Oh sorry i didnt solved problem all night.
this.platform.registerBackButtonAction(() => {
if (this.counter == 0) {
this.counter++;
this.presentToast();
setTimeout(() => { this.counter = 0 }, 2000)
} else {
// console.log(“exitapp”);
this.platform.exitApp();
}
}, 0)
This code doesnt worked on 6.3 android device. where can the problem be