reactjs – 在React Native上为android创建自定义UI组件失败.应

由于Facebook登录按钮本身可用,我想要一个适用于 Android的React Native包装器组件.所以,我试着写它.但应用程序甚至在开始之前就崩溃了.
我的github存储库是：
https://github.com/lalith26/react-native-fb-login-android

我做了以下事情：

>我为LoginButton facebook小部件创建了Manager：

https://github.com/lalith26/react-native-fb-login-android/blob/master/android/app/src/main/java/com/fbloginbutton2/FBLoginButtonManager.java

>我创建了一个扩展MainReactPackage的ReactPackage：

https://github.com/lalith26/react-native-fb-login-android/blob/master/android/app/src/main/java/com/fbloginbutton2/FBLoginButtonReactPackage.java

>我在MainActivity中添加了新的ReactPackage：

https://github.com/lalith26/react-native-fb-login-android/blob/master/android/app/src/main/java/com/fbloginbutton2/MainActivity.java#L29

>我包含了facebook登录sdk的gradle依赖

https://github.com/lalith26/react-native-fb-login-android/blob/master/android/app/build.gradle#L28

>我使JS组件包装了Native组件：

https://github.com/lalith26/react-native-fb-login-android/blob/master/fblogin.js

>最后我使用了JS组件：

https://github.com/lalith26/react-native-fb-login-android/blob/master/index.android.js#L21

我通过网络阅读并发现必须传递propTypes.我也试过了.但应用程序在启动时崩溃了.我无法看到任何日志.所以,我无法找到问题的实际原因.
我为一个按钮尝试了相同的一组步骤,它工作正常.

有什么我只是做错了.请帮忙..

我通过logcat访问了模拟器的日志.表明：

E/AndroidRuntime( 2550): Process: com.fbloginbutton2,PID: 2550
E/AndroidRuntime( 2550): java.lang.ExceptionInInitializerError
E/AndroidRuntime( 2550): at
com.fbloginbutton2.FBLoginButtonManager.createViewInstance(FBLoginButtonManager.java:29)
E/AndroidRuntime( 2550): at
com.fbloginbutton2.FBLoginButtonManager.createViewInstance(FBLoginButtonManager.java:15)
E/AndroidRuntime( 2550): at
com.facebook.react.uimanager.ViewManager.createView(ViewManager.java:41)
E/AndroidRuntime( 2550): at
com.facebook.react.uimanager.NativeViewHierarchyManager.createView(NativeViewHierarchyManager.java:172)
E/AndroidRuntime( 2550): at
com.facebook.react.uimanager.UIViewOperationQueue$CreateViewOperation.execute(UIViewOperationQueue.java:137)
E/AndroidRuntime( 2550): at
com.facebook.react.uimanager.UIViewOperationQueue$1.run(UIViewOperationQueue.java:574)
E/AndroidRuntime( 2550): at
com.facebook.react.uimanager.UIViewOperationQueue$DispatchUIFrameCallback.doFrameGuarded(UIViewOperationQueue.java:622)
E/AndroidRuntime( 2550): at
com.facebook.react.uimanager.GuardedChoreographerFrameCallback.doFrame(GuardedChoreographerFrameCallback.java:32)
E/AndroidRuntime( 2550): at
com.facebook.react.uimanager.ReactChoreographer$ReactChoreographerDispatcher.doFrame(ReactChoreographer.java:114)
E/AndroidRuntime( 2550): at
android.view.Choreographer$CallbackRecord.run(Choreographer.java:765)
E/AndroidRuntime( 2550): at
android.view.Choreographer.doCallbacks(Choreographer.java:580)
E/AndroidRuntime( 2550): at
android.view.Choreographer.doFrame(Choreographer.java:549)
E/AndroidRuntime( 2550): at
android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
E/AndroidRuntime( 2550): at
android.os.Handler.handleCallback(Handler.java:739) E/AndroidRuntime(
2550): at android.os.Handler.dispatchMessage(Handler.java:95)
E/AndroidRuntime( 2550): at android.os.Looper.loop(Looper.java:135)
E/AndroidRuntime( 2550): at
android.app.ActivityThread.main(ActivityThread.java:5221)
E/AndroidRuntime( 2550): at java.lang.reflect.Method.invoke(Native
Method) E/AndroidRuntime( 2550): at
java.lang.reflect.Method.invoke(Method.java:372) E/AndroidRuntime(
2550): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
E/AndroidRuntime( 2550): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
E/AndroidRuntime( 2550): Caused by: null E/AndroidRuntime( 2550): at
com.facebook.internal.Validate.sdkInitialized(Validate.java:99)
E/AndroidRuntime( 2550): at
com.facebook.FacebookSdk.getCallbackRequestCodeOffset(FacebookSdk.java:735)
E/AndroidRuntime( 2550): at
com.facebook.internal.CallbackManagerImpl$RequestCodeOffset.toRequestCode(CallbackManagerImpl.java:109)
E/AndroidRuntime( 2550): at
com.facebook.login.widget.LoginButton.(LoginButton.java:58)
E/AndroidRuntime( 2550): … 21 more W/ActivityManager( 1327):
Force finishing activity com.fbloginbutton2/.MainActivity
E/EGL_emulation( 1373): tid 1373: eglCreateSyncKHR(1181): error 0x3004
(EGL_BAD_ATTRIBUTE)

import com.flaviofaria.kenburnsview.KenBurnsView;

import com.facebook.react.uimanager.SimpleViewManager;
import com.facebook.react.uimanager.ThemedReactContext;
import com.facebook.react.uimanager.ReactProp;

import java.io.InputStream;

import android.graphics.drawable.Drawable;
import android.util.Log;

public class KenBurnsViewManager extends SimpleViewManager<KenBurnsView> {

  public static final String REACT_CLASS = "KenBurnsView";
  private ThemedReactContext ctx;

  @Override
  public String getName() {
    return REACT_CLASS;
  }

  @Override
  protected KenBurnsView createViewInstance(ThemedReactContext context) {
    ctx = context;
    return new KenBurnsView(context);
  }

  @ReactProp(name = "source")
  public void setSource(KenBurnsView view,String source) {
    try {
      InputStream ims = ctx.getAssets().open("images/" + source);
      Drawable d = Drawable.createFromStream(ims,null);
      view.setImageDrawable(d);
    } catch (Exception ex) {
      Log.e("KenBurnsView","setSource",ex);
    }
  }
}

import com.facebook.react.ReactPackage;
import com.facebook.react.bridge.JavaScriptModule;
import com.facebook.react.bridge.NativeModule;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.uimanager.ViewManager;

import java.util.Collections;
import java.util.List;
import java.util.Arrays;
import java.util.ArrayList;

public class KenBurnsViewPackage implements ReactPackage {
    @Override
    public List<NativeModule> createNativeModules(
        ReactApplicationContext reactContext) {

        List<NativeModule> modules = new ArrayList<>();

        return modules;
    }

    @Override
    public List<ViewManager> createViewManagers(
            ReactApplicationContext reactContext) {
        return Arrays.<ViewManager>asList(
            new KenBurnsViewManager()
        );
    }

    @Override
    public List<Class<? extends JavaScriptModule>> createJSModules() {
      return Collections.emptyList();
    }
}

mReactInstanceManager = ReactInstanceManager.builder()
                .setApplication(getApplication())
                .setBundleAssetName("index.android.bundle")
                .setJSMainModuleName("index.android")
                .addPackage(new MainReactPackage())
                .addPackage(new KenBurnsViewPackage()) // <- add package
                .setUseDeveloperSupport(BuildConfig.DEBUG)
                .setInitialLifecycleState(LifecycleState.RESUMED)
                .build();

dependencies {
    compile fileTree(dir: "libs",include: ["*.jar"])
    compile "com.android.support:appcompat-v7:23.0.1"
    compile "com.facebook.react:react-native:0.16.+"
    compile "com.flaviofaria:kenburnsview:1.0.6"
}

var { requireNativeComponent,PropTypes,View } = require('react-native');

var iface = {
  propTypes: {
    ...View.propTypes,source: PropTypes.string,},};

module.exports = requireNativeComponent('KenBurnsView',iface);

var KenBurnsView = require('./KenBurnsView');
.
.
.
<KenBurnsView source={'image.jpg'} style={{width:null,height: 300}}/>