HarmonyOS 鸿蒙Next屏幕截图使用不了

或者使用窗口截图：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-window-V5#snapshot9

可以使用上述答复的第二种方案实现。使用窗口截图，参考代码：

EntryAbility.ets

onWindowStageCreate(windowStage: window.WindowStage): void {
  ...
    AppStorage.setOrCreate('windowStage', windowStage);
   ...
  }

===================================

xxx.ets

import { BusinessError } from '@kit.BasicServicesKit';
import { image } from '@kit.ImageKit';
import { window } from '@kit.ArkUI';
@Entry
@Component
struct xxx{
@State snapshotPixelMap: image.PixelMap | null = null;
build() {
Column() {
Button(“snapshot”).onClick(() => {
try {
this.snapshot()
} catch (err) {
console.error(“errCode:” + (err as BusinessError).code + “,errMessage:” + (err as BusinessError).message);
}
})
  Image(<span class="hljs-keyword">this</span>.snapshotPixelMap).width(<span class="hljs-number">200</span>).height(<span class="hljs-number">200</span>).objectFit(ImageFit.ScaleDown).borderWidth(<span class="hljs-number">1</span>)
}
}
snapshot() {
let windowStage = AppStorage.get(“windowStage”) as window.WindowStage
try {
let windowClass = windowStage.getMainWindowSync();
windowClass.snapshot((err: BusinessError, pixelMap: image.PixelMap) => {
const errCode: number = err.code;
if (errCode) {
console.error(‘Failed to snapshot window. Cause:’ + JSON.stringify(err));
return;
}
    console.info(<span class="hljs-string">'Succeeded in snapshotting window. Pixel bytes number: '</span> + pixelMap.getPixelBytesNumber());
    <span class="hljs-keyword">this</span>.snapshotPixelMap = pixelMap
    <span class="hljs-comment">// pixelMap.release(); // PixelMap使用完后及时释放内存</span>
  });
} <span class="hljs-keyword">catch</span> (exception) {
  console.error(`Failed to obtain the main window. Cause code: ${exception.code}, message: ${exception.message}`);
}
}
}

无法做到指定位置，只提供了组件截图，用这个componentSnapshot的方法。

可以使用窗口截图获取到的 pixelMap，再对pixelMap进行处理，使用crop方法进行裁剪。图像crop方法api地址：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-image-V5#ZH-CN_TOPIC_0000001884758670__crop9

尝试下这个demo：

import { BusinessError } from ‘@kit.BasicServicesKit’;
import { image } from ‘@kit.ImageKit’;
import { window } from ‘@kit.ArkUI’;

@Entry
@Component
struct Index {
@State snapshotPixelMap: image.PixelMap | null = null;
build() {
Column({ space: 10 }) {
Text(“111”).width(“100%”).backgroundColor(Color.Pink)
Text(“111”).width(“100%”).backgroundColor(Color.Pink)
Text(“111”).width(“100%”).backgroundColor(Color.Pink)
Button(“snapshot”).onClick(() => {
try {
this.snapshot()
} catch (err) {
console.error(“errCode:” + (err as BusinessError).code + “,errMessage:” + (err as BusinessError).message);
}
})
  Image(<span class="hljs-keyword">this</span>.snapshotPixelMap).width(<span class="hljs-number">200</span>).height(<span class="hljs-number">200</span>).objectFit(ImageFit.ScaleDown).borderWidth(<span class="hljs-number">1</span>).backgroundColor(Color.Green)
}.width(<span class="hljs-string">"100%"</span>).height(<span class="hljs-string">"100%"</span>)
.backgroundColor(Color.Yellow)
}
snapshot() {
let windowStage = AppStorage.get(“windowStage”) as window.WindowStage
try {
let windowClass = windowStage.getMainWindowSync();
windowClass.snapshot((err: BusinessError, pixelMap: image.PixelMap) => {
const errCode: number = err.code;
if (errCode) {
console.error(‘Failed to snapshot window. Cause:’ + JSON.stringify(err));
return;
}
    console.info(<span class="hljs-string">'Succeeded in snapshotting window. Pixel bytes number: '</span> + pixelMap.getPixelBytesNumber());
    <span class="hljs-keyword">let</span> region: image.Region = { x: <span class="hljs-number">600</span>, y: <span class="hljs-number">0</span>, size: { height: <span class="hljs-number">1200</span>, width: <span class="hljs-number">400</span> } };

    <span class="hljs-keyword">if</span> (pixelMap != <span class="hljs-literal">undefined</span>) {
      pixelMap.cropSync(region)
      <span class="hljs-keyword">this</span>.snapshotPixelMap = pixelMap
    }
    <span class="hljs-comment">// pixelMap.release(); // PixelMap使用完后及时释放内存</span>
  });
} <span class="hljs-keyword">catch</span> (exception) {
  console.error(`Failed to obtain the main window. Cause code: ${exception.code}, message: ${exception.message}`);
}
}
}