I'm developing a simple chat app and it just stops after transmitting the message. The Server shows the message that means that it is sent successfully but my app crashes after that. This is the Client code :
package com.example.androidpc;
import java.io.IOException;
import java.io.PrintStream;
import java.net.Socket;
import java.util.Scanner;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class Chat extends Activity {
Socket socket;
EditText msg_txt;
TextView chatfield_tv;
Button send_btn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat);
msg_txt = (EditText) findViewById(R.id.msg_txt);
chatfield_tv = (TextView) findViewById(R.id.chatfield_tv);
send_btn = (Button) findViewById(R.id.send_btn);
socket = SocketWrapper.getSocket();
send_btn.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
new chatIO().execute();
}
});
}
private class chatIO extends AsyncTask<String,String,String>{
PrintStream ps;
Scanner scan;
#Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
try {
ps = new PrintStream(socket.getOutputStream());
ps.println(msg_txt.getText().toString());
publishProgress("you");
scan = new Scanner(socket.getInputStream());
publishProgress("i");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onProgressUpdate(String... values) {
// TODO Auto-generated method stub
if(values[0].equals("you"))
{
chatfield_tv.append("You : "+msg_txt.getText().toString());
msg_txt.setText("");
}
else
{
chatfield_tv.append("Server : "+scan.nextLine());
}
super.onProgressUpdate(values);
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
ps.flush();
scan.close();
super.onPostExecute(result);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.chat, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
Related
I am working on an app that implements a Web Socket server. I am referring this library - https://github.com/TooTallNate/Java-WebSocket
The problem is that the thread holds up the entire UI. Here is the code -
package com.example.websocket;
import java.net.InetSocketAddress;
import java.net.UnknownHostException;
import java.util.Collections;
import java.nio.ByteBuffer;
import org.java_websocket.WebSocket;
import org.java_websocket.drafts.Draft;
import org.java_websocket.drafts.Draft_17;
import org.java_websocket.framing.FrameBuilder;
import org.java_websocket.framing.Framedata;
import org.java_websocket.handshake.ClientHandshake;
import org.java_websocket.server.WebSocketServer;
import android.os.Bundle;
import android.provider.Settings.Global;
import android.app.Activity;
import android.content.Context;
import android.view.Menu;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
EditText port, msg;
Button listener, send;
TextView status;
int p;
int count = 0;
boolean connect = false;
boolean listen = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
msg = (EditText)findViewById(R.id.editText2);
listener = (Button)findViewById(R.id.button1);
send = (Button)findViewById(R.id.button2);
status = (TextView)findViewById(R.id.textView1);
listener.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Thread t = new Thread(new Runnable() {
#Override
public void run() {
try {
SimpleServer server = new SimpleServer();
server.start();
status.setText("Working inside Thread");
} catch (UnknownHostException e) {
e.printStackTrace();
}
}
});
t.start();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public class SimpleServer extends WebSocketServer {
public SimpleServer() throws UnknownHostException {
super(new InetSocketAddress(9998));
// TODO Auto-generated constructor stub
}
#Override
public void onClose(WebSocket arg0, int arg1, String arg2, boolean arg3) {
// TODO Auto-generated method stub
}
#Override
public void onError(WebSocket arg0, Exception arg1) {
// TODO Auto-generated method stub
}
#Override
public void onMessage(WebSocket arg0, String arg1) {
// TODO Auto-generated method stub
}
#Override
public void onOpen(WebSocket arg0, ClientHandshake arg1) {
status.setText("Working");
}
}
}
You cannot update ui from other threads:
status.setText("Working inside Thread");
use runOnUiThread method of activity
runOnUiThread(new Runnable() {
#Override
public void run() {
status.setText("Working inside Thread");
}
});
By the way youre code cause memory leack and crashes. You cannot start long living operations in activity context. You should run service ,or make this thread in application context, results to ui you can pass by using EventBus.
i'm developing a simple application on android studio. I'm using "application", "observable", and many more. i got some error like this:
java.lang.RuntimeException: Unable to start activity ComponentInfo{id.wdharmana.doahindu/id.wdharmana.doahindu.MainActivity}: java.lang.ClassCastException: android.app.Application cannot be cast to id.wdharmana.doahindu.app.DoaApplication
2nd error
Caused by: java.lang.ClassCastException: android.app.Application cannot be cast to id.wdharmana.doahindu.app.DoaApplication
3rd error
at id.wdharmana.doahindu.MainActivity.onCreate(MainActivity.java:52)
This is my full MainActivity.java:
package id.wdharmana.doahindu;
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.app.SearchManager;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.SearchView;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import id.wdharmana.doahindu.adapter.ListJudulAdapter;
import id.wdharmana.doahindu.app.DoaApplication;
import id.wdharmana.doahindu.data.DefaultData;
import id.wdharmana.doahindu.helper.DoaHelper;
import id.wdharmana.doahindu.model.DoaModel;
import id.wdharmana.doahindu.model.DoaObserver;
import java.util.ArrayList;
import java.util.Observable;
import java.util.Observer;
public class MainActivity extends AppCompatActivity implements Observer {
private ListView lvJudul;
private ArrayList<DoaModel> listJudul;
private DoaHelper doaHelper;
public ListJudulAdapter listJudulAdapter;
private DoaApplication application;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lvJudul = (ListView)findViewById(R.id.lvListJudul);
listJudul = new ArrayList<DoaModel>();
application = (DoaApplication) getApplication();
application.getDoaObserver().addObserver(this);
doaHelper = new DoaHelper(MainActivity.this);
doaHelper.open();
listJudul = doaHelper.getAllData();
if (listJudul.size()>0) {
bindData();
}else{
insertDefaultData();
}
lvJudul.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
showMeaningDialog(MainActivity.this, listJudul.get(arg2));
}
});
lvJudul.setOnItemLongClickListener(new OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
deleteDialog(listJudul.get(arg2).getId());
return false;
}
});
}
private void insertDefaultData() {
// TODO Auto-generated method stub
new StoreDefaultData().execute();
}
public void update(Observable observable, Object o) {
if (o.equals(DoaObserver.NEED_TO_REFRESH)){
bindData();
}
}
private class StoreDefaultData extends AsyncTask<Void, Void, Void>{
ProgressDialog mProgressDialog;
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
mProgressDialog = new ProgressDialog(MainActivity.this);
mProgressDialog.setTitle(getString(R.string.notify_input_data));
mProgressDialog.setMessage(getString(R.string.text_please_wait));
mProgressDialog.show();
}
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
for (int i = 0; i < DefaultData.defaultData.length; i++) {
doaHelper.insert(DoaModel.getDoaModel(DefaultData.defaultData[i][0],
DefaultData.defaultData[i][1]));
}
listJudul = doaHelper.getAllData();
return null;
}
#Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
mProgressDialog.dismiss();
listJudulAdapter = new ListJudulAdapter(MainActivity.this, listJudul);
lvJudul.setAdapter(listJudulAdapter);
}
}
#Override
protected void onDestroy() {
if (doaHelper != null){
doaHelper.close();
}
super.onDestroy();
}
public static void showMeaningDialog(final Activity activity, final DoaModel item) {
final Dialog dialog = new Dialog(activity, R.style.AppCompatAlertDialogStyle);
dialog.setContentView(R.layout.dialog_konten);
dialog.setCancelable(true);
TextView txtKonten = (TextView)dialog.findViewById(R.id.txtMeaning);
TextView txtJudul = (TextView)dialog.findViewById(R.id.txtWord);
Button btnTutup = (Button)dialog.findViewById(R.id.btnTutup);
Button btnEdit = (Button)dialog.findViewById(R.id.btnEdit);
txtKonten.setText(item.getKonten());
txtJudul.setText(item.getJudul());
btnEdit.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
//FormInputUpdateActivity.toFormInputUpdate(activity, item);
dialog.dismiss();
}
});
btnTutup.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
dialog.dismiss();
}
});
dialog.show();
}
private void deleteDialog(final int id) {
// TODO Auto-generated method stub
final Dialog dialog = new Dialog(MainActivity.this, R.style.AppCompatAlertDialogStyle);
dialog.setTitle("Hapus");
//dialog.setContentView(R.layout.dialog_delete);
dialog.setCancelable(true);
// Button btnYes = (Button)dialog.findViewById(R.id.btnDeleteYes);
// Button btnCancel = (Button)dialog.findViewById(R.id.btnDeleteCancel);
// btnYes.setOnClickListener(new OnClickListener() {
// public void onClick(View v) {
// // TODO Auto-generated method stub
// doaHelper.delete(id);
// dialog.dismiss();
// Toast.makeText(MainActivity.this, getString(R.string.text_success_delete), Toast.LENGTH_LONG).show();
// application.getDoaObserver().refresh();
// }
// });
//btnCancel.setOnClickListener(new View.OnClickListener() {
// public void onClick(View arg0) {
// TODO Auto-generated method stub
// dialog.dismiss();
// }
//});
dialog.show();
}
public void bindData(){
if (listJudul.size()>0) {
listJudul.clear();
}
listJudul = doaHelper.getAllData();
listJudulAdapter = new ListJudulAdapter(MainActivity.this, listJudul);
lvJudul.setAdapter(listJudulAdapter);
listJudulAdapter.notifyDataSetChanged();
}
#Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_activity_main, menu);
SearchManager searchManager =
(SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView =
(SearchView) menu.findItem(R.id.action_search).getActionView();
searchView.setSearchableInfo(
searchManager.getSearchableInfo(getComponentName()));
return true;
}
}
This is DoaApplication.java
package id.wdharmana.doahindu.app;
import android.app.Application;
import id.wdharmana.doahindu.model.DoaObserver;
/**
* Created by WDHARMANA on 9/18/2015.
*/
public class DoaApplication extends Application {
DoaObserver doaObserver;
#Override
public void onCreate() {
super.onCreate();
doaObserver = new DoaObserver();
}
public DoaObserver getDoaObserver(){
return doaObserver;
}
}
No error when build. Please tell me if you have some suggestions. Thanks in advance.
Put DoaApplication in your manifest, in the <application> node as android:name="id.wdharmana.doahindu.app.DoaApplication"
Please make sure your AndroidManifest.xml like that:
<application
android:name="id.wdharmana.doahindu.app.DoaApplication"
... >
...
</application>
I think you forgot to add your
I am implementing Google Analytics in Android App using eclipse. After lot of research i implemented it. Here is my Code:
import android.support.v7.app.ActionBarActivity;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import com.google.analytics.tracking.android.EasyTracker;
import com.google.analytics.tracking.android.MapBuilder;
import com.google.analytics.tracking.android.StandardExceptionParser;
public class MainActivity extends Activity {
private EasyTracker easyTracker = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
easyTracker = EasyTracker.getInstance(MainActivity.this);
Button btn1 = (Button) findViewById(R.id.button1);
Button btn2 = (Button) findViewById(R.id.button2);
btn1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
easyTracker.send(MapBuilder.createEvent("your_action",
"envet_name", "button_name/id", null).build());
}
});
btn2.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
try {
int a[] = new int[2];
int num = a[4];
} catch (ArrayIndexOutOfBoundsException e) {
easyTracker.send(MapBuilder.createException(
new StandardExceptionParser(MainActivity.this, null)
.getDescription(Thread.currentThread().getName(), e), false).build());
}
}
});
}
#Override
public void onStart() {
super.onStart();
EasyTracker.getInstance(this).activityStart(this);
}
#Override
public void onStop() {
super.onStop();
EasyTracker.getInstance(this).activityStop(this);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
The code compiled successfully but the problem which i am facing is that it is not sending any information in the GoogleAnalytics account.I have not received any part of information in google Analytics.
I was trying to run some test on SurfaceViewer with SurfaceViewer having its own thread and everything worked just fine. Then I changed my code to change orientation of screen using setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
In the code below: I have an activity which uses Fragments. I have another class which extends SurfaceView class. Problem starts when I add setRequestedOrientation. After I add setRequestedOrientation. Value of running at in FastRender Class run method is always false. If I comment line with setRequestedOrientation , it runs fines.
package com.example.testpractise;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.content.res.AssetManager;
import android.graphics.Canvas;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
public class SurfaceViewTest extends ActionBarActivity {
static int counter;
static {
Log.i("Intializing class Surface Test","counter");
System.out.println("Statrting here");
}
#Override
protected void onRestart() {
// TODO Auto-generated method stub
super.onRestart();
counter++;
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
counter++;
Log.i("Counter vlase",String.valueOf(counter));
System.out.println("value of counter"+counter);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_surface_view_test);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.surface_view_test, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
FastRenderView renderView;
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//View rootView = inflater.inflate(
// R.layout.fragment_surface_view_test, container, false);
getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
BitmapCollection.initializeBitMapCollection(getActivity());
renderView = new FastRenderView(getActivity());
return renderView;
}
#Override
public void onResume() {
// TODO Auto-generated method stub
super.onResume();
renderView.resume();
}
#Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
renderView.pause();
}
static class FastRenderView extends SurfaceView implements Runnable {
Thread renderThread = null;
SurfaceHolder holder;
static volatile boolean running = false;
int x=0;
int y=0;
public FastRenderView(Context context) {
super(context);
// TODO Auto-generated constructor stub
holder = getHolder();
}
public void pause()
{
running = false;
while(true)
{
try{
renderThread.join();
}catch (InterruptedException i){
}
}
}
public void resume()
{
running = true;
renderThread = new Thread(this);
renderThread.setName("RendererThread");
renderThread.start();
running=true;
}
#Override
public void run() {
// TODO Auto-generated method stub
int sleepCounter=0;
while(!running)
{
try {
if(sleepCounter <5)
{
sleepCounter++;
Thread.sleep(5000);
}else{
break;
}
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
while(running)
{
if(!holder.getSurface().isValid())
{
continue;
}
Canvas canvas=holder.lockCanvas();
canvas.drawRGB(255, 0, 0);
holder.unlockCanvasAndPost(canvas);
}
}
}
}
}
Sorry if my question doesn't match the format. This is my first time. Any pointers on what is wrong and why would be greatly appreciated.
Thanks
If you just want to lock the Activity to landscape, you can do it in Manifest by adding the android:screenOrientation="landscape" attribute to the activity element.
I've created an app (radio streaming) but doesn't works on S4.
I've tested this app on my Galaxy Nexus, Xperia Arc s, Htc Desire and it works properly.
I think there is an error in my code.
My code:
package com.dieesoft.radiolluvia;
import java.io.IOException;
import android.R.array;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.media.MediaPlayer.TrackInfo;
import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.app.ProgressDialog;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ProgressBar;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener {
private MediaPlayer mp;
private ProgressDialog pb;
private Button bplay;
private Button bstop;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
bplay = (Button) findViewById(R.id.button1);
bstop = (Button) findViewById(R.id.button2);
mp = new MediaPlayer();
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
bplay.setOnClickListener(this);
bstop.setOnClickListener(this);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(v.getId() == R.id.button1 )
{
//button play
new iniciarStreaming().execute();
Toast.makeText(this, "Play", Toast.LENGTH_SHORT).show();
}
else if(v.getId() == R.id.button2)
{
//button stop
Toast.makeText(this, "Stop", Toast.LENGTH_SHORT).show();
mp.stop();
}
}
private class iniciarStreaming extends AsyncTask<Void, Void, Boolean> implements OnPreparedListener
{
#Override
protected Boolean doInBackground(Void... params) {
// TODO Auto-generated method stub
try {
mp.setDataSource("http://makrodigital.com:8134/radiolluvia");
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mp.prepareAsync();
mp.setOnPreparedListener(this);
return null;
}
protected void onPreExecute() {
// TODO Auto-generated method stub
pb = new ProgressDialog(MainActivity.this);
pb.setMessage("Buffering...");
pb.show();
}
#Override
public void onPrepared(MediaPlayer mp) {
// TODO Auto-generated method stub
if (pb.isShowing()) {
pb.cancel();
}
mp.start();
}
}
Your streaming url (http://makrodigital.com:8134/radiolluvia) has AAC format with content-type: audio/aacp.
But audio/aacp streaming is not supported directly. Maybe previously was another link? MP3 or something else?
For playing this url you can use this library:
http://code.google.com/p/aacplayer-android/