HarmonyOS NEXT鸿蒙体系相机Camera相干API使用

HarmonyOS下Camera相机相干API使用

预备工作

1. 导入camera接口

1. import {
2.    
3.     camera } from '@kit.CameraKit';
4. import {
5.    
6.     BusinessError } from '@kit.BasicServicesKit';
7. import {
8.    
9.     common } from '@kit.AbilityKit';

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2.获取cameraManager对象

1. getCameraManager(): camera.CameraManager {
2.    
3.    
4.     let cameraManager: camera.CameraManager = camera.getCameraManager(getContext(this));
5.     console.error("01 cameraManager."+cameraManager);
6.     return cameraManager;
7.   }

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3.通过cameraManager类中的getSupportedCameras方法

1. getCameraDevices(cameraManager: camera.CameraManager): Array<camera.CameraDevice> {
2.    
3.    
4.     let cameraArray: Array<camera.CameraDevice> = cameraManager.getSupportedCameras();
5.     this.showContent = ''
6.     if (cameraArray != undefined && cameraArray.length > 0) {
7.    
8.    
9.       this.showContent = '支持的相机设备数量：' + cameraArray.length
10.       for (let index = 0; index < cameraArray.length; index++) {
11.    
12.    
13.         console.info('cameraId : ' + cameraArray[index].cameraId); // 获取相机ID
14.         console.info('cameraPosition : ' + cameraArray[index].cameraPosition); // 获取相机位置
15.         console.info('cameraType : ' + cameraArray[index].cameraType); // 获取相机类型
16.         console.info('connectionType : ' + cameraArray[index].connectionType); // 获取相机连接类型
17.         this.showContent = 'cameraId:' + cameraArray[index].cameraId + '|cameraType:' + cameraArray[index].cameraType + '|connectionType:' + cameraArray[index].connectionType
19.       }
20.       return cameraArray;
21.     } else {
22.    
23.    
24.       console.error("cameraManager.getSupportedCameras error");
25.       this.errorContent = ' cameraManager.getSupportedCameras error'
26.       return [];
27.     }
28.   }

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4.创建相机输入流

1. createInput(cameraDevice: camera.CameraDevice, cameraManager: camera.CameraManager): Promise<camera.CameraInput | undefined> {
2.    
3.    
4.   // 创建相机输入流
5.   let cameraInput: camera.CameraInput | undefined = undefined;
6.   try {
7.    
8.    
9.     cameraInput = cameraManager.createCameraInput(cameraDevice);
10.   } catch (error) {
11.    
12.    
13.     let err = error as BusinessError;
14.     console.error('Failed to createCameraInput errorCode = ' + err.code);
15.   }
16.   if (cameraInput === undefined) {
17.    
18.    
19.     return undefined;
20.   }
21.   // 监听cameraInput错误信息
22.   cameraInput.on('error', cameraDevice, (error: BusinessError) => {
23.    
24.    
25.     console.error(`Camera input error code: ${
26.      
27.      error.code}`);
28.   });
29.   // 打开相机
30.   await cameraInput.open();
31.   return cameraInput;
32. }

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5.获取当前相机装备支持的全部输出流

1. async getSupportedOutputCapability(cameraDevice: camera.CameraDevice, cameraManager: camera.CameraManager): Promise<camera.CameraOutputCapability | undefined> {
2.    
3.    
4.     // 创建相机输入流
5.     let cameraInput: camera.CameraInput | undefined = undefined;
6.     try {
7.    
8.    
9.       cameraInput = cameraManager.createCameraInput(cameraDevice);
10.     } catch (error) {
11.    
12.    
13.       let err = error as BusinessError;
14.       console.error('Failed to createCameraInput errorCode = ' + err.code);
15.     }
16.     if (cameraInput === undefined) {
17.    
18.    
19.       return undefined;
20.     }
21.     // 监听cameraInput错误信息
22.     cameraInput

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