android 功课2

package homework1.ni;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.widget.TextView;public class Homework_01Activity extends Activity {    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main2);        Intent intent=getIntent();        String name=intent.getStringExtra("name");        String class1=intent.getStringExtra("class");        String std=intent.getStringExtra("std");        TextView textView=(TextView)findViewById(R.id.textview4);        textView.setText("姓名："+name+"\n班级："+class1+"\n学号："+std);    }}

package homework1.ni;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;public class homework_02 extends Activity {	EditText nameEditText,classEditText,stdEditText;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.main);		nameEditText=(EditText)findViewById(R.id.name);		classEditText=(EditText)findViewById(R.id.class1);		stdEditText=(EditText)findViewById(R.id.std);		Button tijiaoButton=(Button)findViewById(R.id.tijiao);		tijiaoButton.setOnClickListener(new OnClickListener() {						@Override			public void onClick(View v) {				Intent intent=new Intent(homework_02.this,Homework_01Activity.class);				intent.putExtra("name", nameEditText.getText().toString());				intent.putExtra("std", stdEditText.getText().toString());				intent.putExtra("class", classEditText.getText().toString());			    startActivity(intent);			}		});	}	}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" ><LinearLayout android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:orientation="horizontal" ><TextView     android:id="@+id/textview1"    android:layout_width="wrap_content"    android:layout_height="wrap_content" android:text="姓名" android:textSize="20dp"   /><EditText android:id="@+id/name" android:layout_width="fill_parent"    android:layout_height="wrap_content" android:layout_alignTop="@+id/textview1"    android:layout_marginLeft="10dp" android:textSize="20dp"/></LinearLayout><LinearLayout android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:orientation="horizontal" ><TextView     android:id="@+id/textview2"    android:layout_width="wrap_content"    android:layout_height="wrap_content" android:text="学号" android:textSize="20dp"   /><EditText android:id="@+id/std" android:layout_width="fill_parent"    android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:textSize="20dp"/></LinearLayout><LinearLayout android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:orientation="horizontal" ><TextView     android:id="@+id/textview3"    android:layout_width="wrap_content"    android:layout_height="wrap_content" android:text="班级" android:textSize="20dp"  /><EditText android:id="@+id/class1" android:layout_width="fill_parent"    android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:textSize="20dp"/></LinearLayout><Button android:id="@+id/tijiao"    android:layout_width="wrap_content"    android:layout_height="wrap_content" android:text="提交"    android:textSize="20dp"/></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" ><TextView android:id="@+id/textview4"    android:layout_width="fill_parent"    android:layout_height="fill_parent" /></LinearLayout>