ByteArrayBuffer引发IndexOutOfBounds异常 - 无法获取原因

我通过LocalBroadcastManager在Android中接收ByteArray。它工作正常，但是我发送它大块。ByteArrayBuffer引发IndexOutOfBounds异常 - 无法获取原因

当我想合并回大块时，出现错误。

下面是代码：

else if (message.equals(BtConstants.BtStateUpdates.BT_UPDATE_STATE_RXRAW_COMPLETE.getString())) { 
    Log.i(TAG, "length [" + Integer.toString(picRaw.length()) + "]/capacity [" + Integer.toString(picRaw.capacity()) + "]"); 
    Log.i(TAG,"append" + Integer.toString(intent.getExtras().getByteArray(BtConstants.btBytePayload).length));    
    picRaw.append(intent.getExtras().getByteArray(BtConstants.btBytePayload), picRaw.length(), 
    intent.getExtras().getByteArray(BtConstants.btBytePayload).length);     
    String s = ""; 
    try { 
     s = new String(picRaw.buffer(), "US-ASCII"); 
    } catch (UnsupportedEncodingException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 
    Log.i(TAG, "RCVD RAW: " + s); 
}

这里是错误。首先注意它会附加较小的650字节，但在追加更大的值时会失败。

**10-25 11:21:40.670: I/BluetoothService(9537): length [0]/capacity [15000] 

10-25 11:21:40.675: I/BluetoothService(9537): append665** 

Works FINE so far 

10-25 11:21:40.680: V/BluetoothSocket.cpp(9537): readNative 

10-25 11:21:40.680: I/BluetoothService(9537): RCVD RAW: �..edited out for brevity.� 

10-25 11:21:40.680: D/BluetoothService(9537): Rcvd broadcast: com.test.ppt.bt_state_raw_connected 

**10-25 11:21:40.695: I/BluetoothService(9537): length [665]/capacity [15000] 

10-25 11:21:40.695: I/BluetoothService(9537): append5320 

10-25 11:21:40.695: D/AndroidRuntime(9537): Shutting down VM 

10-25 11:21:40.695: W/dalvikvm(9537): threadid=1: thread exiting with uncaught exception (group=0x40c3c1f8) 

10-25 11:21:40.730: E/AndroidRuntime(9537): FATAL EXCEPTION: main 

10-25 11:21:40.730: E/AndroidRuntime(9537): java.lang.IndexOutOfBoundsException** 

10-25 11:21:40.730: E/AndroidRuntime(9537):  at org.apache.http.util.ByteArrayBuffer.append(ByteArrayBuffer.java:68) 

10-25 11:21:40.730: E/AndroidRuntime(9537):  at com.test.ppt.btService.BluetoothService$1.onReceive(BluetoothService.java:217) 

10-25 11:21:40.730: E/AndroidRuntime(9537):  at android.support.v4.content.LocalBroadcastManager.executePendingBroadcasts(LocalBroadcastManager.java:297) 

10-25 11:21:40.730: E/AndroidRuntime(9537):  at android.support.v4.content.LocalBroadcastManager.access$000(LocalBroadcastManager.java:46) 

10-25 11:21:40.730: E/AndroidRuntime(9537):  at android.support.v4.content.LocalBroadcastManager$1.handleMessage(LocalBroadcastManager.java:116) 

10-25 11:21:40.730: E/AndroidRuntime(9537):  at android.os.Handler.dispatchMessage(Handler.java:99) 

10-25 11:21:40.730: E/AndroidRuntime(9537):  at android.os.Looper.loop(Looper.java:137) 

10-25 11:21:40.730: E/AndroidRuntime(9537):  at android.app.ActivityThread.main(ActivityThread.java:4507) 

10-25 11:21:40.730: E/AndroidRuntime(9537):  at java.lang.reflect.Method.invokeNative(Native Method) 

10-25 11:21:40.730: E/AndroidRuntime(9537):  at java.lang.reflect.Method.invoke(Method.java:511) 

10-25 11:21:40.730: E/AndroidRuntime(9537):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 

10-25 11:21:40.730: E/AndroidRuntime(9537):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 

10-25 11:21:40.730: E/AndroidRuntime(9537):  at dalvik.system.NativeStart.main(Native Method)

初始容量是15000--这应该足够了。

来源

2012-10-25 Radu

我想我找到了解决方案here。 ByteArrayBuffer.append的工作方式与我预期的不同。从这个新的文档引用：

空隙追加（烧焦[] B，诠释断，INT LEN）
 Appends len chars to this buffer from the given source array starting at index off. 

焦炭中的索引off启动[]湾追加总是在ByteArrayBuffer的末尾完成。

为此我的代码应该是这样的：

picRaw.append(intent.getExtras(). 
    getByteArray(BtConstants.btBytePayload), picRaw.length(), 
     intent.getExtras().getByteArray(BtConstants.btBytePayload).length);

来源

2012-10-25 10:28:29 Radu

try { 
       s = new String(picRaw.buffer(), "US-ASCII"); 
      } 
catch (ArrayIndexOutOfBoundsException e) { 
      // TODO: handle exception 
     } 
     catch (IndexOutOfBoundsException e) { 
      // TODO: handle exception 
     } 

catch (UnsupportedEncodingException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      }

我希望上面的代码能帮到你。

来源

2012-10-25 08:43:29

对不起代码之前只是失败！在.append调用中 – Radu

ByteArrayBuffer引发IndexOutOfBounds异常 - 无法获取原因

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