//To delete all the files of a specific folder & subfolder
public static void deleteFiles(File directory, Context c) {
    try {
        for (File file : directory.listFiles()) {
            if (file.isFile()) {
                final ContentResolver contentResolver = c.getContentResolver();
                String canonicalPath;
                try {
                    canonicalPath = file.getCanonicalPath();
                } catch (IOException e) {
                    canonicalPath = file.getAbsolutePath();
                }
                final Uri uri = MediaStore.Files.getContentUri("external");
                final int result = contentResolver.delete(uri,
                        MediaStore.Files.FileColumns.DATA + "=?", new String[]{canonicalPath});
                if (result == 0) {
                    final String absolutePath = file.getAbsolutePath();
                    if (!absolutePath.equals(canonicalPath)) {
                        contentResolver.delete(uri,
                                MediaStore.Files.FileColumns.DATA + "=?", new String[]{absolutePath});
                    }
                }
                if (file.exists()) {
                    file.delete();
                    if (file.exists()) {
                        try {
                            file.getCanonicalFile().delete();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                        if (file.exists()) {
                            c.deleteFile(file.getName());
                        }
                    }
                }
            } else
                deleteFiles(file, c);
        }
    } catch (Exception e) {
    }
}

这是你的解决方案，它也将刷新画廊以及。

private static void deleteRecursive(File dir)
{
    //Log.d("DeleteRecursive", "DELETEPREVIOUS TOP" + dir.getPath());
    if (dir.isDirectory())
    {
        String[] children = dir.list();
        for (int i = 0; i < children.length; i++)
        {
            File temp = new File(dir, children[i]);
            deleteRecursive(temp);
        }

    }

    if (dir.delete() == false)
    {
        Log.d("DeleteRecursive", "DELETE FAIL");
    }
}

我们可以使用命令行参数删除整个文件夹及其内容。

public static void deleteFiles(String path) {

    File file = new File(path);

    if (file.exists()) {
        String deleteCmd = "rm -r " + path;
        Runtime runtime = Runtime.getRuntime();
        try {
            runtime.exec(deleteCmd);
        } catch (IOException e) { }
    }
}

以上代码的使用示例:

deleteFiles("/sdcard/uploads/");

我把这一个虽然它的步伐，它删除文件夹与任何目录结构。

public int removeDirectory(final File folder) {

    if(folder.isDirectory() == true) {
        File[] folderContents = folder.listFiles();
        int deletedFiles = 0;

        if(folderContents.length == 0) {
            if(folder.delete()) {
                deletedFiles++;
                return deletedFiles;
            }
        }
        else if(folderContents.length > 0) {

            do {

                File lastFolder = folder;
                File[] lastFolderContents = lastFolder.listFiles();

                //This while loop finds the deepest path that does not contain any other folders
                do {

                    for(File file : lastFolderContents) {

                        if(file.isDirectory()) {
                            lastFolder = file;
                            lastFolderContents = file.listFiles();
                            break;
                        }
                        else {

                            if(file.delete()) {
                                deletedFiles++;
                            }
                            else {
                                break;
                            }

                        }//End if(file.isDirectory())

                    }//End for(File file : folderContents)

                } while(lastFolder.delete() == false);

                deletedFiles++;
                if(folder.exists() == false) {return deletedFiles;}

            } while(folder.exists());
        }
    }
    else {
        return -1;
    }

    return 0;

}

希望这能有所帮助。

这是另一种(现代)解决方法。

public class FileUtils {
    public static void delete(File fileOrDirectory) {
        if(fileOrDirectory != null && fileOrDirectory.exists()) {
            if(fileOrDirectory.isDirectory() && fileOrDirectory.listFiles() != null) {      
                Arrays.stream(fileOrDirectory.listFiles())
                      .forEach(FileUtils::delete);
            }
            fileOrDirectory.delete();
        }
    }
}

从API 26开始在Android上运行

public class FileUtils {

    public static void delete(File fileOrDirectory)  {
        if(fileOrDirectory != null) {
            delete(fileOrDirectory.toPath());
        }
    }

    public static void delete(Path path)  {
        try {
            if(Files.exists(path)) {
                Files.walk(path)
                        .sorted(Comparator.reverseOrder())
                        .map(Path::toFile)
//                      .peek(System.out::println)
                        .forEach(File::delete);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

从目录中删除所有文件的简单方法:

它是一个通用函数，用于删除目录中的所有图像

deleteAllImageFile(背景);

public static void deleteAllFile(Context context) {
File directory = context.getExternalFilesDir(null);
        if (directory.isDirectory()) {
            for (String fileName: file.list()) {
                new File(file,fileName).delete();
            }
        }    
    }