7
Tôi hoàn toàn mới phát triển với Android SDK. Tôi đang cố gắng để bắt đầu Adobe Reader từ một phần mở rộng bản địa cho AIR (trên Android).Bắt đầu hoạt động từ tiện ích mở rộng gốc Adobe AIR dành cho Android
Đây là những gì tôi đã làm (tôi đã làm theo hướng dẫn này: http://www.adobe.com/devnet/air/articles/extending-air.html).
Tôi có một điều khiển:
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 {
}
Và đây là openPdf của tôi() chức năng:
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;
}
}
Vấn đề là khi chạy, tôi nhận được một NPE (trên 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)
Tôi tin rằng cách tôi cố bắt đầu trình đọc adobe không phải là điều tốt nhưng tôi đã làm gì sai?
Cảm ơn trước sự giúp đỡ của bạn!
Zab