重命名图库中的所选图像

Question

I'm trying to make an app where user selects an Image from gallery and can rename it to desired name, The code to get the Image from gallery is

Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
            photoPickerIntent.setType("image/*");
            startActivityForResult(photoPickerIntent, RESULT_LOAD_IMG);

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (resultCode == RESULT_OK){
        try {
            upload.setVisibility(View.INVISIBLE);
            Image.setVisibility(View.VISIBLE);
            final Uri imageUri = data.getData();
            final InputStream imageStream = getContentResolver().openInputStream(imageUri);
            final Bitmap selectedImage = BitmapFactory.decodeStream(imageStream);

            Image.setImageBitmap(selectedImage);
            Log.i("FileName is", fileName);
        } catch (FileNotFoundException e){
            e.printStackTrace();
            Toast.makeText(getApplicationContext(),"Error Loading Image",Toast.LENGTH_LONG).show();
        }
    } else {
        Toast.makeText(getApplicationContext(),"Please select an image",Toast.LENGTH_LONG).show();
    }
}

I've seen some posts which use from and to to rename Images but I'm not able to understand how it works and how to set a desired name(which will be entered by user via an editText).

Any help would be appreciated

Answer 1

Here you can find your relevant solution of @Davewebb and you are confused in from to

File sdcard = Environment.getExternalStorageDirectory();
File from = new File(sdcard,"from.txt");
File to = new File(sdcard,"to.txt");
from.renameTo(to);

from.txt is your old name and new name will be here is to.txt

for internal Storage, you can read a file like this and will do the same above process

private String readFileFromInternalStorage(){
ImageView imageView = (ImageView) findViewById(R.id.image);
ContextWrapper cw = new ContextWrapper(context);

//path to /data/data/yourapp/app_data/dirName
File directory = cw.getDir("dirName", Context.MODE_PRIVATE);          
File mypath=new File(directory,"imagename.jpg");

ImageView imageView = (ImageView) findViewById(R.id.image);
    imageView.setImageDrawable(Drawable.createFromPath(mypath.toString()));
}

Answer 2

Here is the code which may help you

    File sdcard = Environment.getExternalStorageDirectory();
    File from = new File(sdcard, "from.txt");
    File to = new File(sdcard, "to.txt");
    if (updateFileName(context, from, to))
        Log.d("File Rename", "Successfully renamed");
    else Log.d("File Rename", "Rename filed");

 public static boolean updateFileName(Context mContext, File from, File to) {
        if (from.renameTo(to)) {
            removeMedia(mContext, from);
            updateMediaInGallery(mContext, to);
            return true;
        } else {
            return false;
        }
    }

    public static void updateMediaInGallery(Context c, File f) {
        Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
        intent.setData(Uri.fromFile(f));
        c.sendBroadcast(intent);
    }

    private static void removeMedia(Context c, File f) {
        ContentResolver resolver = c.getContentResolver();
        resolver.delete(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, MediaStore.Images.Media.DATA + "=?", new String[]{f.getAbsolutePath()});
    }