7
Sono completamente nuovo nello sviluppo con Android SDK. Sto cercando di avviare Adobe Reader da un'estensione nativa per AIR (su Android).Avvia attività dall'estensione nativa di Adobe AIR per Android
Ecco cosa ho fatto (ho seguito questo tutorial: http://www.adobe.com/devnet/air/articles/extending-air.html).
ho un controller:
package com.tokom.adobereader
{
import com.tokom.adobereader.events.AdobeReaderEvent;
import flash.events.EventDispatcher;
import flash.events.StatusEvent;
import flash.external.ExtensionContext;
/**
* A controller used to interact with the system volume on iOS and
* Android devices. Ways to change the volume programmatically
* and to respond to the hardware volume buttons are included.
*
* @author Nathan Weber
*/
public class AdobeReaderController extends EventDispatcher
{
//----------------------------------------
//
// Variables
//
//----------------------------------------
private static var _instance:AdobeReaderController;
private var extContext:ExtensionContext;
//----------------------------------------
//
// Public Methods
//
//----------------------------------------
public static function get instance():AdobeReaderController {
if (!_instance) {
_instance = new AdobeReaderController(new SingletonEnforcer());
_instance.init();
}
return _instance;
}
public function openPdf(path:String):void
{
trace("[AdobeReaderController.as] openPdf "+path);
var ret = extContext.call("openPdf", path);
trace("ret = "+ret);
}
/**
* Cleans up the instance of the native extension.
*/
public function dispose():void {
extContext.dispose();
}
//----------------------------------------
//
// Handlers
//
//----------------------------------------
private function init():void {
trace("[AdobeReaderController.as] init");
extContext.call("init");
}
//----------------------------------------
//
// Handlers
//
//----------------------------------------
private function onStatus(event:StatusEvent):void {
//systemVolume = Number(event.level);
//dispatchEvent(new VolumeEvent(VolumeEvent.VOLUME_CHANGED, systemVolume, false, false));
}
//----------------------------------------
//
// Constructor
//
//----------------------------------------
/**
* Constructor.
*/
public function AdobeReaderController(enforcer:SingletonEnforcer) {
super();
extContext = ExtensionContext.createExtensionContext("com.tokom.adobereader", "");
if (!extContext) {
trace("Adobe Reader native extension is not supported on this platform.");
throw new Error("Adobe Reader native extension is not supported on this platform.");
}
//extContext.addEventListener(StatusEvent.STATUS, onStatus);
}
}
}
class SingletonEnforcer {
}
E qui è il mio openPdf) Funzione (:
package com.tokom.adobereader.functions;
import java.io.File;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.net.Uri;
import android.util.Log;
import com.adobe.fre.FREContext;
import com.adobe.fre.FREFunction;
import com.adobe.fre.FREObject;
public class OpenPdfFunction extends Activity implements FREFunction
{
public static final String TAG = "OpenPdfFunction";
public FREObject call(FREContext context, FREObject[] args)
{
Log.d(TAG, "open pdf = ");
String filePath = null;
try
{
filePath = args[0].getAsString();
Log.d(TAG, filePath);
} catch (Exception e) {
// TODO
}
Log.d(TAG, "trying now to open adobeReader");
try
{
Intent intent = new Intent();
//intent.setClassName("com.adobe.reader", "com.adobe.reader.AdobeReader");
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(filePath)), "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
Log.d(TAG, "about to startActivity");
startActivity(intent);
}
catch (ActivityNotFoundException activityNotFoundException)
{
Log.d(TAG, "cannot start activity");
activityNotFoundException.printStackTrace();
}
catch (Exception otherException)
{
otherException.printStackTrace();
Log.d(TAG, "cannot start activity");
}
Log.d(TAG, "activity should have started");
return null;
}
}
Il problema è che in fase di esecuzione, ottengo un NPE (su startActivity()):
10-18 18:31:44.160: I/InputReader(289): dispatchTouch::touch event's action is 0, pending(waiting finished signal)=0
10-18 18:31:44.160: I/InputDispatcher(289): Delivering touch to current input target: action: 0, channel '40b0d0b0 air.testMyANE.debug/air.testMyANE.debug.AppEntry (server)'
10-18 18:31:44.160: I/InputDispatcher(289): Delivering touch to current input target: action: 0, channel 'TouchIntercepter (server)'
10-18 18:31:44.280: I/InputReader(289): dispatchTouch::touch event's action is 1, pending(waiting finished signal)=0
10-18 18:31:44.280: I/InputDispatcher(289): Delivering touch to current input target: action: 1, channel '40b0d0b0 air.testMyANE.debug/air.testMyANE.debug.AppEntry (server)'
10-18 18:31:44.280: I/InputDispatcher(289): Delivering touch to current input target: action: 1, channel 'TouchIntercepter (server)'
10-18 18:31:44.310: D/AdobeReaderExtension(28990): Extension initialized.
10-18 18:31:44.310: I/air.testMyANE.debug(28990): [AdobeReaderController.as] init
10-18 18:31:44.320: I/InitFunction(28990): in init
10-18 18:31:44.320: I/air.testMyANE.debug(28990): [AdobeReaderController.as] openPdf /sdcard/Download/test.pdf
10-18 18:31:44.320: D/OpenPdfFunction(28990): open pdf =
10-18 18:31:44.320: D/OpenPdfFunction(28990): /sdcard/Download/test.pdf
10-18 18:31:44.320: D/OpenPdfFunction(28990): trying now to open adobeReader
10-18 18:31:44.320: D/OpenPdfFunction(28990): about to startActivity
10-18 18:31:44.320: W/System.err(28990): java.lang.NullPointerException
10-18 18:31:44.320: W/System.err(28990): at android.app.Activity.startActivityForResult(Activity.java:3095)
10-18 18:31:44.320: W/System.err(28990): at android.app.Activity.startActivity(Activity.java:3201)
10-18 18:31:44.320: W/System.err(28990): at com.tokom.adobereader.functions.OpenPdfFunction.call(OpenPdfFunction.java:69)
10-18 18:31:44.320: W/System.err(28990): at com.adobe.air.customHandler.nativeOnTouchCallback(Native Method)
10-18 18:31:44.320: W/System.err(28990): at com.adobe.air.customHandler.nativeOnTouchCallback(Native Method)
10-18 18:31:44.320: W/System.err(28990): at com.adobe.air.customHandler.handleMessage(customHandler.java:27)
10-18 18:31:44.320: W/System.err(28990): at android.os.Handler.dispatchMessage(Handler.java:99)
10-18 18:31:44.320: W/System.err(28990): at android.os.Looper.loop(Looper.java:132)
10-18 18:31:44.320: W/System.err(28990): at android.app.ActivityThread.main(ActivityThread.java:4028)
10-18 18:31:44.320: W/System.err(28990): at java.lang.reflect.Method.invokeNative(Native Method)
10-18 18:31:44.320: W/System.err(28990): at java.lang.reflect.Method.invoke(Method.java:491)
10-18 18:31:44.320: W/System.err(28990): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844)
10-18 18:31:44.320: W/System.err(28990): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
10-18 18:31:44.320: W/System.err(28990): at dalvik.system.NativeStart.main(Native Method)
credo che il mio modo di' provare ad avviare adobe reader non è quello buono, ma quello che ho fatto di sbagliato?
Grazie in anticipo per il vostro aiuto!
Zab