[ANE]開發Adobe Air ANE - Part 3:FREContext dispatchStatusEventAsync

前面的 [ANE]開發Adobe Air ANE - Part 2:Android AlertDialog功能
有介紹到ANE中AS3如何呼叫Android原生功能的基本做法,
而這次會介紹的為如何由原生功能透過ANE來呼叫AS3.


想要呼叫回AS3需透過

dispatchStatusEventAsync( String code, String level )

下面依照 Part 2 為例來修改,增加關閉確認視窗後的callback.

AlertFREFunction.java

package extension.myfirstandroidane;

import android.app.AlertDialog;
import android.content.DialogInterface;

import com.adobe.fre.FREContext;
import com.adobe.fre.FREFunction;
import com.adobe.fre.FREObject;

public class AlertFREFunction implements FREFunction {

    @Override
    public FREObject call(final FREContext freContext, FREObject[] freObjects) {

        String title = "title";
        String alertMessage = "alertMessage";
        String buttonLabel = "ok";
        try {
            alertMessage = freObjects[0].getAsString();
            title = freObjects[1].getAsString();
        } catch (Exception e) {
        }

        new AlertDialog.Builder(freContext.getActivity())
            .setTitle(title)
            .setMessage(alertMessage)
            .setPositiveButton(buttonLabel, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    freContext.dispatchStatusEventAsync("close alert", "onComplete");
                }
            }).show();
        return null;
    }
}

AndroidAlert.as

package zpl.extension 
{
    import flash.events.StatusEvent;
    import flash.external.ExtensionContext;

    public class AndroidAlert 
    {
        private static var _instance:AndroidAlert;
        public static function get instance():AndroidAlert
        {
            if(_instance == null)
            {
                _instance = new AndroidAlert();
            }
            return _instance;
        }
        
        private var _extension:ExtensionContext;
        private var _callback:Function;
        
        public function AndroidAlert() 
        {
            _extension = ExtensionContext.createExtensionContext( "zpl.ane.alert", "" );
        }
        
        public function show(msg:String,title:String,callback:Function):void
        {
            _callback = callback;
            _extension.call("alertDialog",msg,title);
        }
        
        private function onStatus(e:StatusEvent):void 
        {
            switch (e.level) 
            {
                case "onComplete":
                    if (_callback != null)
                    {
                        _callback(); // e.code = "close alert"
                        _callback = null;
                    }
                break;
                default:
            }
        }
    }
}

參考資料

Adobe Flash Platform * FREContext