<分区>
如何在线程中添加 toast 方法。我想通过将 system.out 替换为 toast 方法来将结果显示到显示器来进行调试。
我知道在线程中使用应用程序上下文，就像这样: Toast.makeText(getApplicationContext(), "help", Toast.LENGTH_LONG).show(); 不管用。
我不知道如何将 Runnable 与 Toast 调用一起使用并从 Thread 调用 runOnUiThread(runnable)
谁能帮帮我。
public class NetworkServer extends Thread
{
DatagramSocket mSocket = null;
boolean isFinish = false;
private SimplestPossibleActivity activity;
public NetworkServer(SimplestPossibleActivity activity)
{
this.activity = activity;
}
public void run()
{
try
{
Log.d("UDP", "Listening");
mSocket = new DatagramSocket( 2010); //4444
mSocket.setBroadcast(true);
while (!isFinish)
{
Log.d("UDP", "C: socket create success");
byte[] recvbuffer = new byte[12];
DatagramPacket packet = new DatagramPacket(recvbuffer,recvbuffer.length);
Log.d("UDP", "receiving...");
mSocket.receive(packet);
Log.d("UDP", "received packet");
ByteBuffer bb = ByteBuffer.allocate(recvbuffer.length).order(ByteOrder.LITTLE_ENDIAN);
bb.put(recvbuffer);
bb.rewind();
//System.out.println(bb.getFloat());
//System.out.println(bb.getFloat());
//System.out.println(bb.getFloat());
Bundle data = new Bundle();
data.putFloat("latitude", bb.getFloat());
data.putFloat("longitude", bb.getFloat());
data.putFloat("altitude", bb.getFloat());
Message msgHandle = new Message();
msgHandle.setData(data);
mhandler.sendMessage(msgHandle);
} //end while
} catch (Exception e) {
Log.e("UDP", "C: Error", e);
}
}
private Handler mhandler = new Handler()
{
@Override
public void handleMessage(Message msg)
{
Bundle data = msg.getData();
Log.d("NetworkServer","adding position" + "lat = " + data.getFloat("latitude") +
"lon = " + data.getFloat("longitude") +
"alt = " + data.getFloat("altitude"));
activity.addPosition(data.getFloat("latitude"),
data.getFloat("longitude"),
data.getFloat("altitude"));
}
};
}