复制文件夹的工具类

这几天公司项目想拿数据库的数据，但是安卓设备没有root权限，所以自己想了个办法:直接把所有data/data/app下的所有文件全部复制下来了，然后就想看啥数据看啥数据，文件结构如下：

image.png

具体的操作如下:

1. 一个复制文件夹的工具类

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public static void copyPath(final File oldPath, final File newPath){
    if(!oldPath.isDirectory() || !newPath.isDirectory()){
        new IllegalArgumentException("File mast is Directory");
    }
    if(newPath.exists()){
        new IllegalArgumentException("newFile not is exists");
    }
    try{
        //io耗时操作，放在子线程
        new Thread(new Runnable() {
            @Override
            public void run() {
                copyFiles(oldPath,oldPath.getPath(),newPath.getPath());
            }
        }).start();
    }catch (Exception e){
        e.printStackTrace();
    }
}

public static void copyFiles(File oldFile,String oldPath,String newPath){
    File[] files = oldFile.listFiles();
    for (int i = 0; i < files.length; i++) {
        System.out.println(files[i].getPath());
        if(files[i].isDirectory()){
            createDirectory(files[i],oldPath,newPath);
            File[] fs = files[i].listFiles();
            if(fs != null && fs.length != 0){//遍历文件夹的下一层
                copyFiles(files[i],oldPath,newPath);
            }
        }else if(files[i].isFile()){
            copyFile(files[i],oldPath,newPath);
        }
    }
}

public static void copyFile(File file,String oldPath,String newPath){
    String path = file.getPath();
    String nPath = path.replace(oldPath, newPath);
    File nfile = new File(nPath);
    InputStream in = null;
    OutputStream out = null;
    try {
        in = new FileInputStream(file);
        out = new FileOutputStream(nfile);
        byte[] bs = new byte[1024];
        int len = -1;
        while((len = in.read(bs))!= -1){
            out.write(bs, 0, len);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }finally{
        try {
            if(in != null){
                in.close();
            }
            if(out != null){
                out.close();
            }
        } catch (Exception e2) {
            e2.printStackTrace();
        }
    }
}

public static void createDirectory(File dir,String oldPath,String newPath){
    String path = dir.getPath();
    String nPath = path.replace(oldPath, newPath);
    File file = new File(nPath);
    file.mkdirs();
}

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2. 然后调用就可以了

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    File f = new File(Environment.getDataDirectory().getPath()+"/data/"+this.getPackageName() + "/");
    FileUtil.copyPath(f,Environment.getExternalStorageDirectory());

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3.sql数据库结构可以参照这篇博客sqllite的数据结构