Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright 2014 Zhenguo Jin
 * <p/>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import android.text.TextUtils;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

public class Main {
    public static final long GB = 1073741824;
    public static final long MB = 1048576;
    public static final long KB = 1024;

    public static String getFileSize(File file) {
        FileInputStream fis = null;
        try {
            fis = new FileInputStream(file);
            int length = fis.available();
            if (length >= GB) {
                return String.format("%.2f GB", length * 1.0 / GB);
            } else if (length >= MB) {
                return String.format("%.2f MB", length * 1.0 / MB);
            } else {
                return String.format("%.2f KB", length * 1.0 / KB);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (fis != null) {
                    fis.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return "0";
    }

    public static long getFileSize(String path) {
        if (TextUtils.isEmpty(path)) {
            return -1;
        }

        File file = new File(path);
        return (file.exists() && file.isFile() ? file.length() : -1);
    }
}