获取CrashHandler的信息

private StringgetStackTrace(Throwable th) {

final Writer result =new StringWriter();

    final PrintWriter printWriter =new PrintWriter(result);

    // If the exception was thrown in a background thread inside

// AsyncTask, then the actual exception can be found with getCause

    Throwable cause = th;

    while (cause !=null) {

cause.printStackTrace(printWriter);

        cause = cause.getCause();

    }

final String stacktraceAsString = result.toString();

    printWriter.close();

    return stacktraceAsString;

}