public class FileUtis {
    public static final File externalStorageDirectory = Environment.getExternalStorageDirectory();
    public static String packageFilesDirectory = null;
    public static String storagePath = null;
    private static String mDefaultFolder = "libCGE";

    public FileUtis() {
    }

    public static void setDefaultFolder(String defaultFolder) {
 
        mDefaultFolder = defaultFolder;
    }

    public static String getPath() {
        return getPath((Context)null);
    }

    public static String getPath(Context context) {
        if (storagePath == null) {
            storagePath = externalStorageDirectory.getAbsolutePath() + "/" + mDefaultFolder;
            File file = new File(storagePath);
 
            if (!file.exists() && !file.mkdirs()) {
                storagePath = getPathInPackage(context, true);
            }
        }

        return storagePath;
    }

    public static String getPathInPackage(Context context, boolean grantPermissions) {
        if (context != null && packageFilesDirectory == null) {
 
            String path = context.getFilesDir() + "/" + mDefaultFolder;
            File file = new File(path);
            if (!file.exists()) {
                if (!file.mkdirs()) {
                    Log.e("libCGE_java", "在pakage目錄建立CGE臨時目錄失敗!");
                    return null;
                }

                if (grantPermissions) {
                    if (file.setExecutable(true, false)) {
                        Log.i("libCGE_java", "Package folder is executable");
                    }

                    if (file.setReadable(true, false)) {
                        Log.i("libCGE_java", "Package folder is readable");
                    }

                    if (file.setWritable(true, false)) {
                        Log.i("libCGE_java", "Package folder is writable");
                    }
                }
            }

            packageFilesDirectory = path;
            return packageFilesDirectory;
        } else {
            return packageFilesDirectory;
        }
    }

//將內容儲存在某個檔案裡面
    public static void saveTextContent(String text, String filename) {
        Log.i("libCGE_java", "Saving text : " + filename);

        try {
            FileOutputStream fileout = new FileOutputStream(filename);
            fileout.write(text.getBytes());
            fileout.flush();
            fileout.close();
        } catch (Exception var3) {
            Log.e("libCGE_java", "Error: " + var3.getMessage());
        }

    }

     //獲得某個問價裡面的內容
    public static String getTextContent(String filename) {
        Log.i("libCGE_java", "Reading text : " + filename);
        if (filename == null) {
            return null;
        } else {
            String content = "";
            byte[] buffer = new byte[256];

            try {
                FileInputStream filein = new FileInputStream(filename);

                while(true) {
                    int len = filein.read(buffer);
                    if (len <= 0) {
                        return content;
                    }

                    content = content + new String(buffer, 0, len);
                }
            } catch (Exception var5) {
                Log.e("libCGE_java", "Error: " + var5.getMessage());
                return null;
            }
        }
    }

   //將Assets目錄下的檔案拷貝到指定目錄
    public static boolean copyAssetsFile(AssetManager assetManager, String src, String dst) {
        if ((new File(dst)).exists()) {
            return false;
        } else {
            try {
                FileOutputStream outputStream = new FileOutputStream(dst);
                InputStream inputStream = assetManager.open(src);
                byte[] buffer = new byte[1024];

                int count;
                while((count = inputStream.read(buffer)) != -1) {
                    outputStream.write(buffer, 0, count);
                }

                inputStream.close();
                outputStream.close();
                return true;
            } catch (FileNotFoundException var7) {
                var7.printStackTrace();
                Log.d("camera", "copy assets file failed:" + var7.getMessage());
                return false;
            } catch (IOException var8) {
                Log.d("camera", "copy assets file failed:" + var8.getMessage());
                var8.printStackTrace();
                return false;
            }
        }
    }

　　

    //會在該應用下建立某個目錄  /storage/emulated/0/Android/data/com.example.myapplication(應用)/file

    public static String rootPath(Context context) {
        File file = context.getExternalFilesDir((String)null);
        if (file == null) {
            file = context.getFilesDir();   通過修改這個引數可以改變建立目錄的名稱
        }

        return file.getAbsolutePath();
    }

   //把資料把存到指定目錄
    public static void saveDataToFile(String path, byte[] data) {
        try {
            try {
                File file = new File(path);
                File parent = file.getParentFile();
                if (parent != null && !parent.exists()) {
                    parent.mkdirs();
                }

                if (file.exists()) {
                    file.delete();
                }

                if (!file.exists()) {
                    boolean isok = file.createNewFile();
                    if (isok) {
                        FileOutputStream fos = new FileOutputStream(file);
                        BufferedOutputStream bos = new BufferedOutputStream(fos);
                        bos.write(data);
                        if (bos != null) {
                            bos.flush();
                            bos.close();
                        }
                    }
                }
            } catch (Exception var10) {
                var10.printStackTrace();
            }

        } finally {
            ;
        }
    }


　　//讀取某個檔案裡面的內容
    public static byte[] readDataFromFile(String path) {
        File file = new File(path);
        BufferedInputStream bis = null;
        FileInputStream fis = null;

        try {
            fis = new FileInputStream(file);
            bis = new BufferedInputStream(fis);
            byte[] bytes = new byte[(int)file.length()];
            bis.read(bytes);
            if (bis != null) {
                bis.close();
            }

            return bytes;
        } catch (Exception var5) {
            var5.printStackTrace();
            return null;
        }
    }

　　//刪除某個目錄
    public static void deleteDir(String pPath) {
        File dir = new File(pPath);
        if (dir.exists() && dir.isFile()) {
            dir.delete();
        }

        deleteDirWihtFile(dir);
    }

　　//刪除某個目錄的下的檔案
    public static void deleteDirWihtFile(File dir) {
        if (dir != null && dir.exists() && dir.isDirectory()) {
            File[] var1 = dir.listFiles();
            int var2 = var1.length;

            for(int var3 = 0; var3 < var2; ++var3) {
                File file = var1[var3];
                if (file.isFile()) {
                    file.delete();
                } else if (file.isDirectory()) {
                    deleteDirWihtFile(file);
                }
            }

            dir.delete();
        }
    }
}