尝试对空对象引用调用虚拟方法“android.text.editable android.widget.edittext.gettext（）”。我试过所有可能的案子，但没有解决，需要建议。有人能帮我解决这个问题吗？我对insert方法使用restapi。xml文件上的文本数相同。

public class LoginActivity extends AppCompatActivity {
    EditText edt_first,
           edt_mid,
           edt_fam,
           edt_egn,
           edt_phone,
           edt_adress,
           edt_username,
           edt_password,
           edt_blood,
           edt_gender,
           edt_level;
    Button btn_regs;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);    
        edt_username = (EditText) findViewById(R.id.edit_username);
        edt_password = (EditText) findViewById(R.id.edit_password);
        edt_adress = (EditText) findViewById(R.id.edit_adress);
        edt_egn = (EditText) findViewById(R.id.edit_egn);
        edt_fam = (EditText) findViewById(R.id.edit_family);
        edt_first = (EditText) findViewById(R.id.edit_first);
        edt_phone = (EditText) findViewById(R.id.edit_phone);
        edt_mid = (EditText) findViewById(R.id.edit_mid);
        edt_blood = (EditText) findViewById(R.id.edit_adress2);
        edt_gender = (EditText) findViewById(R.id.edit_adress3);
        edt_level = (EditText) findViewById(R.id.edit_first2);
        btn_regs = (Button)findViewById(R.id.btn_register);
        btn_regs.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                registerUser();
            }
        });

    }

    private void registerUser() {
try {

    Account account = new Account();
    account.setP_address(edt_adress.getText().toString());
    account.setP_blood_group(edt_blood.getText().toString());
    account.setP_first_name(edt_first.getText().toString());
    account.setP_mid_name(edt_mid.getText().toString());
    account.setP_family_name(edt_fam.getText().toString());
    account.setP_gender(edt_gender.getText().toString());
    account.setP_phone(edt_phone.getText().toString());
    account.setP_egn(edt_egn.getText().toString());
    account.setU_password(edt_password.getText().toString());
    account.setU_username(edt_username.getText().toString());
    account.setU_user_level(edt_level.getText().toString());
INodeJS accountservice = RetrofitClient.getInstance().create(INodeJS.class);
Call call = accountservice.create(account);
call.enqueue(new Callback() {
    @Override
    public void onResponse(Call call, Response response) {
        Boolean result = (Boolean) response.body();
        if(result){
            Intent intent = new Intent(LoginActivity.this, MainActivity.class);
            startActivity(intent);
        } else {
            Toast.makeText(getApplicationContext(), getString(R.string.app_name), Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    public void onFailure(Call call, Throwable t) {
        Toast.makeText(getApplicationContext(), getString(R.string.app_name), Toast.LENGTH_SHORT).show();
    }
});

}
catch (Exception e)
{
    Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
}
    }
}

xml格式

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".LoginActivity">

    <EditText
        android:id="@+id/edit_first"
        android:layout_width="141dp"
        android:layout_height="59dp"
        android:layout_marginStart="135dp"
        android:layout_marginTop="36dp"
        android:layout_marginEnd="135dp"
        android:ems="10"
        android:hint="Име"
        android:inputType="textEmailAddress"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/edit_first2"
        android:layout_width="141dp"
        android:layout_height="59dp"
        android:layout_marginStart="5dp"
        android:layout_marginTop="52dp"
        android:ems="10"
        android:hint="Име"
        android:inputType="textEmailAddress"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/edit_first"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/edit_phone"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="102dp"
        android:layout_marginTop="18dp"
        android:layout_marginEnd="100dp"
        android:ems="10"
        android:hint="Телефонен номер"
        android:inputType="textEmailAddress"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/edit_family" />

    <Button
        android:id="@+id/btn_register"
        android:layout_width="432dp"
        android:layout_height="56dp"
        android:layout_marginTop="20dp"
        android:text="Регистрация"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.523"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/edit_passwords" />

    <EditText
        android:id="@+id/edit_mid"
        android:layout_width="211dp"
        android:layout_height="49dp"
        android:layout_marginStart="100dp"
        android:layout_marginTop="16dp"
        android:layout_marginEnd="100dp"
        android:ems="10"
        android:hint="Презиме"
        android:inputType="textEmailAddress"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/edit_first" />

    <EditText
        android:id="@+id/edit_adress"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="6dp"
        android:ems="10"
        android:hint="Адрес"
        android:inputType="textEmailAddress"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/edit_egn" />

    <EditText
        android:id="@+id/edit_adress2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="72dp"
        android:ems="10"
        android:hint="Адрес"
        android:inputType="textEmailAddress"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.495"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/edit_egn" />

    <EditText
        android:id="@+id/edit_adress3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="140dp"
        android:ems="10"
        android:hint="Адрес"
        android:inputType="textEmailAddress"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.495"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/edit_egn" />

    <EditText
        android:id="@+id/edit_passwords"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="103dp"
        android:layout_marginTop="13dp"
        android:layout_marginEnd="99dp"
        android:ems="10"
        android:hint="Парола"
        android:inputType="textEmailAddress"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/edit_usernames" />

    <EditText
        android:id="@+id/edit_family"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="101dp"
        android:layout_marginTop="20dp"
        android:layout_marginEnd="101dp"
        android:ems="10"
        android:hint="Фамилия"
        android:inputType="textEmailAddress"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/edit_mid" />

    <EditText
        android:id="@+id/edit_usernames"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="103dp"
        android:layout_marginTop="25dp"
        android:layout_marginEnd="99dp"
        android:ems="10"
        android:hint="Потребителско име"
        android:inputType="textEmailAddress"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/edit_adress3" />

    <EditText
        android:id="@+id/edit_egn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="103dp"
        android:layout_marginTop="20dp"
        android:layout_marginEnd="99dp"
        android:ems="10"
        android:hint="ЕГН"
        android:inputType="textEmailAddress"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/edit_phone" />

</androidx.constraintlayout.widget.ConstraintLayout>