Android利用Bundle實現Activity間訊息的傳遞

關於Activity之間的訊息的傳遞。利用Bundle是一種比較方便的辦法。

程式的效果是活動A向B跳轉的同時發送一字串，B讀出字串。

先在AndroidManifest.xml中定義一個新的Activity，target：

    Xml代碼 

<?xml version="1.0" encoding="utf-8"?> 

<manifest xmlns:android="http://schemas.android.com/apk/res/android" 

      package="com.ray.test" 

      android:versionCode="1" 

      android:versionName="1.0"> 

    <application android:icon="@drawable/icon" android:label="@string/app_name"> 

        <activity android:name=".TestBundle" 

                  android:label="@string/app_name"> 

            <intent-filter> 

                <action android:name="android.intent.action.MAIN" /> 

                <category android:name="android.intent.category.LAUNCHER" /> 

            </intent-filter> 

        </activity> 

          

        <activity android:name=".Target"></activity> 

    </application> 

    <uses-sdk android:minSdkVersion="3" /> 

</manifest>  

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

      package="com.ray.test"

      android:versionCode="1"

      android:versionName="1.0">

    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <activity android:name=".TestBundle"

                  android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

       

        <activity android:name=".Target"></activity>

    </application>

    <uses-sdk android:minSdkVersion="3" />

</manifest> 

第一個活動的代碼如下：

Java代碼 

package com.ray.test;  

 

import android.app.Activity;  

import android.content.Intent;  

import android.os.Bundle;  

import android.view.MotionEvent;  

 

public class TestBundle extends Activity {  

    public void onCreate(Bundle savedInstanceState) {  

        super.onCreate(savedInstanceState);  

        setContentView(R.layout.main);  

    }  

      

    public boolean onTouchEvent(MotionEvent event) {  

        Intent intent = new Intent();  

        intent.setClass(TestBundle.this, Target.class);  

        Bundle mBundle = new Bundle();  

        mBundle.putString("Data", "ray'blog");//壓入資料  

        intent.putExtras(mBundle);  

        startActivity(intent);  

        finish();  

        return super.onTouchEvent(event);  

    }  
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} 

package com.ray.test;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.MotionEvent;

public class TestBundle extends Activity {

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

    }

   

public boolean onTouchEvent(MotionEvent event) {

Intent intent = new Intent();

intent.setClass(TestBundle.this, Target.class);

Bundle mBundle = new Bundle();

mBundle.putString("Data", "ray'blog");//壓入資料

intent.putExtras(mBundle);

startActivity(intent);

finish();

return super.onTouchEvent(event);

}

}

將要跳轉到的活動代碼：

Java代碼 

package com.ray.test;  

 
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import android.app.Activity;  

import android.os.Bundle;  

 

public class Target extends Activity{  

      

    public void onCreate(Bundle savedInstanceState) {  

        super.onCreate(savedInstanceState);  

        setContentView(R.layout.main);  

        Bundle bundle = getIntent().getExtras();    

        String data=bundle.getString("Data");//讀出資料  

        setTitle(data);  

    }  

}