启动新活动会导致stackoverflowError

Question

我正在尝试创建应用内反馈电子邮件。我有以下功能：

public void sendEmail(){
    Intent i = new Intent(Intent.ACTION_SEND);
    i.setType("message/rfc822");
    i.putExtra(Intent.EXTRA_EMAIL  , new String[]{"recipient@example.com"});
    i.putExtra(Intent.EXTRA_SUBJECT, "subject of email");
    i.putExtra(Intent.EXTRA_TEXT   , "body of email");
    try {
        startActivity(Intent.createChooser(i, "Send mail..."));
    } catch (android.content.ActivityNotFoundException ex) {
        Toast.makeText(getActivity(), "There are no email clients installed.",        Toast.LENGTH_SHORT).show();
    }
}

但是，当我调用此方法时，会启动一个新活动，我会得到StackoverflowError之类的：

09-16 13:44:31.923: E/AndroidRuntime(1079): FATAL EXCEPTION: main
09-16 13:44:31.923: E/AndroidRuntime(1079): Process: com.example.demo, PID: 1079
09-16 13:44:31.923: E/AndroidRuntime(1079): java.lang.StackOverflowError
09-16 13:44:31.923: E/AndroidRuntime(1079):     at com.example.demo.database.MySQLiteHelper.close(MySQLiteHelper.java:59)
09-16 13:44:31.923: E/AndroidRuntime(1079):     at com.example.demo.database.MySQLiteHelper.close(MySQLiteHelper.java:59)
09-16 13:44:31.923: E/AndroidRuntime(1079):     at com.example.demo.database.MySQLiteHelper.close(MySQLiteHelper.java:59)
09-16 13:44:31.923: E/AndroidRuntime(1079):     at com.example.demo.database.MySQLiteHelper.close(MySQLiteHelper.java:59)

你们有什么建议吗？提前谢谢。