Answer by Mukeyii for React native list of pickers doesn't refresh

Why do you slice arrays and read/update from them, if you need a single value?

Use a second state attribute and connect with your component:

 state = {..., value: ''}

...handle change as follows:

 onValueChange(value, rId) {
    // do something with your arrays, if necessary...
    let sd = this.state.selected_date.slice();
    sd[rId] = value;
    this.setState({value: value, selected_date: sd});
  }

with this picker prop...

  selectedValue={this.state.value}