Question

当我点击注册按钮时，Android Studio正在显示再次打开应用应用崩溃该应用程序运行正常，但是当我单击注册按钮时它崩溃了，也想在注册后启动新活动，但错误是com

我认为按钮点击监听器或验证码存在问题，但不知道此错误的来源。

以下是我的 java文件代码：

public class SignUp extends AppCompatActivity {
    private static final String TAG = "SignUp";
    private Vibrator vib;
    Animation animShake;
    private EditText signupInputName, signupInputEmail, signupInputPassword, signupInputDOB;
    private TextInputLayout signupInputLayoutName, signupInputLayoutEmail, signupInputLayoutPasword, signupInputLayoutDOB;
    private Button btnSignUp;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.sign_up_form);
        signupInputLayoutName = (TextInputLayout) findViewById(R.id.sign_up_name);
        signupInputLayoutName = (TextInputLayout) findViewById(R.id.sign_up_email);
        signupInputLayoutName = (TextInputLayout) findViewById(R.id.sign_up_Password);
        signupInputLayoutName = (TextInputLayout) findViewById(R.id.sign_up_DOB);

        signupInputName = (EditText) findViewById(R.id.signup_input_name);
        signupInputName = (EditText) findViewById(R.id.signup_input_email);
        signupInputName = (EditText) findViewById(R.id.signup_input_Password);
        signupInputName = (EditText) findViewById(R.id.signup_input_DOB);

        btnSignUp = (Button) findViewById(R.id.btn_signUp);
        animShake = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.shake);
        vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);

        btnSignUp.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                register();
            }
        });
    }

    public void register() {
        submitForm();
        {
            if (!checkName() || !checkEmail() || !checkDOB() || !checkPassword()) {
                Toast.makeText(this, "signup failed", Toast.LENGTH_SHORT).show();
            } else {
                onSignupSuccess();
            }
        }
    }

    public void onSignupSuccess() {
        Intent intent = new Intent(SignUp.this, tab1Petrol.class);
        startActivity(intent);
        finish();
    }

    private void submitForm() {
        if (!checkName()) {
            signupInputName.setAnimation(animShake);
            signupInputName.startAnimation(animShake);
            vib.vibrate(125);
            return;
        }
        if (!checkEmail()) {
            signupInputEmail.setAnimation(animShake);
            signupInputEmail.startAnimation(animShake);
            vib.vibrate(125);
            return;
        }
        if (!checkPassword()) {
            signupInputPassword.setAnimation(animShake);
            signupInputPassword.startAnimation(animShake);
            vib.vibrate(125);
            return;
        }
        if (!checkDOB()) {
            signupInputDOB.setAnimation(animShake);
            signupInputDOB.startAnimation(animShake);
            vib.vibrate(125);
            return;
        }
        signupInputLayoutName.setErrorEnabled(false);
        signupInputLayoutEmail.setErrorEnabled(false);
        signupInputLayoutPasword.setErrorEnabled(false);
        signupInputLayoutDOB.setErrorEnabled(false);
        Toast.makeText(this, "you are successfully Registered", Toast.LENGTH_SHORT).show();
    }

    private boolean checkName() {
        if (signupInputName.getText().toString().trim().isEmpty()) {
            signupInputLayoutName.setErrorEnabled(true);
            signupInputLayoutName.setError("Please enter a Name");
            signupInputName.setError("valid Input Required");
            return false;
        }
        signupInputLayoutName.setErrorEnabled(false);
        return true;
    }

    private boolean checkEmail() {
        String email = signupInputEmail.getText().toString().trim();
        if (email.isEmpty() || !isValidEmail(email)) {
            signupInputLayoutEmail.setErrorEnabled(true);
            signupInputLayoutEmail.setError("Please enter a Valid Email");
            signupInputEmail.setError("valid Input Required");
            requestFocus(signupInputEmail);
            return false;
        }
        signupInputLayoutEmail.setErrorEnabled(false);
        return true;
    }

    private boolean checkPassword() {
        if (signupInputPassword.getText().toString().trim().isEmpty()) {
            signupInputLayoutPasword.setError("Please enter password");
            requestFocus(signupInputPassword);
            return false;
        }
        signupInputLayoutPasword.setErrorEnabled(false);
        return true;
    }

    private boolean checkDOB() {
        try {
            boolean isDateValid = false;
            String[] s = signupInputDOB.getText().toString().split("/");
            int date = Integer.parseInt(s[0]);
            int month = Integer.parseInt(s[1]);

            if (date < 32 && month < 13)
                isDateValid = true;
            if (signupInputDOB.getText().toString().trim().isEmpty() && isDateValid) {
                signupInputLayoutDOB.setError("Enter a valid D.O.B");
                requestFocus(signupInputDOB);
                signupInputDOB.setError("valid input required");
                return false;
            }
        } catch (Exception ex) {
            signupInputLayoutDOB.setError("Enter a valid D.O.B");
            requestFocus(signupInputDOB);
            return false;
        }
        signupInputDOB.setError(null);
        return true;
    }

    private static boolean isValidEmail(String email) {
        return !TextUtils.isEmpty(email) && Patterns.EMAIL_ADDRESS.matcher(email).matches();
    }

    private void requestFocus(View view) {
        if (view.requestFocus()) {
            getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
        }
    }

}

XML文件代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:layout_gravity="center">

        <android.support.design.widget.TextInputLayout
            android:id="@+id/sign_up_name"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true">

           <EditText
               android:id="@+id/signup_input_name"
               android:layout_width="match_parent"
               android:layout_height="wrap_content"
               android:ems="10"
               android:hint="@string/name" />
        </android.support.design.widget.TextInputLayout>
        <android.support.design.widget.TextInputLayout
            android:id="@+id/sign_up_email"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true">

            <EditText
                android:id="@+id/signup_input_email"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:ems="10"
                android:inputType="textEmailAddress"
                android:hint="Email" />
        </android.support.design.widget.TextInputLayout>
        <android.support.design.widget.TextInputLayout
            android:id="@+id/sign_up_Password"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true">

            <EditText
                android:id="@+id/signup_input_Password"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:ems="10"
                android:inputType="textPassword"
                android:hint="Password" />
        </android.support.design.widget.TextInputLayout>
        <android.support.design.widget.TextInputLayout
            android:id="@+id/sign_up_DOB"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true">

            <EditText
                android:id="@+id/signup_input_DOB"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:ems="10"
                android:maxLines="1"
                android:hint="Date of Birth" />
        </android.support.design.widget.TextInputLayout>

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:id="@+id/gender_textView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="I am"
                android:fontFeatureSettings="Password"
                android:textSize="20dp"
                android:fontFamily="Password"/>
            <RadioGroup
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_toRightOf="@+id/gender_textView"
                android:orientation="horizontal">

                <RadioButton
                    android:id="@+id/male_radio"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Male"
                    android:checked="true"/>
                <RadioButton
                    android:id="@+id/Female_radio"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Female"/>
            </RadioGroup>
        </RelativeLayout>

        <Button
            android:id="@+id/btn_signUp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimaryDark"
            android:text="Sign Up"
            android:textColor="@android:color/white" />


    </LinearLayout>

</LinearLayout>

Answer 1

对于初学者来说，你在这里重新分配输入字段，覆盖前一个...我很确定问题是因为这个。

signupInputName = (EditText) findViewById(R.id.signup_input_name);
signupInputName = (EditText) findViewById(R.id.signup_input_email);
signupInputName = (EditText) findViewById(R.id.signup_input_Password);
signupInputName = (EditText) findViewById(R.id.signup_input_DOB);

signupInputLayoutName = (TextInputLayout) findViewById(R.id.sign_up_name);
signupInputLayoutName = (TextInputLayout) findViewById(R.id.sign_up_email);
signupInputLayoutName = (TextInputLayout)  findViewById(R.id.sign_up_DOB);

onCreate() checkEmail()后代码执行的第一件事就是R.id.signup_input_email，而且如上所述，signupInputEmail没有分配checkEmail()。

您的代码将抛出异常，因为if (!checkEmail()) { ... }引用了一个NULL变量。

data have ; input company &:$20. year exit ; cards; company 2 2007 9999 company 2 2008 9999 company 2 2009 2009 company 3 2007 9999 company 3 2008 9999 company 3 2009 9999 company 3 2010 9999 company 4 2007 9999 company 4 2008 2008 ; data want ; merge have have(keep=company exit rename=(exit=final) where=(final ne 9999) ) ; by company ; exit = coalesce(final,exit); run;

单击按钮后Android应用程序崩溃

1 个答案: