Android的蓝牙应用程序反应迟钝
问题描述:
我有通过异步任务 蓝牙设备,如果我收到一个电话,在通话过程中我回应用 屏幕变暗和应用程序没有响应 回通信的应用按钮不起作用...并没有显示ANR对话框 有什么想法?Android的蓝牙应用程序反应迟钝
这里是处理连接的代码:
@Override
protected Object doInBackground(Object... params) {
//boolean protocolUpdated;
int read = 0; // The amount of bytes read from the socket.
byte[] buff = new byte[MessageHandler.BUFFERSIZE]; // The data buffer.
byte[] tmpSend = null; // Misc bytes arrays returned from ProtocolParser as answers to send after decoding calls.
in = null;
out = null;
try {
if (Float.parseFloat(version) > 2.2){
Method m = dev.getClass().getMethod("createRfcommSocket", new Class[] {int.class});
sock = (BluetoothSocket) m.invoke(dev, 1);
}
else sock = dev.createRfcommSocketToServiceRecord(UUID_RFCOMM_GENERIC); // UUID is constant for serial BT devices.
sock.connect(); // connect to the BT device. This is rather heavy, may take 3 secs.
sendMessage(MESSAGE_CONNECTION_ESTABLISHED);
in = sock.getInputStream();
out = sock.getOutputStream();
timer = new Timer();
startFinishTimer(); //initialize finish timer
while(read != -1) { // read = -1 means EOF.
do { // as long as there is anything to send in the send queue - send it.
tmpSend = parser.nextSend();
if(tmpSend != null){
String msg = parseMessage(tmpSend);
Log.d("Writing:",msg);
out.write(tmpSend);
}
} while(tmpSend != null);
read = in.read(buff); // read. This is a blocking call, to break this, interrupt the thread.
timer.cancel();
startFinishTimer(); //read is a blocking call so timer should be restarted only after read bytes.
parser.parse(buff,read); // parse the read message using the logic in the ProtocolParser derived class.
tmpSend = parser.getPool(); // if pool ack is required - send it.
if (tmpSend != null){
Log.d("Writing:",parseMessage(tmpSend));
out.write(tmpSend);
}
if (read != 0){
Log.d("Read:",parseMessage(buff));
tmpSend = parser.getAnswer(); // if answer is required (based on message) - send it.
if(tmpSend != null){
out.write(tmpSend);
}
}
else {
Exception e = new IOException();
throw e;
}
}
}catch (IOException e){
e.printStackTrace();
Log.d("Connection: ", "Bluetooth Connection CRASHED!");
sendMessage(MESSAGE_CONNECTION_LOST);
}catch (Exception e){
e.printStackTrace();
}
return null;
}
答
其实没有足够的上下文来找到你的问题。
确保您从主线程启动此任务在其他情况下PostExecute将附加到错误的线程,您可以得到一场比赛。
确保您不会向代码中的多个处理程序发送相同的消息。 消息这是一个链表,你可能会得到ANR在这种情况下。
获取/data/anr/traces.txt以确保它不是ANR。
您可以在文件的开头按时间进行确认。
谢谢你的答复谢尔盖。我不确定你是否注意到,但这个问题在两年前接近问。不幸的是,这个项目在一段时间前完成了,告诉你实话,我甚至不记得最后有什么问题...... – zwebie 2013-11-06 16:22:10