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문제가있어 해결책을 찾을 수 없습니다. 블루투스 연결을 통해 데이터를 수신하면 프로그램이 갑자기 작동하지 않습니다. 별도의 스레드에서 데이터를 수신하고 있습니다. 각 스레드는받은 바이트를 대기열에 저장합니다. 또한 1ms마다 큐에서 데이터를 읽는 메서드를 호출하는 TimerTask와 UI의 TextBox를 새로 고치는 TimerTask가 하나 있습니다. 내 프로그램은 잠시 동안 작동하지만 갑자기 충돌합니다. 도와주세요. 다음은 주요 코드 스 니펫입니다.Android : 잡히지 않은 예외로 종료하는 스레드
public class MainActivity extends Activity
{
TextView myLabel1;
volatile boolean stopWorker = false;
public Queue<Byte> receiverQueue = new LinkedList<Byte>();
protected byte[] receiverArray;
private boolean newDataRead = false;
//timer
TimerTask mTimerTask;
Timer timer = new Timer();
final Handler timerHandler = new Handler();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myLabel1 = (TextView)findViewById(R.id.textView1);
//start with timer ticking after 1 sec, and give timer tick every 1ms
onTimerTick();
timer.schedule(mTimerTask, 1000, 1);
}
//method for reading data from receiverQueue
protected void readDataFromReceiverBuffer() {
//if receiverQueue is not empty, read data
if(receiverQueue.isEmpty() == false) {
//declaration of byte array receiverField size of receiverQueue
receiverArray = new byte[receiverQueue.size()];
//read bytes from queue until is empty
for (int i = 0; receiverQueue.isEmpty() == false; i++) {
//retrieves and removes the head of this queue, or returns null
receiverArray[i] = receiverQueue.poll();
}
//variable newData is set to true, when we read new data from queue
newDataRead = true;
}
}
Thread dataReceiveThread = new Thread(new Runnable() {
//received byte
int receivedData;
public void run() {
while(!Thread.currentThread().isInterrupted() && !stopWorker) {
try {
//read one byte from InputStream
receivedData = mmInStream.read();
//inserts received byte into this queue if it is possible
if(receivedData != -1)
receiverQueue.offer((byte)receivedData);
}
catch (IOException ex) {
stopWorker = true;
}
//Log.i(String.valueOf(receivedData), "valueOfReceivedData");
}
}
});
public void onTimerTick() {
mTimerTask = new TimerTask() {
String temp;
//this method is called
public void run() {
//call method for read data from queue
readDataFromReceiverBuffer();
timerHandler.post(new Runnable() {
public void run() {
//when new data has arrived, we update UI
if(newDataRead == true) {
//convert byte array to string
temp = new String(receiverArray, 0, receiverArray.length);
myLabel1.setText(temp);
newDataRead = false;
}
}
});
}};
}
로그 캣 :
W/dalvikvm(12358): threadid=11: thread exiting with uncaught exception (group=0x40ab1210)
E/AndroidRuntime(12358): FATAL EXCEPTION: Timer-0
E/AndroidRuntime(12358): java.lang.ArrayIndexOutOfBoundsException: length=21; index=21
E/AndroidRuntime(12358): at com.example.colibri2bb.MainActivity.readDataFromReceiverBuffer(MainActivity.java:195)
E/AndroidRuntime(12358): at com.example.colibri2bb.MainActivity.readDataFromReceiverBuffer(MainActivity.java:195)
E/AndroidRuntime(12358): at com.example.colibri2bb.MainActivity$3.run(MainActivity.java:230)
E/AndroidRuntime(12358): at java.util.Timer$TimerImpl.run(Timer.java:284)
로그 캣 :
W/dalvikvm(17344): threadid=12: thread exiting with uncaught exception (group=0x40ab1210)
E/AndroidRuntime(17344): FATAL EXCEPTION: Timer-1
E/AndroidRuntime(17344): java.util.NoSuchElementException
E/AndroidRuntime(17344): atjava.util.LinkedList.removeFirstImpl(LinkedList.java:689)
E/AndroidRuntime(17344): at java.util.LinkedList.removeFirst(LinkedList.java:676)
E/AndroidRuntime(17344): at java.util.LinkedList.poll(LinkedList.java:895)
E/AndroidRuntime(17344):atcom.example.colibri2bb.MainActivity.readDataFromReceiverBuffer(MainActivity.java:196)
E/AndroidRuntime(17344): atcom.example.colibri2bb.MainActivity$3.run(MainActivity.java:231)
E/AndroidRuntime(17344): at java.util.Timer$TimerImpl.run(Timer.java:284)
logcat을 게시하시기 바랍니다. – thepoosh
변수 newDataRead가 volatile로 선언되어 있어야합니다. – Kishore
어느 라인이 195입니까? –