安卓activity

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import org.w3c.dom.Text;

public class MainActivity extends Activity {

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

       public void login(View view){
           EditText id = (EditText) findViewById(R.id.edit1);
           String s = id.getText().toString();
           Intent intent=new Intent();
           intent.setClass(MainActivity.this, TestActivity.class);
           intent.putExtra("id",s);
           startActivity(intent);
       }

}