问答专区-华为/鸿蒙开发者论坛-华为开发者联盟

https://developer.huawei.com/consumer/cn/doc/harmonyos-references/ts-inputeventmonitor#inputeventmonitorapi26 新增了能够获取所有输入的接口,但是我用 addLocalInputEventMonitor 能够获取到用户按了 meta按键这种特殊按键,但是会触发系统弹出开始菜单, 有什么办法,能够完全拦截按键输入嘛, 而不让系统响应? (C API的那个我知道,仅考虑当前这个)import { InputEventLog } from '../model/InputEventLog'; const MAX_EVENTS: number = 200; @Entry @Component struct Index { @State events: InputEventLog[] = []; @State isMonitoring: boolean = false; @State isBlocking: boolean = false; @State totalCount: number = 0; private monitor: InputEventMonitor | undefined = undefined; private nextId: number = 0; aboutToAppear(): void { this.startMonitor(); } aboutToDisappear(): void { this.stopMonitor(); } startMonitor(): void { if (this.isMonitoring) { return; } const ctx = this.getUIContext(); const listener: InputEventListener = (wrapper: RawInputEventWrapper): InputEventInterceptResult => { const log: InputEventLog = new InputEventLog(); log.id = this.nextId; this.nextId = this.nextId + 1; log.timestamp = this.formatTime(); if (wrapper.isKeyEvent()) { const keyEvt = wrapper.asKeyEvent(); if (keyEvt !== null) { log.eventType = 'KEY'; const actionStr: string = keyEvt.type === KeyType.Down ? 'DOWN' : 'UP'; log.detail = `code=${keyEvt.keyCode} text=${keyEvt.keyText}`; } else { log.eventType = 'KEY'; log.detail = 'null key event'; } } else if (wrapper.isMouseEvent()) { const mouseEvt = wrapper.asMouseEvent(); if (mouseEvt !== null) { log.eventType = 'MOUSE'; const actStr: string = this.mouseActionName(mouseEvt.action); const btnStr: string = this.mouseButtonName(mouseEvt.button); log.detail = `${actStr} btn=${btnStr} x=${mouseEvt.windowX} y=${mouseEvt.windowY}`; } else { log.eventType = 'MOUSE'; log.detail = 'null mouse event'; } } else if (wrapper.isTouchEvent()) { const touchEvt = wrapper.asTouchEvent(); if (touchEvt !== null) { log.eventType = 'TOUCH'; const touchStr: string = this.touchTypeName(touchEvt.type); log.detail = `${touchStr} fingers=${touchEvt.touches.length}`; } else { log.eventType = 'TOUCH'; log.detail = 'null touch event'; } } else { log.eventType = 'OTHER'; log.detail = 'unknown'; } this.appendEvent(log); if (this.isBlocking) { const result: InputEventInterceptResult = { action: InputEventInterceptAction.BLOCK }; return result; } const result: InputEventInterceptResult = { action: InputEventInterceptAction.CONTINUE }; return result; }; const eventMask: number = InputEventSubTypeMask.LEFT_MOUSE_DOWN | InputEventSubTypeMask.LEFT_MOUSE_UP | InputEventSubTypeMask.RIGHT_MOUSE_DOWN | InputEventSubTypeMask.RIGHT_MOUSE_UP | InputEventSubTypeMask.MIDDLE_MOUSE_DOWN | InputEventSubTypeMask.MIDDLE_MOUSE_UP | InputEventSubTypeMask.LEFT_MOUSE_DRAGGING | InputEventSubTypeMask.RIGHT_MOUSE_DRAGGING | InputEventSubTypeMask.MIDDLE_MOUSE_DRAGGING | InputEventSubTypeMask.TOUCH_DOWN | InputEventSubTypeMask.TOUCH_UP | InputEventSubTypeMask.KEY_DOWN | InputEventSubTypeMask.KEY_UP; this.monitor = ctx.addLocalInputEventMonitor(eventMask, listener); this.isMonitoring = true; } stopMonitor(): void { if (this.monitor !== undefined) { this.getUIContext().removeLocalInputEventMonitor(this.monitor); this.monitor = undefined; } this.isMonitoring = false; } clearEvents(): void { this.events = []; } appendEvent(log: InputEventLog): void { const newList: InputEventLog[] = [log]; const limit: number = MAX_EVENTS - 1; const len: number = this.events.length; const count: number = len < limit ? len : limit; for (let i = 0; i < count; i++) { newList.push(this.events[i]); } this.events = newList; this.totalCount = this.totalCount + 1; } mouseActionName(action: number): string { if (action === 1) { return 'PRESS'; } if (action === 2) { return 'MOVE'; } if (action === 3) { return 'RELEASE'; } return `A${action}`; } mouseButtonName(button: number): string { if (button === 0) { return 'NONE'; } if (button === 1) { return 'LEFT'; } if (button === 2) { return 'RIGHT'; } if (button === 3) { return 'MID'; } if (button === 4) { return 'BACK'; } if (button === 5) { return 'FWD'; } return `B${button}`; } touchTypeName(type: TouchType): string { if (type === TouchType.Down) { return 'DOWN'; } if (type === TouchType.Up) { return 'UP'; } if (type === TouchType.Move) { return 'MOVE'; } if (type === TouchType.Cancel) { return 'CANCEL'; } return `T${type}`; } getTypeColor(type: string): string { if (type === 'KEY') { return '#E74C3C'; } if (type === 'MOUSE') { return '#3498DB'; } if (type === 'TOUCH') { return '#2ECC71'; } return '#95A5A6'; } formatTime(): string { const d: Date = new Date(); const h: number = d.getHours(); const m: number = d.getMinutes(); const s: number = d.getSeconds(); const ms: number = d.getMilliseconds(); const hStr: string = h < 10 ? '0' + h.toString() : h.toString(); const mStr: string = m < 10 ? '0' + m.toString() : m.toString(); const sStr: string = s < 10 ? '0' + s.toString() : s.toString(); const msStr: string = ms < 100 ? (ms < 10 ? '00' + ms.toString() : '0' + ms.toString()) : ms.toString(); return `${hStr}:${mStr}:${sStr}.${msStr}`; } build() { Column() { Row() { Text('Input Monitor') .fontSize(18) .fontWeight(FontWeight.Bold) .fontColor('#FFFFFF') Blank() Text(this.isMonitoring ? (this.isBlocking ? '● BLOCK' : '● LIVE') : '○ STOPPED') .fontSize(11) .fontColor(this.isMonitoring ? '#2ECC71' : '#E74C3C') } .width('100%') .padding({ left: 16, right: 16, top: 12, bottom: 12 }) .backgroundColor('#2C3E50') Row() { Button(this.isMonitoring ? 'Stop' : 'Start') .fontSize(13) .type(ButtonType.Capsule) .backgroundColor(this.isMonitoring ? '#E74C3C' : '#2ECC71') .fontColor('#FFFFFF') .onClick(() => { if (this.isMonitoring) { this.stopMonitor(); } else { this.startMonitor(); } }) Button(this.isBlocking ? 'Block ON' : 'Block OFF') .fontSize(13) .type(ButtonType.Capsule) .backgroundColor(this.isBlocking ? '#E74C3C' : '#95A5A6') .fontColor('#FFFFFF') .margin({ left: 8 }) .onClick(() => { this.isBlocking = !this.isBlocking; }) Button('Clear') .fontSize(13) .type(ButtonType.Capsule) .backgroundColor('#3498DB') .fontColor('#FFFFFF') .margin({ left: 8 }) .onClick(() => { this.clearEvents(); }) } .width('100%') .padding({ left: 16, right: 16, top: 10, bottom: 10 }) Row() { Text(`Total: ${this.totalCount}`) .fontSize(11) .fontColor(Color.Gray) Blank() Text(`Display: ${this.events.length}/${MAX_EVENTS}`) .fontSize(11) .fontColor(Color.Gray) } .width('100%') .padding({ left: 16, right: 16, bottom: 8 }) if (this.events.length === 0) { Column() { Text('Waiting for input events...') .fontSize(14) .fontColor('#AAAAAA') Text('Press keys / move mouse / touch screen') .fontSize(11) .fontColor('#CCCCCC') .margin({ top: 4 }) } .width('100%') .layoutWeight(1) .justifyContent(FlexAlign.Center) } else { List() { ForEach(this.events, (item: InputEventLog) => { ListItem() { Row() { Text(`[${item.eventType}]`) .fontColor(this.getTypeColor(item.eventType)) .fontWeight(FontWeight.Bold) .fontSize(10) .margin({ right: 6 }) Text(item.detail) .fontSize(11) .layoutWeight(1) .maxLines(1) .textOverflow({ overflow: TextOverflow.Ellipsis }) Text(item.timestamp) .fontSize(9) .fontColor('#AAAAAA') } .width('100%') .padding({ left: 16, right: 16, top: 7, bottom: 7 }) .alignItems(VerticalAlign.Center) } }, (item: InputEventLog) => item.id.toString()) } .width('100%') .layoutWeight(1) .divider({ strokeWidth: 0.5, color: '#EEEEEE' }) } } .width('100%') .height('100%') .backgroundColor('#F8F9FA') } }

社区

社区

HarmonyOS 5

HarmonyOS 6

DevEco Studio

UI

HarmonyOS

ArkUI (方舟UI框架)

App开发

Ability框架

应用媒体