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ZXing集成在Android應用程序（包括PhoneGap）

2011-04-13 37 views
0

我想使用ZXing解碼我的Android應用程序中的條形碼。我正在使用Phonegap構建應用程序。現在我想整合ZXing來掃描條形碼並在我的應用程序中處理結果。我正在使用Android 2.1 - update1 SDK。ZXing集成在Android應用程序（包括PhoneGap）

首先，我綜合我的應用程序下面的類：

  • IntentIntegrator.java
  • IntentResult.java

然後，我創建了一個名爲 「Scanactivity」，其內容如下活動：

import android.app.Activity; 
import android.content.Intent; 
import com.google.zxing.integration.android.IntentIntegrator; 
import com.google.zxing.integration.android.IntentResult; 
public class ScanActivity extends Activity { 
    public void scanCode() { 
    IntentIntegrator.initiateScan(ScanActivity.this); 
    } 
    public void onActivityResult(int requestCode, int resultCode, Intent intent) { 
    IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent); 
    if (scanResult != null) { 
     // handle scan result 
    } 
    // else continue with any other code you need in the method 
    } 
}

在視圖中，我放置了一個按鈕，它調用s通過按下canCode（）方法。

$("#button_scan").click(function(e) { 
    ScanActivity.scanCode(); 
});

我在目標設備上安裝了應用程序「Barcode Scanner（ZXing）」以使用intent函數。如果我在我的應用程序中按下掃描按鈕，應用程序會崩潰並關閉。我的錯誤是什麼？

這裏是logcat的：

04-13 10:20:46.636: WARN/dalvikvm(2525): JNI WARNING: DeleteLocalRef(0x44caf3c0) failed to find entry (valid=1) 
04-13 10:20:46.636: WARN/dalvikvm(2525): JNI WARNING: DeleteLocalRef(0x44caf3c0) failed to find entry (valid=1) 
04-13 10:20:46.636: ERROR/dalvikvm(2525): Class lookup Landroid/webkit/WebHistoryItem; attemped while exception Ljava/lang/NullPointerException; pending 
04-13 10:20:46.636: INFO/dalvikvm(2525): DALVIK THREADS: 
04-13 10:20:46.636: INFO/dalvikvm(2525): "main" prio=5 tid=3 WAIT 
04-13 10:20:46.636: INFO/dalvikvm(2525): | group="main" sCount=0 dsCount=0 s=N obj=0x4001e250 self=0xbe30 
04-13 10:20:46.636: INFO/dalvikvm(2525): | sysTid=2525 nice=0 sched=0/0 cgrp=unknown handle=-1344001356 
04-13 10:20:46.636: INFO/dalvikvm(2525): at java.lang.Object.wait(Native Method) 
04-13 10:20:46.636: INFO/dalvikvm(2525): - waiting on <0x2488a8> (a android.os.MessageQueue) 
04-13 10:20:46.636: INFO/dalvikvm(2525): at java.lang.Object.wait(Object.java:288) 
04-13 10:20:46.636: INFO/dalvikvm(2525): at android.os.MessageQueue.next(MessageQueue.java:148) 
04-13 10:20:46.636: INFO/dalvikvm(2525): at android.os.Looper.loop(Looper.java:110) 
04-13 10:20:46.636: INFO/dalvikvm(2525): at android.app.ActivityThread.main(ActivityThread.java:4363) 
04-13 10:20:46.636: INFO/dalvikvm(2525): at java.lang.reflect.Method.invokeNative(Native Method) 
04-13 10:20:46.636: INFO/dalvikvm(2525): at java.lang.reflect.Method.invoke(Method.java:521) 
04-13 10:20:46.636: INFO/dalvikvm(2525): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
04-13 10:20:46.636: INFO/dalvikvm(2525): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
04-13 10:20:46.636: INFO/dalvikvm(2525): at dalvik.system.NativeStart.main(Native Method) 
04-13 10:20:46.646: INFO/dalvikvm(2525): "http3" prio=5 tid=31 WAIT 
04-13 10:20:46.646: INFO/dalvikvm(2525): | group="main" sCount=0 dsCount=0 s=N obj=0x44c970a8 self=0x296f40 
04-13 10:20:46.646: INFO/dalvikvm(2525): | sysTid=2544 nice=1 sched=0/0 cgrp=unknown handle=2715736 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Object.wait(Native Method) 
04-13 10:20:46.646: INFO/dalvikvm(2525): - waiting on <0x28cff0> (a android.net.http.RequestQueue) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Object.wait(Object.java:288) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at android.net.http.ConnectionThread.run(ConnectionThread.java:98) 
04-13 10:20:46.646: INFO/dalvikvm(2525): "http2" prio=5 tid=29 WAIT 
04-13 10:20:46.646: INFO/dalvikvm(2525): | group="main" sCount=0 dsCount=0 s=N obj=0x44c96e58 self=0x294f00 
04-13 10:20:46.646: INFO/dalvikvm(2525): | sysTid=2543 nice=1 sched=0/0 cgrp=unknown handle=2707480 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Object.wait(Native Method) 
04-13 10:20:46.646: INFO/dalvikvm(2525): - waiting on <0x28cff0> (a android.net.http.RequestQueue) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Object.wait(Object.java:288) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at android.net.http.ConnectionThread.run(ConnectionThread.java:98) 
04-13 10:20:46.646: INFO/dalvikvm(2525): "http1" prio=5 tid=27 WAIT 
04-13 10:20:46.646: INFO/dalvikvm(2525): | group="main" sCount=0 dsCount=0 s=N obj=0x44c96ba0 self=0x294cf8 
04-13 10:20:46.646: INFO/dalvikvm(2525): | sysTid=2542 nice=1 sched=0/0 cgrp=unknown handle=2706960 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Object.wait(Native Method) 
04-13 10:20:46.646: INFO/dalvikvm(2525): - waiting on <0x28cff0> (a android.net.http.RequestQueue) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Object.wait(Object.java:288) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at android.net.http.ConnectionThread.run(ConnectionThread.java:98) 
04-13 10:20:46.646: INFO/dalvikvm(2525): "http0" prio=5 tid=25 WAIT 
04-13 10:20:46.646: INFO/dalvikvm(2525): | group="main" sCount=0 dsCount=0 s=N obj=0x44c96990 self=0x294be0 
04-13 10:20:46.646: INFO/dalvikvm(2525): | sysTid=2541 nice=1 sched=0/0 cgrp=unknown handle=2667208 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Object.wait(Native Method) 
04-13 10:20:46.646: INFO/dalvikvm(2525): - waiting on <0x28cff0> (a android.net.http.RequestQueue) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Object.wait(Object.java:288) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at android.net.http.ConnectionThread.run(ConnectionThread.java:98) 
04-13 10:20:46.646: INFO/dalvikvm(2525): "Thread-12" prio=5 tid=23 TIMED_WAIT 
04-13 10:20:46.646: INFO/dalvikvm(2525): | group="main" sCount=0 dsCount=0 s=N obj=0x44c7b460 self=0x261498 
04-13 10:20:46.646: INFO/dalvikvm(2525): | sysTid=2540 nice=0 sched=0/0 cgrp=unknown handle=2375456 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Object.wait(Native Method) 
04-13 10:20:46.646: INFO/dalvikvm(2525): - waiting on <0x2444b0> (a com.phonegap.DroidGap$1$1) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Object.wait(Object.java:326) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at com.phonegap.DroidGap$1$1.run(DroidGap.java:387) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Thread.run(Thread.java:1096) 
04-13 10:20:46.646: INFO/dalvikvm(2525): "Thread-11" prio=5 tid=21 NATIVE 
04-13 10:20:46.646: INFO/dalvikvm(2525): | group="main" sCount=0 dsCount=0 s=N obj=0x44c7af48 self=0x262998 
04-13 10:20:46.646: INFO/dalvikvm(2525): | sysTid=2539 nice=0 sched=0/0 cgrp=unknown handle=2333912 
04-13 10:20:46.646: INFO/dalvikvm(2525): at org.apache.harmony.luni.platform.OSNetworkSystem.acceptSocketImpl(Native Method) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at org.apache.harmony.luni.platform.OSNetworkSystem.accept(OSNetworkSystem.java:69) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at org.apache.harmony.luni.net.PlainSocketImpl.accept(PlainSocketImpl.java:126) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.net.ServerSocket.implAccept(ServerSocket.java:285) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.net.ServerSocket.accept(ServerSocket.java:164) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at com.phonegap.CallbackServer.run(CallbackServer.java:185) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Thread.run(Thread.java:1096) 
04-13 10:20:46.646: INFO/dalvikvm(2525): "CookieSyncManager" prio=5 tid=19 TIMED_WAIT 
04-13 10:20:46.646: INFO/dalvikvm(2525): | group="main" sCount=0 dsCount=0 s=N obj=0x44c68588 self=0x127408 
04-13 10:20:46.646: INFO/dalvikvm(2525): | sysTid=2538 nice=10 sched=0/0 cgrp=unknown handle=1220392 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Object.wait(Native Method) 
04-13 10:20:46.646: INFO/dalvikvm(2525): - waiting on <0x23b538> (a android.os.MessageQueue) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at java.lang.Object.wait(Object.java:326) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at android.os.MessageQueue.next(MessageQueue.java:144) 
04-13 10:20:46.646: INFO/dalvikvm(2525): at android.os.Looper.loop(Looper.java:110) 
04-13 10:20:46.656: INFO/dalvikvm(2525): at android.webkit.WebSyncManager.run(WebSyncManager.java:90) 
04-13 10:20:46.656: INFO/dalvikvm(2525): at java.lang.Thread.run(Thread.java:1096) 
04-13 10:20:46.656: INFO/dalvikvm(2525): "WebViewCoreThread" prio=5 tid=17 RUNNABLE 
04-13 10:20:46.656: INFO/dalvikvm(2525): | group="main" sCount=0 dsCount=0 s=N obj=0x44cself=0x136478 
04-13 10:20:46.656: INFO/dalvikvm(2525): | sysTid=2535 nice=0 sched=0/0 cgrp=unknown handle=1339552 
04-13 10:20:46.656: INFO/dalvikvm(2525): at android.webkit.WebViewCore.nativeTouchUp(Native Method) 
04-13 10:20:46.656: INFO/dalvikvm(2525): at android.webkit.WebViewCore.access$3400(WebViewCore.java:48) 
04-13 10:20:46.656: INFO/dalvikvm(2525): at android.webkit.WebViewCore$EventHub$1.handleMessage(WebViewCore.java:1094) 
04-13 10:20:46.656: INFO/dalvikvm(2525): at android.os.Handler.dispatchMessage(Handler.java:99) 
04-13 10:20:46.656: INFO/dalvikvm(2525): at android.os.Looper.loop(Looper.java:123) 
04-13 10:20:46.656: INFO/dalvikvm(2525): at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:611) 
04-13 10:20:46.656: INFO/dalvikvm(2525): at java.lang.Thread.run(Thread.java:1096) 
04-13 10:20:46.656: INFO/dalvikvm(2525): "Binder Thread #3" prio=5 tid=15 NATIVE 
04-13 10:20:46.656: INFO/dalvikvm(2525): | group="main" sCount=0 dsCount=0 s=N obj=0x44c530e8 self=0x130c70 
04-13 10:20:46.656: INFO/dalvikvm(2525): | sysTid=2534 nice=0 sched=0/0 cgrp=unknown handle=1354864 
04-13 10:20:46.656: INFO/dalvikvm(2525): at dalvik.system.NativeStart.run(Native Method) 
04-13 10:20:46.656: INFO/dalvikvm(2525): "Binder Thread #2" prio=5 tid=13 NATIVE 
04-13 10:20:46.656: INFO/dalvikvm(2525): | group="main" sCount=0 dsCount=0 s=N obj=0x44c53028 self=0x1269e0 
04-13 10:20:46.656: INFO/dalvikvm(2525): | sysTid=2533 nice=0 sched=0/0 cgrp=unknown handle=1383744 
04-13 10:20:46.656: INFO/dalvikvm(2525): at dalvik.system.NativeStart.run(Native Method) 
04-13 10:20:46.656: INFO/dalvikvm(2525): "Binder Thread #1" prio=5 tid=11 NATIVE 
04-13 10:20:46.656: INFO/dalvikvm(2525): | group="main" sCount=0 dsCount=0 s=N obj=0x44c4dc50 self=0x132840 
04-13 10:20:46.656: INFO/dalvikvm(2525): | sysTid=2532 nice=0 sched=0/0 cgrp=unknown handle=1354576 
04-13 10:20:46.656: INFO/dalvikvm(2525): at dalvik.system.NativeStart.run(Native Method) 
04-13 10:20:46.656: INFO/dalvikvm(2525): "JDWP" daemon prio=5 tid=9 VMWAIT 
04-13 10:20:46.656: INFO/dalvikvm(2525): | group="system" sCount=0 dsCount=0 s=N obj=0x44c4c2a0 self=0x14e0f0 
04-13 10:20:46.656: INFO/dalvikvm(2525): | sysTid=2529 nice=0 sched=0/0 cgrp=unknown handle=1135864 
04-13 10:20:46.656: INFO/dalvikvm(2525): at dalvik.system.NativeStart.run(Native Method) 
04-13 10:20:46.656: INFO/dalvikvm(2525): "Signal Catcher" daemon prio=5 tid=7 VMWAIT 
04-13 10:20:46.656: INFO/dalvikvm(2525): | group="system" sCount=0 dsCount=0 s=N obj=0x44c4c1e8 self=0x1127b0 
04-13 10:20:46.656: INFO/dalvikvm(2525): | sysTid=2528 nice=0 sched=0/0 cgrp=unknown handle=1338232 
04-13 10:20:46.656: INFO/dalvikvm(2525): at dalvik.system.NativeStart.run(Native Method) 
04-13 10:20:46.656: INFO/dalvikvm(2525): "HeapWorker" daemon prio=5 tid=5 VMWAIT 
04-13 10:20:46.656: INFO/dalvikvm(2525): | group="system" sCount=0 dsCount=0 s=N obj=0x43562ed8 self=0x12b268 
04-13 10:20:46.656: INFO/dalvikvm(2525): | sysTid=2526 nice=0 sched=0/0 cgrp=unknown handle=1355192 
04-13 10:20:46.656: INFO/dalvikvm(2525): at dalvik.system.NativeStart.run(Native Method) 
04-13 10:20:46.656: ERROR/dalvikvm(2525): VM aborting

這是堆棧：

ScanActivity.scanCode() line: 12  
    IntentIntegrator.initiateScan(ScanActivity.this); 

Activity.class: 
    ScanActivity(Activity).startActivityForResult(Intent, int) line: 2749 

Reference.class: 
    WeakReference(Reference).get() line: 147

然後該應用終止。

來源

2011-04-13 el.chueko

+0

什麼異常會導致應用程序崩潰？你看過Logcat嗎？ – 2011-04-13 12:20:52

+0

我將附加到帖子 – 2011-04-13 12:41:52

+0

這不是LogCat。或者，至少，它不是來自您的異常的Java堆棧跟蹤。 – CommonsWare 2011-04-13 12:51:43

回答

2

查看PhoneGap條形碼教程here。它將帶您一步一步通過purplecabbage的PhoneGap插件創建帶zxing的示例應用程序。

來源

2011-05-08 16:03:02

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