黑马Android:Activity在跳转时携带数据

package indi.cc.senddata;

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

//第一个activity
public class MainActivity extends Activity {

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

public void click(View v){
Intent intent = new Intent(this,SecondActivity.class);
String malename = ((EditText)findViewById(R.id.et_malename)).getText().toString();
String femalename = ((EditText)findViewById(R.id.et_femalename)).getText().toString();

//把数据封装至intent对象中
//     intent.putExtra("malename", malename);
//     intent.putExtra("femalename",femalename );

//把数据封装至bundle对象中
Bundle bundle = new Bundle();
bundle.putString("malename", malename);
bundle.putString("femalename", femalename);

//把bundle对象封装至intent对象中
intent.putExtras(bundle);
startActivity(intent);
}
}

package indi.cc.senddata;

import java.util.Random;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
//第二个activity
public class SecondActivity  extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);

Intent intent = getIntent();
//从intent对象中把封装好的数据取出来
//      String maleName = intent.getStringExtra("malename");
//      String feMaleName = intent.getStringExtra("femalename");
Bundle bundle = intent.getExtras();
String maleName = bundle.getString("malename");
String feMaleName = bundle.getString("femalename");
Random rd = new Random();
int yinyuan = rd.nextInt(100);

TextView tv = (TextView) findViewById(R.id.tv);
tv.setText(maleName + "和" + feMaleName + "的姻缘值为" + yinyuan);
}
}

<!--第一个activity布局文件-->
<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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:orientation="vertical"
>

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="这是姻缘计算器，很准的哟" />

<EditText
android:id="@+id/et_malename"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Cairou"
/>
<EditText
android:id="@+id/et_femalename"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Wren"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="计算"
android:onClick="click"
/>
</LinearLayout>

<!--第二个activity布局文件-->
<?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/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="这是第二个Activity" />

</LinearLayout>