Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2017 Florian Dreier
 *
 * This file is part of MyTargets.
 *
 * MyTargets is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * MyTargets is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

import android.content.Context;

import android.support.annotation.Nullable;

import java.io.Closeable;
import java.io.File;

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

import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class Main {
    private static File unzip(Context context, InputStream in) throws IOException {
        File tmpDb = null;
        int dbFiles = 0;
        try {
            tmpDb = File.createTempFile("import", ".db");

            ZipInputStream zin = new ZipInputStream(in);
            ZipEntry sourceEntry;
            while (true) {

                sourceEntry = zin.getNextEntry();

                if (sourceEntry == null) {
                    break;
                }

                if (sourceEntry.isDirectory()) {
                    zin.closeEntry();
                    continue;
                }

                FileOutputStream fOut;
                if (sourceEntry.getName().endsWith(".db")) {
                    // Write database to tmp file
                    fOut = new FileOutputStream(tmpDb);
                    dbFiles++;
                } else {
                    // Write all other files(images) to files dir in apps data
                    int start = sourceEntry.getName().lastIndexOf("/") + 1;
                    String name = sourceEntry.getName().substring(start);
                    fOut = context.openFileOutput(name, Context.MODE_PRIVATE);
                }

                final OutputStream targetStream = fOut;
                try {
                    int read;
                    while (true) {
                        byte[] buffer = new byte[1024];
                        read = zin.read(buffer);
                        if (read == -1) {
                            break;
                        }
                        targetStream.write(buffer, 0, read);
                    }
                    targetStream.flush();
                } finally {
                    safeCloseClosable(targetStream);
                }
                zin.closeEntry();
            }
        } finally {
            safeCloseClosable(in);
        }
        if (dbFiles != 1) {
            throw new IllegalStateException("Input file is not a valid backup");
        }
        return tmpDb;
    }

    private static void safeCloseClosable(@Nullable Closeable closeable) {
        try {
            if (closeable != null) {
                closeable.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}