Trigger app update programatically

android_autoupdate.js

function doWeHaveLatestVersion(){
    return true;//compare app version with version of apk in server
} 

if(!doWeHaveLatestVersion()){
      fileUri="file:///storage/emulated/0/";             
       window.resolveLocalFileSystemURL(
          fileUri,
          onFileResolved,
          onFileResolveError);  
          
function onFileResolved(fe){
                fe.getFile('appname.apk', {
                create: true, 
                exclusive: false
                }, function(fileEntry) {
                console.log("apk donwload started") 
                var localPath = fileEntry.toURL(),
                fileTransfer = new FileTransfer();        
                var apkURL = encodeURI("location of the latest apk");
                fileTransfer.download(apkURL, localPath, function(entry) {
                console.log("apk download complete");
                window.plugins.webintent.startActivity({
                action: window.plugins.webintent.ACTION_VIEW,
                url:  entry.toURL(),
                type: 'application/vnd.android.package-archive'
                },
            function(data){console.log("webintent succeeded, data:"+data)},
            function(e){
                    console.log('Error launching app update'+e);
            }
        );                              
                    console.log("apk installation triggered");
    }, function (error) {
                    console.log("Error downloading APK: " + error.message);
    });
    }, function(evt){
                    console.log("error getting root filesytem: " + evt);                                               
                });
                    console.log("resovled the root folder,URL"+fe.toURL())
            }

    function onFileResolveError(er){
                    console.log("Error while resolving the root folder:"+er.message)
            }
            }