小编use*_*506的帖子

我是Android的新手,我被困在一个似乎是一个简单的问题修复,但我只是不知道我做错了什么!我需要做的只是注册一个用户,由于某种原因,e永远不会等于null,因此它会直接进入else部分,这会给我无效的会话令牌消息.这是注册部分的代码,我看了几千次!:

protected EditText mUsername;
protected EditText mPassword;
protected EditText mEmail;
protected Button mSignUpButton;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_sign_up_manager);

    mUsername = (EditText)findViewById(R.id.usernameField);
    mPassword = (EditText)findViewById(R.id.passwordField);
    mEmail = (EditText)findViewById(R.id.emailField);
    mSignUpButton = (Button)findViewById(R.id.signupButton);

    mSignUpButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String username = mUsername.getText().toString();
            String password = mPassword.getText().toString();
            String email = mEmail.getText().toString();

            //trims the spaces
            username = username.trim();
            password = password.trim();
            email = email.trim();

            //if one of the text edits is empty send them a message with a …