Madhu Nandan

Hi,

I have a strange problem. In the strings.xml file of my project, the first line is <?xml version="1.0" encoding="utf-8"?> But every time I close and open the file, the first line changes automatically to <?xml version="1.0" encoding="utf-8" standalone="no"?> and this I guess is not allowing me to run the project on real phone (it runs on emulator). Though I remove standalone="no" and save the file, it appears again when I open the file.

What is the reason for this and how to overcome this?

Thank you for your time.

Cheers,
Madhu

Hi,

I tried using textview.setTranslationY(float) to change the y-coordinate of the textview but it does not seem to work. textview.setTop() seems to do the same function but the documentation says this method is meant to be called by the layout system and should not generally be called otherwise, because the property may be changed at any time by the layout. I use textview.getTranslationY() to get the y-coordinate.

How can I set the y-coordinate of textview? If what I am doing above is wrong, kindly suggest an alternative way. Maybe there is another method to set y-coordinate which I have not found yet!

My situation: I have a textview whose height should change based on some value received. If I use textview.setHeight(int), the height increases from top to bottom. I want it to increase from bottom to top. So I change the y-coordinate of the textview every time I set it's height.

Cheers,
Madhu

down vote favorite


Hello,

I have a layout- an ImageView with TextViews on its top and bottom. Now I want to add a rectangular vertical bar (to the left or right of this setup) which changes its height (and also colour) from bottom to top. At the moment, I have used a TextView which increases height from top to bottom (I couldn't make it the other way round).

I don't know how to use graphics to draw a rectangle and then add that rectangle to the above xml layout (with an ImageView and 2 TextViews).

Please suggest a way to do this-either to increase the height of TextView from bottom to top or a different better way than what I am following.

Thank you for your time.

Cheers,

Madhu

Hello,

I have modified the main.xml to include an ImageView and two text views-one each on top and bottom of the ImageView. I set the image and the text to be displayed. Now I want to add another vertical bar to the left or right of this setup (one image view and two text views) and I want to programmatically increase or decrease the height of this vertical bar. I tried using a TextView and set it's height with TextView.setHeight(int variable) but this does not work and I get an error.

Please tell me if my approach is right (I guess it is not) or kindly inform me of any better way of doing this.

Cheers,
Madhu

main.xml

<?xml version="1.0" encoding="utf-8"?> <AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/assist" /> <TextView android:text="TextView" android:id="@+id/textView3" android:layout_width="50dip" android:visibility="invisible" android:layout_x="16dip" android:layout_y="37dip" android:textSize="10sp"> </TextView> <TextView android:id="@+id/textView2" android:textSize="40sp" android:text="TextView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:visibility="invisible" android:layout_x="137dip" android:layout_y="324dip"> </TextView> <TextView android:id="@+id/textView1" android:textSize="40sp" android:text="TextView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:visibility="invisible" android:layout_x="148dip" android:layout_y="18dip"> </TextView> <ImageView android:layout_height="wrap_content" android:visibility="invisible" android:layout_width="wrap_content" android:id="@+id/imageView1" android:src="@drawable/icon" android:layout_x="105dip" android:layout_y="98dip"> </ImageView> </AbsoluteLayout>

Main activity:

public class EcoDrive extends Activity { //static final String SERVERIP = "192.168.62.23"; //static final int SERVERPORT = 1400; final Handler mHandler = new Handler(); BufferedReader in; String str; String lastStr = ""; String presentGear = "0"; String recommendedGear = "0"; ImageView showImage; TextView text_top; TextView text_bottom; TextView ecoIndex; //ProgressBar mProgress; TextView mTitle; String data[] = new String[3]; //GraphicsView graphView; final Runnable mUpdateResults = new Runnable() { public void run(){ parser(); } }; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //graphView = new GraphicsView(this); showImage = (ImageView) findViewById(R.id.imageView1); text_top = (TextView) findViewById(R.id.textView1); text_bottom = (TextView) findViewById(R.id.textView2); ecoIndex = new TextView(this); //mProgress = (ProgressBar) findViewById(R.id.progressBar1); reading(); } public void reading(){ Thread t = new Thread(){ public void run(){ try { //InetAddress serverAddr = InetAddress.getByName("192.168.178.25"); Socket socket = new Socket("192.168.62.23", 1400, true); try { in = new BufferedReader(new InputStreamReader(socket.getInputStream())); final int delay = 10; final Timer _timer = new Timer(); _timer.scheduleAtFixedRate(new TimerTask() { public void run(){ try { if ((str = in.readLine())!= null) if (!str.equals(lastStr)){ mHandler.post(mUpdateResults); lastStr = str; } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }, 0, delay); } catch(Exception e){ e.printStackTrace(); } } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }; t.start(); } protected void parser() { Document doc = null; try{ DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); doc = (Document) db.parse(new ByteArrayInputStream(str.getBytes())); NodeList n = doc.getElementsByTagName("N"); Node nd = n.item(0); String msgName = nd.getFirstChild().getNodeValue(); NodeList n1 = doc.getElementsByTagName("V"); Node nd1 = n1.item(0); String tmpVal = nd1.getFirstChild().getNodeValue(); data[0] = msgName; data[1] = tmpVal; actionOnData(data[0], data[1]); } catch(Exception e){ e.printStackTrace(); } } public void actionOnData(String name, String value) { int val = Integer.parseInt(value); if(name.equals("EcoIndex")) { //Log.d("TCP","in actionOnData " + data[0] + " " + data[1]); text_bottom.setText(presentGear); text_top.setText(recommendedGear); ecoIndex.setHeight(30); ecoIndex.setBackgroundResource(R.color.colour1); ecoIndex.setText("E"); showImage.setVisibility(0); text_bottom.setVisibility(0); text_top.setVisibility(0); ecoIndex.setVisibility(0); } else if(name.equals("shiftDirection") && value.equals("1")) { //Log.d("TCP","in actionOnData " + data[0] + " " + data[1]); showImage.setImageResource(R.drawable.shift_up); text_bottom.setText(presentGear); text_top.setText(recommendedGear); showImage.setVisibility(0); text_bottom.setVisibility(0); text_top.setVisibility(0); } else if(name.equals("recomGear") && value != null) { //Log.d("TCP","in actionOnData " + data[0] + " " + data[1]); showImage.setVisibility(4); text_bottom.setVisibility(4); text_top.setVisibility(4); recommendedGear = value; } else if(name.equals("shiftDirection") && value.equals("-1")) { showImage.setImageResource(R.drawable.shift_down); text_top.setText(presentGear); text_bottom.setText(recommendedGear); showImage.setVisibility(0); text_bottom.setVisibility(0); text_top.setVisibility(0); } else if(name.equals("currGear") && value != null) { //Log.d("TCP","in actionOnData " + data[0] + " " + data[1]); showImage.setVisibility(4); text_bottom.setVisibility(4); text_top.setVisibility(4); presentGear = value; } else if(name.equals("shiftDirection") && value.equals("0")) { //Log.d("TCP","in actionOnData " + data[0] + " " + data[1]); showImage.setVisibility(4); text_bottom.setVisibility(4); text_top.setVisibility(4); } else mTitle.setText("Just show something"); } }

Daniel Trebbien wrote:Does actionOnData ever get called a second time?

Of course... Every time there is a new message read in the client (thread), it is passed to the parser and after parsing, the actionOnData is called from the parser.

Hello,

I have the following main class and thread-TCP Client. The client runs in a loop, receives messages and passes it to main class. In the main class, I parse the message and try to show different images based on the name and value of the message received. Ex: shiftDirection1 name: shiftDirection & value: 1

But I can show only the image corresponding to the first received message and the images corresponding to the remaining received messages cannot be displayed.

Please go through the code below and kindly suggest the mistake/problem and alternative ways.

Thank you for your time and efforts.

Madhu

main class:

public class TCPListen extends Activity implements TCPListener { private TextView mTitle; public String recData[] = new String[2]; String PresentGear = "0"; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); TcpServiceHandler handler = new TcpServiceHandler(this,this); Thread th = new Thread(handler); th.start(); } public String[] callCompleted(String source){ //Log.d("TCP", "Std parser " + source); //mTitle.setText(source); //String data[] = new String[2]; //if (source.matches("<MSG><N>.*</N><V>.*</V></MSG>")) { Document doc = null; try{ DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); doc = (Document) db.parse(new ByteArrayInputStream(source.getBytes())); NodeList n = doc.getElementsByTagName("N"); Node nd = n.item(0); String msgName = nd.getFirstChild().getNodeValue(); NodeList n1 = doc.getElementsByTagName("V"); Node nd1 = n1.item(0); String tmpVal = nd1.getFirstChild().getNodeValue(); recData[0] = msgName; recData[1] = tmpVal; if (recData[0].equals("currGear")) PresentGear = recData[1]; Log.d("TCP", "Inside Std parser " + recData[0] + " " + recData[1]); actionOnData(recData[0], recData[1]); } catch(Exception e){ e.printStackTrace(); } Log.d("TCP", "Just outside Std parser " + recData[0] + " " + recData[1]); return recData; //} else Log.d("TCP", "Message in wrong format " + source); //mTitle.setText("Message in wrong format " + source); //return data; } //Function to display driver messages/images based on individual messages public void actionOnData(String name, String value) { String tempName = name; String tempVal = value; setContentView(R.layout.image); ImageView showImage = (ImageView) findViewById(R.id.imageView1); //Log.d("TCP", "------------>" + tempName + " " + tempVal); if (tempName.equals("shiftDirection") && tempVal.equals("1")) { //setContentView(R.layout.image); //TextView text_top = (TextView) findViewById(R.id.textView1); //showImage = (ImageView) findViewById(R.id.imageView1); //text_bottom.setText(Info[1]); showImage.setImageResource(R.drawable.shift_up); Log.d("TCP", "1------------>" + showImage); } else if (tempName.equals("shiftDirection") && tempVal.equals("-1")) { //setContentView(R.layout.image); //TextView text_bottom = (TextView) findViewById(R.id.textView2); //Resources res = getResources(); //Drawable drawable = res.getDrawable(R.drawable.shift_down); //showImage = (ImageView) findViewById(R.id.imageView1); //text_bottom.setText(Info[1]); showImage.setImageResource(R.drawable.shift_down); } else if (tempName.equals("recomGear") && tempVal != null) { Log.d("TCP", "3------------>" + tempName + " " + tempVal); Integer msgValue = Integer.parseInt(recData[1]); //Integer CurrentGear = (msgValue) - 1; //Log.d("TCP","in DA Images. Current gear: " + CurrentGear); //String Gear = Integer.toString(CurrentGear); setContentView(R.layout.image); TextView text_top = (TextView) findViewById(R.id.textView1); TextView text_bottom = (TextView) findViewById(R.id.textView2); showImage = (ImageView) findViewById(R.id.imageView1); showImage.setImageResource(R.drawable.shift_up); text_bottom.setText(PresentGear); text_top.setText(tempVal); } else if (tempName.equals("currGear") && tempVal != null) { Log.d("TCP", "4------------>" + tempName + " " + tempVal); PresentGear = tempVal; //Log.d("TCP","in DA Images. Present gear1: " + PresentGear); setContentView(R.layout.image); TextView text_bottom = (TextView) findViewById(R.id.textView2); text_bottom.setText(PresentGear); } else if (tempName.equals("shiftDirection") && tempVal.equals("0")) { Log.d("TCP", "5------------>" + tempName + " " + tempVal); Log.d("TCP","in DA Images. Present gear: " + PresentGear); setContentView(R.layout.image); TextView text_bottom = (TextView) findViewById(R.id.textView2); //TextView text_top = (TextView) findViewById(R.id.textView1); //text_top.setText("Go on"); text_bottom.setText(PresentGear); } } }

Only the image corresponding to the first if case is displayed. The program control enters the second if loop but does not show the image there.

Interface:

public interface TCPListener { public String[] callCompleted(String msg); }

Thread (TCP Client):

public class TcpServiceHandler implements Runnable { TCPListener _listener; private Activity _act; public BufferedReader in; public TcpServiceHandler(TCPListener listener, Activity act){ _listener = listener; _act = act; } public synchronized void run() { // TODO Auto-generated method stub //if(socket==null){ try { //InetAddress serverAddr = InetAddress.getByName("192.168.178.25"); Socket socket = new Socket("192.168.62.23", 1200, true); // //while(true){ try { in = new BufferedReader(new InputStreamReader(socket.getInputStream())); final int delay = 100; final Timer _timer = new Timer(); _timer.scheduleAtFixedRate(new TimerTask() { public void run(){ String str; try { str = in.readLine(); _listener.callCompleted(str); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }, 0, delay); //final String str = in.readLine(); //this._act.runOnUiThread(new Runnable(){ //public void run() { // _listener.callCompleted(str); // } //}); } catch(Exception e){ e.printStackTrace(); } //} } catch (UnknownHostException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

Hello,

Please go through the code below.

String[] Info contains 2 values like this: shiftDirection & 1 or currGear & 5 and similar pairs. If I receive shiftDirection & 0, I should display the previously received value of currGear. So I create PresentGear as a global variable and when currGear is received, I store it's value in PresentGear. Then when I receive shiftDirection & 0, I try to display PresentGear but nothing gets displayed. PresentGear is assigned no value. It would be very helpful if someone could suggest why this is happening or if my approach is wrong, kindly suggest an alternative way.

Cheers,
Madhu

public class Images extends Activity { /** Called when the activity is first created. */ //LinearLayout mLinearLayout; //ImageView showImage; String PresentGear = ""; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle extras = getIntent().getExtras(); String[] Info = extras.getStringArray("MsgInfo"); Log.d("TCP","in DA Images. Message name: " + Info[0] + ", value: " + Info[1]); if (Info[0].equals("currGear")) { PresentGear = Info[1]; setContentView(R.layout.image); TextView text_bottom = (TextView) findViewById(R.id.textView2); text_bottom.setText(Info[1]); } Log.d("TCP","in DA Images. Present gear1: " + PresentGear); DataAction(Info[0], Info[1]); } public void DataAction (String mName, String mVal) { String _mName = mName; String _mVal = mVal; if (_mName.equals("shiftDirection") && _mVal.equals("1")) { setContentView(R.layout.image); //TextView text_top = (TextView) findViewById(R.id.textView1); ImageView showImage = (ImageView) findViewById(R.id.imageView1); //text_bottom.setText(Info[1]); showImage.setImageResource(R.drawable.shift_up); } else if (_mName.equals("shiftDirection") && _mVal.equals("-1")) { setContentView(R.layout.image); //TextView text_bottom = (TextView) findViewById(R.id.textView2); ImageView showImage = (ImageView) findViewById(R.id.imageView1); //text_bottom.setText(Info[1]); showImage.setImageResource(R.drawable.shift_down); } else if (_mName.equals("recomGear") && _mVal != null) { Integer msgValue = Integer.parseInt(_mVal); Integer CurrentGear = (msgValue) - 1; Log.d("TCP","in DA Images. Current gear: " + CurrentGear); String Gear = Integer.toString(CurrentGear); setContentView(R.layout.image); TextView text_top = (TextView) findViewById(R.id.textView1); TextView text_bottom = (TextView) findViewById(R.id.textView2); ImageView showImage = (ImageView) findViewById(R.id.imageView1); showImage.setImageResource(R.drawable.shift_up); text_bottom.setText(Gear); text_top.setText(_mVal); //} //else if (_mName.equals("currGear") && _mVal != null) { //PresentGear = _mVal; //Log.d("TCP","in DA Images. Present gear1: " + PresentGear); //setContentView(R.layout.image); //TextView text_bottom = (TextView) findViewById(R.id.textView2); //text_bottom.setText(_mVal); } else if (_mName.equals("shiftDirection") && _mVal.equals("0")) { Log.d("TCP","in DA Images. Present gear: " + PresentGear); setContentView(R.layout.image); TextView text_bottom = (TextView) findViewById(R.id.textView2); TextView text_top = (TextView) findViewById(R.id.textView1); text_top.setText("Go on"); text_bottom.setText(PresentGear); } } }

Monu Tripathi wrote:

check for new message every 100 ms

You might want to increase the polling interval for one thing.

Thank you for the response. Could you suggest how to increase the polling interval? I can think of TimerTask. But I am not sure where to use this TimerTask in the client thread.

Hello,

Firstly, I have been greatly helped by this forum. Now my problem this time.

I have a TCP client running in Android phone. It connects and receives data from a windows application. Once I receive a message, I parse it and I try to display an image. I have to keep checking for new messages from this windows app.

The client thread keeps running. When a message is received, I pass it to the main activity, parse it but I am not able to display the image. I want to make the client check for new message every 100 ms. At the moment, the LogCat gets flooded as the thread keeps running and I am not able to really see the contents of LogCat.

Basically I want to run the client, keep checking for new messages every 100 ms, when a new message is there, pass it to the main activity, parse it and display an image. Please go through the code below and suggest any corrections or a better approach if necessary.

Cheers,
Madhu

The client code is below.

Main activity:

public class TCPListen extends Activity implements TCPListener { private TextView mTitle; public String data[] = new String[2]; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //setContentView(R.layout.main); // Set up the window layout requestWindowFeature(Window.FEATURE_CUSTOM_TITLE); setContentView(R.layout.main); getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title); // Set up the custom title mTitle = (TextView) findViewById(R.id.title_left_text); mTitle.setText(R.string.app_name); mTitle = (TextView) findViewById(R.id.title_right_text); //TcpServiceHandler handler=new TcpServiceHandler(this); //handler.execute("192.168.62.23"); TcpServiceHandler handler = new TcpServiceHandler(this,this); Thread th = new Thread(handler); th.start(); } public String[] callCompleted(String source){ Log.d("TCP", "Std parser " + source); mTitle.setText(source); //String data[] = new String[2]; //if (source.matches("<MSG><N>.*</N><V>.*</V></MSG>")) { Document doc = null; try{ DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); doc = (Document) db.parse(new ByteArrayInputStream(source.getBytes())); NodeList n = doc.getElementsByTagName("N"); Node nd = n.item(0); String msgName = nd.getFirstChild().getNodeValue(); NodeList n1 = doc.getElementsByTagName("V"); Node nd1 = n1.item(0); String tmpVal = nd1.getFirstChild().getNodeValue(); data[0] = msgName; data[1] = tmpVal; Log.d("TCP", "Inside Std parser " + data[0] + " " + data[1]); actionOnData(data[0], data[1]); } catch(Exception e){ e.printStackTrace(); } Log.d("TCP", "Just outside Std parser " + data[0] + " " + data[1]); return data; //} else Log.d("TCP", "Message in wrong format " + source); //mTitle.setText("Message in wrong format " + source); //return data; } //Function to display driver messages/images based on individual messages public void actionOnData(String name, String value) { String tempName = name; String tempVal = value; //while (true) { if(tempName.equals("shiftDirection") && tempVal.equals("1")) { Log.d("TCP","in actionOnData " + data[0] + " " + data[1]); mTitle.setText("Change to next higher gear"); Intent myIntent = new Intent(); myIntent.setClassName("com.example.android.TCPListen", "com.example.android.TCPListen.Images"); //myIntent.putExtra("Change gear", "Shift to next gear!"); // key/value pair, where key needs current package prefix. startActivity(myIntent); try { wait(3000); } catch(InterruptedException e) { System.out.println("InterruptedException caught"); } } else if(tempName.equals("vehicleSpeed") && tempVal.equals("120")) { Log.d("TCP","in actionOnData " + data[0] + " " + data[1]); mTitle.setText("Drive like a man"); //Intent myIntent = new Intent(); //myIntent.setClassName("com.example.android.TCPListen", "com.example.android.TCPListen.Images"); ////myIntent.putExtra("Change gear", "Shift to next gear!"); // key/value pair, where key needs current package prefix. //startActivity(myIntent); } else Log.d("TCP", "Just show an image"); //} } }

Interface:

public interface TCPListener { public String[] callCompleted(String msg); }

Client thread:

public class TcpServiceHandler implements Runnable { TCPListener _listener; private Activity _act; public TcpServiceHandler(TCPListener listener, Activity act){ _listener = listener; _act = act; } public synchronized void run() { // TODO Auto-generated method stub //if(socket==null){ try { //InetAddress serverAddr = InetAddress.getByName("192.168.178.25"); Socket socket = new Socket("192.168.2.103", 1200, true); // while(true){ try { BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream())); final String str = in.readLine(); this._act.runOnUiThread(new Runnable(){ public void run() { _listener.callCompleted(str); } }); } catch(Exception e){ e.printStackTrace(); } } } catch (UnknownHostException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

Swastik Dey wrote:I hope this time it solves your purpose
public class TcpServiceHandler implements Runnable{ TCPListener _listener; private Activity _act; public TcpServiceHandler(TCPListener listener,Activity act){ _listener=listener; _act=act; } public synchronized void run() { // TODO Auto-generated method stub //if(socket==null){ try { InetAddress serverAddr = InetAddress.getByName("192.168.1.123"); Socket socket= new Socket(serverAddr, 1200); // while(true){ try { BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream())); final String str = in.readLine(); this._act.runOnUiThread(new Runnable(){ public void run() { _listener.callCompleted(str); } }); } catch(Exception e){ e.printStackTrace(); } } } catch (UnknownHostException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
//in onCreate of your main actiivty //remove the call to MessageConsumer TcpServiceHandler handler=new TcpServiceHandler(this,this); Thread th=new Thread(handler); th.start();

import java.net.*; import java.io.*; public class TCPSendServer implements Runnable{ public static final String SERVERIP = "192.168.62.23"; public static final int SERVERPORT = 1200; public void run() { try { System.out.println("S: Connecting..."); ServerSocket serverSocket = new ServerSocket(SERVERPORT); //String msg = "<MSG><N>shiftDirection</N><V>1</V></MSG>"; String msg1 = "<MSG><N>shiftDirection</N><V>0</V></MSG>"; String msg2 = "SD<!N><V>0<!V><!MSG>"; int ktr=1; Socket client = serverSocket.accept(); while (true) { try { PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(client.getOutputStream())),true); if(ktr==1){ System.out.println("S: Sending: '" + msg2+ "'"); out.println(msg2); ktr++; } else{ System.out.println("S: Sending: '" + msg1+ "'"); out.println(msg1); ktr=1; } out.flush(); System.out.println("S: Sent."); System.out.println("S: Done."); Thread.sleep(1000); } catch(Exception e) { System.out.println("S: Error"); e.printStackTrace(); } //finally { // client.close(); //} } } catch (Exception e) { System.out.println("S: First try error"); e.printStackTrace(); } } public static void main (String a[]) { Thread desktopServerThread = new Thread(new TCPSendServer()); desktopServerThread.start(); } }

Hi Swastik,

When I used this code for client, it works alright. The server was another Java app running in Eclipse. When I tried to receive message from my colleague's app (developed in Rhapsody and I think C++), I receive the message only after his app is closed and not while his app is running and sending messages. Do you have any idea why this happens?

My situation: I run the client code on Android phone (HTC Desire). If the server is a java app running in Eclipse, then I can receive data sent by this server on my Android phone. When I try to receive data from another app (say abc, which can be considered to be acting as server), then I can connect to the app but cannot receive any data. Instead of connecting the real phone to abc, if I try connecting the client from emulator, then I can receive the data sent from abc only after abc is closed, not when it is running and sending data. Real phone & abc doesn't work-connection is established but no data

The java server is like this:

public class TCPSendServer implements Runnable{ public static final String SERVERIP = "192.168.178.24"; public static final int SERVERPORT = 1200; //static Category cat = Category.getInstance(TCPSendServer.class.getName()); //cat.debug("Start of main()"); public void run() { try { System.out.println("S: Connecting..."); ServerSocket serverSocket = new ServerSocket(SERVERPORT); String msg = "<MSG><N>shiftDirection</N><V>1</V></MSG>"; String msg1 = "<MSG><N>vehicleSpeed</N><V>120</V></MSG>"; String msg2 = "SD<!N><V>0<!V><!MSG>"; //while (true) { Socket client = serverSocket.accept(); try { System.out.println("S: Sending: '" + msg + "'"); PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(client.getOutputStream())),true); Thread.sleep (5000); out.println(msg); Thread.sleep (5000); //out.println(msg2); Thread.sleep (5000); out.println(msg1); //out.flush(); System.out.println("S: Sent."); System.out.println("S: Done."); } catch(Exception e) { System.out.println("S: Error"); e.printStackTrace(); } //finally { // client.close(); //} //} } catch (Exception e) { System.out.println("S: First try error"); e.printStackTrace(); } } public static void main (String a[]) { Thread desktopServerThread = new Thread(new TCPSendServer()); desktopServerThread.start(); } }

Swastik Dey wrote:I hope this time it solves your purpose
public class TcpServiceHandler implements Runnable{ TCPListener _listener; private Activity _act; public TcpServiceHandler(TCPListener listener,Activity act){ _listener=listener; _act=act; } public synchronized void run() { // TODO Auto-generated method stub //if(socket==null){ try { InetAddress serverAddr = InetAddress.getByName("192.168.1.123"); Socket socket= new Socket(serverAddr, 1200); // while(true){ try { BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream())); final String str = in.readLine(); this._act.runOnUiThread(new Runnable(){ public void run() { _listener.callCompleted(str); } }); } catch(Exception e){ e.printStackTrace(); } } } catch (UnknownHostException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
//in onCreate of your main actiivty //remove the call to MessageConsumer TcpServiceHandler handler=new TcpServiceHandler(this,this); Thread th=new Thread(handler); th.start();

import java.net.*; import java.io.*; public class TCPSendServer implements Runnable{ public static final String SERVERIP = "192.168.62.23"; public static final int SERVERPORT = 1200; public void run() { try { System.out.println("S: Connecting..."); ServerSocket serverSocket = new ServerSocket(SERVERPORT); //String msg = "<MSG><N>shiftDirection</N><V>1</V></MSG>"; String msg1 = "<MSG><N>shiftDirection</N><V>0</V></MSG>"; String msg2 = "SD<!N><V>0<!V><!MSG>"; int ktr=1; Socket client = serverSocket.accept(); while (true) { try { PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(client.getOutputStream())),true); if(ktr==1){ System.out.println("S: Sending: '" + msg2+ "'"); out.println(msg2); ktr++; } else{ System.out.println("S: Sending: '" + msg1+ "'"); out.println(msg1); ktr=1; } out.flush(); System.out.println("S: Sent."); System.out.println("S: Done."); Thread.sleep(1000); } catch(Exception e) { System.out.println("S: Error"); e.printStackTrace(); } //finally { // client.close(); //} } } catch (Exception e) { System.out.println("S: First try error"); e.printStackTrace(); } } public static void main (String a[]) { Thread desktopServerThread = new Thread(new TCPSendServer()); desktopServerThread.start(); } }

Hi Swastik,

When I run the application (with the above code), how can I stop the app? Once I start it, the app keeps running all the time, phone kind of hangs and is not possible to stop it. Only way is I have to keep pressing "Home" button on phone many times and then got o Settings-App-Manage app and stop this app by pressing "Force Stop". Could you suggest a way out of this?

Regards,
Madhu

Swastik Dey wrote:I hope this time it solves your purpose
public class TcpServiceHandler implements Runnable{ TCPListener _listener; private Activity _act; public TcpServiceHandler(TCPListener listener,Activity act){ _listener=listener; _act=act; } public synchronized void run() { // TODO Auto-generated method stub //if(socket==null){ try { InetAddress serverAddr = InetAddress.getByName("192.168.1.123"); Socket socket= new Socket(serverAddr, 1200); // while(true){ try { BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream())); final String str = in.readLine(); this._act.runOnUiThread(new Runnable(){ public void run() { _listener.callCompleted(str); } }); } catch(Exception e){ e.printStackTrace(); } } } catch (UnknownHostException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
//in onCreate of your main actiivty //remove the call to MessageConsumer TcpServiceHandler handler=new TcpServiceHandler(this,this); Thread th=new Thread(handler); th.start();

import java.net.*; import java.io.*; public class TCPSendServer implements Runnable{ public static final String SERVERIP = "192.168.62.23"; public static final int SERVERPORT = 1200; public void run() { try { System.out.println("S: Connecting..."); ServerSocket serverSocket = new ServerSocket(SERVERPORT); //String msg = "<MSG><N>shiftDirection</N><V>1</V></MSG>"; String msg1 = "<MSG><N>shiftDirection</N><V>0</V></MSG>"; String msg2 = "SD<!N><V>0<!V><!MSG>"; int ktr=1; Socket client = serverSocket.accept(); while (true) { try { PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(client.getOutputStream())),true); if(ktr==1){ System.out.println("S: Sending: '" + msg2+ "'"); out.println(msg2); ktr++; } else{ System.out.println("S: Sending: '" + msg1+ "'"); out.println(msg1); ktr=1; } out.flush(); System.out.println("S: Sent."); System.out.println("S: Done."); Thread.sleep(1000); } catch(Exception e) { System.out.println("S: Error"); e.printStackTrace(); } //finally { // client.close(); //} } } catch (Exception e) { System.out.println("S: First try error"); e.printStackTrace(); } } public static void main (String a[]) { Thread desktopServerThread = new Thread(new TCPSendServer()); desktopServerThread.start(); } }

Hi Swastik,

I tried the above without the changed SendServer. It helped a lot. Thank you.

The server is the app in the car PC which gets messages with updated values every 100 milliseconds and sends those messages to the Android app.

So when I receive more than one message and I have to display an image or a text info for each message received, it hangs. I am trying to incorporate some things like this: after a particular message is received, I have to kind of freeze all other execution so that I can show some image or info related to the received message and after that resume all the execution.

Thanks a lot again.

Sorry...nothing here

Swastik Dey wrote:Probably you are right. Another point is in the pull from server approach code maintainability will be better and overhead on server is less, because it will send a response only when it gets a request.

I will explain my situation. The Android app will run and communicate with the application running in the car PC. And the messages from the car PC are sent randomly based on how the car is being driven. For example, shiftDirection is a message which will be set to 1 and sent when the RPM is high enough and the driver has not shifted to the next gear. The Android app has to just respond to the messages it receives and do actions like show an image or display driver assistance info, etc. So the Android app really has no control over the messages it can receive. So will the pull approach really work here?

Swastik Dey wrote:Do you find anything wrong with the approach that I told you, i.e. instead of push to device go for pull from device.

About pull from server, I feel it is a good approach. Will try and inform you.

Regarding current situation, I think the TimerTask is running every second and each time it runs, it tries to connect on a different socket. The port number is fixed (1200 in this case) but the socket number keeps changing every time it connects. What I need to do is connect just once, then keep looking for new incoming messages. I have to run the part which looks for new incoming messages as/in a TimerTask. I think this is the cause of the problem. What do you feel?