News App DEMO Source Code – Fyne Golang Gui tutorial 70
News App DEMO Source Code – Fyne Golang Gui tutorial 70
In this tutorial we are going to consume news api from gnews.io
Api token can be easily created on gnews.io
Api http request
https://gnews.io/api/v4/top-headlines?token=API-Token
Source Code
package main
import (
"encoding/json"
"fmt"
"image/color"
"io/ioutil"
"net/http"
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/app"
"fyne.io/fyne/v2/canvas"
"fyne.io/fyne/v2/container"
"fyne.io/fyne/v2/widget"
)
var num_article int = 1
var news News
func main() {
a := app.NewWithID("")
w := a.NewWindow("News App")
w.Resize(fyne.NewSize(300, 400))
URL := fmt.Sprintf("https://gnews.io/api/v4/top-headlines?token=4ae5b4030f29f64bcc70e25417a83699&lang=en&max=100")
//API
res, _ := http.Get(URL)
defer res.Body.Close()
body, _ := ioutil.ReadAll(res.Body)
news, _ = UnmarshalNews(body)
fmt.Println(news)
// num_article = int(news.TotalArticles)
label2 := widget.NewLabel(fmt.Sprintf("No of articles:%d",
news.TotalArticles))
//show title
label3 := widget.NewLabel(fmt.Sprintf("%s", news.Articles[1].Title))
label3.TextStyle = fyne.TextStyle{Bold: true}
label3.Wrapping = fyne.TextWrapBreak
// show articles
entry1 := widget.NewLabel(fmt.Sprintf("%s",
news.Articles[1].Description))
//entry1.MultiLine = true
entry1.Wrapping = fyne.TextWrapBreak
//entry1.Resize(fyne.NewSize(300, 400))
//entry1.Resize(fyne.NewSize(300, 300))
// label4 := widget.NewLabel(fmt.Sprintf("Article: %s", news.Articles[0].Description))
btn := widget.NewButton("Next", func() {
num_article += 1
label3.Text = news.Articles[num_article].Title
entry1.Text = news.Articles[num_article].Description
label3.Refresh()
entry1.Refresh()
})
label1 := canvas.NewText("News App", color.Black)
label1.Alignment = fyne.TextAlignCenter
label1.TextStyle = fyne.TextStyle{Bold: true}
img := canvas.NewImageFromFile("news.png")
// img.Resize(fyne.NewSize(150, 150))
img.FillMode = canvas.ImageFillOriginal
e := container.NewVBox(label1, label3, entry1, btn)
e.Resize(fyne.NewSize(300, 300))
c := container.NewBorder(img, label2, nil, nil, e)
w.SetContent(c)
w.ShowAndRun()
}
// This file was generated from JSON Schema using quicktype, do not modify it directly.
// To parse and unparse this JSON data, add this code to your project and do:
//
// news, err := UnmarshalNews(bytes)
// bytes, err = news.Marshal()
func UnmarshalNews(data []byte) (News, error) {
var r News
err := json.Unmarshal(data, &r)
return r, err
}
func (r *News) Marshal() ([]byte, error) {
return json.Marshal(r)
}
type News struct {
TotalArticles int64 `json:"totalArticles"`
Articles []Article `json:"articles"`
}
type Article struct {
Title string `json:"title"`
Description string `json:"description"`
Content string `json:"content"`
URL string `json:"url"`
Image string `json:"image"`
PublishedAt string `json:"publishedAt"`
Source Source `json:"source"`
}
type Source struct {
Name string `json:"name"`
URL string `json:"url"`
}
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