Android implements click button login

1. The effect is as follows:

Click the login button to switch pages

 Two, the main implementation code

1. Login page code LoginActivity

public class LoginActivity extends AppCompatActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.activity_login); 

        //Get button 
        Button button = findViewById(R.id.loginBtn); 

        // Button to monitor 
        button.setOnClickListener(new View.OnClickListener() { 
            @Override 
            public void onClick(View v) { 
                //Monitor button, if clicked, jump to 
                Intent intent = new Intent(); 
                //(LoginActivity.this) Is the current page, MainActivity.class is the next page to jump  
                intent.setClass(LoginActivity.this,MainActivity.class);
                startActivity(intent); 
            }
        });
    }
}

2. Main interface code MainActivity

 just join

setContentView(R.layout.activity_main);

activity_main is the current page layout file