我需要在根目录下创建CAT_IMG文件夹，并在列表视图中检索它。但CAT_IMG文件夹不在根目录中创建。我在清单文件中添加了权限。请帮我在根目录下创建一个文件夹。如何在根目录下创建一个文件夹Android

private void createDirectoryAndSaveFile(Bitmap imageToSave) {

File direct = new File(getApplicationContext().getFilesDir() + "/CAT_IMG");

String timeStamp = new SimpleDateFormat("ddMMyyyy_HHmmss").format(new Date());

String fileName = "fav" + timeStamp + ".JPG";

if (!direct.exists()) {

File wallpaperDirectory = new File("/CAT_IMG");

wallpaperDirectory.mkdir();

}

File file = new File(new File("/CAT_IMG"), fileName);

if (file.exists()) {

file.delete();

}

try {

FileOutputStream out = new FileOutputStream(file);

imageToSave.compress(Bitmap.CompressFormat.JPEG, 100, out);

out.flush();

out.close();

} catch (Exception e) {

e.printStackTrace();

}

}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

if (requestCode == 1 && resultCode == Activity.RESULT_OK) {

Bitmap photo = (Bitmap) data.getExtras().get("data");

createDirectoryAndSaveFile(photo);

Log.e("URI", data.getExtras().get("data") + "");

}

}

代码检索它在列表视图：

private void getImages() {

String[] filenames = new String[0];

File path = new File(getApplicationContext().getFilesDir() + "/CAT_IMG");// add here your folder name

if (path.exists()) {

filenames = path.list();

}

for (int i = 0; i < filenames.length; i++) {

photos.add(path.getPath() + "/" + filenames[i]);

Log.e("FAV_Images", photos.get(i));

Name.add(filenames[i]);

//Sno.add(i); }

}

}

2017-08-29

shwettha

+0

我不认为你可以在根目录下创建一个目录。没有权限。 –

+0

可以在根目录下创建文件夹 –

+0

您无法从SDK应用程序写入内部存储根目录。 –