Java 安卓-我不能参加下一个活动
这是我的日志。我尝试了这么多天,无法解决错误Java 安卓-我不能参加下一个活动,java,android,firebase,database-design,Java,Android,Firebase,Database Design,这是我的日志。我尝试了这么多天,无法解决错误 com.example.project E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.project, PID: 5761 java.lang.IllegalStateException: Could not execute method for android:onClick at androidx.appcompat.app.AppComp
com.example.project E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.project, PID: 5761
java.lang.IllegalStateException: Could not execute method for android:onClick
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:402)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5305)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:397)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5305)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.widget.EditText com.google.android.material.textfield.TextInputLayout.getEditText()' on a null object reference
at com.example.project.SignUp.validateFullName(SignUp.java:110)
at com.example.project.SignUp.call2ndSignUpScreen(SignUp.java:50)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:397)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5305)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
这是我的注册活动。从这次活动中,我想转到第二次注册活动。其代码在注册类代码下面给出
package com.example.project;
import android.app.ActivityOptions;
import android.content.Intent;
import android.os.Bundle;
import android.os.Parcelable;
import android.util.Pair;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
import com.google.android.material.textfield.TextInputLayout;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
public class SignUp extends AppCompatActivity {
ImageView backBtn;
Button next, login;
TextView titleText;
TextInputLayout fullname, username, email, password;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_sign_up);
backBtn = (ImageView) findViewById(R.id.singup_back_btn);
next = (Button) findViewById(R.id.singup_next_btn);
login = (Button) findViewById(R.id.singup_login_btn);
titleText = (TextView) findViewById(R.id.signup_title_text);
fullname = (TextInputLayout) findViewById(R.id.signup_fullname);
username = (TextInputLayout) findViewById(R.id.signup_username);
email = (TextInputLayout) findViewById(R.id.signup_email);
password = (TextInputLayout) findViewById(R.id.signup_password);
}
public void call2ndSignUpScreen(View view) {
if (!validateFullName() | !validateUserName() | !validateEmail() | !validatePassword()) {
return;
}
String fullName =fullname.getEditText().getText().toString();
String userName =username.getEditText().getText().toString();
String Email =email.getEditText().getText().toString();
String Password =password.getEditText().getText().toString();
UserHelperClass helperclass = new UserHelperClass();
FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference myRef = database.getReference("Users");
myRef.setValue(helperclass);
Intent intent = new Intent(getApplicationContext(), SignUp2ndClass.class);
intent.putExtra("fullname", fullName);
intent.putExtra("username", userName);
intent.putExtra("email", Email);
intent.putExtra("password", Password);
Pair[] pairs = new Pair[4];
pairs[0] = new Pair<View, String>(next, "transition_back_btn");
pairs[1] = new Pair<View, String>(next, "transition_title_text");
pairs[2] = new Pair<View, String>(next, "transition_next_btn");
pairs[3] = new Pair<View, String>(next, "transition_login_btn");
ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(SignUp.this, pairs);
startActivity(intent, options.toBundle());
}
public void callstartupscreen(View view) {
Intent intent = new Intent(getApplicationContext(), StartUpScreen.class);
Pair[] pairs = new Pair[1];
pairs[0] = new Pair<View, String>(findViewById(R.id.singup_back_btn), "signup_transition_back_btn");
ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(SignUp.this, pairs);
startActivity(intent, options.toBundle());
}
public void callLoginScreen(View view) {
Intent intent = new Intent(getApplicationContext(), LogIn.class);
Pair[] pairs = new Pair[1];
pairs[0] = new Pair<View, String>(findViewById(R.id.singup_login_btn), "transition_login_btn");
ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(SignUp.this, pairs);
startActivity(intent, options.toBundle());
}
private boolean validateFullName() {
String val = fullname.getEditText().getText().toString().trim();
if (val.isEmpty()) {
fullname.setError("Field can not be Empty");
return false;
} else {
fullname.setError(null);
fullname.setErrorEnabled(false);
return true;
}
}
private boolean validateUserName() {
String val = username.getEditText().getText().toString().trim();
String checkspaces = "\\A\\w{1,20}\\z";
if (val.isEmpty()) {
username.setError("Field can not be Empty");
return false;
} else if (val.length() > 20) {
username.setError("Username is too large");
return false;
} else if (!val.matches(checkspaces)) {
username.setError("No white spaces are allowed!");
return false;
} else {
username.setError(null);
username.setErrorEnabled(false);
return true;
}
}
private boolean validateEmail() {
String val = email.getEditText().getText().toString().trim();
String checkEmail = "[a-zA-Z0-9._-]+@[a-z]+\\.+[a-z]+";
if (val.isEmpty()) {
email.setError("Field can not be Empty");
return false;
} else if (!val.matches(checkEmail)) {
email.setError("Invalid Email!");
return false;
} else {
email.setError(null);
email.setErrorEnabled(false);
return true;
}
}
private boolean validatePassword() {
String val = password.getEditText().getText().toString().trim();
String checkPassword = "^" +
"(?=.*[a-zA-Z])" +
"(?=.*[@#$%^&+=])" +
".{4,}" +
"$";
if (val.isEmpty()) {
password.setError("Field can not be Empty");
return false;
} else if (!val.matches(checkPassword)) {
password.setError("Password is weak Try another one!");
return false;
} else {
password.setError(null);
password.setErrorEnabled(false);
return true;
}
}
}
package com.example.project;
导入android.app.ActivityOptions;
导入android.content.Intent;
导入android.os.Bundle;
导入android.os.Parcelable;
导入android.util.Pair;
导入android.view.view;
导入android.view.WindowManager;
导入android.widget.Button;
导入android.widget.ImageView;
导入android.widget.TextView;
导入androidx.appcompat.app.appcompat活动;
导入com.google.android.material.textfield.TextInputLayout;
导入com.google.firebase.auth.FirebaseAuth;
导入com.google.firebase.auth.FirebaseUser;
导入com.google.firebase.database.DatabaseReference;
导入com.google.firebase.database.FirebaseDatabase;
公共类注册扩展了AppCompatActivity{
图像视图backBtn;
按钮下一步,登录;
文本视图标题文本;
TextInputLayout全名、用户名、电子邮件、密码;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_全屏,WindowManager.LayoutParams.FLAG_全屏);
setContentView(R.layout.activity\u注册);
backBtn=(图像视图)findViewById(R.id.singup\u back\u btn);
next=(按钮)findViewById(R.id.singup\u next\u btn);
login=(按钮)findViewById(R.id.singup\u login\u btn);
titleText=(TextView)findViewById(R.id.signup\u title\u text);
全名=(TextInputLayout)findViewById(R.id.signup\u全名);
用户名=(TextInputLayout)findViewById(R.id.signup\u用户名);
email=(TextInputLayout)findViewById(R.id.signup\u email);
密码=(TextInputLayout)findViewById(R.id.signup\u密码);
}
公共无效呼叫2NDSIGNUP屏幕(视图){
如果(!validateUserName()|!validateUserName()|!validateEmail()|!validatePassword()){
回来
}
字符串fullName=fullName.getEditText().getText().toString();
字符串userName=userName.getEditText().getText().toString();
字符串Email=Email.getEditText().getText().toString();
字符串密码=Password.getEditText().getText().toString();
UserHelperClass helperclass=新的UserHelperClass();
FirebaseDatabase=FirebaseDatabase.getInstance();
DatabaseReference myRef=database.getReference(“用户”);
myRef.setValue(helperclass);
Intent Intent=新的Intent(getApplicationContext(),SignUp2ndClass.class);
intent.putExtra(“全名”,全名);
intent.putExtra(“用户名”,用户名);
意向。额外(“电子邮件”,电子邮件);
intent.putExtra(“密码”,password);
Pair[]pairs=新的Pair[4];
pairs[0]=新对(下一个“transition\u back\u btn”);
pairs[1]=新的一对(下一个是“过渡标题文本”);
pairs[2]=新对(next,“transition_next_btn”);
pairs[3]=新的Pair(下一个“transition\u login\u btn”);
ActivityOptions=ActivityOptions.MakeScenetTransitionAnimation(SignUp.this,成对);
startActivity(intent,options.toBundle());
}
公共无效调用启动屏幕(视图){
Intent Intent=新的Intent(getApplicationContext(),StartUpScreen.class);
Pair[]pairs=新的Pair[1];
pairs[0]=新对(findViewById(R.id.singup\u back\u btn),“signup\u transition\u back\u btn”);
ActivityOptions=ActivityOptions.MakeScenetTransitionAnimation(SignUp.this,成对);
startActivity(intent,options.toBundle());
}
public void callLoginScreen(视图){
Intent Intent=新的Intent(getApplicationContext(),LogIn.class);
Pair[]pairs=新的Pair[1];
pairs[0]=新对(findViewById(R.id.singup\u login\u btn),“transition\u login\u btn”);
ActivityOptions=ActivityOptions.MakeScenetTransitionAnimation(SignUp.this,成对);
startActivity(intent,options.toBundle());
}
私有布尔ValidateFileName(){
String val=fullname.getEditText().getText().toString().trim();
if(val.isEmpty()){
fullname.setError(“字段不能为空”);
返回false;
}否则{
fullname.setError(null);
fullname.setErrorEnabled(false);
返回true;
}
}
私有布尔validateUserName(){
String val=username.getEditText().getText().toString().trim();
字符串checkspaces=“\\A\\w{1,20}\\z”;
if(val.isEmpty()){
username.setError(“字段不能为空”);
返回false;
}否则如果(值长度()>20){
username.setError(“用户名太大”);
返回false;
}如果(!val.matches(checkspaces)){
username.setError(“不允许使用空格!”);
返回false;
}否则{
username.setError(null);
username.setErrorEnabled(false);
返回true;
}
}
私有布尔validateEmail(){
String val=email.getEditText().getText().toString().trim();
字符串checkEmail=“[a-zA-Z0-9.\-]+@[a-z]+\.+[a-z]+”;
if(val.isEmpty()){
email.setError(“字段不能为空”);
返回false;
}如果(!val.matches(checkEmail)){
setError(“无效电子邮件!”);
返回false;
}否则{
email.setError(空);
email.setErrorEnabled(false);
返回true;
}
}
私有布尔validatePassword(){
String val=password.getEditText().getText().toString().trim();
字符串checkPassword=“^”+
“(?=*[a-zA-Z])”+
"(?=.*[@#$%^&+=])" +
".{4,}" +
"$";
if(val.isEmpty()){
帕斯沃
package com.example.project;
import android.app.ActivityOptions;
import android.content.Intent;
import android.os.Bundle;
import android.util.Pair;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
public class SignUp2ndClass extends AppCompatActivity {
ImageView backBtn;
Button next, login;
TextView titleText;
RadioGroup radioGroup;
RadioButton selectGender;
DatePicker datePicker;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_sign_up2nd_class);
backBtn = findViewById(R.id.singup2_back_button);
next = findViewById(R.id.singup2_next_button);
login = findViewById(R.id.singup2_login_btn);
titleText = findViewById(R.id.signup2_title_text);
radioGroup = findViewById(R.id.radio_group);
datePicker = findViewById(R.id.age_picker);
}
public void call3rdSignUpScreen(View view) {
if(!validateGender()){
return;
}
selectGender =findViewById(radioGroup.getCheckedRadioButtonId());
String _gender = selectGender.getText().toString();
int day = datePicker.getDayOfMonth();
int month = datePicker.getMonth();
int year = datePicker.getYear();
String _date = day+"/"+month+"/"+year;
String fullname = getIntent().getStringExtra("fullname");
String username = getIntent().getStringExtra("username");
String email = getIntent().getStringExtra("email");
String password = getIntent().getStringExtra("password");
Intent intent = new Intent(getApplicationContext(), SignUp3rdClass.class);
Pair[] pairs = new Pair[4];
pairs[0] = new Pair<View, String>(next, "transition_back_btn");
pairs[1] = new Pair<View, String>(next, "transition_title_text");
pairs[2] = new Pair<View, String>(next, "transition_next_btn");
pairs[3] = new Pair<View, String>(next, "transition_login_btn");
ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(SignUp2ndClass.this, pairs);
startActivity(intent, options.toBundle());
}
private boolean validateGender(){
if(radioGroup.getCheckedRadioButtonId()==-1){
Toast.makeText(this, "Please Select Gender", Toast.LENGTH_SHORT).show();
return false;
}else{
return true;
}
}
public void callLoginScreen (View view){
Intent intent = new Intent(getApplicationContext(),LogIn.class);
Pair[] pairs = new Pair[1];
pairs[0] = new Pair<View, String>(findViewById(R.id.singup2_login_btn),"transition_login_btn");
ActivityOptions options=ActivityOptions.makeSceneTransitionAnimation(SignUp2ndClass.this,pairs);
startActivity(intent,options.toBundle());
}
}