【转】利用Bundle实现Android Activity间消息的传递

地址：http://www.iteye.com/topic/424491

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

1. <?xml version="1.0" encoding="utf-8"?>
2. <manifest xmlns:android="http://schemas.android.com/apk/res/android"
3. package="com.ray.test"
4. android:versionCode="1"
5. android:versionName="1.0">
6. <application android:icon="@drawable/icon" android:label="@string/app_name">
7. <activity android:name=".TestBundle"
8. android:label="@string/app_name">
9. <intent-filter>
10. <action android:name="android.intent.action.MAIN" />
11. <category android:name="android.intent.category.LAUNCHER" />
12. </intent-filter>
13. </activity>
15. <activity android:name=".Target"></activity>
16. </application>
17. <uses-sdk android:minSdkVersion="3" />
18. </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

1. package com.ray.test;
3. import android.app.Activity;
4. import android.content.Intent;
5. import android.os.Bundle;
6. import android.view.MotionEvent;
8. public class TestBundle extends Activity {
9. public void onCreate(Bundle savedInstanceState) {
10. super.onCreate(savedInstanceState);
11. setContentView(R.layout.main);
12. }
14. public boolean onTouchEvent(MotionEvent event) {
15. Intent intent = new Intent();
16. intent.setClass(TestBundle.this, Target.class);
17. Bundle mBundle = new Bundle();
18. mBundle.putString("Data", "ray'blog");//压入数据
19. intent.putExtras(mBundle);
20. startActivity(intent);
21. finish();
22. return super.onTouchEvent(event);
23. }
24. }

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

1. package com.ray.test;
3. import android.app.Activity;
4. import android.os.Bundle;
6. public class Target extends Activity{
8. public void onCreate(Bundle savedInstanceState) {
9. super.onCreate(savedInstanceState);
10. setContentView(R.layout.main);
11. Bundle bundle = getIntent().getExtras();
12. String data=bundle.getString("Data");//读出数据
13. setTitle(data);
14. }
15. }

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);
    }
}