的时候我会在我注册数据添加到数据库中,但我得到了
火力地堡.getUID NullPointerException异常认证介绍
显示java.lang.NullPointerException:试图调用虚拟方法java.lang.String中com.google.firebase。 auth.FirebaseUser.getUid()”空引用对象上的
我试一下,但是不工作
这里是我的代码
auth = FirebaseAuth.getInstance();
database = FirebaseDatabase.getInstance();
mRef = database.getReference();
FirebaseUser user = auth.getCurrentUser();
userID = user.getUid();
btnSignUp.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final String fname = etFname.getText().toString().trim();
final String lname = etLname.getText().toString().trim();
final String id_card = etIdCard.getText().toString().trim();
final String email = etEmail.getText().toString().trim();
final String mobile = etMobile.getText().toString().trim();
String password = etPassword.getText().toString().trim();
if (TextUtils.isEmpty(email)){
Toast.makeText(getApplicationContext(), "Enter email address!", Toast.LENGTH_SHORT).show();
return;
}
if (TextUtils.isEmpty(password)){
Toast.makeText(getApplicationContext(), "Enter password!", Toast.LENGTH_SHORT).show();
return;
}
if (TextUtils.isEmpty(fname)){
Toast.makeText(getApplicationContext(), "Enter FirstName!", Toast.LENGTH_SHORT).show();
return;
}
if (password.length() < 8) {
Toast.makeText(getApplicationContext(), "Password too short, enter minimum 8 characters!", Toast.LENGTH_SHORT).show();
return;
}
progressBar.setVisibility(View.VISIBLE);
auth.createUserWithEmailAndPassword(email,password)
.addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (!task.isSuccessful()) {
UserInfo userInfo = new UserInfo(fname,lname,id_card,mobile,email);
mRef.child("users").child(userID).setValue(userInfo);
etFname.setText("");
etLname.setText("");
etIdCard.setText("");
etMobile.setText("");
etEmail.setText("");
Toast.makeText(RegisterActivity.this, "Authentication failed." + task.getException(),
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(RegisterActivity.this, "Register Successfully" + task.isSuccessful(), Toast.LENGTH_SHORT).show();
progressBar.setVisibility(View.GONE);
finish();
}
}
});
}
});
}
现在得到像这样的新错误 java.lang.NoSuchMethodError:在类Lcom/google/firebase/FirebaseApp中没有虚方法zzTt()Z;或其超类(“com.google.firebase.FirebaseApp”的声明出现在/data/app/com.example.androiddev.army31-1/split_lib_dependencies_apk.apk:classes36.dex)
现在我可以修复它因为gradle这个不是同一版本
编译,得到了相同的事情
感谢答复遗憾呐如何使用您的代码?我不确定 –
单个班轮和他做了什么之间的区别是什么?没有,这是基本的Java –
请参考文档完整的工作代码Java中[email protected] – Pheonix