跳过屏幕

Question

因此，我正在为我的编程课开发一个项目，该项目要求我们创建一个登录屏幕，一个用户输入生日和其他信息的屏幕以及一个空白屏幕（稍后将做更多，不过此刻这只是一个空白屏幕）。当我启动我的应用并正确输入登录信息时，它会跳过第二个屏幕，直接进入空白屏幕，我不确定为什么会这样做。这是登录屏幕MainActivity的代码：

public enum LoginSuccess {
    login(1),
    password(2),
    success(0);

    private int intValue;

    LoginSuccess(int value){
        intValue = value;
    }

    public int getIntValue(){
        return intValue;
    }

}

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

    final TextView txtLogin = (TextView) findViewById(R.id.idLoginText);
    final TextView txtPassword = (TextView) findViewById(R.id.idPassword);
    Button btnLogin = (Button) findViewById(R.id.btnLogin);


    btnLogin.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast toastError = null;

            switch(CheckLogin(txtLogin.getText().toString(), txtPassword.getText().toString())){
                case login:
                    toastError.makeText(getApplicationContext(), getString(R.string.errMessageLogin), toastError.LENGTH_LONG).show();
                    txtLogin.requestFocus();
                    break;
                case password:
                    toastError.makeText(getApplicationContext(), getString(R.string.errMessagePassword), toastError.LENGTH_LONG).show();
                    txtPassword.requestFocus();
                    break;
                default:
                    startActivity(new Intent(MainActivity.this, MainClassList.class));


            }
        }
    });
}


LoginSuccess CheckLogin(String txtLogin, String txtPassword){
    String holdLogin = "Codie";
    String holdPassword = "password";

    if (!holdLogin.equals(txtLogin)){
        return LoginSuccess.login;
    }

    if (!holdPassword.equals(txtPassword)){
        return LoginSuccess.password;
    }

    return LoginSuccess.success;

}
}

这是第二个屏幕MainClassList的代码：

@Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main_class_list);
       final Switch swDegreeCert = (Switch) findViewById(R.id.swDegreeCert);
       final Spinner spnDegree = (Spinner) findViewById(R.id.spnDegree);
       final Spinner spnCertificate = (Spinner) findViewById(R.id.spnCertificate);
       final TextView txtCertificate = (TextView) findViewById(R.id.lblCertificate);
       final TextView txtDegree = (TextView) findViewById(R.id.lblDegree);
       final Button btnNext = (Button) findViewById(R.id.btnNext);

    final EditText firstName = (EditText) findViewById(R.id.txtFirstName);
    final EditText lastName = (EditText) findViewById(R.id.txtLastName);
    final EditText phone = (EditText) findViewById(R.id.txtPhone);

    final Spinner spMonth = (Spinner) findViewById(R.id.spnMonth);
    final EditText txtDay = (EditText) findViewById(R.id.txtDay);
    final EditText txtYear = (EditText) findViewById(R.id.txtYear);

    firstName.requestFocus();

    swDegreeCert.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if (isChecked){
                spnDegree.setVisibility(View.VISIBLE);
                txtDegree.setVisibility(View.VISIBLE);
                spnCertificate.setVisibility(View.GONE);
                txtCertificate.setVisibility(View.GONE);
            } else {
                spnDegree.setVisibility(View.GONE);
                txtDegree.setVisibility(View.GONE);
                spnCertificate.setVisibility(View.VISIBLE);
                txtCertificate.setVisibility(View.VISIBLE);
            }
        }
    });

    btnNext.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (checkData()){
                String doBirth = "";
                doBirth = spMonth.getSelectedItem().toString() + "/" + txtDay.getText().toString() + "/" + txtYear.getText().toString();

                // old way
                // startActivity(new Intent(MainClassList.this, ChooseClass.class);

                //new way
                Intent nextScreen = new Intent(MainClassList.this, ChooseClass.class);
                nextScreen.putExtra("FirstName", firstName.getText().toString());
                nextScreen.putExtra("LastName", lastName.getText().toString());
                nextScreen.putExtra("Phone", phone.getText().toString());
                nextScreen.putExtra("BirthDate", doBirth);

                if (spnDegree.getVisibility() == View.VISIBLE){
                    nextScreen.putExtra("isDegreeCert", "Degree");
                    nextScreen.putExtra("degreeCert", spnDegree.getSelectedItem().toString());

                } else {
                    nextScreen.putExtra("isDegreeCert", "Certificate");
                    nextScreen.putExtra("degreeCert", spnCertificate.getSelectedItem().toString());
                }
                //Start Activity
                startActivity(nextScreen);

            }
        }
    });
}



private boolean checkData(){
    final EditText firstName = (EditText) findViewById(R.id.txtFirstName);
    final EditText lastName = (EditText) findViewById(R.id.txtLastName);
    final EditText phone = (EditText) findViewById(R.id.txtPhone);
    final EditText txtDay = (EditText) findViewById(R.id.txtDay);
    final EditText txtYear = (EditText) findViewById(R.id.txtYear);


    if(firstName.getText().toString().isEmpty()){
        //error
        firstName.setError("Invalid First Name");
        firstName.requestFocus();
        return false;
    }

    if(lastName.getText().toString().isEmpty()){
        lastName.setError("Invalid Last Name");
        lastName.requestFocus();
        return false;
    }

    if(phone.getText().toString().isEmpty()) {
        phone.setError("Invalid Phone Number");
        phone.requestFocus();
        return false;
    }

    if(txtDay.getText().toString().isEmpty()) {
        txtDay.setError("Invalid Date Selection");
        txtDay.requestFocus();
        return false;
    }

    if(txtYear.getText().toString().isEmpty()) {
        txtYear.setError("Invalid Date Selection");
        txtYear.requestFocus();
        return false;
    }

    return true;


}
}

第三类ChooseClass没有任何有效的代码。重申一下，该应用程序从MainActivity直接转到ChooseClass，我不知道为什么。任何帮助都将不胜感激。

这是我的清单：

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name=".MainClassList" />
    <activity android:name=".ChooseClass"></activity>
</application>

</manifest>