Android利用Bundle实现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);

}
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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");//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;

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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");//读出数据

setTitle(data);

}

}