因为需要在没有网络的情况下让项目编译通过，并打包
尝试将C:\users\[username]目录下

C:\users[username]目录下

No cached version of [xxx.xxxx:xxxx] available for offline mode

经过多次尝试，用缓存的方式能成功主要看运气，也不知道为啥；

以下方法经过多台电脑测试，贼稳

对于离线模式，官方已经给出Offline components来方便项目的编译
Offline components下载地址
进入地址，找到这个

下载后文件名offline-gmaven-stable.zip

按照offline-gmaven-stable.zip中README说明的方法
因为版本不同步骤可能不一样，请参照对应说明的具体步骤操作

1.配置离线组件
在.android目录下创建manual-offline-m2文件夹，将
offline-gmaven-stable.zip在此目录下解压.

Windows：C:\Users\[user_name]\.android\manual-offline-m2\gmaven_stable
Mac/Linux：~/.android/manual-offline-m2/gmaven_stable

2.配置离线文件
在.gradle目录下新建init.d文件夹，并新建offline.gradle.

Windows：C:\Users\[user_name]\.gradle\init.d\offline.gradle
Mac/Linux：~/.gradle/init.d/offline.gradle

offline.gradle内容：

def reposDir = new File("C:\\Users\\[user_name]", ".android\\manual-offline-m2")
    def repos = new ArrayList()
    reposDir.eachDir {repos.add(it) }
    repos.sort()

    allprojects {
      buildscript {
        repositories {
          for (repo in repos) {
            maven {
              name = "injected_offline_${repo.name}"
              url = repo.toURI().toURL()
            }
          }
        }
      }
      repositories {
        for (repo in repos) {
          maven {
            name = "injected_offline_${repo.name}"
            url = repo.toURI().toURL()
          }
        }
      }
    }

将offline.gradle中的路径改为自己电脑的离线组件路径
3.依赖库缓存文件路径转换

外网依赖库缓存目录:C:\Users\[user_name]\.gradle\caches\modules-2\files-2.1

依赖库缓存目录

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.LinkedList;


public class CopyTool {
    //来源jar包文件夹
    public final static String path = "D:\\Users\\aaa\\.gradle\\caches\\modules-2\\files-2.1";
    //目的jar包文件夹
    public final static String stopName = "files-2.1";

    public static void main(String[] args) {
        System.out.println("Begin to copy");
        processDotForld();
        copyToLastForld();
        System.out.println("Copy finished");
    }

    /**
     * 处理文件夹中带点好的。；例如：D:/test/com.ifind.android/
     */
    public static void processDotForld() {
        File file = new File(path);
        if (file.exists()) {
            LinkedList<File> list = new LinkedList<>();
            File[] files = file.listFiles();
            for (int i = 0; i < files.length; i++) {
                File file2 = files[i];
                if (file2.isDirectory()) {
                    //文件夹
                    File desFile = creatforld(file2);
                    copyFileToDes(file2, desFile);
                } else {
                    //文件//目前不存在
                }
            }
        }
    }

    /**
     * 文件夹拷贝
     *
     * @param source
     * @param des
     */
    public static void copyFileToDes(File source, File des) {
        try {
            copyDir(source.getPath(), des.getPath());
        } catch (Exception e) {
            // TODO: handle exception
        }
    }

    /**
     * 文件夹拷贝
     *
     * @param sourcePath
     * @param newPath
     * @throws IOException
     */
    public static void copyDir(String sourcePath, String newPath) throws IOException {
        File file = new File(sourcePath);
        String[] filePath = file.list();

        if (!(new File(newPath)).exists()) {
            (new File(newPath)).mkdir();
        }

        for (int i = 0; i < filePath.length; i++) {
            if ((new File(sourcePath + file.separator + filePath[i])).isDirectory()) {
                copyDir(sourcePath + file.separator + filePath[i], newPath + file.separator + filePath[i]);
            }
            if (new File(sourcePath + file.separator + filePath[i]).isFile()) {
                copyFile(sourcePath + file.separator + filePath[i], newPath + file.separator + filePath[i]);
            }
        }
    }

    public static void copyFile(String oldPath, String newPath) throws IOException {
        File oldFile = new File(oldPath);
        File file = new File(newPath);
        FileInputStream in = new FileInputStream(oldFile);
        FileOutputStream out = new FileOutputStream(file);

        byte[] buffer = new byte[2097152];

        //while((in.read(buffer)) != -1){
        //  out.write(buffer);
        //}

        DataInputStream dis = new DataInputStream(new BufferedInputStream(in));
        DataOutputStream dos = new DataOutputStream(new BufferedOutputStream(out));

        int length;
        while ((length = dis.read(buffer)) != -1) {
            dos.write(buffer, 0, length);
        }
        dos.flush();
        dos.close();
        dis.close();
    }

    /**
     * 创建文件夹
     *
     * @param file
     */
    public static File creatforld(File file) {
        String path = file.getAbsolutePath();
        if (path != null) {
            String temp = "files-2.1";
            temp = stopName;
            String temS[] = path.split(temp);

            if (temS != null && temS.length == 2) {
                String firstName = temS[0];
                String dotName = temS[1];
                if (dotName != null) {
                    String[] lasts = dotName.split("\\.");
                    int count = lasts.length;
                    if (count < 2) {
                        return null;
                    }
                    String pathNew = firstName + temp;
                    for (int i = 0; i < count; i++) {
                        if (i == 0) {
                            pathNew = pathNew + lasts[i];
                        } else {
                            pathNew = pathNew + "\\" + lasts[i];
                        }
                    }
                    if (pathNew != null && !pathNew.equals("")) {
                        File fileForld = new File(pathNew);
                        if (!fileForld.exists()) {
                            fileForld.mkdirs();
                        }
                        return fileForld;
                    }
                }
            }
        }
        return null;
    }

    public static ArrayList<File> getFile(File file) {
        ArrayList<File> list = new ArrayList<>();
        if (file.isDirectory()) {
            File[] filesTemp = file.listFiles();
            for (int i = 0; i < filesTemp.length; i++) {
                ArrayList<File> result = getFile(filesTemp[i]);
                list.addAll(result);
            }

        } else {
            list.add(file);
        }
        return list;
    }

    // 创建目录
    public static boolean createDir(String destDirName) {
        File dir = new File(destDirName);
        if (dir.exists()) {// 判断目录是否存在
            System.out.println("创建目录失败，目标目录已存在！");
            return false;
        }
        if (!destDirName.endsWith(File.separator)) {// 结尾是否以"/"结束
            destDirName = destDirName + File.separator;
        }
        if (dir.mkdirs()) {// 创建目标目录
            System.out.println("创建目录成功！" + destDirName);
            return true;
        } else {
            System.out.println("创建目录失败！");
            return false;
        }
    }

    public static void copyToLastForld() {
        File file = new File(path);
        if (file.exists()) {
            LinkedList<File> list = new LinkedList<>();
            File[] files = file.listFiles();
            for (int i = 0; i < files.length; i++) {
                File file2 = files[i];
                if (file2.isDirectory()) {
                    //文件夹
                    proceessForld(file2);
                } else {
                    //文件//目前不存在
                }
            }
        }
    }

    private static void proceessForld(File file) {
        File[] files = file.listFiles();
        for (int i = 0; i < files.length; i++) {
            File file2 = files[i];
            if (file2.isDirectory()) {
                //文件夹
                proceessForld(file2);
            } else {
                //文件//目前不存在//判断是否进行拷贝
                try {
                    proceessFile(file2);
                } catch (FileNotFoundException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }

    private static void proceessFile(File file) throws FileNotFoundException {
        if (file != null) {
            String path = file.getAbsolutePath();
            if (path != null) {
                String[] lasts = splitString(path);
                if (lasts != null && lasts.length > 0) {
                    int count = lasts.length;
                    String last = lasts[count - 1];
                    String last2 = lasts[count - 2];

                    if (last2 != null && last2.length() > 20) {
                        //拷贝到上一级目录
                        String des = null;
                        if (count < 2) {
                            return;
                        }
                        for (int i = 0; i < count - 2; i++) {
                            if (i == 0) {
                                des = lasts[i];
                            } else {
                                des = des + "\\\\" + lasts[i];
                            }
                        }
                        des = des + "\\\\" + last;
                        String strParentDirectory = file.getParent();
                        File parentFile = new File(strParentDirectory);
                        strParentDirectory = parentFile.getParent() + "\\" + last;
                        copy(file, path, strParentDirectory);
                    } else {
                        // System.out.println("source = "+path);
                    }
                    // System.out.println("source = "+path);
                    // System.out.println("des = "+des);
                }
            }
        }
    }

    private static String[] splitString(String path) {
        String[] lasts = null;
        lasts = path.split("\\\\");
        int count = lasts.length;
        boolean isFirst = true;
        for (int i = 0; i < count; i++) {
            String str = lasts[i];
            if (str != null && str.contains(".")) {
                if (isFirst) {
                    isFirst = false;
                    System.out.println("\n\n\n\n");
                    System.out.println("path=" + path + "");
                }
                System.out.println("str=" + str + "");
            }
        }
        return lasts;
    }

    /**
     * copy动作
     *
     * @param file
     * @param source
     * @param des
     * @throws FileNotFoundException
     */
    private static void copy(File file, String source, String des) throws FileNotFoundException {
        if (file != null) {
            FileInputStream fis = null;
            FileOutputStream fot = null;
            byte[] bytes = new byte[1024];
            int temp = 0;
            File desFile = new File(des);
            if (desFile.exists()) {
                return;
            }
            try {
                fis = new FileInputStream(file);
                fot = new FileOutputStream(desFile);
                while ((temp = fis.read(bytes)) != -1) {
                    fot.write(bytes, 0, temp);
                    fot.flush();
                }
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                if (fis != null) {
                    try {
                        fis.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (fot != null) {
                    try {
                        fot.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        }
    }

    private static String getContent(String content) {
        String str = content;
        if (content != null && content.length() > 4) {
            str = content.substring(0, 4);
        }
        return str;
    }
}

a.将工具类中“来源jar包文件夹”路径改为自己的依赖库缓存目录；

改这里！！

b.运行工具类；
c.将缓存目录下生成的所有一级目录文件夹复制到\manual-offline-m2\gmaven_stable中，同名文件夹合并处理；

就酱

如果依然是No cached version of [xxx.xxxx:xxxx] available for offline mode
就把google(),jcenter()注释掉，试试！

buildscript {
    repositories {
        // Hide these repositories to test your build against
        // the offline components. You can include them again after
        // you’ve confirmed that your project builds ‘offline’.
        // google()
        // jcenter()
    }
    …
}
allprojects {
    repositories {
        // google()
        // jcenter()
    }
    ...
}

这样离线环境配置完成；

接下来就是熟悉的操作了：

1.打开Android Studio；
2.设置Studio为离线模式，设置.gradle路径；

2.设置SDK路径；
3.导入项目；

摆个帅气的姿势

点我