package com.chaoyang.activity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.style.BulletSpan;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button button =(Button)findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {

   //給按鈕注冊(cè)點(diǎn)擊事件，打開(kāi)新的Acticity
         @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
          //為Intent設(shè)置要激活的組件（將要激活TheOtherActivity這個(gè)Activity）
    Intent intent =new Intent(MainActivity.this,TheOtherActivity.class);//
    //寫(xiě)法一 intent.setClass(MainActivity.this, OtherActivity.class);//設(shè)置要激活的組件
    //寫(xiě)法二 intent.setComponent(new ComponentName(MainActivity.this, TheOtherActivity.class));//設(shè)置要激活的組件

    //第一種傳值方式(代碼看起來(lái)更加更簡(jiǎn)潔)
    /*
    intent.putExtra("name", "dinglang");
      intent.putExtra("age", 22);
      */
    //第二種傳值方式
    Bundle bundle =new Bundle();
    bundle.putString("name", "dinglang");
    bundle.putInt("age", 22);
    intent.putExtras(bundle);
    /*
     Intent提供了各種常用類型重載后的putExtra()方法，如： putExtra(String name, String value)、 putExtra(String name, long value)，在putExtra()方法內(nèi)部會(huì)判斷當(dāng)前Intent對(duì)象內(nèi)部是否已經(jīng)存在一個(gè)Bundle對(duì)象，如果不存在就會(huì)新建Bundle對(duì)象，以后調(diào)用putExtra()方法傳入的值都會(huì)存放于該Bundle對(duì)象
                                            這些其實(shí)可以通過(guò)看源碼的，內(nèi)部實(shí)現(xiàn)的原理都是一樣的
     */
    //startActivity(intent);//不需要接收組件的返回值，就可以直接這樣激活了
    //需要接收返回結(jié)果。注意返回的結(jié)果碼
    startActivityForResult(intent, 100);
         }
  });
    }

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  // TODO Auto-generated method stub

  Toast.makeText(this, data.getStringExtra("result"), 1).show();//得到返回結(jié)果
  super.onActivityResult(requestCode, resultCode, data);
 }
}

package com.chaoyang.activity;

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

public class TheOtherActivity extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);
  setContentView(R.layout.other);//設(shè)置該Activity所對(duì)應(yīng)的xml布局文件
  Intent intent =this.getIntent();//得到激活她的意圖
  String name =intent.getStringExtra("name");
  int age=intent.getExtras().getInt("age");//第二種取值方式
  TextView textView = (TextView)this.findViewById(R.id.result);
  textView.setText("姓名："+ name+"  年齡："+ age);
  Button button = (Button)this.findViewById(R.id.close);
  button.setOnClickListener(new View.OnClickListener() {

   //返回結(jié)果給前面的Activity
   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    Intent intent =new Intent();
    intent.putExtra("result", "這是處理結(jié)果");
    setResult(20, intent);//設(shè)置返回?cái)?shù)據(jù)
    finish();//關(guān)閉activity
   }
  });
 }

}

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

    <Button 
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:text="打開(kāi)OtherActivity"
     android:id="@+id/button"
     />
</LinearLayout>

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

  <TextView 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="這是OtherActivity"
    android:id="@+id/result"
    />

      <Button 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="關(guān)閉Activity"
    android:id="@+id/close"
    />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.chaoyang.activity"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".MainActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <!-- 注意項(xiàng)目清單文件中要加上 -->
<activity android:name="TheOtherActivity" android:label="the other Activity"/>
    </application>
</manifest>