我正在编写以下代码：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
start();
}
public void start()
{
ScrollView device= (ScrollView) findViewById(R.id.test);
device.removeAllViews();
TableLayout deviceTable = new TableLayout(getApplicationContext());
deviceTable.setId(951357);
device.addView(deviceTable);
deviceList = new ArrayList<DeviceInformation>();
WifiManager wifi = (WifiManager)getSystemService( Context.WIFI_SERVICE );
if(wifi != null)
{
WifiManager.MulticastLock lock = wifi.createMulticastLock("WifiDevices");
lock.acquire();
}
WifiInfo wInfo = wifi.getConnectionInfo();
MAC = wInfo.getMacAddress();
sendMulticastFlyport = new Thread(new FlyportSender(MAC));
sendMulticastFlyport.start();
sendMulticastComputer = new Thread(new ComputerSender(MAC));
sendMulticastComputer.start();
sendMulticastRaspberryPi = new Thread(new RaspberrySender(MAC));
sendMulticastRaspberryPi.start();
new DeviceSearcher().execute();
}
private class DeviceSearcher extends AsyncTask<Void, DeviceInformation ,Void>
{
@Override
protected void onPreExecute()
{
super.onPreExecute();
TableLayout deviceTable = (TableLayout) findViewById(951357);
TableRow tr = new TableRow(getApplicationContext());
LayoutParams layout = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
tr.setLayoutParams(layout);
TextView tv = new TextView(getApplicationContext());
tv.setText("Searching");
tv.setTextColor(Color.BLACK);
tv.setVisibility(1);
tr.addView(tv);
deviceTable.addView(tr);
}
@Override
protected Void doInBackground(Void... arg0)
{
publishProgress((DeviceInformation)null);
new Thread()
{
public void run()
{
MulticastSocket socketComputer=null;
try
{
socketComputer = new MulticastSocket(WifiConstants.COMPUTER_RECV_PORT);
socketComputer.joinGroup(InetAddress.getByName(WifiConstants.COMPUTER_NETWORK_ADDR));
socketComputer.setSoTimeout(1*20*1000);
byte[] inBufComputer = new byte[1024];
DatagramPacket inPacketComputer = new DatagramPacket(inBufComputer, inBufComputer.length);
while(true)
{
System.out.println("Listening...");
socketComputer.receive(inPacketComputer);
System.out.println("Received");
String msg = new String(inBufComputer, 0, inPacketComputer.getLength());
DeviceInformation device = new DeviceInformation(1, msg, inPacketComputer.getAddress().toString());
publishProgress(device);
Log.v("Received:","Received Computer From :" + inPacketComputer.getAddress() + " Msg : " + msg);
//System.out.write(inPacket.getData(),0,inPacket.getLength());
System.out.println();
Thread.sleep(2000);
}
}
catch(Exception e)
{
Log.v("Exception:","During Receiving Computer: "+e.toString());
publishProgress((DeviceInformation)null);
}
finally
{
socketComputer.close();
}
}
}.start();
new Thread()
{
public void run()
{
MulticastSocket socketRaspberry=null;
try
{
socketRaspberry = new MulticastSocket(WifiConstants.RASPBERRY_RECV_PORT);
socketRaspberry.joinGroup(InetAddress.getByName(WifiConstants.RASPBERRY_NETWORK_ADDR));
socketRaspberry.setSoTimeout(1*20*1000);
byte[] inBufRaspberry = new byte[1024];
DatagramPacket inPacketRaspberry = new DatagramPacket(inBufRaspberry, inBufRaspberry.length);
while(true)
{
System.out.println("Listening...");
socketRaspberry.receive(inPacketRaspberry);
System.out.println("Received");
String msg = new String(inBufRaspberry, 0, inPacketRaspberry.getLength());
DeviceInformation device = new DeviceInformation(2, msg, inPacketRaspberry.getAddress().toString());
publishProgress(device);
Log.v("Received:","Received Raspberry From :" + inPacketRaspberry.getAddress() + " Msg : " + msg);
//System.out.write(inPacket.getData(),0,inPacket.getLength());
System.out.println();
Thread.sleep(1500);
}
}
catch(Exception e)
{
Log.v("Exception:","During Receiving Raspberry: "+e.toString());
publishProgress((DeviceInformation)null);
}
finally
{
socketRaspberry.close();
}
}
}.start();
}
@Override
protected void onProgressUpdate(DeviceInformation... d)
{
super.onProgressUpdate(d[0]);
LayoutParams layout = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
TableLayout deviceTable = (TableLayout) findViewById(951357);
if(check==false)
{
check=true;
Log.v("enter","removing all views");
System.out.println(deviceTable);
//deviceTable.removeAllViews();
}
DeviceInformation device = d[0];
if(device!=null)
{
deviceList.add(device);
TableRow tr = new TableRow(getApplicationContext());
CheckBox check = new CheckBox(getApplicationContext());
check.setText(device.getDeviceTypeString()+"\n"+device.getIPAddress());
check.setVisibility(1);
check.setId(14569+rowCounter);
check.setTextColor(Color.WHITE);
if(rowCounter%2==0)
{
tr.setBackgroundColor(Color.DKGRAY);
}
else
{
tr.setBackgroundColor(Color.GRAY);
}
check.setPadding(70, 0, 0, 0);
check.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View view)
{
CheckBox checkSee = (CheckBox) findViewById(view.getId());
}
});
switch(device.getDeviceType())
{
case 1:
check.setButtonDrawable(R.drawable.pcx);
break;
case 2:
check.setButtonDrawable(R.drawable.raspberryx);
break;
case 3:
check.setButtonDrawable(R.drawable.flyportx);
break;
}
check.setEnabled(true);
check.setChecked(false);
check.setLayoutParams(layout);
tr.addView(check);
tr.setLayoutParams(layout);
tr.setVisibility(1);
deviceTable.addView(tr);
rowCounter++;
}
else
{
if(deviceEndCounter==3)
{
TableRow tr = new TableRow(getApplicationContext());
TextView tv = new TextView(getApplicationContext());
tv.setText("No Devices Found");
tv.setVisibility(1);
tv.setLayoutParams(layout);
tv.setTextColor(Color.WHITE);
tr.setBackgroundColor(Color.BLACK);
tr.setVisibility(1);
tr.setLayoutParams(layout);
tr.addView(tv);
System.out.println(deviceTable);
deviceTable.addView(tr);
}
else
{
deviceEndCounter++;
}
}
}
}
上面的代码到达onProgressUpdate方法。并且还可以访问UI视图，但不要对UI进行任何更改。
但如果我要删除任何View，则会将其删除。但不添加任何视图。
我不知道该怎么做。我已经尝试了各种方法。
修改
我尝试使用TableLayout
System.out.println();
05-13 11:33:04.936: V/Exception:(16280): During Receiving Computer: java.net.SocketTimeoutException
05-13 11:33:04.946: V/Exception:(16280): During Receiving Raspberry: java.net.SocketTimeoutException
05-13 11:33:04.946: I/System.out(16280): android.widget.TableLayout@40dc32a8
05-13 11:33:04.956: V/Exception:(16280): During Receiving Flyport: java.net.SocketTimeoutException
05-13 11:33:04.976: V/Exception:(16280): During Receiving Computer: java.net.SocketTimeoutException
05-13 11:33:04.976: V/Exception:(16280): During Receiving Raspberry: java.net.SocketTimeoutException
05-13 11:33:04.986: V/Exception:(16280): During Receiving Flyport: java.net.SocketTimeoutException
05-13 11:33:05.016: I/System.out(16280): android.widget.TableLayout@40dc32a8
这是我的LogCat。
除此之外，只有三个主题正在运行，但我不知道每个TimeOutException我是如何获得thread的。{/ p>
答案 0 :(得分：0)
在上面，我正在使用
LayoutParams layout = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
TextView tv = new TextView(getApplicationContext());
tv.setLayoutParams(layout);
它不应包含：
tv.setLayoutParams(layout);