本模块提供自定义界面扫码能力。
起始版本:4.1.0(11)
相机控制参数。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:4.1.0(11)
名称 | 类型 | 只读 | 可选 | 说明 |
|---|---|---|---|---|
width | number | 否 | 否 | XComponent组件的宽,默认使用单位为vp,支持px、lpx和vp。 |
height | number | 否 | 否 | XComponent组件的高,默认使用单位为vp,支持px、lpx和vp。 |
surfaceId | string | 否 | 否 | XComponent持有surface的ID。 |
示例:
import { hilog } from '@kit.PerformanceAnalysisKit';
import { BusinessError } from '@kit.BasicServicesKit';
import { scanBarcode, customScan } from '@kit.ScanKit';
@Entry
@Component
struct customScanPage {
// 设置预览流高度,默认单位:vp
@State cameraHeight: number = 640;
// 设置预览流宽度,默认单位:vp
@State cameraWidth: number = 360;
private mXComponentController: XComponentController = new XComponentController();
build() {
Stack() {
XComponent({
id: 'componentId',
type: XComponentType.SURFACE,
controller: this.mXComponentController
})
.onLoad(() => {
hilog.info(0x0001, '[Scan Sample]', 'onLoad is called')
// 获取XComponent的surfaceId
let surfaceId: string = this.mXComponentController.getXComponentSurfaceId();
hilog.info(0x0001, 'viewControl', `onLoad surfaceId: ${surfaceId}`);
// 设置ViewControl相应字段
let viewControl: customScan.ViewControl = {
width: this.cameraWidth,
height: this.cameraHeight,
surfaceId: surfaceId
};
try {
customScan.start(viewControl).then((scanResult: Array<scanBarcode.ScanResult>) => {
hilog.info(0x0001, '[Scan Sample]',
`Succeeded in getting ScanResult by promise, scanResult is ${JSON.stringify(scanResult)}`);
}).catch((error: BusinessError) => {
hilog.error(0x0001, '[Scan Sample]',
`Failed to get ScanResult by promise. Code: ${error.code}, message: ${error.message}`);
})
} catch (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to start customScan. Code: ${error.code}, message: ${error.message}`);
}
})
.height(this.cameraHeight)
.width(this.cameraWidth)
.position({ x: 0, y: 0 })
}
.alignContent(Alignment.Bottom)
.height('100%')
.width('100%')
.position({ x: 0, y: 0 })
}
} 相机预览流(YUV)。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:5.0.0(12)
名称 | 类型 | 只读 | 可选 | 说明 |
|---|---|---|---|---|
byteBuffer | ArrayBuffer | 否 | 否 | 相机预览流的ArrayBuffer数组。 |
width | number | 否 | 否 | 相机预览流的宽度,单位:px。 |
height | number | 否 | 否 | 相机预览流的高度,单位:px。 |
scanCodeRects | Array<scanBarcode.ScanCodeRect> | 否 | 是 | 相机预览流的码图检测位置信息。 |
示例:
import { hilog } from '@kit.PerformanceAnalysisKit';
import { AsyncCallback, BusinessError } from '@kit.BasicServicesKit';
import { scanBarcode, customScan } from '@kit.ScanKit';
@Entry
@Component
struct customScanPage {
// 设置预览流高度,默认单位:vp
@State cameraHeight: number = 640;
// 设置预览流宽度,默认单位:vp
@State cameraWidth: number = 360;
private mXComponentController: XComponentController = new XComponentController();
private callback: AsyncCallback<scanBarcode.ScanResult[]> =
async (error: BusinessError, result: scanBarcode.ScanResult[]) => {
if (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to get ScanResult by callback. Code: ${error.code}, message: ${error.message}`);
return;
}
hilog.info(0x0001, '[Scan Sample]',
`Succeeded in getting ScanResult by callback, result is ${JSON.stringify(result)}`);
}
// 回调获取ScanFrame
private frameCallback: AsyncCallback<customScan.ScanFrame> =
async (error: BusinessError, frameResult: customScan.ScanFrame) => {
if (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to get ScanFrame by callback. Code: ${error.code}, message: ${error.message}`);
return;
}
// byteBuffer相机YUV图像数组
hilog.info(0x0001, '[Scan Sample]',
`Succeeded in getting ScanFrame.byteBuffer.byteLength: ${frameResult.byteBuffer.byteLength}`);
hilog.info(0x0001, '[Scan Sample]',
`Succeeded in getting ScanFrame.scanCodeRect: ${JSON.stringify(frameResult.scanCodeRects)}`);
}
build() {
Stack() {
XComponent({
id: 'componentId',
type: XComponentType.SURFACE,
controller: this.mXComponentController
})
.onLoad(() => {
hilog.info(0x0001, '[Scan Sample]', 'Succeeded in loading, onLoad is called');
// 获取XComponent的surfaceId
let surfaceId: string = this.mXComponentController.getXComponentSurfaceId();
hilog.info(0x0001, '[Scan Sample]', `Succeeded ing getting surfaceId: ${surfaceId}`);
// 设置ViewControl相应字段
let viewControl: customScan.ViewControl = {
width: this.cameraWidth,
height: this.cameraHeight,
surfaceId: surfaceId
};
try {
customScan.start(viewControl, this.callback, this.frameCallback);
} catch (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to start customScan. Code: ${error.code}, message: ${error.message}`);
}
})
.height(this.cameraHeight)
.width(this.cameraWidth)
.position({ x: 0, y: 0 })
}
.alignContent(Alignment.Bottom)
.height('100%')
.width('100%')
.position({ x: 0, y: 0 })
}
}
// start接口frameCallback回调返回frameResult数据
import { customScan, scanBarcode } from '@kit.ScanKit';
// 模拟相机预览流返回数据frameResult: customScan.ScanFrame
let frameResult: customScan.ScanFrame = {
"width": 1920,
"height": 1080,
// buffer 为相机流
"byteBuffer": buffer,
"scanCodeRects": [{
"left": 84,
"top": 142,
"right": 1695,
"bottom": 996
}]
};
if (frameResult && frameResult.scanCodeRects) {
let rect: scanBarcode.ScanCodeRect = frameResult.scanCodeRects[0];
// 预览流尺寸转换为显示组件Xcomponent尺寸比例,例如设置的scanWidth为360vp
let scanWidth = 360;
let ratio = scanWidth / frameResult.height;
let left = (frameResult.height - rect.bottom) * ratio;
let top = rect.left * ratio;
let right = (frameResult.height - rect.top) * ratio;
let bottom = rect.right * ratio;
} init(options?: scanBarcode.ScanOptions): void
初始化自定义界面扫码。
需要权限:ohos.permission.CAMERA
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:4.1.0(11)
参数名 | 类型 | 必填 | 说明 |
|---|---|---|---|
options | scanBarcode.ScanOptions | 否 | 自定义界面扫码参数。 |
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
401 | Parameter error. Possible causes: 1. Incorrect parameter types; 2. Parameter verification failed. |
1000500001 | Internal error. |
import { scanBarcode, scanCore, customScan } from '@kit.ScanKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
let options: scanBarcode.ScanOptions = {
scanTypes: [scanCore.ScanType.ALL],
enableMultiMode: true,
enableAlbum: true
};
try {
customScan.init(options);
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to init customScan. Code: ${error.code}, message: ${error.message}`);
} start(viewControl: ViewControl): Promise<Array<scanBarcode.ScanResult>>
启动扫码相机流,使用Promise异步回调获取扫码结果。
此接口需要在init接口调用后才能使用。
需要权限:ohos.permission.CAMERA
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:4.1.0(11)
参数名 | 类型 | 必填 | 说明 |
|---|---|---|---|
viewControl | 是 | 相机控制参数。 |
类型 | 说明 |
|---|---|
Promise<Array<scanBarcode.ScanResult>> | Promise对象,返回启动相机流扫码结果对象。 |
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
401 | Parameter error. Possible causes: 1. Incorrect parameter types; 2. Parameter verification failed. |
1000500001 | Internal error. |
示例:
import { hilog } from '@kit.PerformanceAnalysisKit';
import { BusinessError } from '@kit.BasicServicesKit';
import { scanBarcode, customScan } from '@kit.ScanKit';
@Entry
@Component
struct customScanPage {
// 设置预览流高度,默认单位:vp
@State cameraHeight: number = 640
// 设置预览流宽度,默认单位:vp
@State cameraWidth: number = 360
private mXComponentController: XComponentController = new XComponentController();
build() {
Stack() {
XComponent({
id: 'componentId',
type: XComponentType.SURFACE,
controller: this.mXComponentController
})
.onLoad(() => {
hilog.info(0x0001, '[Scan Sample]', 'Succeeded in loading, onLoad is called');
// 获取XComponent的surfaceId
let surfaceId: string = this.mXComponentController.getXComponentSurfaceId();
hilog.info(0x0001, '[Scan Sample]', `Succeeded in getting surfaceId: ${surfaceId}`);
// 设置ViewControl相应字段
let viewControl: customScan.ViewControl = {
width: this.cameraWidth,
height: this.cameraHeight,
surfaceId: surfaceId
};
try {
customScan.start(viewControl).then((scanResult: Array<scanBarcode.ScanResult>) => {
hilog.info(0x0001, '[Scan Sample]',
`Succeeded in getting ScanResult by promise, scanResult is ${JSON.stringify(scanResult)}`);
}).catch((error: BusinessError) => {
hilog.error(0x0001, '[Scan Sample]',
`Failed to get ScanResult by promise. Code: ${error.code}, message: ${error.message}`);
});
} catch (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to start customScan. Code: ${error.code}, message: ${error.message}`);
}
})
.height(this.cameraHeight)
.width(this.cameraWidth)
.position({ x: 0, y: 0 })
}
.alignContent(Alignment.Bottom)
.height('100%')
.width('100%')
.position({ x: 0, y: 0 })
}
} start(viewControl: ViewControl, callback: AsyncCallback<Array<scanBarcode.ScanResult>>, frameCallback? :AsyncCallback<ScanFrame>): void
启动扫码相机流,使用Callback异步回调获取扫码结果、相机预览流(YUV-图像格式NV21基于4:2:0采样)。
此接口需要在init接口调用后才能使用。
需要权限:ohos.permission.CAMERA
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:4.1.0(11)
参数名 | 类型 | 必填 | 说明 |
|---|---|---|---|
viewControl | 是 | 相机控制参数。 | |
callback | AsyncCallback<Array<scanBarcode.ScanResult>> | 是 | 回调函数,当启动相机流扫码成功,err为undefined,data为获取到的Array<scanBarcode.ScanResult>;否则为错误对象。 |
frameCallback | AsyncCallback<ScanFrame> | 否 | 回调函数,当启动相机流扫码成功,err为undefined,data为获取到的相机预览流(YUV)ScanFrame;否则为错误对象。 起始版本:5.0.0(12) |
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
401 | Parameter error. Possible causes: 1. Incorrect parameter types; 2. Parameter verification failed. |
1000500001 | Internal error. |
示例:
import { hilog } from '@kit.PerformanceAnalysisKit';
import { AsyncCallback, BusinessError } from '@kit.BasicServicesKit';
import { scanBarcode, customScan } from '@kit.ScanKit';
@Entry
@Component
struct customScanPage {
// 设置预览流高度,默认单位:vp
@State cameraHeight: number = 640;
// 设置预览流宽度,默认单位:vp
@State cameraWidth: number = 360;
private mXComponentController: XComponentController = new XComponentController();
// 返回自定义扫描结果的回调
private callback: AsyncCallback<Array<scanBarcode.ScanResult>> =
async (error: BusinessError, result: Array<scanBarcode.ScanResult>) => {
if (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to get ScanResult by callback. Code: ${error.code}, message: ${error.message}`);
return;
}
hilog.info(0x0001, '[Scan Sample]',
`Succeeded in getting ScanResult by callback, result is ${JSON.stringify(result)}`);
}
// 回调获取ScanFrame
private frameCallback: AsyncCallback<customScan.ScanFrame> =
async (error: BusinessError, scanFrame: customScan.ScanFrame) => {
if (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to get ScanFrame by callback. Code: ${error.code}, message: ${error.message}`);
return;
}
hilog.info(0x0001, '[Scan Sample]',
`Succeeded in getting ScanFrame by callback, scanFrame is ${JSON.stringify(scanFrame)}`);
}
build() {
Stack() {
XComponent({
id: 'componentId',
type: XComponentType.SURFACE,
controller: this.mXComponentController
})
.onLoad(() => {
hilog.info(0x0001, '[Scan Sample]', 'Succeeded in loading, onLoad is called');
// 获取XComponent的surfaceId
let surfaceId: string = this.mXComponentController.getXComponentSurfaceId();
hilog.info(0x0001, '[Scan Sample]', `Succeeded in getting surfaceId: ${surfaceId}`);
// 设置ViewControl相应字段
let viewControl: customScan.ViewControl = {
width: this.cameraWidth,
height: this.cameraHeight,
surfaceId: surfaceId
};
try {
customScan.start(viewControl, this.callback, this.frameCallback);
} catch (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to start customScan. Code: ${error.code}, message: ${error.message}`);
}
})
.height(this.cameraHeight)
.width(this.cameraWidth)
.position({ x: 0, y: 0 })
}
.alignContent(Alignment.Bottom)
.height('100%')
.width('100%')
.position({ x: 0, y: 0 })
}
} getFlashLightStatus(): boolean
获取当前相机闪光灯状态。
本接口必须在启动相机流start接口后使用,相机流初始化、停止和释放阶段使用都会抛出内部错误的异常。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:4.1.0(11)
类型 | 说明 |
|---|---|
boolean | 返回当前相机闪光灯状态。true代表开启,false代表关闭。 |
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
1000500001 | Internal error. |
示例:
import { customScan } from '@kit.ScanKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
let flashLightStatus: boolean = false;
try {
flashLightStatus = customScan.getFlashLightStatus();
// 根据当前闪光灯状态,选择打开或关闭闪关灯
if (flashLightStatus) {
try {
customScan.closeFlashLight();
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to closeFlashLight. Code: ${error.code}, message: ${error.message}`);
}
} else {
try {
customScan.openFlashLight();
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to openFlashLight. Code: ${error.code}, message: ${error.message}`);
}
}
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to getFlashLightStatus. Code: ${error.code}, message: ${error.message}`);
} openFlashLight(): void
开启相机闪光灯。
本接口必须在启动相机流start接口后使用,相机流初始化、停止和释放阶段使用都会抛出内部错误的异常。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:4.1.0(11)
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
1000500001 | Internal error. |
示例:
import { customScan } from '@kit.ScanKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
let flashLightStatus: boolean = false;
try {
flashLightStatus = customScan.getFlashLightStatus();
// 根据当前闪光灯状态,选择打开或关闭闪关灯
if (flashLightStatus) {
try {
customScan.closeFlashLight();
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to closeFlashLight. Code: ${error.code}, message: ${error.message}`);
}
} else {
try {
customScan.openFlashLight();
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to openFlashLight. Code: ${error.code}, message: ${error.message}`);
}
}
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to getFlashLightStatus. Code: ${error.code}, message: ${error.message}`);
} closeFlashLight(): void
关闭相机闪光灯。
本接口必须在启动相机流start接口后使用,相机流初始化、停止和释放阶段使用都会抛出内部错误的异常。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:4.1.0(11)
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
1000500001 | Internal error. |
示例:
import { customScan } from '@kit.ScanKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
let flashLightStatus: boolean = false;
try {
flashLightStatus = customScan.getFlashLightStatus();
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to getFlashLightStatus. Code: ${error.code}, message: ${error.message}`);
}
// 根据当前闪光灯状态,选择打开或关闭闪关灯
if (flashLightStatus) {
try {
customScan.closeFlashLight();
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to closeFlashLight. Code: ${error.code}, message: ${error.message}`);
}
} else {
try {
customScan.openFlashLight();
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to openFlashLight. Code: ${error.code}, message: ${error.message}`);
}
} setZoom(zoomValue: number): void
设置变焦比。变焦精度最高为小数点后两位,如果设置超过支持的精度范围,则只保留精度范围内数值。
本接口必须在启动相机流start接口后使用。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:5.0.0(12)
参数名 | 类型 | 必填 | 说明 |
|---|---|---|---|
zoomValue | number | 是 | 相机变焦比,精度最高为小数点后两位(例如1.45)。 |
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
401 | Parameter error. Possible causes: 1. Incorrect parameter types; 2. Parameter verification failed. |
1000500001 | Internal error. |
import { customScan } from '@kit.ScanKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
// 设置变焦比
let zoomValue = 2.0;
try {
customScan.setZoom(zoomValue);
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to setZoom. Code: ${error.code}, message: ${error.message}`);
} getZoom(): number
获取当前的变焦比。
本接口必须在启动相机流start接口后使用。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:5.0.0(12)
类型 | 说明 |
|---|---|
number | 返回当前的变焦比。 |
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
1000500001 | Internal error. |
示例:
import { hilog } from '@kit.PerformanceAnalysisKit';
import { customScan } from '@kit.ScanKit';
try {
// 获取变焦比
let zoomValue = customScan.getZoom();
hilog.info(0x0001, '[Scan Sample]', `Succeeded in getting zoomValue, zoomValue is ${zoomValue}`);
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to get zoomValue. Code: ${error.code}, message: ${error.message}`);
} setFocusPoint(point: scanBarcode.Point): void
设置相机焦点,焦点应在0-1坐标系内,该坐标系左上角为{0,0},右下角为{1,1}。此坐标系是以设备充电口在右侧时的横向设备方向为基准的,例如应用的预览界面布局以设备充电口在下侧时的竖向方向为基准,布局宽高为{w,h},且触碰点为{x,y},则转换后的坐标点为{y/h,1-x/w}。
本接口必须在启动相机流start接口后使用。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:5.0.0(12)
参数名 | 类型 | 必填 | 说明 |
|---|---|---|---|
point | scanBarcode.Point | 是 | 焦点。x、y设置范围应在[0,1]之内,超过范围,如果小于0设置0,大于1设置1。 |
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
401 | Parameter error. Possible causes: 1. Incorrect parameter types; 2. Parameter verification failed. |
1000500001 | Internal error. |
import { customScan } from '@kit.ScanKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
try {
// 设置对焦点
customScan.setFocusPoint({ x: 0.5, y: 0.5 });
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to setFocusPoint. Code: ${error.code}, message: ${error.message}`);
} resetFocus(): void
设置连续自动对焦模式。
本接口必须在启动相机流start接口后使用。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:5.0.0(12)
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
1000500001 | Internal error. |
示例:
import { customScan } from '@kit.ScanKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
try {
// 设置连续自动对焦模式
customScan.resetFocus();
} catch (error) {
hilog.error(0x0001, '[Scan Sample]', `Failed to resetFocus. Code: ${error.code}, message: ${error.message}`);
} on(type: 'lightingFlash', callback: AsyncCallback<boolean>): void
注册闪光灯打开时机回调,当扫码环境昏、亮状态变化时,使用callback异步回调返回打开时机结果。
本接口必须在启动相机流start接口后使用,未启动相机流调用会抛出内部错误的异常。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:5.0.0(12)
参数名 | 类型 | 必填 | 说明 |
|---|---|---|---|
type | string | 是 | 事件回调用类型,固定为'lightingFlash',当扫码环境亮度发生变化建议打开或关闭闪光灯时触发。 |
callback | AsyncCallback<boolean> | 是 | 回调函数。返回true表示当前扫码环境暗,可以打开闪光灯,false表示环境亮,可以关闭闪光灯。 |
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
1000500001 | Internal error. |
示例:
import { BusinessError } from '@kit.BasicServicesKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
import { customScan } from '@kit.ScanKit';
let callback = (error: BusinessError, bool: boolean) => {
if (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to light Flash by callback. Code: ${error.code}, message: ${error.message}`);
return;
}
hilog.info(0x0001, '[Scan Sample]', `Succeeded in lighting Flash by callback, bool is ${bool}`);
}
try {
customScan.on('lightingFlash', callback);
} catch (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to listen lightingFlash. Code: ${error.code}, message: ${error.message}`);
} off(type: 'lightingFlash', callback?: AsyncCallback<boolean>): void
注销闪光灯打开时机回调,使用Callback异步回调返回注销结果。
本接口必须在启动相机流start接口后使用,未启动相机流调用会抛出内部错误的异常。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:5.0.0(12)
参数名 | 类型 | 必填 | 说明 |
|---|---|---|---|
type | string | 是 | 事件回调用类型,固定为'lightingFlash',当扫码环境亮度发生变化建议打开或关闭闪光灯时触发 |
callback | AsyncCallback<boolean> | 否 | 回调函数,可选,有就是匹配on('lightingFlash') callback(callback对象不可是匿名函数)。若无此回调函数,则取消所有绑定在'lightingFlash'上的回调函数。 |
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
1000500001 | Internal error. |
示例:
import { BusinessError } from '@kit.BasicServicesKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
import { customScan } from '@kit.ScanKit';
let callback = (error: BusinessError, bool: boolean) => {
if (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to cancel Flash by callback. Code: ${error.code}, message: ${error.message}`);
return;
}
hilog.info(0x0001, '[Scan Sample]', `Succeeded in cancelling Flash by callback, bool is ${bool}`);
}
// 可以不填callback,取消lightingFlash所有监听。填写callback,必须保持和customScan.on中监听的事件保持一致
try {
customScan.off('lightingFlash', callback);
} catch (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to listen lightingFlash. Code: ${error.code}, message: ${error.message}`);
} rescan(): void
触发一次重新扫码。如果扫描结果不是预期结果,可以调用此接口触发下一次扫描。
本接口必须在启动相机流start接口后,stop接口之前使用,未启动相机流调用会抛出内部错误的异常。
仅对start接口的Callback异步回调有效,Promise异步回调接口无效。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:5.0.0(12)
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
1000500001 | Internal error. |
示例:
import { hilog } from '@kit.PerformanceAnalysisKit';
import { AsyncCallback, BusinessError } from '@kit.BasicServicesKit';
import { scanBarcode, customScan } from '@kit.ScanKit';
@Entry
@Component
struct customScanPage {
// 设置预览流高度,默认单位:vp
@State cameraHeight: number = 640;
// 设置预览流宽度,默认单位:vp
@State cameraWidth: number = 360;
private mXComponentController: XComponentController = new XComponentController();
// 返回自定义扫描结果的回调
private callback: AsyncCallback<Array<scanBarcode.ScanResult>> =
async (error: BusinessError, result: Array<scanBarcode.ScanResult>) => {
if (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to get ScanResult by callback. Code: ${error.code}, message: ${error.message}`);
return;
}
hilog.info(0x0001, '[Scan Sample]',
`Succeeded in getting ScanResult by callback, result is ${JSON.stringify(result)}`);
// 重新触发扫码。如需不重启相机并重新触发一次扫码,可以在start接口的Callback异步回调中,调用rescan接口。
try {
customScan.rescan();
} catch (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to rescan customScan. Code: ${error.code}, message: ${error.message}`);
}
}
build() {
Stack() {
XComponent({
id: 'componentId',
type: XComponentType.SURFACE,
controller: this.mXComponentController
})
.onLoad(() => {
hilog.info(0x0001, '[Scan Sample]', 'Succeeded in loading, onLoad is called');
// 获取XComponent的surfaceId
let surfaceId: string = this.mXComponentController.getXComponentSurfaceId();
hilog.info(0x0001, '[Scan Sample]', `Succeeded in getting surfaceId: ${surfaceId}`);
// 设置ViewControl相应字段
let viewControl: customScan.ViewControl = {
width: this.cameraWidth,
height: this.cameraHeight,
surfaceId: surfaceId
};
try {
customScan.start(viewControl, this.callback);
} catch (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to start customScan. Code: ${error.code}, message: ${error.message}`);
}
})
.height(this.cameraHeight)
.width(this.cameraWidth)
.position({ x: 0, y: 0 })
}
.alignContent(Alignment.Bottom)
.height('100%')
.width('100%')
.position({ x: 0, y: 0 })
}
} stop(): Promise<void>
暂停扫码相机流,使用Promise异步回调。
本接口必须在启动相机流start接口后使用,未启动相机流调用会抛出内部错误的异常。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:4.1.0(11)
类型 | 说明 |
|---|---|
Promise<void> | Promise对象。无返回结果的Promise对象。 |
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
1000500001 | Internal error. |
示例:
import { hilog } from '@kit.PerformanceAnalysisKit';
import { customScan } from '@kit.ScanKit';
import { BusinessError } from '@kit.BasicServicesKit';
try {
customScan.stop().then(() => {
hilog.info(0x0001, '[Scan Sample]', 'Succeeded in stopping scan by promise');
}).catch((error: BusinessError) => {
hilog.error(0x0001, '[Scan Sample]',
`Failed to stop scan by promise. Code: ${error.code}, message: ${error.message}`);
});
} catch (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to stop customScan. Code: ${error.code}, message: ${error.message}`);
} stop(callback: AsyncCallback<void>): void
暂停扫码相机流,使用Callback异步回调。
本接口必须在启动相机流start接口后使用,未启动相机流调用会抛出内部错误的异常。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:4.1.0(11)
参数名 | 类型 | 必填 | 说明 |
|---|---|---|---|
callback | AsyncCallback<void> | 是 | 回调函数。当暂停相机流成功,err为undefined,否则为错误对象。 |
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
1000500001 | Internal error. |
import { hilog } from '@kit.PerformanceAnalysisKit';
import { customScan } from '@kit.ScanKit';
import { BusinessError } from '@kit.BasicServicesKit';
try {
customScan.stop((error: BusinessError) => {
if (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to stop scan by callback. Code: ${error.code}, message: ${error.message}`);
return;
}
hilog.info(0x0001, '[Scan Sample]', 'Succeeded in stopping scan by callback');
})
} catch (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to stop customScan. Code: ${error.code}, message: ${error.message}`);
} release(): Promise<void>
释放扫码相机流,使用Promise异步回调。
本接口建议在启动相机流start接口且暂停相机流stop接口后使用,未启动相机流调用会抛出内部错误的异常。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:4.1.0(11)
类型 | 说明 |
|---|---|
Promise<void> | Promise对象。无返回结果的Promise对象。 |
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
1000500001 | Internal error. |
import { hilog } from '@kit.PerformanceAnalysisKit';
import { customScan } from '@kit.ScanKit';
import { BusinessError } from '@kit.BasicServicesKit';
try {
customScan.release().then(() => {
hilog.info(0x0001, '[Scan Sample]', 'Succeeded in releasing scan by promise');
}).catch((error: BusinessError) => {
hilog.error(0x0001, '[Scan Sample]',
`Failed to release scan by promise. Code: ${error.code}, message: ${error.message}`);
})
} catch (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to release customScan. Code: ${error.code}, message: ${error.message}`);
} release(callback: AsyncCallback<void>): void
释放扫码相机流,使用Callback异步回调。
本接口建议在启动相机流start接口且暂停相机流stop接口后使用,未启动相机流调用会抛出内部错误的异常。
系统能力:SystemCapability.Multimedia.Scan.ScanBarcode
起始版本:4.1.0(11)
参数名 | 类型 | 必填 | 说明 |
|---|---|---|---|
callback | AsyncCallback<void> | 是 | 回调函数。当释放相机流成功,err为undefined,否则为错误对象。 |
错误码:
以下错误码的详细介绍请参见ArkTS API错误码。
错误码ID | 错误信息 |
|---|---|
1000500001 | Internal error. |
示例:
import { hilog } from '@kit.PerformanceAnalysisKit';
import { customScan } from '@kit.ScanKit';
import { BusinessError } from '@kit.BasicServicesKit';
try {
customScan.release((error: BusinessError) => {
if (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to release scan by callback. Code: ${error.code}, message: ${error.message}`);
return;
}
hilog.info(0x0001, '[Scan Sample]', 'Succeeded in releasing scan by callback');
});
} catch (error) {
hilog.error(0x0001, '[Scan Sample]',
`Failed to release customScan. Code: ${error.code}, message: ${error.message}`);
}