由网友(风清月皎)分享简介：我已经在我的Andr​​oid项目自定义web视图，如下所示：I have a custom Webview in my android project as shown below:public class MyWebView extends WebView {public MyWebView(Context c...

我已经在我的Andr​​oid项目自定义web视图，如下所示：

I have a custom Webview in my android project as shown below:

public class MyWebView extends WebView {

    public MyWebView(Context context) {
        super(context);
    }

   public class JsObject {

        @JavascriptInterface
        public void show() {
            //...
        }

        @JavascriptInterface
        public void hide() {
            //....
        }
}

这包括 JavascriptInterface ，我用从JavaScript的一面传达给Android的一面。

that includes a JavascriptInterface which I use to communicate from the JavaScript side to the Android side.

在AndroidManifest我有以下

In the AndroidManifest I had the following

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="16" />

在我使用ProGuard的项目，宣布：

In the project I used proguard which declared:

-keepattributes JavascriptInterface

-keepclassmembers class * {
    @android.webkit.JavascriptInterface <methods>;
}

和一切工作正常。

然而，当我改变了我的Andr​​oidManifest为安卓targetSdkVersion = 18 或 19 和测试设备上有18以上，ProGuard的似乎莫名其妙地乱而不能访问了JavaScript的方法。

However when i changed my AndroidManifest to android:targetSdkVersion=18 or 19 and test on devices with 18 and above, proguard seems to somehow mess the JavaScript methods which are not accessible anymore.

如果我放回到16或任何小于17一切工作正常。此外这种情况只使用ProGuard。如果我不使用ProGuard的一切工作正常，即使安卓？targetSdkVersion = 18 或19。谁能帮助，使其在清单中的Andr​​oid> 17时，针对工作

If I put back to 16 or anything less than 17 everything works fine. Additionally this happens only with proguard. If I don't use proguard everything works fine even with android:targetSdkVersion=18 or 19. Can anyone help to make it work when targeting in the manifest Android > 17?

推荐答案

我复制我的回答从这个话题您：http://stackoverflow.com/a/19994873/1735499

I copy my answer from this topic for you: http://stackoverflow.com/a/19994873/1735499

而且，如果你正在使用Proguard的，记得要加这个

And, if you are using Proguard, remember to add this

-keepclassmembers class * {
    @android.webkit.JavascriptInterface <methods>;
}

-keepattributes JavascriptInterface
-keep public class com.mypackage.MyClass$MyJavaScriptInterface
-keep public class * implements com.mypackage.MyClass$MyJavaScriptInterface
-keepclassmembers class com.mypackage.MyClass$MyJavaScriptInterface { 
    <methods>; 
}

如果它仍然不能确定，添加此

If it's still not OK, add this

-keepattributes *Annotation*

请注意：你的MyJavaScriptInterface必须是公共类

Note: your MyJavaScriptInterface must be Public class

参考号码：Android Proguard的Javascript的接口故障

BR，

弗兰克