Develop Reference

By starting a new activity, it starts again and again

I set a textview, which I use for timer-function.
When the timer reachs my wanted time it should start a new activity, that set my Layout to another one.
textfield=(TextView)findViewById(R.id.TVTimer);
handler = new Handler();
Runnable runnable = new Runnable() {
#Override
public void run() {
while (Running){
try {
Thread.sleep(1000);
}
catch (InterruptedException e) {
e.printStackTrace();
// TODO: handle exception
}
handler.post(new Runnable() {
#Override
public void run(){
number+=1;
textfield.setText(String.valueOf(number));
if (number>5) {
Intent intent = new Intent(getApplicationContext(), Uebung2.class);
startActivity(intent);
}
}
} );
}
}
};
new Thread(runnable).start();
That is the called class:
public class Uebung2 extends Oberklasse {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
//Liegestützen1(2);
setContentView(R.layout.new);
}
}
Now I am having the problem after the timer reached the time, which I want, my app is settin g the layout again and again for every second.
What is the solution to set the layout for once?

beacuse you have place this
handler.post(new Runnable() {
#Override
public void run(){
number+=1;
textfield.setText(String.valueOf(number));
if (number>5) {
Intent intent = new Intent(getApplicationContext(), Uebung2.class);
startActivity(intent);
}
}
} );
inside your while loop.
also check your "number" value.
try your while loop as
int i=1000;
while (i<5000){
try {
Thread.sleep(i);
i+=1000;
}
catch (InterruptedException e) {
e.printStackTrace();
// TODO: handle exception
}
}
and after this execute your runnable.

use this
textfield=(TextView)findViewById(R.id.TVTimer);
boolean loop = true;
handler = new Handler();
Runnable runnable = new Runnable() {
#Override
public void run() {
while (loop){
try {
Thread.sleep(1000);
}
catch (InterruptedException e) {
e.printStackTrace();
// TODO: handle exception
}
handler.post(new Runnable() {
#Override
public void run(){
number+=1;
textfield.setText(String.valueOf(number));
if (number>5) {
loop = false; // this will end loop
Intent intent = new Intent(getApplicationContext(), Uebung2.class);
startActivity(intent);
}
}
} );
}
}
};
new Thread(runnable).start();

Show Toast from a thread started in a broadcast receiver

I have a BroadcastReceiver.
There I create a new Thread.
How can I show a toast in that thread?
Thanks

Use below code for perform UI operation from non-UI thread
new Handler(Looper.getMainLooper()).post(new Runnable() {
#Override
public void run() {
// your stuff to update the UI
}
});

Try This code
public void start_insert() {
pDialog.show();
new Thread() {
#Override
public void run() {
int what = 0;
try {
// Do Something in Background
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
what = 1;
e.printStackTrace();
}
handler22.sendMessage(handler22.obtainMessage(what));
}
}.start();
}
private Handler handler22 = new Handler() {
#Override
public void handleMessage(Message msg) {
pDialog.dismiss();
Toast.makeText(getApplicationContext(), "SuccessFull",
10).show();
}
};

Activity_Name.this.runOnUiThread(new Runnable() {
#Override
public void run() {
// your stuff to update the UI
}
});
Use this code to update UI thread or execute any UI related operation.

Android: AsyncTask timeout

Is it possible to do splash screen that will execute HTTP request and if this request is executing too long, i.e. 7-10 seconds, then abort the request and jump to the main activity?
The below code is what I did, but it doesn't work - the timeout isn't working, the HTTP request and jumping are working. As I understand, it's possible to use the AsyncTask's get() method or handler with delay. Get() method should be in separate thread but it doesn't work. How to do this task?
EDIT:
public class SplashActivity extends Activity {
private static final String TAG = "SplashActivity";
private Handler handler = new Handler();
private Runnable r;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.splash_layout);
if (Helpers.isNetworkConnected(getApplicationContext())) {
Log.d(TAG, "Has Internet");
final DownloadFAQ downloadFAQ = new DownloadFAQ();
new Thread(new Runnable() {
public void run() {
try {
Log.d(TAG, "Timing...");
downloadFAQ.execute().get(1000, TimeUnit.MILLISECONDS);
SplashActivity.this.runOnUiThread(new Runnable() {
public void run() {
Log.d(TAG, "redirect");
redirect();
}
});
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
} catch (TimeoutException e) {
downloadFAQ.cancel(true);
Log.d(TAG, "Task has benn canceled");
if (downloadFAQ.isCancelled())
redirect();
}
}
}).start();
} else {
r = new Runnable() {
public void run() {
redirect();
}
};
handler.postDelayed(r, 2500);
}
}
private class DownloadFAQ extends AsyncTask<Void, Void, Void> {
#Override
protected Void doInBackground(Void... params) {
Log.d(TAG, "Execute task");
ServerAPI server = new ServerAPI(getApplicationContext());
server.serverRequest(ServerAPI.GET_FAQ, null);
return null;
}
}
private void redirect() {
Intent i = new Intent(SplashActivity.this, TabsActivity.class);
startActivity(i);
finish();
}
#Override
protected void onDestroy() {
super.onDestroy();
handler.removeCallbacks(r);
}
}

because you are trying to start AsyncTask again inside doInBackground when it's still running . change your code as to get it work :
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.splash_layout);
downloadFAQ = new DownloadFAQ();
new Thread(new Runnable() {
public void run() {
try {
downloadFAQ.execute().get(2000, TimeUnit.MILLISECONDS);
SplashActivity.thisrunOnUiThread(new Runnable() {
public void run() {
// start Activity here
Intent i = new Intent(SplashActivity.this,
TabsActivity.class);
SplashActivity.this.startActivity(i);
SplashActivity.this.finish();
}
});
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TimeoutException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).start();
}
and you will need to remove downloadFAQ.get(2000, TimeUnit.MILLISECONDS); from doInBackground method change your AsyncTask as
private class DownloadFAQ extends AsyncTask<Void, Void, Void> {
#Override
protected Void doInBackground(Void... params) {
ServerAPI server = new ServerAPI(getApplicationContext());
server.serverRequest(ServerAPI.GET_FAQ, null);
return null;
}
protected void onPostExecute(Void result) {
}
}

consider using asyncTask status:
AsyncTask.Status

Automatically Refresh JmDNS Services in Activity

I'm trying to automatically refresh JmDNS services in the background. Nothing is happening when I try:
#Override
public void onDestroy() {
try {
hiNeighborService.unregisterListener(this);
this.unbindService(this.serviceConnection);
} catch (Exception ex) {
Log.e(LOG_TAG, "Exception occur during destroying the app.");
}
super.onDestroy();
}
#Override
public void onStart() {
/*new Thread(new Runnable() {
#Override
public void run() {
// TODO Auto-generated method stub
try {
refreshServices();
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).start();*/
ScheduledExecutorService scheduleTaskExecutor = Executors.newScheduledThreadPool(5);
// This schedule a runnable task every 2 minutes
scheduleTaskExecutor.scheduleAtFixedRate(new Runnable() {
public void run() {
rebindService();
refreshServices();
}
}, 0, 1, TimeUnit.SECONDS);
super.onStart();
}
#Override
public void onRestart() {
/*new Thread(new Runnable() {
#Override
public void run() {
// TODO Auto-generated method stub
try {
refreshServices();
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).start();*/
ScheduledExecutorService scheduleTaskExecutor = Executors.newScheduledThreadPool(5);
// This schedule a runnable task every 2 minutes
scheduleTaskExecutor.scheduleAtFixedRate(new Runnable() {
public void run() {
rebindService();
refreshServices();
}
}, 0, 1, TimeUnit.SECONDS);
super.onRestart();
}
#Override
public void onResume() {
/*new Thread(new Runnable() {
#Override
public void run() {
// TODO Auto-generated method stub
try {
refreshServices();
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).start();*/
ScheduledExecutorService scheduleTaskExecutor = Executors.newScheduledThreadPool(5);
// This schedule a runnable task every 2 minutes
scheduleTaskExecutor.scheduleAtFixedRate(new Runnable() {
public void run() {
rebindService();
refreshServices();
}
}, 0, 1, TimeUnit.SECONDS);
super.onResume();
}
This is my resfreshServices() method:
private void refreshServices() {
Log.i(LOG_TAG, "Refresh available neighbors...");
final List<Neighbor> activeNeighbors = this.hiNeighborService
.getActiveNeighbors();
Log.d(LOG_TAG, activeNeighbors.size() + " active neighbors are found!");
new Thread(new Runnable() {
public void run() {
Log.i(LOG_TAG, "refresh UI...");
try {
synchronized (activeNeighborsViewModel) {
activeNeighborsViewModel.clear();
for (Neighbor neighbor : activeNeighbors) {
NeighborViewModel vm = new NeighborViewModel(
neighbor);
vm.setNeighborUnreadCount(ConnectActivity.this
.getUnreadMessageCount(neighbor));
if (activeNeighborsViewModel.contains(vm)) {
activeNeighborsViewModel.remove(vm);
}
activeNeighborsViewModel.add(vm);
}
}
notifyServiceListChanged();
Log.i(LOG_TAG, "refresh completed!");
} catch (Exception ex) {
ex.printStackTrace();
Log.e(LOG_TAG, ex.toString());
}
}
}).start();
}
Normally that gets call when a button is clicked however I would like it to be automatic. This code doesn't do anything unless I hit the Resfresh button that call resfreshServices(). I attempted to try it with threads but the activity closes and so does the app. Any ideas?

First a little comment on your code. Why are you implementing the same code three times in three different methods. I assume that you are programming android (loking at your method names). The method onresume is executed every time the activity is started or resumed. See this link for more information on this topic.
Ok, then... Did you already check the docs for more information about the ScheduledExecutorService?
Now for the jmdns issue. The jmDns library has a build in functionality to update the services. you can listen to new services and take the appropriate action when new services are available. I do not think, that repeated polling of the services is the right approach.
Look here for a little tutorial on using jmdns in android.

How to send data from ServerSocket to Socket?

After asking so many question about android socket programming and getting valuable answers from stackoverflow's members i could do a well working program using sockets to connect two device over wifi.
Thanks to all.
But still i am having some problem..
i have done the program in which
** Data can be sent from client and received at serverSocket**
But still i am not getting how to Send data from server which can be received at client
Code for Server Socket
private OnClickListener bt_sendListner = new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
String msg=et_msg.getText().toString();
Log.d("Msg", msg);
Thread threadsendmsg = new Thread(new Threadsendmsg(msg));
threadsendmsg.start();
}
};
public class Threadsendmsg implements Runnable{
String msg;
public Threadsendmsg(String msg) {
// TODO Auto-generated constructor stub
this.msg=msg;
}
public void run() {
// TODO Auto-generated method stub
try {
Looper.prepare();
Log.d("Msg", "Inside the thread");
//connected = true;
while (true) {
try {
Log.d("Msg", "Msg to be sent");
PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(serverSocket.accept().getOutputStream())), true);
// where you issue the commands
out.println("Client: "+msg);
Log.d("Msg", "Msg sent"+out.toString());
break;
} catch (final Exception e) {
handler.post(new Runnable() {
public void run() {
// TODO Auto-generated method stub
tv_chatbox.setText("S: Error= "+ e.getMessage());
Log.d("Msg", e.getMessage());
}
});
}
}
// socket.close();
// console.append("\nC: Closed.");
} catch (final Exception e) {
handler.post(new Runnable() {
public void run() {
// TODO Auto-generated method stub
tv_chatbox.setText("S: Error= "+ e.getMessage());
Log.d("Msg", e.getMessage());
// TODO Auto-generated method stub
// console.append("\nC: Error= "+ e.getMessage());
}
});
// connected = false;
}
}
}
public class ServerThread implements Runnable {
public void run() {
try {
Looper.prepare();
if (SERVERIP != null) {
handler.post(new Runnable() {
public void run() {
serverStatus.setText("Listening on IP: " + SERVERIP);
}
});
serverSocket = new ServerSocket(SERVERPORT);
handler.post(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(), serverSocket.getLocalSocketAddress().toString()
, Toast.LENGTH_LONG).show();
serverStatus.append("\n"+serverSocket.getLocalSocketAddress().toString());
}
});
Toast.makeText(getApplicationContext(), serverSocket.getLocalSocketAddress().toString()
, Toast.LENGTH_LONG).show();
serverStatus.append("\n"+serverSocket.getLocalSocketAddress().toString());
while (true) {
// listen for incoming clients
Socket client = serverSocket.accept();
handler.post(new Runnable() {
public void run() {
serverStatus.setText("Connected.");
}
});
try {
BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
String line = null;
while ((line = in.readLine()) != null) {
Log.d("ServerActivity", line);
final String myline=new String(line);
handler.post(new Runnable() {
public void run() {
tv_chatbox.setText("Client said:="+myline);
// do whatever you want to the front end
// this is where you can be creative
}
});
}
break;
} catch (Exception e) {
handler.post(new Runnable() {
public void run() {
serverStatus.setText("Oops. Connection interrupted. Please reconnect your phones.");
}
});
e.printStackTrace();
}
}
} else {
handler.post(new Runnable() {
public void run() {
serverStatus.setText("Couldn't detect internet connection.");
}
});
}
} catch (final Exception e) {
handler.post(new Runnable() {
public void run() {
serverStatus.setText("Error"+e.getMessage());
}
});
e.printStackTrace();
}
}
}
*There is no method as ServerSocket.getOutputStream() in ServerSocket class.*Which i have used client socket...

Both client and server use the same class Socket. But client creates his socket instance manually and connects to server. Server on the other hand listens at some port and when client connects, socket for server is created and returned from method accept().
In your code you can use
client.getOutputStream();