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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"ClassCastException when using @Extra with Parcelable[] objects","articleBody":"Given I have a model class `RemoteMediaFile`, which is roughly defined like this:\n\n``` java\npublic class RemoteMediaFile implements Parcelable {\n    private String mId;\n    private String mParentId;\n    public RemoteMediaFile() {\n    }\n\n    @Override\n    public int describeContents() {\n        return 0;\n    }\n\n    @Override\n    public void writeToParcel(Parcel dest, int flags) {\n        dest.writeString(this.mId);\n        dest.writeString(this.mParentId);\n    }\n\n    private RemoteMediaFile(Parcel in) {\n        this.mId = in.readString();\n        this.mParentId = in.readString();\n    }\n\n    public static final Creator\u003cRemoteMediaFile\u003e CREATOR = new Creator\u003cRemoteMediaFile\u003e() {\n        public RemoteMediaFile createFromParcel(Parcel source) {\n            return new RemoteMediaFile(source);\n        }\n\n        public RemoteMediaFile[] newArray(int size) {\n            return new RemoteMediaFile[size];\n        }\n    };\n}\n```\n\nThen I'd like to use `@Extra` in my `Activity`, which should read the array from an Intent:\n\n``` java\n@EActivity\npublic class RemotePhotoDetailActivity extends BaseActivity implements RemotePlayer{\n    @Extra\n    protected RemoteMediaFile[] remoteFiles;\n}\n```\n\nHowever, this creates a ClassCastException:\n\n```\nCaused by: java.lang.ClassCastException: android.os.Parcelable[] cannot be cast to com.myapp.media.RemoteMediaFile[]\n       at com.myapp.photos.RemotePhotoDetailActivity_.injectExtras_(RemotePhotoDetailActivity_.java:168)\n       at com.myapp.photos.RemotePhotoDetailActivity_.init_(RemotePhotoDetailActivity_.java:109)\n       at com.myapp.photos.RemotePhotoDetailActivity_.onCreate(RemotePhotoDetailActivity_.java:103)\n       at android.app.Activity.performCreate(Activity.java:5231)\n       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)\n       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)\n       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)\n       at android.app.ActivityThread.access$800(ActivityThread.java:135)\n       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)\n       at android.os.Handler.dispatchMessage(Handler.java:102)\n       at android.os.Looper.loop(Looper.java:136)\n       at android.app.ActivityThread.main(ActivityThread.java:5001)\n       at java.lang.reflect.Method.invokeNative(Native Method)\n       at java.lang.reflect.Method.invoke(Method.java:515)\n       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)\n       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)\n       at dalvik.system.NativeStart.main(Native Method)\n```\n\nThe generated code looks like this:\n\n``` java\n    private void injectExtras_() {\n        Bundle extras_ = getIntent().getExtras();\n        if (extras_!= null) {\n            if (extras_.containsKey(REMOTE_FILES_EXTRA)) {\n                remoteFiles = ((RemoteMediaFile[]) extras_.getParcelableArray(REMOTE_FILES_EXTRA));\n            }\n        }\n    }\n```\n\nA fix would be to read the `RemoteMediaFile[]` object from the intent like this:\n\n``` java\n    private void injectExtras_() {\n        Bundle extras_ = getIntent().getExtras();\n        if (extras_!= null) {\n            if (extras_.containsKey(REMOTE_FILES_EXTRA)) {\n                Parcelable[] a = extras_.getParcelableArrayExtra(REMOTE_FILES_EXTRA);\n                remoteFiles = Arrays.copyOf(a, a.length, RemoteMediaFile[].class);\n            }\n        }\n    }\n```\n\nWhen I do this manually, it will work properly.\n\nMore details here: http://stackoverflow.com/a/10781119/375209\n","author":{"url":"https://github.com/ened","@type":"Person","name":"ened"},"datePublished":"2014-11-05T07:00:36.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":23},"url":"https://github.com/1208/androidannotations/issues/1208"}