Question

我使用react-native创建了一个应用程序，但是我需要从android小部件触发一个react事件。这是我目前的设置：

public class IsHetAlBierTijdWidget extends AppWidgetProvider {

    static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
                                int appWidgetId) {

        CharSequence widgetText = context.getString(R.string.app_name);
        // Construct the RemoteViews object
        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.is_het_al_bier_tijd_widget);

        // Instruct the widget manager to update the widget
        appWidgetManager.updateAppWidget(appWidgetId, views);
    }

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        // There may be multiple widgets active, so update all of them
        for (int appWidgetId : appWidgetIds) {
            updateAppWidget(context, appWidgetManager, appWidgetId);
            sendEventToReactApp(context);
        }
    }

    @Override
    public void onEnabled(Context context) {
        // Enter relevant functionality for when the first widget is created
    }

    @Override
    public void onDisabled(Context context) {
        // Enter relevant functionality for when the last widget is disabled
    }

    public void sendEventToReactApp(Context context) {
        WritableMap event = Arguments.createMap();
        event.putString("message", "MyMessage");
        ReactApplicationContext reactApplicationContext = new ReactApplicationContext(context);
        MSREventBridgeModule msrEventBridgeModule = new MSREventBridgeModule(reactApplicationContext);
        msrEventBridgeModule.emitEvent("Widget_Update",event);
    }
}

反应代码：

class Home extends Component {

    constructor(){
        super();
        this.onWidgetUpdate.bind(this);
    }

    onWidgetUpdate(){
        console.log("widget update...");
    }

    componentWillMount() {
        this.props.fetchBierTijd()
        DeviceEventEmitter.addListener('Widget_Update', this.onWidgetUpdate);
    }

    componentWillUnmount() {
        DeviceEventEmitter.removeListener('Widget_Update', this.onWidgetUpdate);
    }

    render() {
        return (
            <View style={{flex: 1, justifyContent:'center', alignItems:'center'}}>
                <Countdown
                    style={{marginTop: 80}} fontSize="40"
                    isBiertijd={this.props.isBierTijd}
                    timeLeft={this.props.timeLeft}
                />
            </View>
        )
    }
}

const mapStateToPros = state => ({
    fetching: state.bierTijd.fetching,
    isBierTijd: state.bierTijd.isBierTijd,
    nextBierTijd: state.bierTijd.next,
    timeLeft: moment(state.bierTijd.next).diff(moment())
})


const mapDispatchToProps = dispatch => {
    return bindActionCreators({...bierTijdActions,}, dispatch)
}

export default connect(mapStateToPros, mapDispatchToProps)(Home)

是否可以执行此操作，或者是否需要从主要活动触发事件？从原生到本土的反应的良好解释也将受到赞赏。

Answer 1

绝对可以，您可以在这里找到指南：

React Native Android Widget Proof of Concept

您必须创建一个BroadcastReceiver（即WidgetProvider）和一个HeadlessJS任务来将两者通信。也许还有其他方法，但至少这个方法有效！

从widget - android触发react-native事件

1 个答案:

React Native Android Widget Proof of Concept