2
我試圖讓簡單的TextView
從Android的本機代碼顯示到我的Javascript視圖中。但是,應用程序就會失敗,我只看到默認的 「Hello World」無法獲取原生Android視圖以顯示在React Native中
RCTScannerViewManager.java
public class RCTScannerViewManager extends SimpleViewManager<TextView> {
public static final String REACT_CLASS = "RCTScannerView";
@Override
public String getName() {
return REACT_CLASS;
}
@Override
protected TextView createViewInstance(ThemedReactContext reactContext) {
TextView tv = new TextView(reactContext);
tv.setText("hello from android !");
return tv;
}
}
RCTScannerViewPackage.java
public class RCTScannerViewPackage implements ReactPackage {
@Override
public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
return Collections.emptyList();
}
@Override
public List<Class<? extends JavaScriptModule>> createJSModules() {
return Collections.emptyList();
}
@Override
public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
return Arrays.<ViewManager> asList(
new RCTScannerViewManager()
);
}
}
MainApplication.java
@Override
protected List<ReactPackage> getPackages() {
return Arrays.<ReactPackage>asList(
new MainReactPackage(),
new RCTScannerViewPackage()
);
}
};
個
ScannerView.js
import React, { Component } from 'react'
import { Text, View, requireNativeComponent } from 'react-native'
class ScannerView extends Component {
render() {
return <RCTScannerView />
}
}
ScannerView.propTypes = {
...View.propTypes
}
const RCTScannerView = requireNativeComponent('RCTScannerView', ScannerView);
export default ScannerView
index.android.js
import React, { Component } from 'react'
import { AppRegistry, Text, View } from 'react-native';
import ScannerView from './ScannerView';
class AwesomeProject extends Component {
render() {
return (
<View>
<Text> Hello world </Text>
<ScannerView></ScannerView>
</View>
);
}
}
AppRegistry.registerComponent('AwesomeProject',() => AwesomeProject)
該訣竅太感謝你了!這些樣式是否覆蓋'View.onDraw'中設置的尺寸? – Carpetfizz
你指的是原生的Android佈局屬性(LayoutParams)嗎?如果是這樣,那麼是您在ViewManager中本機端設置的值將被React Native框架覆蓋。正如我寫的,RN使用完全獨立的佈局系統,原生Android LayoutParams與此無關。 –
非常感謝!我已經堅持了近一個月,並轉移到其他項目。你回答了我被放回RN的那一天:) – Carpetfizz