A React Native module that can process local images. Support both Android and iOS.
- Get Image's RGBA data(array)
- Binary Image
- 获取图片的RGBA值（数组）
- 把图片转换成2值图
- 画像のRGBAデータを取得（配列）
- 元画像から、2値化画像を生成
Install the package:
- 😻 React Native >= 0.40
npm i --save react-native-image-tool react-native link react-native-image-tool If a java undefined error occured, add
compile project(':react-native-image-tool') into your build.gradle
If your any reason you don want to link this project using 'react-native link', go to settings.gradle and add
include ':react-native-image-tool' project(':react-native-image-tool').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-image-tool/android') then go the file that you build the ReactInstance and add the packager to it.
ReactInstanceManager.Builder builder = ReactInstanceManager.builder() .setApplication(application) .setDefaultHardwareBackBtnHandler(application.getGAMActivity()) .setInitialLifecycleState(LifecycleState.RESUMED) .setCurrentActivity((Activity) application.getGAMActivity()) .addPackage(new ImageToolsPackage()) <------- (Add this package on the Builder list) import ImageTools from 'react-native-image-tool'; ImageTools.createBinaryImage(imageUri, type, threshold, compressFormat, quality, false, frontColorString="000000ff", backColorString="ffffffff").then((response) => { // response.uri is the URI of the new image that can now be displayed, uploaded... // response.path is the path of the new image // response.name is the name of the new image with the extension // response.size is the size of the new image // while bOutputBase64 is true, response.base64 is the base64 string of the new image }).catch((err) => { // Oops, something went wrong. Check that the filename is correct and // inspect err to get more details. }); ImageTools.GetImageRGBAs(imageUri).then((response) => { // response.width is the URI of the new image that can now be displayed, uploaded... // response.height is the path of the new image // response.rgba is a array of image RGBA(R:bit0-7, G:bit8-15, B:bit16-23, A:bit24-32) }).catch((err) => { // Oops, something went wrong. Check that the filename is correct and // inspect err to get more details. });promise createBinaryImage(path, type, threshold, compressFormat, quality, frontColorString="000000ff", backColorString="ffffffff")
The promise resolves with an object containing: path, uri, name and size of the new file. The URI can be used directly as the source of an <Image> component.
| Option | Description |
|---|---|
| path | Path of image file, or a base64 encoded image string prefixed with 'data:image/imagetype' where imagetype is jpeg or png. |
| type | Only support 1 Now |
| threshold | 0-255 |
| compressFormat | Can be either JPEG, PNG or WEBP (android only). |
| quality | A number between 0 and 100. Used for the JPEG compression. |
| bOutputBase64 | Boolean. Set output format as base64(true) or template file(false). |
| frontColorString | A 32bit hex formatted string with RGBA(R:bit0-7, G:bit8-15, B:bit16-23, A:bit24-32). |
| backColorString | A 32bit hex formatted string with RGBA(R:bit0-7, G:bit8-15, B:bit16-23, A:bit24-32). |
The promise resolves with an object containing: width, height and rgba. rgba is a array of RGBA data.
| Option | Description |
|---|---|
| path | Path of image file, or a base64 encoded image string prefixed with 'data:image/imagetype' where imagetype is jpeg or png. |