Question

I am using an AsyncTask to read data from a file. I get the aforementioned error when I run the application.

The error messages are:

03-29 20:06:08.445: E/AndroidRuntime(13191):
java.lang.ExceptionInInitializerError 03-29 20:06:08.445:
E/AndroidRuntime(13191):
at
com.google.app.BouncingBall.HighScore.loadFromFile(HighScore.java:81)
03-29 20:06:08.445: E/AndroidRuntime(13191):
at
com.google.app.BouncingBall.HighScore.(HighScore.java:24) 03-29
20:06:08.445: E/AndroidRuntime(13191): at
com.google.app.BouncingBall.BouncingBallActivity$BouncingBallView.init(BouncingBallActivity.java:185)
03-29 20:06:08.445: E/AndroidRuntime(13191): at
com.google.app.BouncingBall.BouncingBallActivity$BouncingBallView.run(BouncingBallActivity.java:173)
03-29 20:06:08.445: E/AndroidRuntime(13191): at
java.lang.Thread.run(Thread.java:1019) 03-29 20:06:08.445:
E/AndroidRuntime(13191): Caused by: java.lang.RuntimeException: Can’t
create handler inside thread that has not called Looper.prepare()
03-29 20:06:08.445: E/AndroidRuntime(13191): at
android.os.Handler.(Handler.java:121)

The Code

private void loadFromFile()
    {
        new AsyncDataStorage().execute(FILENAME);
    }


class AsyncDataStorage extends AsyncTask<String, Integer, Boolean> {

        protected Boolean doInBackground(String... args) {
            try {
                FileInputStream fis = context.openFileInput(FILENAME);
                byte[]  raw = new byte[fis.available()];
                String rawData=null;
                while(fis.read()!=-1)
                {
                    rawData = new String(raw);
                }
                return (processRawData(rawData));
            } catch (FileNotFoundException e) {
                e.printStackTrace();
                return false;
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
                return false;
            }

        }

Answer 1

Simply wrap every call to com.google.app.BouncingBall.HighScore.loadFromFile or the creation of AsyncTask within it in a Runnable, and post it to a Handler bound to the UI thread.