HarmonyOS Application Development - Recording, Saving, and Playing Audio
Your code example demonstrates how to implement audio recording and playback functions in HarmonyOS. Below is a summary of the code and some improvement suggestions: ### Summary 1. **Permission Application**: - User authorization is required before starting audio recording. - The `requestPermissionsFromUser` method is used to obtain the user's permission. 2. **Recording Function**: - Use `startRecord` to begin audio recording and save the file to the specified path.
Read MoreHarmonyOS Application Development - Recording Audio and Implementing Real - time Speech Recognition with WebSocket
Your code implements a complete example of real-time speech recognition using WebSocket. The following are some supplementary and optimization suggestions for the entire project to ensure robustness and maintainability. ### 1. Permission Check and Prompt When requesting permissions, more detailed prompt information can be provided, and reasonable operational suggestions can be given after the user refuses authorization, or guide the user to go to the settings page for manual authorization. ```javascript reqPermissionsAndRecord(permissions: Ar ```
Read MoreHarmonyOS App Development - Customizable Deletable List Popup
This application implements a custom list popup window function, supporting task addition, deletion, and confirmation. The specific implementation is as follows: 1. **Entity Class**: The `Intention` class is used to define task items. 2. **Data Source Class** (`IntentionDataSource`): Manages data operations for the task list, including CRUD operations and notifying listeners of updates. 3. **Custom Popup Component** (`AddIntentionDialog`): Displays the current task list and provides delete and confirm buttons. (Note: The original text cuts off here, the translation assumes standard functionality continuation)
Read MoreHarmonyOS Application Development - Imitating WeChat Chat Message List
This example demonstrates how to create a chat application interface similar to WeChat using ArkTS. The page structure includes a scrollable message list and a button to dynamically add new messages. The core code is as follows: 1. The `Msg` class defines the message type (sent or received). 2. The `MsgDataSource` class implements the data source interface, manages the message list, and provides add/delete operations. 3. The page uses the `List` component to display the message list, with `LazyForEach` to dynamically load new messages as the user scrolls.
Read MoreHarmonyOS Application Development - Sending POST Request and Obtaining Result
This code is used to send data to the server via a POST request and parse the JSON response. The core functionalities include: 1. Using the `http.createHttp().request()` method to send asynchronous POST requests. 2. Setting request headers and the data to be sent. 3. Obtaining the response result and parsing it into JSON format. 4. Parsing the JSON data and extracting valid information to update the interface text. The code structure clearly demonstrates how to implement HTTP requests in a HarmonyOS application by setting state variables.
Read MoreHarmonyOS Application Development - Playing Local Audio Files
This document introduces the implementation of audio playback functionality on HarmonyOS using the AVPlayer audio and video player. The main steps include: 1. Creating an `AVPlayer` instance and registering callback functions to handle state changes and errors; 2. Obtaining the local audio file path, opening the audio file through file system operations to get the file descriptor, and setting it to `AVPlayer` to trigger resource initialization; 3. Implementing state machine transition logic, from resource initialization to playback completion. This code snippet demonstrates how to implement audio playback using the ArkTS language under the Stage model.
Read MoreHarmonyOS Application Development - Requesting Voice Synthesis Service to Obtain Audio File
This document describes a text-to-speech service implemented using HarmonyOS, which uploads text data and requests the server to return audio data. Key steps include creating HTTP requests, setting request headers and data bodies, processing response data, and saving it to a local file. The code example demonstrates how to integrate this functionality in an Ability, specifically implementing the download and saving of a .wav format voice file after the user inputs text. It should be noted that the service response type must be `application/octet-stream` to correctly obtain the audio stream, and this service is only applicable to... (The original text appears to be cut off here.)
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