如何使用广播和接收器 [英] How to use broadcast and receivers

问题描述

我如何使用我的广播接收器？当我的应用程序启动我怎么做接收器不断地运行其code样？

How can I use my Broadcast receiver? Like when my app starts how do I make the receiver continually run its code?

我Reciver code：

My Reciver code:

  private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {

        ConnectivityManager mConnectivity;
        mConnectivity = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

        NetworkInfo info = mConnectivity.getActiveNetworkInfo();
        if (info == null || !mConnectivity.getBackgroundDataSetting()) {

            wifi.setChecked(false);

            return;
        } else {
            int netType = info.getType();
            //int netSubtype = info.getSubtype();
            if (netType == ConnectivityManager.TYPE_WIFI) {

                wifi.setChecked(true);

            } else {

                wifi.setChecked(false);

            }
        }

    }
};

WiFi是由路的切换按钮。

Wifi is a toggle button by the way.

请帮助谢谢！

推荐答案

您需要设置您的接收器在manifest.xml文件这样的相关的意图过滤器：

You need to set an intent filter associated with your receiver in your manifest.xml file like this :

<receiver android:name="<fully qualified name of your receiver class>" android:label="@string/label">
<intent-filter>
        <action android:name="package name + your action name" />
    </intent-filter>
</receiver>

那么，在你的活动，当你想打电话给你的接收器，您只需

then, in you activities, when you want to call your receiver, you just

sendBroadcast( new Intent( "package name + your action name" ) );

然后你应该更新您的应用程序，但在UI线程内改变一个部件：

And then you should update your app, but within the ui thread to change a widget :

 final boolean checked = true;
 runOnUIThread( new Runnable() {
    public void run()
    { 
       wifi.setChecked( checked ):
    }
 });

但我猜你接收器是一种活性的研究（只有这样，才能得到一个小部件的引用）中的内部类。因此，而不是通过XML注册接收器，您应该通过code注册。

But I guess you receiver is an inner class inside an acitivity (only way to get a reference on a widget). So, instead of registering your receiver through xml, you should register it through code.

看一看<一个href=\"http://stackoverflow.com/questions/4805269/programmatically-register-a-broadcast-receiver\">this螺纹。

问候，
 斯特凡

Regards, Stéphane

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