Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.io.File;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;

import java.io.IOException;
import java.io.InputStream;

import java.security.MessageDigest;
import java.util.ArrayList;

import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

import android.util.Log;

public class Main {
    private static final String TAG = "NarUtil";

    private static void extractZipToPath(ArrayList<ZipEntry> entries, ZipFile nar, String targetPath)
            throws IOException {
        extractZipToPath(entries, nar, targetPath, false);
    }

    private static void extractZipToPath(ArrayList<ZipEntry> entries, ZipFile nar, String targetPath, boolean strip)
            throws IOException {
        Log.d(TAG, " =>extracting to" + targetPath);
        checkAndMakeDir(targetPath);
        for (ZipEntry e : entries) {
            if (e.isDirectory()) {
                //checkAndMakeDir(targetPath + e.getName());
            } else {
                extractFileToPath(nar, targetPath, e, false, strip);
            }
        }
    }

    private static void checkAndMakeDir(String dir) {
        File f = new File(dir);
        if (f.isDirectory() == false) {
            Log.d(TAG, " ->creating dir:" + dir);
            if (f.mkdirs() == false)
                Log.d(TAG, "failed to create dir");
        }
    }

    private static void extractFileToPath(ZipFile nar, String targetPath, ZipEntry e, boolean ignorename,
            boolean strip) throws FileNotFoundException, IOException {
        File f = null;
        if (ignorename)
            f = new File(targetPath);
        else {

            f = new File(targetPath + "/" + (strip ? stripExtraLevel(e.getName()) : e.getName()));
        }
        File fP = f.getParentFile();
        if (fP != null && fP.exists() == false) {
            boolean s = fP.mkdirs();
            Log.d(TAG, "fp make" + s);
        }
        FileOutputStream os = new FileOutputStream(f);
        InputStream is = nar.getInputStream(e);
        copyFile(is, os);
    }

    private static String stripExtraLevel(String inPath) {
        Log.d(TAG, "inPath is:" + inPath);
        // find first '/' in the path and return substring
        int firstSlashIndex = inPath.indexOf('/');
        if (firstSlashIndex > 0) {
            return inPath.substring(firstSlashIndex + 1);
        }
        return inPath;
    }

    public static byte[] copyFile(InputStream is, FileOutputStream os) throws IOException {
        MessageDigest digester = null;
        try {
            digester = MessageDigest.getInstance("MD5");

            byte[] buffer = new byte[16 * 1024];
            int length;
            while ((length = is.read(buffer)) > 0) {
                os.write(buffer, 0, length);
                digester.update(buffer, 0, length);
            }
            os.flush();
            os.close();

            //os.getFD().sync();
            //Log.d(TAG, "done copying");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            is.close();
            Log.d(TAG, "done copying");
        }
        if (digester != null) {
            byte[] digest = digester.digest();
            return digest;
        }

        return null;
    }
}