Android学习第六天---activity2

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >

<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="用户名" />

<EditText
android:id="@+id/username"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="用户密码" />

<EditText
android:id="@+id/userpasswd"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

<Button
android:id="@+id/login"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/login" />

</LinearLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >

<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="~~~~" />

</RelativeLayout>

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
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 MainActivity extends Activity implements OnClickListener{

EditText editText1,editText2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

editText1=(EditText)findViewById(R.id.username);
editText2=(EditText)findViewById(R.id.userpasswd);
Button button=(Button)findViewById(R.id.login);

button.setOnClickListener(this);
}

@Override
public void onClick(View v) {

String userName = editText1.getText().toString();
String userPasswd = editText2.getText().toString();

Intent intent = new Intent();

Bundle bundle = new Bundle();
bundle.putString("name", userName);
bundle.putString("userpasswd",userPasswd);
intent.putExtra("bundle", bundle);

intent.setClass(MainActivity.this,SecondActivity.class);
startActivity(intent);

}

}

import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class SecondActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.seconda_activity);

TextView textView=(TextView)findViewById(R.id.textView1);
Intent intent=this.getIntent();

Bundle bundle=intent.getBundleExtra("bundle");
String userName=(String)bundle.get("name");
String userPasswd=(String)bundle.get("userpasswd");

textView.setText(userName+"~~~"+userPasswd);

}

}