How to solve the problem of application stopping?

Question

<p>I am developing an application and every time I run it I receive the following message: </p> <blockquote> <p>Sorry, MyApp has stopped running. </p> </blockquote> <p>What should I do to resolve this issue? </p> <hr/>

Provide more details. This question is intended to guide beginner Android programmers on how to try to solve the problem themselves, or ask the right questions. </em></p>

Answer 1

You can use Google's ADB tool to obtain the Logcat file to analyze the problem.

adb logcat > logcat.txt

Open the logcat.txt file and search for your application name. There should be information about the failure reason, line number, class name, etc.

Answer 2

This answer describes the process of retrieving a stack trace. Already have a stack trace? Read about stack traces in "What is a stack trace and how do I use it to debug errors in my application?"

question

Your application exited because an uncaught

RuntimeException was thrown. The most common of these is
NullPointerException.

How to solve?

Whenever an Android application crashes (or any Java application), a

stack trace is written to the console (logcat in this case). This stack trace contains important information needed to resolve the issue.

Android Studio

In the bottom bar of the window, click the

Logcat button. Alternatively, you can press alt 6. Make sure your emulator or device is selected in the Devices panel. Next, try to find the stack trace shown in red. There may be a lot logged in logcat, so you may want to scroll through it. An easy way to find the stack trace is to clear logcat (using the recycle bin on the right) and let the application crash again.

I found the stack trace, what now?

yeah! You are already halfway through the problem-solving process.

You just need to find out what exactly caused the application to crash by analyzing the stack trace.

Read about stack traces in "

What is a stack trace and how do I use it to debug errors in my application?".

I still can't solve my problem!

If you've found the

exception and the line where it occurs, and still can't figure out how to fix it, don't hesitate to ask on StackOverflow.

Try to be concise and clear: post the stack trace and

the relevant code (e.g., a few lines up from the line where the exception was thrown).