fix:reformat code and update README.md

Author: 和欣

README.md

@@ -195,8 +195,11 @@ Example
 ```js
 const sourcePath = `${DocumentDirectoryPath}/myFile.zip`
 const targetPath = DocumentDirectoryPath
+const charset = 'UTF-8' 
+// charset possible values: UTF-8, GBK, US-ASCII and so on. If none was passed, default value is UTF-8
 
-unzip(sourcePath, targetPath)
+
+unzip(sourcePath, targetPath, charset)
 .then((path) => {
   console.log(`unzip completed at ${path}`)
 })

android/src/main/java/com/rnziparchive/RNZipArchiveModule.java

@@ -102,7 +102,7 @@ public void run() {
   }
 
   @ReactMethod
-  public void unzip(final String zipFilePath, final String destDirectory,final String charset, final Promise promise) {
+  public void unzip(final String zipFilePath, final String destDirectory, final String charset, final Promise promise) {
     new Thread(new Runnable() {
       @Override
       public void run() {
@@ -125,7 +125,7 @@ public void run() {
         try {
           // Find the total uncompressed size of every file in the zip, so we can
           // get an accurate progress measurement
-          final long totalUncompressedBytes = getUncompressedSize(zipFilePath,charset);
+          final long totalUncompressedBytes = getUncompressedSize(zipFilePath, charset);
 
           File destDir = new File(destDirectory);
           if (!destDir.exists()) {
@@ -140,7 +140,7 @@ public void run() {
           final long[] extractedBytes = {0};
           final int[] lastPercentage = {0};
 
-          final ZipFile zipFile = new ZipFile(zipFilePath,Charset.forName(charset));
+          final ZipFile zipFile = new ZipFile(zipFilePath, Charset.forName(charset));
           final Enumeration<? extends ZipEntry> entries = zipFile.entries();
           Log.d(TAG, "Zip has " + zipFile.size() + " entries");
           while (entries.hasMoreElements()) {
@@ -459,10 +459,10 @@ protected void updateProgress(long extractedBytes, long totalSize, String zipFil
    *
    * @return -1 on failure
    */
-  private long getUncompressedSize(String zipFilePath,String charset) {
+  private long getUncompressedSize(String zipFilePath, String charset) {
     long totalSize = 0;
     try {
-      ZipFile zipFile = new ZipFile(zipFilePath,Charset.forName(charset));
+      ZipFile zipFile = new ZipFile(zipFilePath, Charset.forName(charset));
       Enumeration<? extends ZipEntry> entries = zipFile.entries();
       while (entries.hasMoreElements()) {
         ZipEntry entry = entries.nextElement();

index.d.ts

@@ -1,7 +1,7 @@
 declare module 'react-native-zip-archive' {
   import { NativeEventSubscription } from 'react-native';
   export function zip(source: string, target: string): Promise<string>;
-  export function unzip(source: string, target: string,charset?:string): Promise<string>;
+  export function unzip(source: string, target: string, charset?: string): Promise<string>;
   export function unzipWithPassword(assetPath: string, target: string, passowrd: string): Promise<string>;
   export function unzipAssets(assetPath: string, target: string): Promise<string>;
   export function subscribe(callback: ({ progress: number, filePath: string })): NativeEventSubscription;

index.js

@@ -39,6 +39,6 @@ export const unzipAssets = (source, target) => {
 
 export const subscribe = callback => {
   const emitter =
-      Platform.OS === 'ios' ? NativeAppEventEmitter : DeviceEventEmitter
+    Platform.OS === 'ios' ? NativeAppEventEmitter : DeviceEventEmitter
   return emitter.addListener('zipArchiveProgressEvent', callback)
 }