readAsDataUrl function no output - ionic-framework

Question

i am using ionic 5 & capacitor.
For some reason, the readAsDataURL isnt working and it isnt showing me an error message either.
the path & file name seem fine, they are :
filePath: file:///storage/emulated/0/Android/data/io.ionic.starter/cache/1763816379-cropped.jpg
path : file:///storage/emulated/0/Android/data/io.ionic.starter/cache/
fileName: 1763816379-cropped.jpg
showCroppedImage(ImagePath) {
var filePath = ImagePath;
let fileName = filePath.split("/").pop();
let path = filePath.substring(0, filePath.lastIndexOf("/") + 1);
alert(filePath);
alert(fileName);
alert(path);
alert("works till here");
this.file
.readAsDataURL(path, fileName)
.then((base64) => {
alert(base64);
})
.catch((err) => {
console.log(err);
alert(err);
});
}

Answer 1

this.file.createFile(
this.file.externalDataDirectory,
"base64string.txt",
true
);
this.file.readAsText(this.file.externalDataDirectory, "base64string.txt");
this.blob = new Blob([this.base64string]);
this.file
.writeFile(
this.file.externalDataDirectory,
"base64string.txt",
this.blob,
{ replace: true, append: false }
)
.then(() => {
alert("File saved in internal storage/android/data/io.starter.ionic/");
});
}
Earlier, my file was getting saved in an internal directory which was not accessible by a user. So i used the externalDataDirectory function, which fixed my issue. It stores the file in an external directory which is accessible by the user.
The file is stored in "internal storage/android/data/#app_id#/"

Answer 2

I ended up sorting the problem for my application and I have included it below:
/** #desc crop the selected image */
async cropImage(fileUrl: any) {
this.show_spinner = true;
await this.ionLoader.showLoader('Cropping Image...');
this.crop.crop(fileUrl, {
quality: 75,
targetHeight: 320,
targetWidth: 240
})
.then(
async (newImage) => {
this.show_spinner = false;
await this.ionLoader.hideLoader();
this.showCroppedImage(newImage.split('?')[0]);
},
async (error: IonicResultMessageInterface) => {
this.show_spinner = false;
await this.ionLoader.hideLoader();
console.error('Error cropping image', error);
console.log(error);
this.setUserProfileImage();
this.toasterService.showToast(error.message, 'failure');
}
);
}
/** #desc show the image after it has been cropped */
async showCroppedImage(ImagePath: string) {
console.log(ImagePath);
this.show_spinner = true;
const copyPath = ImagePath;
const splitPath = copyPath.split('/');
const imageName = splitPath[splitPath.length - 1];
const file_ext = imageName.substr(imageName.lastIndexOf('.') + 1);
try {
const base64 = await Filesystem.readFile({ path: ImagePath});
if (base64) {
console.log(base64);
this.userImageUrl = 'data:image/' + file_ext + ';base64,' + base64.data;
this.show_spinner = false;
await this.updateProfilePictureMethod();
} else {
this.show_spinner = false;
console.log('Error in the showCroppedImage File method');
console.log('Unexpected Error');
this.setUserProfileImage();
this.toasterService.showToast('Unexpected Error Occurred in the showCroppedImage File', 'failure');
}
} catch (error) {
this.show_spinner = false;
console.log('Error in the showCroppedImage File method');
console.log('Unexpected Error');
this.setUserProfileImage();
this.toasterService.showToast(error.message, 'failure');
}
}