur. Uploading new versions causes the same issue. When updating the app, a notification will appear showing that the phone is downloading an additional file. The app will crash if it is opened before the download is finished as well as if it is opened after the download is finished.
I do not use the Ren'Py-created android. Instead, I use a. Edit to add more info: I just tested this by trying to update an app currently on Google Play with an. You can add renpytom gmail. I see the crash. I've sent a download link to the files to the provided email. Can you send me the files you used to build the game? Clean out the pack asset directory when building a game. If you don't see class and function-level information in native stack traces, you may need to generate a native debug symbols file and upload it to the Google Play Console.
For more information, see Deobfuscate crash stack traces. For general information on native crashes, see Diagnosing native crashes. Development environments tend to have more resources, such as bandwidth, memory, and storage. If you have an OutOfMemoryError , then you could create an emulator with low memory capacity to test with. Figure 2 shows the AVD manager settings where you can control the amount of memory on the device. Since users frequently move in and out of mobile or WiFi network coverage, in an application network exceptions usually should not be treated as errors , but rather as normal operating conditions that happen unexpectedly.
If you need to reproduce a network exception, such as an UnknownHostException , then try turning on airplane mode while your application attempts to use the network. You can use the Speed and Latency settings on AVD manager, or you can start the emulator with the -netdelay and -netspeed flags, as shown in the following command-line example:.
This example sets a delay of 20 seconds on all network requests and an upload and download speed of For more information on command-line options for the emulator, see Start the emulator from the command line.
Once you are able have the steps to reproduce the crash, you can use a tool like logcat to get more information. The logcat output will show you what other log messages you have printed, along with others from the system. Null pointer exceptions identified by the runtime error type NullPointerException occur when you're trying to access an object that is null, typically by invoking its methods or accessing its members. Null pointer exceptions are the largest cause of app crashes on Google Play.
The purpose of null is to signify that the object is missing - for example, it hasn't been created or assigned yet. To avoid null pointer exceptions, you need to make sure that the object references you're working with are non-null before calling methods on them or trying to access their members.
If the object reference is null, handle this case well for example, exit from a method before performing any operations on the object reference and write information to a debug log. Because you don't want to have null checks for every parameter of every method called, you can rely on the IDE or on the type of the object to signify nullability.
Annotate your methods' parameters and return values with Nullable and NonNull to receive compile time warnings from the IDE. These warnings prompt you to expect a nullable object:.
These null checks are for objects that you know could be null. An exception on a NonNull object is an indication of an error in your code that needs to be addressed. Because nullability should be meaningful, you can embed it in the types you use so that there is a compile time check for null. If you know an object can be null and that nullability should be handled, you could wrap it in an object like Optional. You should always prefer types that convey nullability. In Kotlin, nullability is part of the type system.
For example, a variable needs to be declared from the beginning as nullable or non-nullable. Nullable types are marked with a? Non-nullable variables cannot be assigned a null value and nullable variables need to be checked for nullability before being used as non-null. If you don't want to check for null explicitly, you can use the?. As a best practice, make sure you address the null case for a nullable object, or your app could get into unexpected states.
If your application won't crash anymore with NullPointerException , you won't know that these errors exist. Due to smart-cast and the null check, the Kotlin compiler knows that the string value is non-null so it allows you to use the reference directly, without the need for the safe call operator.
This operator allows you to state "if the object is non-null, return the object; otherwise, return something else". You can still get a NullPointerException in Kotlin. The following are the most common situations:. Platform types are object declarations coming from Java. These types are specially-treated ; null checks are not as enforced, so the non-null guarantee is the same as in Java. When you access a platform type reference, Kotlin does not create compile time errors but these references can lead to runtime errors.
See the following example from the Kotlin documentation:. Kotlin relies on type inference when a platform value is assigned to a Kotlin variable, or you can define what type to expect.
The best way to ensure the correct nullability state of a reference coming from Java is to use nullability annotations for example, Nullable in your Java code. The Kotlin compiler will represent these references as actual nullable or non-nullable types, not as platform types.
Types coming from this SDK, that are used in Kotlin, will be represented as correct nullable or non-nullable types. Because of Kotlin's type system, we've seen apps have a major reduction in NullPointerException crashes. Content and code samples on this page are subject to the licenses described in the Content License. App Basics. Build your first app. App resources. Resource types. App manifest file. Device compatibility.
Multiple APK support. Tablets, large screens, and foldables. Build responsive UIs. Build for foldables. Getting started. Handling data. User input. Watch Face Studio. Health services. Creating watch faces. Android TV. Build TV Apps. Build TV playback apps. A good practice in creating responsive applications is to make sure your main UI thread does the minimum amount of work.
Any potentially long task that may hang your application should be handled in a different thread background thread. Typical examples of such tasks are network operations, which involve unpredictable delays.
Users will tolerate some pauses, especially if you provide feedback that something is in progress, but a frozen application gives them no clue. In this article , we will create a simple image downloader that illustrates this pattern. You can see also this simular SO thread that deals with lazy loading operation. The exception that is thrown when an application attempts to perform a networking operation on its main thread.
This is only thrown for applications targeting the Honeycomb SDK or higher. Applications targeting earlier SDK versions are allowed to do networking on their main event loop threads, but it's heavily discouraged.
See the document Designing for Responsiveness. For more details please visit Android developer site. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Android app crashes as soon as i download image Ask Question. Launch the app to see whether the problem persists.
If nothing else worked, a factory reset might be in order. Note that you will lose all data, apps, and settings on your device. Create a backup for your files and activate it once the reset has been performed. If your apps keep crashing, try using the methods described above. One of them will surely help you fix the problem. What do you do when your favorite apps start crashing and freezing? Did you find another solution to the issue? Tell us how you fix crashing apps in the comments below.
Your email address will not be published. How to Fix Apps Crashing on Android Android smartphones and tablets are popular around the world because of their versatility and an enormous number of available apps.
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