A simple binary file reader for react-native. It uses RandomAccessFile and FileHandle.
$npm i react-native-binary-file
Or
$ yarn add react-native-binary-file
$ react-native link react-native-binary-file
You can add and install use react-native install
$ react-native install react-native-binary-file
Create a briding header with:
//
// Use this file to import your target's public headers that you would like to expose to Swift.
//
#import <React/RCTBridgeModule.h>
- In XCode, in the project navigator, right click
Libraries➜Add Files to [your project's name] - Go to
node_modules➜react-native-binary-fileand addRNBinaryFile.xcodeproj - In XCode, in the project navigator, select your project. Add
libRNBinaryFile.ato your project'sBuild Phases➜Link Binary With Libraries - Run your project (
Cmd+R)<
-
Open up
android/app/src/main/java/[...]/MainActivity.java -
Add
import com.reactlibrary.RNBinaryFilePackage;to the imports at the top of the file -
Add
new RNBinaryFilePackage()to the list returned by thegetPackages()method -
Setup gradle
Append the following lines to android/settings.gradle:
include ':react-native-binary-file'
project(':react-native-binary-file').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-binary-file/android')Insert the following lines inside the dependencies block in android/app/build.gradle:
compile project(':react-native-binary-file')class BinaryFile {
open(filename: string): Promise<number>;
close(fd: number): Promise<void>;
seek(fd: number, pos: number): Promise<void>;
read(fd: number, len: number): Promise<Uint8Array>;
readByte(fd: number): Promise<number>;
readInt32(fd: number): Promise<number>;
readInt64(fd: number): Promise<number>;
readFloat32(fd: number): Promise<number>;
readFloat64(fd: number): Promise<number>;
}import { BinaryFile } from 'react-native-binary-file';
// Open a file for reading
const fd = await BinaryFile.open('path-to-file');
// Read a byte
const byteValue = await BinaryFile.readByte(fd);
// Read a next integer (int32) - big endian
const intValue = await BinaryFile.readInt32(fd);
// Read a next integer (int64) - big endian
const intValue = await BinaryFile.readInt64(fd);
// Seek to 1024
await BinaryFile.seek(fd, 1024);
// Read 512 bytes (uint8[])
const buffer = await BinaryFile.read(fd, 512);
// Close the file
await BinaryFile.close(fd);
// Another file
const fd2 = await BinaryFile.open('path-to-file-2');
// ...
await BinaryFile.close(fd2);
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