Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.io.BufferedInputStream;

import java.io.File;

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

import java.net.URL;
import java.net.URLConnection;

import android.util.Log;

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

    public static File getFileFromCacheOrURL(File cacheDir, URL url) throws IOException {
        Log.i(TAG, "getFileFromCacheOrURL(): url = " + url.toExternalForm());

        String filename = url.getFile();
        int lastSlashPos = filename.lastIndexOf('/');
        String fileNameNoPath = new String(lastSlashPos == -1 ? filename : filename.substring(lastSlashPos + 1));

        File file = new File(cacheDir, fileNameNoPath);

        if (file.exists()) {
            if (file.length() > 0) {
                Log.i(TAG, "File exists in cache as: " + file.getAbsolutePath());
                return file;
            } else {
                Log.i(TAG, "Deleting zero length file " + file.getAbsolutePath());
                file.delete();
            }
        }

        Log.i(TAG, "File " + file.getAbsolutePath() + " does not exists.");

        URLConnection ucon = url.openConnection();
        ucon.setReadTimeout(5000);
        ucon.setConnectTimeout(30000);

        InputStream is = ucon.getInputStream();
        BufferedInputStream inStream = new BufferedInputStream(is, 1024 * 5);
        FileOutputStream outStream = new FileOutputStream(file);
        byte[] buff = new byte[5 * 1024];

        // Read bytes (and store them) until there is nothing more to read(-1)
        int len;
        while ((len = inStream.read(buff)) != -1) {
            outStream.write(buff, 0, len);
        }

        // Clean up
        outStream.flush();
        outStream.close();
        inStream.close();
        return file;
    }
}