java - Android开发者文档IntentService : Are we defining the same class twice?

Question

所以我在 Android 开发人员中遵循这个示例: http://developer.android.com/training/run-background-service/create-service.html使用 IntentService 创建后台服务。请注意，我们在第一个代码示例中定义了类 RSSPullService:

public class RSSPullService extends IntentService {
    @Override
    protected void onHandleIntent(Intent workIntent) {
        // Gets data from the incoming Intent
        String dataString = workIntent.getDataString();
        ...
        // Do work here, based on the contents of dataString
        ...
    }
}

在下一页中，报告工作状态: http://developer.android.com/training/run-background-service/report-status.html我很困惑，我们是否再次定义同一个类来获取状态？

public final class Constants {
    ...
    // Defines a custom Intent action
    public static final String BROADCAST_ACTION =
        "com.example.android.threadsample.BROADCAST";
    ...
    // Defines the key for the status "extra" in an Intent
    public static final String EXTENDED_DATA_STATUS =
        "com.example.android.threadsample.STATUS";
    ...
}
public class RSSPullService extends IntentService {
...
    /*
     * Creates a new Intent containing a Uri object
     * BROADCAST_ACTION is a custom Intent action
     */
    Intent localIntent =
            new Intent(Constants.BROADCAST_ACTION)
            // Puts the status into the Intent
            .putExtra(Constants.EXTENDED_DATA_STATUS, status);
    // Broadcasts the Intent to receivers in this app.
    LocalBroadcastManager.getInstance(this).sendBroadcast(localIntent);
...
}

Answer 1

不要混淆，两个类都是相同的

第一个是展示我们如何创建扩展 IntentService 的服务

然后他们给出了一个向这个IntentService发送数据的例子

最后他们给出了示例来展示同一个 IntentService 如何返回结果。

第二个代码只是他们更改旧 Intent 服务类的内容的另一个示例