HarmonyOS原子化服务开发实战-Js更新显示本

1、蛟龙腾飞练习作品 HarmonyOS原子化服务开发实战-Js更新显示本地图片使用js显示本地卡片一般步骤：获取本地图片路径/ 获取相册的图片与视频private void getImage() HiL(TAG,打开相册); Intent intent = new Intent(); Operation opt=new Intent.OperationBuilder().withAction(ent.action.GET_CONTENT).build(); intent.setOperation(opt); intent.addFlags(Intent.FLA

2、G_NOT_OHOS_COMPONENT); intent.setType(image/*); intent.setBundle(com.huawei.photos); startAbilityForResult(intent, imgRequestCode);/ 图片选取回调Overrideprotected void onAbilityResult(int requestCode, int resultCode, Intent resultData) if(requestCode=imgRequestCode) HiL(TAG, 选择图片getUriString: + res

3、ultData.getUriString(); /选择的Img对应的Uri String chooseImgUri = resultData.getUriString(); /获取选择的Img对应的Id String chooseImgId=null; /如果是选择文件则getUriString结果为content:/viders.media.documents/document/image%3A30，其中%3A是:的URL编码结果，后面的数字就是image对应的Id /如果选择的是图库则getUriString结果为content:/media/external

4、/images/media/30，最后就是image对应的Id /这里需要判断是选择了文件还是图库 if(chooseImgUri.lastIndexOf(%3A)!=-1) chooseImgId = chooseImgUri.substring(chooseImgUri.lastIndexOf(%3A)+3); else chooseImgId = chooseImgUri.substring(chooseImgUri.lastIndexOf(/)+1); /获取图片对应的uri，由于获取到的前缀是content，我们替换成对应的dataability前缀 Uri uri=Uri.appe

5、ndEncodedPathToUri(AVStorage.Images.Media.EXTERNAL_DATA_ABILITY_URI,chooseImgId); HiL(TAG,图片uri+uri); setImaData(uri,chooseImgId); 将本地图片转换成byte数据/定义数据能力帮助对象DataAbilityHelper helper = DataAbilityHelper.creator(getContext();FileInputStream inputStream = null;try inputStream = new FileInputStrea

6、m(helper.openFile(uri, r); catch (DataAbilityRemoteException|FileNotFoundException e) e.printStackTrace();/readInputStream将inputStream转换成bytebyte bytes = readInputStream(inputStream); private byte readInputStream(InputStream inputStream) ByteArrayOutputStream baos = new ByteArrayOutputStream(); byte

7、 buffer = new byte1024; int length = -1; try while (length = inputStream.read(buffer) != -1) baos.write(buffer, 0, length); baos.flush(); catch (IOException e) e.printStackTrace(); byte data = baos.toByteArray(); try inputStream.close(); baos.close(); catch (IOException e) e.printStackTrace(); retur

8、n data;卡片显示图片ZSONObject result = new ZSONObject();FormBindingData formBindingData = new FormBindingData(result);if (bytes != null & bytes.length != 0) String picName = new Date().getTime() + .png; String picPath = memory:/ + picName; result.put(avatarIma, picPath); formBindingData.addImageData(picName, bytes);try if (this instanceof Ability) for (CardDataTable formtable : ge