How to navigate from one screen to another screen

The most trivial case (called from activity):

startActivity(new Intent(this, ActivityToLaunch.class));

More details here: http://developer.android.com/guide/topics/fundamentals.html

OnClickListener onClickListener = new OnClickListener() {
    @Override
    public void onClick(View v) {
        startActivity(new Intent(action));
    }
};

Button button = (Button) findViewById(id);
button.setOnClickListener(onClickListener);

Button x.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) 
    {
        Intent i = new Intent(y.this, Activity.class);
        startActivity(i);                   
    }
});

Here we've defined a listener for Button x. The OS will call this method and start the Activity referenced in Intent i.

Here's the official tutorial example: http://developer.android.com/guide/tutorials/notepad/notepad-ex2.html

public void onClick(View v) 
{
    Intent myintent = new Intent(currentclass.this, nextactivity.class);
    startActivity(myintent);                               
}

Use following code..I hope this will help you.

Button button = (Button)findViewById(R.id.xxx);
button.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent intent=new Intent(CurrentActivity.this,NextActivity.class);
        startActivity(intent);
    }
});

xxx is id from your xml of your Button.

Intent intentobj=new Intent(FromActivity.this,ToActivity.class);
startActivity(intentobj);

or you can simply use

startActivity(new Intent(FromActivity.this,ToActivity.class)); 

For Kotlin (if you are in an activity)

    buttonToClick.setOnClickListener{     startActivity(this,YourDestinationActivity::class.java)
        }

If you are in a fragment

        buttonToClick.setOnClickListener{
            startActivity(requireActivity, YourDestinationActivity::class.java)
        }

You can navigate to the next screen using these code snippets:

Kotlin

startActivity(Intent(this, LoginActivity::class.java))

Java

startActivity(new Intent(this, LoginActivity.class))

Here's a reference: Android Developers - Starting another activity

In your method fun onCreate(savedInstanceState: Bundle?) add this.

your_btn_id.setOnClickListener{

            val intent = Intent(this, yourpagename::class.java)
            startActivity(intent)
        }

Until now if it doesn't work then, check if these two files are added or not,

import android.content.Intent
import kotlinx.android.synthetic.main.activity_otp.*

Try this code:

 Button my_btn;
 my_btn = findViewById(R.id.submit_btn);
 my_btn.setOnClickListener(new View.OnClickListener() {
     @Override
     public void onClick(View v) {
         setContentView(R.layout.activity_2);
     }
 });

Button navigate;
navigate = findViewById(R.id.button);
navigate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(getApplicationContext(),"Navigate another Activity",Toast.LENGTH_LONG).show();
                Intent intent = new Intent(MainActivity.this,MainActivity2.class);
                startActivity(intent);
            }
        });

Just go to XML file and add Onclick = "opennewactivity" in button xml.

Then go to java code and create class opennewactivity you can just make it my clciking alt+Enter in xml code's "opennewactivity". in that just write

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

and if you want user to not get back to first activity again then just write this

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

 Cartoon_card.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) 
        
        {
            newActivity();
            
        }
    });
    
}
public void newActivity()
{
    Intent selectClass= new Intent(getApplicationContext(), com.example.fyp.videoplayer.class);
    startActivity(selectClass);
    
}