'AsyncTask'-derived class that handles RuntimeExceptions and throws them on the UI thread

ErrorHandlingTask.java

package app.meetling.io;

import android.os.AsyncTask;

/**
 * <code>AsyncTask</code> that handles RuntimeExceptions and throws them on the UI thread. Use
 * <code>doInBgCatchError</code> for computation code. If you overwrite <code>onPostExecute<code>,
 * call <code>super<code> to handle errors. For <code>try-with-resources</code>, overwrite
 * <code>doInBackground()<code> and set error manually.
 */
abstract class ErrorHandlingTask<Params, Progress, Result>
        extends AsyncTask<Params, Progress, Result> {
    private RuntimeException mError;

    public void setError(RuntimeException e) {
        mError = e;
    }

    @Override
    protected Result doInBackground(Params... params) {
        try {
            return doInBgCatchError(params);
        } catch (RuntimeException e) {
            setError(e);
            return null;
        }
    }

    protected Result doInBgCatchError(Params... params) {
        return null;
    }

    @Override
    protected void onPostExecute(Result result) {
        if (mError != null) {
            throw mError;
        }
    }
}