利用Bundle实现Android Activity间消息的传递

关于Activity之间的消息的传递。利用Bundle是一种比较方便的办法。

程序的效果是活动A向B跳转的同时发送一字符串，B读出字符串。

先在AndroidManifest.xml中定义一个新的Activity，target：





    Xml代码 
<?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> 





   第一个活动的代码如下：

Java代码 
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");//压入数据  
        intent.putExtras(mBundle);  
        startActivity(intent);  
        finish();  
        return super.onTouchEvent(event);  
    }  
} 

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");//压入数据
intent.putExtras(mBundle);
startActivity(intent);
finish();
return super.onTouchEvent(event);
}
}




   将要跳转到的活动代码：

Java代码 
package com.ray.test;  
 
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");//读出数据  
        setTitle(data);  
    }  
}