跳过网络，从内存中取图片
Signed-off-by: ‘593378212@qq.com’ <‘xinxin2.wang@epro.com.cn’>
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‘593378212@qq.com’
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7d28670317
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182f56c503
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/*
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* Copyright (C) 2022 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import {
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ImageKnifeComponent,
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ImageKnifeOption,
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ImageKnifeGlobal,
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ImageKnife,
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ImageKnifeData
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} from '@ohos/libraryimageknife'
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import image from '@ohos.multimedia.image';
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import { BusinessError } from '@ohos.base';
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let imageKnife: ImageKnife | undefined = ImageKnifeGlobal.getInstance().getImageKnife();
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@Entry
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@Component
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struct testImageKnifeCache {
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@State url: string = '';
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@State url1: string = '';
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@State imagePixelMap: PixelMap | undefined = undefined;
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@State gifPixelMap: PixelMap | undefined = undefined;
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@State imageKnifeOption1: ImageKnifeOption =
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{
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loadSrc: $r('app.media.icon'),
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placeholderSrc: $r('app.media.icon_loading'),
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errorholderSrc: $r('app.media.icon_failed')
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};
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@State imageKnifeOption2: ImageKnifeOption =
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{
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loadSrc: $r('app.media.icon'),
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placeholderSrc: $r('app.media.icon_loading'),
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errorholderSrc: $r('app.media.icon_failed')
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};
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hasUrlCache(url: string) {
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imageKnife?.isUrlExist(url).then((data: ImageKnifeData) => {
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if (data.isPixelMap()) {
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if (data.drawPixelMap) {
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let pixelmap = data.drawPixelMap.imagePixelMap
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if (pixelmap) {
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this.imagePixelMap = pixelmap;
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}
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}
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}
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if (data.isGIFFrame()) {
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let index: number = 0
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let timeId = -1;
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clearTimeout(timeId);
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if (data.drawGIFFrame) {
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if (data.drawGIFFrame.imageGIFFrames) {
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let renderGif = () => {
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if (data.drawGIFFrame) {
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if (data.drawGIFFrame.imageGIFFrames) {
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let pixelmap = data.drawGIFFrame.imageGIFFrames[index].drawPixelMap
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let delay = data.drawGIFFrame.imageGIFFrames[index].delay
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if (pixelmap) {
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this.gifPixelMap = pixelmap;
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}
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index++;
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if (index == data.drawGIFFrame.imageGIFFrames.length - 1) {
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index = 0
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}
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timeId = setTimeout(renderGif, data!.drawGIFFrame!.imageGIFFrames![index].delay)
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}
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}
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}
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renderGif()
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}
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}
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}
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}).catch((err:BusinessError)=>{
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});
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}
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build() {
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Scroll() {
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Column() {
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Text('图片内存和磁盘读取').fontSize(30);
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Text('加载的缓存时候关闭掉网络').fontSize(15);
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Button('加载静态图片')
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.onClick(() => {
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this.imageKnifeOption1 =
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{
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loadSrc: this.url,
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placeholderSrc: $r('app.media.icon_loading'),
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errorholderSrc: $r('app.media.icon_failed')
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}
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})
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ImageKnifeComponent({ imageKnifeOption: this.imageKnifeOption1 })
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.width('100%')
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.height(200)
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.backgroundColor(Color.Orange)
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Button('加载缓存静态图片')
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.onClick(() => {
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this.imageKnifeOption1 =
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{
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loadSrc: this.url,
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placeholderSrc: $r('app.media.icon_loading'),
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errorholderSrc: $r('app.media.icon_failed')
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}
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})
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ImageKnifeComponent({
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imageKnifeOption: {
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loadSrc: this.imagePixelMap as image.PixelMap
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}
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})
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.width('100%')
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.height(200)
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.backgroundColor(Color.Orange)
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Button('加载动态图片')
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.onClick(() => {
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this.imageKnifeOption2 =
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{
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loadSrc: this.url1,
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placeholderSrc: $r('app.media.icon_loading'),
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errorholderSrc: $r('app.media.icon_failed')
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}
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})
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ImageKnifeComponent({ imageKnifeOption: this.imageKnifeOption2 })
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.width('100%')
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.height(200)
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.backgroundColor(Color.Orange)
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Button('加载缓存动态图片')
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.onClick(() => {
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this.imageKnifeOption2 =
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{
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loadSrc: this.url1,
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placeholderSrc: $r('app.media.icon_loading'),
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errorholderSrc: $r('app.media.icon_failed')
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}
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})
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ImageKnifeComponent({
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imageKnifeOption: {
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loadSrc: this.gifPixelMap as image.PixelMap
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}
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})
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.width('100%')
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.height(200)
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.backgroundColor(Color.Orange)
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}
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.alignItems(HorizontalAlign.Center)
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.width('100%')
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}
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.width('100%')
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.height('100%')
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}
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aboutToAppear() {
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}
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aboutToDisappear() {
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}
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onBackPress() {
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}
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}
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@ -44,6 +44,9 @@ import { MemoryLruCache } from '../cache/MemoryLruCache'
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import { BusinessError } from '@ohos.base'
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import { IParseImage } from './interface/IParseImage'
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import { ParseImageUtil } from './utils/ParseImageUtil'
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import { GIFParseImpl } from './utils/gif/GIFParseImpl'
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import { GIFFrame } from './utils/gif/GIFFrame'
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import { SVGParseImpl } from './utils/svg/SVGParseImpl'
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export class ImageKnife {
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static readonly SEPARATOR: string = '/'
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@ -218,17 +221,16 @@ export class ImageKnife {
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}
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public isUrlExist(url: string): Promise<PixelMap> {
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public isUrlExist(url: string): Promise<ImageKnifeData> {
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return new Promise((resolve, reject) => {
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let request1 = new RequestOption();
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request1.loadSrc = url;
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let request = this.loadResourcesCaches(request1);
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let loadComplete = (ImageKnifeData: ImageKnifeData) => {
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let pixelMap: PixelMap | undefined;
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pixelMap = ImageKnifeData?.drawPixelMap?.imagePixelMap;
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resolve(pixelMap as PixelMap);
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let loadComplete = (imageKnifeData: ImageKnifeData) => {
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this.memoryCache.put(request.generateCacheKey, imageKnifeData);
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resolve(imageKnifeData);
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}
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let loadError = (err ?: BusinessError | string) => {
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reject(undefined);
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@ -237,7 +239,7 @@ export class ImageKnife {
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})
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}
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loadMemoryCacheAndDiskFrom(request: RequestOption, onComplate: (ImageKnifeData: ImageKnifeData) => void | PromiseLike<ImageKnifeData>, onError: (err?: BusinessError | string) => void) {
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loadMemoryCacheAndDiskFrom(request: RequestOption, onComplete: (imageKnifeData: ImageKnifeData) => void | PromiseLike<ImageKnifeData>, onError: (err?: BusinessError | string) => void) {
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let cache = this.memoryCache.get(request.generateCacheKey);
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if (cache == null || typeof cache == 'undefined') {
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let cached = this.diskMemoryCache.get(request.generateDataKey);
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@ -246,13 +248,46 @@ export class ImageKnife {
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cached = this.diskMemoryCache.get(request.generateResourceKey);
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}
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if (cached != null) {
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//5.磁盘有数据，解析错误返回onError
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let success = (value: PixelMap) => {
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let imageKnifeData = ImageKnifeData.createImagePixelMap(ImageKnifeType.PIXELMAP, value);
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this.memoryCache.put(request.generateCacheKey, imageKnifeData);
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onComplate(imageKnifeData);
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let filetype:string | null =this.fileTypeUtil.getFileType(cached);
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if (filetype ==null){
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onError('请检查数据源');
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return;
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}
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this.mParseImageUtil.parseImage(cached, success, onError)
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if (!this.fileTypeUtil.isImage(cached)){
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onError('暂不支持的类型！类型='+filetype);
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}
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if (ImageKnifeData.GIF == filetype&&!request.dontAnimateFlag){
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let gifParseImpl = new GIFParseImpl()
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gifParseImpl.parseGifs(cached, (data?:GIFFrame[],err?:BusinessError|string)=>{
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if(err){
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onError(err)
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}
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LogUtil.log("gifProcess data is null:"+(data == null));
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if(!!data){
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let imageKnifeData = ImageKnifeData.createImageGIFFrame(ImageKnifeType.GIFFRAME,data);
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LogUtil.log('gifProcess 生成gif 返回数据类型')
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onComplete(imageKnifeData)
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}else{
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onError('Parse GIF callback data is null, you need check callback data!')
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}
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})
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}else if (ImageKnifeData.SVG == filetype){
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let svgParseImpl = new SVGParseImpl()
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svgParseImpl.parseSvg(request,cached, onComplete,onError)
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}else {
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//5.磁盘有数据，解析错误返回onError
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let success = (value: PixelMap) => {
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let imageKnifeData = ImageKnifeData.createImagePixelMap(ImageKnifeType.PIXELMAP, value);
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onComplete(imageKnifeData);
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}
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this.mParseImageUtil.parseImage(cached, success, onError)
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}
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} else {
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//6.磁盘无数据，返回onError
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onError("网络缓存and磁盘缓存无数据！")
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@ -261,7 +296,7 @@ export class ImageKnife {
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//需要清理状态
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cache.waitSaveDisk = false;
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//2.网络缓存有数据，返回
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onComplate(cache);
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onComplete(cache);
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}
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}
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