FileUtil.java

/*
 * Copyright 2017 GcsSloop
 *
 * 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
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.
 *
 * Last modified 2017-03-08 01:01:18
 *
 * GitHub:  https://github.com/GcsSloop
 * Website: http://www.gcssloop.com
 * Weibo:   http://weibo.com/GcsSloop
 */

package com.gcssloop.diycode.utils;

import android.content.Context;
import android.os.Environment;

import java.io.File;

public class FileUtil {
    private FileUtil() {
    }

//****系统文件目录**********************************************************************************************

    /**
     * @return 程序系统文件目录
     */
    public static String getFileDir(Context context) {
        return String.valueOf(context.getFilesDir());
    }

    /**
     * @param context    上下文
     * @param customPath 自定义路径
     * @return 程序系统文件目录绝对路径
     */
    public static String getFileDir(Context context, String customPath) {
        String path = context.getFilesDir() + formatPath(customPath);
        mkdir(path);
        return path;
    }

//****系统缓存目录**********************************************************************************************

    /**
     * @return 程序系统缓存目录
     */
    public static String getCacheDir(Context context) {
        return String.valueOf(context.getCacheDir());
    }

    /**
     * @param context    上下文
     * @param customPath 自定义路径
     * @return 程序系统缓存目录
     */
    public static String getCacheDir(Context context, String customPath) {
        String path = context.getCacheDir() + formatPath(customPath);
        mkdir(path);
        return path;
    }

//****Sdcard文件目录**********************************************************************************************

    /**
     * @return 内存卡文件目录
     */
    public static String getExternalFileDir(Context context) {
        return String.valueOf(context.getExternalFilesDir(""));
    }

    /**
     * @param context    上下文
     * @param customPath 自定义路径
     * @return 内存卡文件目录
     */
    public static String getExternalFileDir(Context context, String customPath) {
        String path = context.getExternalFilesDir("") + formatPath(customPath);
        mkdir(path);
        return path;
    }

//****Sdcard缓存目录**********************************************************************************************

    /**
     * @return 内存卡缓存目录
     */
    public static String getExternalCacheDir(Context context) {
        return String.valueOf(context.getExternalCacheDir());
    }

    /**
     * @param context    上下文
     * @param customPath 自定义路径
     * @return 内存卡缓存目录
     */
    public static String getExternalCacheDir(Context context, String customPath) {
        String path = context.getExternalCacheDir() + formatPath(customPath);
        mkdir(path);
        return path;
    }

//****公共文件夹**********************************************************************************************

    /**
     * @return 公共下载文件夹
     */
    public static String getPublicDownloadDir() {
        return Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath();
    }

//****相关工具**********************************************************************************************

    /**
     * 创建文件夹
     *
     * @param DirPath 文件夹路径
     */
    public static void mkdir(String DirPath) {
        File file = new File(DirPath);
        if (!(file.exists() && file.isDirectory())) {
            file.mkdirs();
        }
    }

    /**
     * 格式化文件路径
     * 示例：  传入 "sloop" "/sloop" "sloop/" "/sloop/"
     * 返回 "/sloop"
     */
    private static String formatPath(String path) {
        if (!path.startsWith("/"))
            path = "/" + path;
        while (path.endsWith("/"))
            path = new String(path.toCharArray(), 0, path.length() - 1);
        return path;
    }

    /**
     * @return 存储卡是否挂载(存在)
     */
    public static boolean isMountSdcard() {
        String status = Environment.getExternalStorageState();
        return status.equals(Environment.MEDIA_MOUNTED);
    }

}