Hello im building simple app that get images from remote server and display them , im trying to save images to ios/android gallery . im using filetrasnfert to get the images and in log ( ios showing )
when i tape an image it get downloaded and saved in app data I GESS but it’s not been saved to gallery
how can i save it to device album .
heer is my code 
any easy or best solution please
download(url,filename) {
console.log("im called download");
const fileTransfer: FileTransferObject = this.transfer.create();
fileTransfer.download(url, this.file.dataDirectory +filename).then((entry) => {
let filePath: string = entry.toURL();
this.base64.encodeFile(filePath).then((base64File: string) => {
console.log("im called encodeFile");
var blob =base64File;
this.savetogallry(blob);
}, (err) => {
console.log(err);
});
console.log('download complete: ' + entry.toURL());
}, (error) => {
// handle error
});
}
base64toBlob(b64Data: string, contentType?: string, sliceSize?: number): Blob {
contentType = contentType || '';
sliceSize = sliceSize || 512;
const byteCharacters: string = atob(b64Data);
const byteArrays: Array<Uint8Array> = [];
for (let offset = 0; offset < byteCharacters.length; offset += sliceSize) {
const slice: string = byteCharacters.slice(offset, offset + sliceSize);
const byteNumbers: Array<number> = new Array(slice.length);
for (let i = 0; i < slice.length; i++) {
byteNumbers[i] = slice.charCodeAt(i);
}
const byteArray: Uint8Array = new Uint8Array(byteNumbers);
byteArrays.push(byteArray);
}
const blob: Blob = new Blob(byteArrays, {type: contentType});
return blob;
}
savetogallry(blob){
console.log("im called to save in library");
this.base64ToGallery.base64ToGallery(blob, { prefix: '_img', mediaScanner:true }).then(
res => console.log('Saved image to gallery ', res),
err => console.log('Error saving image to gallery ', err)
);
}