Android的广播接收机和意图过滤器 [英] Android-Broadcast Receiver and Intent Filter

问题描述

我是新到Android platform.please帮我广播接收器和意图过滤器的行为在android.please在简单的线条或提前example.thanks解释...

I am new to android platform.please help me out how the Broadcast Receiver and Intent Filter behaves in android.please explain in simple line or with example.thanks in advance...

推荐答案

一个广播接收器是一类在你的Andr​​oid项目负责使用机器人接收所有的意图，这是由其他的活动发.content.ContextWreapper.sendBroadcast（意向意图）

A broadcast receiver is a class in your Android project which is responsible to receive all intents, which are sent by other activities by using android.content.ContextWreapper.sendBroadcast(Intent intent)

在你receicving活动的清单文件，你必须声明这是你的广播接收器类，例如：

In the manifest file of you receicving activity, you have to declare which is your broadcast receiver class, for example:

<receiver android:name="xyz.games.pacman.network.MessageListener">
  <intent-filter>
    <action android:name="xyz.games.pacman.controller.BROADCAST" />
  </intent-filter>
</receiver>

正如你所看到的，你也在这里定义的意图过滤器，那就是，这应该由broadcas接收机接收意向。

As you can see, you also define the intent filter here, that is, which intents should be received by the broadcas receiver.

然后你必须定义延伸了BroadcastReceiver的类。这是您在清单文件中定义的类：

Then you have to define a class which extends BroadcastReceiver. This is the class you defined in the manifest file:

public class MessageListener extends BroadcastReceiver {


    /* (non-Javadoc)
     * @see android.content.BroadcastReceiver#onReceive(android.content.Context, android.content.Intent)
     */
    @Override
    public void onReceive(Context context, Intent intent) {
...
}

下面，这是通过过滤器所有的意图都收到，你可以使用的方法调用传递的参数访问它们。

Here, all intents which are passed through the filter are received and you can access them using the parameter passed in the method call.

这篇关于Android的广播接收机和意图过滤器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！