Unity同步/异步调用Android的方法实例

    public static String GetVideoParams() {
        MediaMetadataRetriever retriever = new MediaMetadataRetriever();
        retriever.setDataSource(LOCAL_VIDEO_PATH);
        String width = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH); //宽
        String height = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT); //高
        Log.w(TAG, "GetVideoParams, width " + width + " height " + height);
        return width +"_" + height;
    }

AndroidJavaObject androidVideoPlugin = new AndroidJavaObject("com.iqiyi.cutgreenvideosdk.VideoPlugin");
String width_height = androidVideoPlugin.CallStatic<String>("GetVideoParams");

public void start(Context context, int externalTextureId) {
....
}

AndroidJavaObject androidVideoPlugin = new AndroidJavaObject("com.iqiyi.cutgreenvideosdk.VideoPlugin");
//get activity
 AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
            AndroidJavaObject activity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
            
 androidVideoPlugin.Call("start", activity, 1);

dependencies {
    compileOnly files('libs/classes.jar')
}

    private static String mGameObject = "";
    private static String mCallbackFunction = "";

    public static void checkPermission(Context context, String gameObject, String callbackFunction) {
        Log.i(TAG, "checkPermission gameObject " + gameObject + " callbackFunction " + callbackFunction);
        mGameObject = gameObject;
        mCallbackFunction = callbackFunction;
        //TODO 做实际处理，例如请求权限
    }

	//处理完事情，通过消息告诉Unity结果
    private static void notifyResult(boolean permissionGranted) {
        try {
            //参数1， 脚本挂载的gameObject名称，参数2， 脚本方法，参数3，返回值
            Log.w(TAG, "notifyResult, permissionGranted " + permissionGranted + " mGameObject " + mGameObject + " mCallbackFunction " + mCallbackFunction);
            UnityPlayer.UnitySendMessage(mGameObject, mCallbackFunction, permissionGranted ? "1" : "0");
            getInstance().mContext = null;
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void checkPermission()
    {
        Debug.Log(TAG + "checkPermission");
        AndroidJavaObject nativeObject = new AndroidJavaObject("com.iqiyi.cutgreenvideosdk.PermissionHelper");
        nativeObject.CallStatic("checkPermission", activity, "AndroidVideoScreen", "onPermissionResult");//AndroiwdVideoScreen 为脚本挂载的对象，onPermissionResult为脚本监听回调的函数名称 
    }

    public void onPermissionResult(String resultCode)
    {
       //TODO
    }