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Suposing that you are using react-native (i mean building an application) and the card is already created, try to replace you function for the next code:
function contenidoNuevo () {
var Obj = this.state.difference_days;
return <>
{Obj != 0 &&
<View>Hola George!</View>
}
{Obj == 0 &&
<Card
title="Conversaciones por día del mes"
chartType="line"
labels={Object.keys(this.state.day_month_conversation)}
datasets={[
{
label: 'Número de conversaciones actuales',
fill: false,
lineTension: 0.1,
backgroundColor: '#F07C30',
borderColor: '#FA6A01',
borderCapStyle: 'butt',
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: '#F07C30',
pointBackgroundColor: '#FA6A01',
pointBorderWidth: 1,
pointHoverRadius: 5,
pointHoverBackgroundColor: '#F07C30',
pointHoverBorderColor: '#FA6A01',
pointHoverBorderWidth: 2,
pointRadius: 1,
pointHitRadius: 10,
data: Object.values(this.state.day_month_conversation)
}
]}
/>
}
</>
}
I hope it helped you.
Source:stackexchange.com