Problem to download pdf in base 64 (ionic 3)

@NFB wrote:

I have a problem when i’ll try download pdf in base 64, I’ve tried a lot of ways but it doesn’t work.

When i’ll try download in android device not work, but if is in web i don’t have any problem.

First try: Download in web but not in android device

var array = base64ToArrayBuffer(x);

 var sampleArr = base64ToArrayBuffer(base);
  saveByteArray(name, sampleArr);

function base64ToArrayBuffer(base64) {
var binaryString = window.atob(base64);
var binaryLen = binaryString.length;
var bytes = new Uint8Array(binaryLen);
for (var i = 0; i < binaryLen; i++) {
var ascii = binaryString.charCodeAt(i);
bytes[i] = ascii;
}
return bytes;
}

function saveByteArray(reportName, byte) {
var blob = new Blob([byte]);
var link = document.createElement(‘a’);
link.href = window.URL.createObjectURL(blob);
var fileName = reportName + “.pdf”;
link.download = fileName;
link.click();
};

Second try: externalApplicationStorageDirectory || ApplicationDirectory not found the route

let downloadPDF: any = ‘mybase64’
fetch(‘data:application/pdf;base64,’ + downloadPDF,
{
method: “GET”
}).then(res => res.blob()).then(blob => {
this.file.writeFile(this.file.externalApplicationStorageDirectory, ‘name.pdf’, blob, { replace: true }).then(res => {
this.fileOpener.open(
res.toInternalURL(),
‘application/pdf’
).then((res) => {

          }).catch(err => {
            console.log(err)
          });
        }).catch(err => {
              console.log(err)
   });
      }).catch(err => {
             console.log(err)
      });

third try: Again, download in web but not in android device

and

fourth try: window.resolveLocalFileSystemURL doesn’t exist in window and i’ll try the answer window[‘resolveLocalFileSystemURL’] is not a function.

I need download pdf, please heeeeelp me.

Regards and thanks for help.

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