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<?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=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/textView2"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:background="#00BCD4"
        android:gravity="center"
        android:text="注册信息"
        android:textColor="#FF5722"
        android:textSize="25sp" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="25dp"
        android:gravity="center"
        android:orientation="vertical">

        <TextView
            android:id="@+id/textView3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="你的注册信息是："
            android:textSize="20sp" />

        <TableLayout
            android:layout_width="match_parent"
            android:layout_height="400dp">

            <TableRow
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <TextView
                    android:id="@+id/textView4"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="用户名："
                    android:textSize="20sp" />

                <TextView
                    android:id="@+id/show_name"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />
            </TableRow>

            <TableRow
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <TextView
                    android:id="@+id/textView9"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="密码："
                    android:textSize="20sp" />

                <TextView
                    android:id="@+id/show_pass"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />
            </TableRow>

            <TableRow
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <TextView
                    android:id="@+id/textView11"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="性别："
                    android:textSize="20sp" />

                <TextView
                    android:id="@+id/show_gender"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />
            </TableRow>

            <TableRow
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <TextView
                    android:id="@+id/textView13"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="爱好："
                    android:textSize="20sp" />

                <TextView
                    android:id="@+id/show_hobby"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />
            </TableRow>
        </TableLayout>
    </LinearLayout>
</LinearLayout>

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);
       }

}

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class TestActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test);
        TextView t = (TextView)findViewById(R.id.text);
        Intent intent = this.getIntent();

        String id = intent.getStringExtra("id");
        System.out.println(intent.getStringExtra("id"));
        t.setText(id);
    }
}