broadcast receiver

简明释义

广播收音机

英英释义

例句

1.The broadcast receiver in our Android app listens for incoming SMS messages.

我们安卓应用中的广播接收器监听传入的短信。

2.When the device is charging, the broadcast receiver triggers a notification.

当设备正在充电时，广播接收器会触发通知。

3.The broadcast receiver can be registered in the manifest or dynamically at runtime.

可以在清单文件中或在运行时动态注册广播接收器。

4.A broadcast receiver can help your app respond to system-wide broadcasts.

广播接收器可以帮助您的应用响应系统范围内的广播。

5.To update the UI when the network status changes, we implemented a broadcast receiver.

为了在网络状态变化时更新用户界面，我们实现了一个广播接收器。

作文

In the world of mobile application development, understanding the various components that interact with the operating system is crucial for creating efficient and responsive applications. One such component is the broadcast receiver, which plays an essential role in managing communication between different parts of an application and the Android system itself. A broadcast receiver is a component that allows an application to listen for and respond to broadcast messages from other applications or the system. These messages can indicate a wide range of events, such as changes in network connectivity, battery status, or even when a new SMS message arrives. By registering a broadcast receiver, developers can ensure that their applications can react to these events in real-time, enhancing user experience and functionality.For instance, consider an application that offers weather alerts. Utilizing a broadcast receiver, the application can listen for updates from a weather service. When the weather service broadcasts a message indicating severe weather conditions, the broadcast receiver can trigger a notification to the user, ensuring they are informed promptly. This ability to respond to system-wide events makes broadcast receivers invaluable in modern app development.Moreover, implementing a broadcast receiver is straightforward. Developers can define a broadcast receiver in the app's manifest file or register it dynamically within the code. The manifest approach is useful for static receivers that need to respond to system-wide broadcasts even when the application is not running. In contrast, dynamic registration is beneficial for receivers that only need to operate while the application is active, thus conserving system resources.However, developers must also consider the implications of using broadcast receivers. Since these components can wake up an application even when it is not in the foreground, they can lead to increased battery consumption if not managed properly. Therefore, it is essential to unregister the broadcast receiver when it is no longer needed, particularly in the case of dynamically registered receivers. This practice helps maintain optimal performance and minimizes unnecessary resource usage.In summary, the broadcast receiver is a powerful tool in the Android developer's toolkit, enabling applications to respond to important system events and inter-application communications. By leveraging this component effectively, developers can create applications that are not only functional but also responsive to the user's needs. Whether it's sending timely notifications, updating user interfaces, or managing application states, the broadcast receiver significantly enhances the overall user experience. As mobile technology continues to evolve, mastering the use of broadcast receivers will remain a critical skill for developers aiming to build innovative and efficient applications.

在移动应用开发的世界中，理解与操作系统交互的各种组件对于创建高效和响应迅速的应用程序至关重要。其中一个关键组件是广播接收器，它在管理应用程序不同部分与Android系统之间的通信中发挥着重要作用。广播接收器是一个组件，允许应用程序监听并响应来自其他应用程序或系统的广播消息。这些消息可以指示广泛的事件，例如网络连接的变化、电池状态，甚至是新的短信到达。当注册了广播接收器时，开发人员可以确保他们的应用程序能够实时响应这些事件，从而增强用户体验和功能。例如，考虑一个提供天气警报的应用程序。利用广播接收器，该应用程序可以监听来自天气服务的更新。当天气服务广播一条消息，指示出现严重天气条件时，广播接收器可以触发通知给用户，确保他们及时获得信息。这种响应系统范围内事件的能力使得广播接收器在现代应用开发中不可或缺。此外，实现广播接收器也很简单。开发人员可以在应用程序的清单文件中定义一个广播接收器，或者在代码中动态注册它。清单方法适用于需要在应用程序未运行时响应系统范围广播的静态接收器。而动态注册则适用于只需在应用程序活动时操作的接收器，从而节省系统资源。然而，开发人员还必须考虑使用广播接收器的影响。由于这些组件可以唤醒应用程序，即使它不在前台，它们如果管理不当可能会导致电池消耗增加。因此，在不再需要时注销广播接收器至关重要，特别是在动态注册的接收器的情况下。这种做法有助于保持最佳性能，并最小化不必要的资源使用。总之，广播接收器是Android开发者工具包中的强大工具，使应用程序能够响应重要的系统事件和应用程序间通信。通过有效利用这一组件，开发人员可以创建不仅功能齐全而且能响应用户需求的应用程序。无论是发送及时的通知、更新用户界面，还是管理应用程序状态，广播接收器都显著提升了整体用户体验。随着移动技术的不断发展，掌握使用广播接收器将仍然是开发人员构建创新和高效应用程序的重要技能。