Android ByteArrayBuffer引发IndexOutOfBounds异常-无法获取原因
我正在通过LocalBroadcastManager接收Android的ByteArray。它工作得很好,但我发送它在块 当我想要合并回块时,我得到一个错误 代码如下:Android ByteArrayBuffer引发IndexOutOfBounds异常-无法获取原因,android,bytearray,byte,indexoutofboundsexception,Android,Bytearray,Byte,Indexoutofboundsexception,我正在通过LocalBroadcastManager接收Android的ByteArray。它工作得很好,但我发送它在块 当我想要合并回块时,我得到一个错误 代码如下: else if (message.equals(BtConstants.BtStateUpdates.BT_UPDATE_STATE_RXRAW_COMPLETE.getString())) { Log.i(TAG, "length [" + Integer.toString(picRaw.length()) + "]
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。请注意,它首先会附加较小的650字节,但当附加较大的值时会失败
**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)
初始容量为15000—这应该足够了
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助你 我想我找到了解决办法。 append的工作方式与我预期的不同。 引用此新文档: 无效附加(字符[]b,整数关闭,整数长度) 从字符[]b中的索引off开始。追加始终在ByteArrayBuffer的末尾完成 因此,我的代码应该如下所示:
picRaw.append(intent.getExtras().
getByteArray(BtConstants.btBytePayload), picRaw.length(),
intent.getExtras().getByteArray(BtConstants.btBytePayload).length);
picRaw.append(intent.getExtras().
getByteArray(BtConstants.btBytePayload), picRaw.length(),
intent.getExtras().getByteArray(BtConstants.btBytePayload).length);