Using Global Exception Handling on android

Question

Is there a code example, or a tutorial on how to use the Thread.setDefaultUncaughtExceptionHandler method? Basically I'm trying to display a custom alert dialog, whenever an exception is thrown, in my application. Is it possible to do this? I know it's a little bit tricky to display something on the screen, if the exception is thrown in the UI thread but I don't know any work around for this.

Answer 1

Basic Example for someone who comes to this page with a solution :)

public class ChildActivity extends BaseActivity {     @SuppressWarnings("unused")     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         int a=1/0;     } } 

Class for handling error:

public class BaseActivity extends Activity{     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {             @Override             public void uncaughtException(Thread paramThread, Throwable paramThrowable) {                 Log.e("Alert","Lets See if it Works !!!");             }         });     } } 

Answer 2

Here's a variant of the answer by Mohit Sharma with the following improvements:

• Doesn't cause the app/service to freeze after error handling
• Lets Android do its normal error handling after your own

Code:

public class BaseActivity extends Activity {     @Override     public void onCreate() {         super.onCreate();          final Thread.UncaughtExceptionHandler oldHandler =             Thread.getDefaultUncaughtExceptionHandler();          Thread.setDefaultUncaughtExceptionHandler(             new Thread.UncaughtExceptionHandler() {                 @Override                 public void uncaughtException(                     Thread paramThread,                     Throwable paramThrowable                 ) {                     //Do your own error handling here                      if (oldHandler != null)                         oldHandler.uncaughtException(                             paramThread,                             paramThrowable                         ); //Delegates to Android's error handling                     else                         System.exit(2); //Prevents the service/app from freezing                 }             });     } }