Toast not showing up in UnCaughtExceptionHandler

Question

I am using this code to handle any uncaught exceptions which might cause my application to crash.

public class ExceptionHandler implements java.lang.Thread.UncaughtExceptionHandler {
    private final Context myContext;

    public ExceptionHandler(Context context) {

        myContext = context;
    }

    public void uncaughtException(Thread thread, Throwable exception) {

        Toast.makeText(myContext,
                "The application has crashed, and a report is sent to the admin",
                Toast.LENGTH_SHORT).show();
        StringWriter stackTrace = new StringWriter();
        exception.printStackTrace(new PrintWriter(stackTrace));
        System.err.println(stackTrace);// You can use LogCat too
        Intent intent = new Intent(myContext, CrashActivity.class);
        myContext.startActivity(intent);
        Process.killProcess(Process.myPid());
        System.exit(10);
    }
}

When i run it with a known but uncaught exception(just to test), activity "CrashActivity" is called but the Toast which must come before it is not showing up.

Actually i wanted to show only Toast and then call myContext.finish(); instead of going to the CrashActivity. But that toast in not visible.

Where am i wrong?

Answer 1

You are probably calling the Toast from a thread while a toast should be called from the UI thread...

If this isn't helping, please provide us the logcat output so we can see what kind of error you are getting.