Android - 避免保存到 storage/emulated/0

Question

我正在尝试使用以下代码将图像保存在公共存储目录中。但是，当这是保存到 storage/emulated/0 而不是公共图片文件夹时。我基本上在另一个应用程序中使用了这个确切的代码，它工作得很好。有谁知道为什么 .getExternalStoragePublic 目录没有返回可访问的 /Pictures/ 而是返回 storage/emulated/0 ？

我的清单文件中有“uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE”

File backupFile;
File appFolder;
String path= Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getAbsolutePath() + "/CustomFolder";
appFolder = new File(path);
if (!appFolder.exists())
    appFolder.mkdir();
String fileName = "picture.jpg"
backupFile = new File(appFolder, fileName);
FileOutputStream output = null;
try {
    output = new FileOutputStream(backupFile);
    output.write(bytes);
} catch (IOException e) {
    e.printStackTrace();
} finally {
    mImage.close();
    if (null != output) {
        try {
            output.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Answer 1

没关系，我想通了。事实证明，在 Manifest 文件中仅包含“uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" 是不够的，我必须在它之前放置以下代码才能使其工作：

    int CAMERA_PERMISSION_REQUEST_CODE = 2;
    int result = ContextCompat.checkSelfPermission(getActivity().getApplicationContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE);
    if (result != PackageManager.PERMISSION_GRANTED){
        if (ActivityCompat.shouldShowRequestPermissionRationale(getActivity(), Manifest.permission.WRITE_EXTERNAL_STORAGE)){
            Toast.makeText(getActivity().getApplicationContext(), "External Storage permission needed. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show();
        } else {
            ActivityCompat.requestPermissions(getActivity(),new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},CAMERA_PERMISSION_REQUEST_CODE);
        }
    }