Unfortunately MyApp has stopped. How can I solve this? – Dev

The best answers to the question “Unfortunately MyApp has stopped. How can I solve this?” in the category Dev.

QUESTION:

I am developing an application, and everytime I run it, I get the message:

Unfortunately, MyApp has stopped.

What can I do to solve this?


About this question – obviously inspired by What is a stack trace, and how can I use it to debug my application errors?, there are lots of questions stating that their application has crashed, without any further detail. This question aims to instruct novice Android programmers on how to try and fix their problems themselves, or ask the right questions.

ANSWER:

You can use Google’s ADB tool to get Logcat file to analyze the issue.

adb logcat > logcat.txt

open logcat.txt file and search for your application name. There should be information on why it failed, the line number, Class name, etc.

ANSWER:

This answer describes the process of retrieving the stack trace. Already have the stack trace? Read up on stack traces in “What is a stack trace, and how can I use it to debug my application errors?”

The Problem

Your application quit because an uncaught RuntimeException was thrown.
The most common of these is the NullPointerException.

How to solve it?

Every time an Android application crashes (or any Java application for that matter), a Stack trace is written to the console (in this case, logcat). This stack trace contains vital information for solving your problem.

Android Studio

Finding the stack trace in Android Studio

In the bottom bar of the window, click on 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, which is shown in red. There may be a lot of stuff logged into logcat, so you may need to scroll a bit. An easy way to find the stack trace is to clear the logcat (using the recycle bin on the right), and let the app crash again.

I have found the stack trace, now what?

Yay! You’re halfway to solving your problem.
You only need to find out what exactly made your application crash, by analyzing the stack trace.

Read up on stack traces in “What is a stack trace, and how can I use it to debug my application errors?”

I still can’t solve my problem!

If you’ve found your Exception and the line where it occurred, and still cannot figure out how to fix it, don’t hesitate to ask a question on StackOverflow.

Try to be as concise as possible: post the stack trace, and the relevant code (e.g. a few lines up to the line which threw the Exception).

ANSWER:

Just check the error in log cat.

You get the log cat option from in eclipse:

window->show view->others->Android->Logcat

Log cat contains error.

Other wise you can also check the error by executing an application in debug mode.
Firstly set breakpoint after that by doing:

right click on project->debug as->Android application

ANSWER:

First, you check which point your app has crashed (Unfortunately, MyApp has stopped.). For this, you can use Log.e("TAG", "Message");, using this line you can see your app log in logcat.

After that, you find which point your app has stopped it’s very easy to solve at your side.