NoSuchMethodError for VideoView.setOnPreparedListener（）

Question

我在使用Proguard和我的自定義VideoView for my app時遇到問題。似乎模糊我的代碼導致我的VideoView問題。每當我嘗試爲視頻設置OnPreparedListener時，我的應用程序都會崩潰。見：

11-13 15:54:45.881 19428-19428/com.<REDACTED> E/AndroidRuntime﹕ FATAL EXCEPTION: main 
Process: com.<REDACTED>, PID: 19428 
java.lang.NoSuchMethodError: No virtual method setOnPreparedListener(Landroid/media/MediaPlayer$e;)V in class Landroid/widget/VideoView; or its super classes (declaration of 'android.widget.VideoView' appears in /system/framework/framework.jar:classes2.dex) 
     at com.<REDACTED>.ui.module.MHVideoPlayerModule.initializeVideoPlayer(MHVideoPlayerModule.java:174) 
     at com.<REDACTED>.ui.module.MHVideoPlayerModule.initializeViewData(MHVideoPlayerModule.java:154) 
     at com.<REDACTED>.ui.activity.MHVideoDetailActivity.a(MHVideoDetailActivity.java:198) 
     at com.<REDACTED>.ui.activity.MHVideoDetailActivity.b(MHVideoDetailActivity.java:171) 
     at com.<REDACTED>.ui.activity.MHVideoDetailActivity.a_(MHVideoDetailActivity.java:255) 
     at com.<REDACTED>.service.f.al.b(MHVideoUrlTaskManager.java:131) 
     at com.<REDACTED>.service.a.e.onPostExecute(MHAsyncServiceTask.java:194) 
     at android.os.AsyncTask.finish(AsyncTask.java:632) 
     at android.os.AsyncTask.access$600(AsyncTask.java:177) 
     ... 

我已經嘗試將下面的行添加到Proguard文件，但他們沒有幫助。

-keep class com.<REDACTED>.ui.module.MHVideoPlayerModule { *; } 
-keep class android.widget.VideoView { *; } 

編輯：這裏是proguard-project.txt文件：

# If your project uses WebView with JS, uncomment the following 
# and specify the fully qualified class name to the JavaScript interface 
# class: 
-keepclassmembers class com.<REDACTED>.common.JavaScriptInterface { 
    public *; 
} 

# Google Play Services start 
# https://developer.android.com/google/play-services/setup.html 
-keep class * extends java.util.ListResourceBundle { 
    protected Object[][] getContents(); 
} 

-keep public class com.google.android.gms.common.internal.safeparcel.SafeParcelable { 
    public static final *** NULL; 
} 

-keepnames @com.google.android.gms.common.annotation.KeepName class * 
-keepclassmembernames class * { 
    @com.google.android.gms.common.annotation.KeepName *; 
} 

-keepnames class * implements android.os.Parcelable { 
    public static final ** CREATOR; 
} 
# Google Play Services end 

-dontwarn javax.jdo.** 
-dontwarn javax.naming.** 
-dontwarn com.google.api.client.googleapis.extensions.android.gms.** 
-dontwarn com.google.android.gms.** 
-dontwarn com.squareup.okhttp.** 

-keep public class android.net.http.SslError 
-keep public class android.webkit.WebViewClient 
-keep public class android.widget.VideoView 

-dontwarn android.webkit.WebView 
-dontwarn android.net.http.SslError 
-dontwarn android.webkit.WebViewClient 
-dontwarn android.media.MediaPlayer 
-dontwarn android.widget.VideoView 

-dontwarn org.bouncycastle.** 
-dontwarn org.apache.commons.codec.binary.Base64 

-keepattributes SourceFile,LineNumberTable 
-printusage build/outputs/proguard/unused.txt 
-printconfiguration build/outputs/proguard/configuration.txt 

-libraryjars libs 

-keep class com.crashlytics.** { *; } 
-keep class io.fabric.** { *; } 
-keep class android.support.v4.app.** { *; } 
-keep interface android.support.v4.app.** { *; } 
-keep class com.facebook.** { *; } 

# New Relic start 
# https://docs.newrelic.com/docs/mobile-monitoring/mobile-monitoring-installation/android/installing-android-apps-gradle-android-studio#proguard 
-keep class com.newrelic.** { *; } 
-dontwarn com.newrelic.** 
-keepattributes Exceptions, Signature, InnerClasses 
# New Relic end 

-dontshrink 

Answer 1

看樣子你也提供定製android.media.MediaPlayer和/或android.media.MediaPlayer.OnPreparedListener實施：

java.lang.NoSuchMethodError: No virtual method setOnPreparedListener(Landroid/media/MediaPlayer$e;)V in class Landroid/widget/VideoView; or its super classes (declaration of 'android.widget.VideoView' appears in /system/framework/framework.jar:classes2.dex)

setOnPreparedListener - 您呼叫

(L的方法 - 將smali前綴對象

android/media/MediaPlayer$e - 你試圖在傳遞給方法的實際類型名稱。 這是問題所在。內部類類型OnPreparedListener被混淆。它應該是android/media/MediaPlayer$OnPreparedListener

android/widget/VideoView試圖承載此方法簽名的類。

---

你有一個自定義的MediaPlayer或MediaPlayer.OnPreparedListener使用原包的名字呢？如果是這樣，你還需要排除Proguard中的那些。喜歡的東西：

-keep class android.media.** { *; }

Answer 2

只是看看在你的 「progaurd-project.txt」 插入下面一行的文件

-keep class android.widget.** { *; }