Get base64 String from Image URI

Question

I have content:// URI of an image and I want to convert it to base64. I don't know how to do this.

Here is my code:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode==123 && resultCode==RESULT_OK) {
        Uri selectedfile = data.getData(); //The uri with the location of the file
        if (selectedfile != null) {
            Log.e("image", selectedfile.toString());
        }
    }
}

Answer 1

You can do it by using 2 steps.

1- URI to Bitmap conversion:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode==123 && resultCode==RESULT_OK) {
        Uri selectedfile = data.getData(); //The uri with the location of the file
        if (selectedfile != null) {
           Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), selectedfile);
        }
    }
}

2- Bitmap to Base64 String conversion:

ByteArrayOutputStream outputStream = new ByteArrayOutputStream();  
bitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream);
byte[] byteArray = outputStream.toByteArray();

String encodedString = Base64.encodeToString(byteArray, Base64.DEFAULT);

As a result:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode==123 && resultCode==RESULT_OK) {
        Uri selectedfile = data.getData(); //The uri with the location of the file
        if (selectedfile != null) {
           Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), selectedfile);

           ByteArrayOutputStream outputStream = new ByteArrayOutputStream();  
           bitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream);
           byte[] byteArray = outputStream.toByteArray();

           //Use your Base64 String as you wish
           String encodedString = Base64.encodeToString(byteArray, Base64.DEFAULT);
        }
    }
}