HarmonyOS应用开发-Doodle图像编辑主键体验

1、蛟龙腾飞学习分享材料HarmonyOS应用开发-Doodle图像编辑主键体验演示视频：效果图如下所示： 该组件有画笔缩放，旋转等功能，可以自定义布局，掉用其接口完成图片编辑的功能。部分代码：public class MainAbility extends Ability private static final int PERMISSION_REQUEST_INTERACTIVE = 1; private static final int REQ_CODE_SELECT_IMAGE = 100; private static final int REQ_CODE_DOODLE = 101; p

2、rivate final static int mDuration = 20000; private Text mPath; private Image mSaveImg; private DataAbilityHelper mHelper; private boolean mIsOpenImageSelector = false; private final static String mPermmReadMedia = ohos.permission.READ_MEDIA; Override public void onStart(Intent intent) super.onStart(

3、intent); setUIContent(ResourceTable.Layout_ability_main); requestPermissionsFromUser(new StringSystemPermission.READ_USER_STORAGE, SystemPermission.WRITE_USER_STORAGE, SystemPermission.READ_MEDIA, SystemPermission.WRITE_MEDIA, SystemPermission.MEDIA_LOCATION, PERMISSION_REQUEST_INTERACTIVE); mSaveIm

4、g = (Image) findComponentById(ResourceTable.Id_img); findComponentById(ResourceTable.Id_btn_select_image).setClickedListener(new Component.ClickedListener() Override public void onClick(Component component) checkPermission(); ); findComponentById(ResourceTable.Id_btn_guide).setClickedListener(new Co

5、mponent.ClickedListener() Override public void onClick(Component component) Intent intent = new Intent(); Operation operation = new Intent.OperationBuilder() .withDeviceId().withBundleName(getBundleName() .withAbilityName(com.example.doodledemo.guide.DoodleGuideAbility).build(); intent.setOperation(

6、operation); startAbility(intent); ); findComponentById(ResourceTable.Id_btn_mosaic).setClickedListener(new Component.ClickedListener() Override public void onClick(Component component) Intent intent = new Intent(); Operation operation = new Intent.OperationBuilder() .withDeviceId().withBundleName(ge

7、tBundleName() .withAbilityName(com.example.doodledemo.MosaicDemo).build(); intent.setOperation(operation); startAbility(intent); ); findComponentById(ResourceTable.Id_btn_scale_gesture).setClickedListener(new Component.ClickedListener() Override public void onClick(Component component) Intent intent

8、 = new Intent(); Operation operation = new Intent.OperationBuilder() .withDeviceId().withBundleName(getBundleName() .withAbilityName(com.example.doodledemo.ScaleGestureItemDemoAbility) .build(); intent.setOperation(operation); startAbility(intent); ); mPath = (Text) findComponentById(ResourceTable.I

9、d_img_path); private void checkPermission() if (verifySelfPermission(mPermmReadMedia) != IBundleManager.PERMISSION_GRANTED) / 应用未被授予权限 if (canRequestPermission(mPermmReadMedia) / 是否可以申请弹框授权(首次申请或者用户未选择禁止且不再提示) requestPermissionsFromUser( new StringmPermmReadMedia, PERMISSION_REQUEST_INTERACTIVE); el

10、se if (!mIsOpenImageSelector) Intent intent = new Intent(); intent.setParam(ImageSelectorActivity.KEY_IS_MULTIPLE_CHOICE, false); intent.setParam(ImageSelectorActivity.KEY_MAX_COUNT, Integer.MAX_VALUE); Operation operation = new Intent.OperationBuilder() .withDeviceId() .withBundleName(getBundleName

11、() .withAbilityName(com.example.doodle.imagepicker.ImageSelectorActivity) .build(); intent.setOperation(operation); mIsOpenImageSelector = !mIsOpenImageSelector; startAbilityForResult(intent, REQ_CODE_SELECT_IMAGE); Override public void onRequestPermissionsFromUserResult(int requestCode, String perm

12、issions, int grantResults) super.onRequestPermissionsFromUserResult(requestCode, permissions, grantResults); if (requestCode = PERMISSION_REQUEST_INTERACTIVE) if (!(grantResults.length 0 & grantResults0 = IBundleManager.PERMISSION_GRANTED) Toast.showLong(this, 请前往“设置”授予“存储访问权限”); Override protected

13、void onOrientationChanged(AbilityInfo.DisplayOrientation displayOrientation) super.onOrientationChanged(displayOrientation); Override protected void onAbilityResult(int requestCode, int resultCode, Intent resultData) super.onAbilityResult(requestCode, resultCode, resultData); if (requestCode = REQ_C

14、ODE_SELECT_IMAGE) mIsOpenImageSelector = false; if (resultData = null) return; if (resultCode = ImageSelectorActivity.RESULT_OK) Intent intent = new Intent(); Uri uri = resultData.getUri(); intent.setUriAndType(uri, null); Operation operation = new Intent.OperationBuilder() .withDeviceId() .withBund

15、leName(getBundleName() .withAbilityName(com.example.doodle.DoodleAbility) .build(); intent.setOperation(operation); startAbilityForResult(intent, REQ_CODE_DOODLE); else if (requestCode = REQ_CODE_DOODLE) if (resultData = null) return; if (resultCode = DoodleAbility.RESULT_OK) Uri uri = resultData.ge

16、tUri(); String path = resultData.getStringParam(DoodleAbility.KEY_IMAGE_PATH); if (TextTool.isNullOrEmpty(path) return; showSavePic(uri); mPath.setText(path); LogUtil.d(onAbilityResult, path= + path); else if (resultCode = DoodleAbility.RESULT_ERROR) ToastDialog toastDialog = new ToastDialog(this);

17、toastDialog.setText(error).setAlignment(1).setDuration(mDuration).show(); private void showSavePic(Uri uri) if (mHelper = null) mHelper = DataAbilityHelper.creator(getContext(); FileDescriptor filedesc = null; try filedesc = mHelper.openFile(uri, r); catch (DataAbilityRemoteException | FileNotFoundException e) e.getMessage(); ImageSource.DecodingOptions decodingOpts = new ImageSource.DecodingOptions(); decodingOpts.desiredSize = new Size(Util.getScreenWidth(this), Util.getScreenHeight(this); ImageSource imageSource = ImageSource.create(filedesc, null); PixelMap pixel