新增畫面

1.加入 activity 到 manifest.xml

<activity
  android:name="com.example.myapplication.Login"
  android:label="@string/app_name">
</activity>

2.加入對應 class

package com.example.myapplication;

import android.os.Bundle;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

public class Login extends AppCompatActivity {
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);
    }
}

3.跳轉畫面

Intent intent = new Intent(this, YourActivity.class);
startActivity(intent);