why does the message have my app name before it pops up and how to remove it?

[kikyo20]

Expected behaviour

show message without my app name.

Actual behaviour

There is something in front of the pop-up message.

• Android device

Meh

showToast(message = '操作完成', duration: any = 2000): void {
if (this.isMobile()) {
// Toast-PhoneGap-Plugin
this.toast.show(message, duration,'center').subscribe();
} else {
//...
...
}
}