index.android.js

import {
    NativeModules
} from 'react-native';
const PromptAndroid = NativeModules.PromptAndroid;

export default function prompt(title, message, callbackOrButtons, options) {
    const defaultButtons = [
      {
        text: 'Cancel',
      },
      {
        text: 'OK',
        onPress: callbackOrButtons
      }
    ];

    let buttons = typeof callbackOrButtons === 'function'
      ? defaultButtons
      : callbackOrButtons;
      
    let config = {
        title: title || '',
        message: message || '',
    };

    if (options) {
        config = {
            ...config,
            cancelable: options.cancelable !== false,
            type: options.type || 'default',
            style: options.style || 'default',
            defaultValue: options.defaultValue || '',
            placeholder: options.placeholder || ''
        };
    }
    // At most three buttons (neutral, negative, positive). Ignore rest.
    // The text 'OK' should be probably localized. iOS Alert does that in native.
    const validButtons = buttons ? buttons.slice(0, 3) : [{text: 'OK'}];
    const buttonPositive = validButtons.pop();
    const buttonNegative = validButtons.pop();
    const buttonNeutral = validButtons.pop();

    if (buttonNeutral) {
        config = {...config, buttonNeutral: buttonNeutral.text || '' };
    }
    if (buttonNegative) {
        config = {...config, buttonNegative: buttonNegative.text || '' };
    }
    if (buttonPositive) {
        config = {
            ...config,
            buttonPositive: buttonPositive.text || ''
        };
    }


    PromptAndroid.promptWithArgs(
        config,
        (action, buttonKey, input) => {
            if (action !== PromptAndroid.buttonClicked) {
                return;
            }
            if (buttonKey === PromptAndroid.buttonNeutral) {
                buttonNeutral.onPress && buttonNeutral.onPress(input);
            } else if (buttonKey === PromptAndroid.buttonNegative) {
                buttonNegative.onPress && buttonNegative.onPress();
            } else if (buttonKey === PromptAndroid.buttonPositive) {
                buttonPositive.onPress && buttonPositive.onPress(input);
            }
        }
    );
}