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：
>我创建了一个扩展MainReactPackage的ReactPackage：
>我在MainActivity中添加了新的ReactPackage：
>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)
KenBurnsViewManager.Java：
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);
}
}
}
KenBurnsViewPackage.Java：
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();
}
}
更新MainActivity.Java：
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();
更新android / app / build.gradle：
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"
}
KenBurnsView.js：
var { requireNativeComponent,PropTypes,View } = require('react-native');
var iface = {
propTypes: {
...View.propTypes,source: PropTypes.string,},};
module.exports = requireNativeComponent('KenBurnsView',iface);
就是这样,现在你可以添加新的自定义KenBurnsView组件,例如：
var KenBurnsView = require('./KenBurnsView');
.
.
.
<KenBurnsView source={'image.jpg'} style={{width:null,height: 300}}/>
