this is my server code
i am getting an error on my android phone when i clicked the device address
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import javax.bluetooth.*;
import javax.microedition.io.*;
public class ServerSide {
//private static LocalDevice localDevice;
static LocalDevice localDevice;
DiscoveryAgent agent;
private void startServer() throws IOException{
UUID uuid = new UUID("112f8dbf1e46442292b6796539467bc9", false);
String connectionString = "btspp://localhost:" + uuid
+";name=SampleSPPServer";
//open server url
StreamConnectionNotifier streamConnNotifier =
(StreamConnectionNotifier)Connector.open( connectionString );
System.out.println("\nServer Started. Waiting for clients to
connect...");
StreamConnection connection=streamConnNotifier.acceptAndOpen();
RemoteDevice dev = RemoteDevice.getRemoteDevice(connection);
System.out.println("Remote device address:
"+dev.getBluetoothAddress());
System.out.println("Remote device name:
"+dev.getFriendlyName(true));
}
public static void main(String[] args) {
//display local device address and name
try{
localDevice = LocalDevice.getLocalDevice();
System.out.println("Address: "+localDevice.getBluetoothAddress());
System.out.println("Name: "+localDevice.getFriendlyName());
}catch(Exception e){
System.err.println(e.toString());
System.err.println(e.getStackTrace());
e.printStackTrace();}
try{
ServerSide sampleSPPServer=new ServerSide();
sampleSPPServer.startServer();
}catch(Exception e){
System.err.println(e.toString());
System.err.println(e.getStackTrace());
e.printStackTrace();}
}
}
**************************************************************
and this is my client(android) code
package client.side;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.UUID;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class ClientSideActivity extends Activity {
int REQUEST_ENABLE_BT = 0;
private BluetoothAdapter mBluetoothAdapter;
private ArrayAdapter<String> mArrayAdapter;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btn1 = (Button)findViewById(R.id.button1);
Button btn2 = (Button)findViewById(R.id.button2);
final ListView lv1 = (ListView)findViewById(R.id.listView1);
final TextView out = (TextView)findViewById(R.id.textView1);
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mArrayAdapter = new
ArrayAdapter<String>(this,android.R.layout.simple_list_item_1);
if (!mBluetoothAdapter.isEnabled()) {
Intent enableBtIntent = new
Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent,
REQUEST_ENABLE_BT);
}
out.setText(null);
btn1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
out.setText("Paired Devices");
Set<BluetoothDevice> pairedDevices =
mBluetoothAdapter.getBondedDevices();
if (pairedDevices.size() > 0){
for(BluetoothDevice device : pairedDevices){
mArrayAdapter.add(device.getName() + "\n" +
device.getAddress());
}
}
lv1.setAdapter(mArrayAdapter);
}
});
btn2.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
out.setText("Discovered Devices");
mBluetoothAdapter.startDiscovery();
Toast msg = Toast.makeText(ClientSideActivity.this, "Discovering
Devices please wait.", Toast.LENGTH_LONG);
msg.show();
final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
// When discovery finds a device
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
// Get the BluetoothDevice object from the Intent
BluetoothDevice device =
intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
// Add the name and address to an array adapter to show
in a ListView
mArrayAdapter.add(device.getAddress());
} }
};
// Register the BroadcastReceiver
IntentFilter filter = new
IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(mReceiver, filter); // Don't forget to unregister
during onDestroy
}
});
lv1.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> arg0, View arg1, int
position,long id)
{
out.setText(arg0.getItemAtPosition(position).toString());
BluetoothDevice remoteDev = (BluetoothDevice)
arg0.getItemAtPosition(position);
ConnectThread conDev = new ConnectThread(remoteDev);
conDev.start();
}
});
}
public class ConnectThread extends Thread {
private final UUID MY_UUID =
UUID.fromString("112f8dbf1e46442292b6796539467bc9");
private final BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
public ConnectThread(BluetoothDevice device) {
// Use a temporary object that is later assigned to
mmSocket,
// because mmSocket is final
BluetoothSocket tmp = null;
mmDevice = device;
try {
// MY_UUID is the app's UUID string, also used by the
server code
tmp =
device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) { }
mmSocket = tmp;
}
public void run() {
// Cancel discovery because it will slow down the
connection
mBluetoothAdapter.cancelDiscovery();
try {
// Connect the device through the socket. This will
block
// until it succeeds or throws an exception
mmSocket.connect();
} catch (IOException connectException) {
// Unable to connect; close the socket and get out
try {
mmSocket.close();
} catch (IOException closeException) { }
return;
}
// Do work to manage the connection (in a separate
thread)
}
/** Will cancel an in-progress connection, and close the
socket */
}
}
Related
Hey Android experts,
this may be a n00b like question but I'm a beginner to android and i'm struggling with displaying images in a gridview. All i need to do is display the images i have located in res/drawable when clicked on.
I currently have the following code in java
My GridView Class
package com.example.gridview;
import com.example.helloandroid.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
public class HelloGridView extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
//Where I'm struggling, I just need to find a way to display img048 and img049 from mThumbsIds when clicked on
}
});
}
}
My ImageAdapter class
package com.example.gridview;
import com.example.helloandroid.R;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
// references to our images
private Integer[] mThumbIds = {
R.drawable.img048, R.drawable.img049
};
}
Thank you SO MUCH everybody!
Hello XDA,
So I've not found anyone properly discussing this. If they do, please link me to the page and don't flame
I've been making an app for my school and so far, I've been doing alright. But now I have run into a problem which seems to be very hard to solve for me alone.
Namely, I have an EditText and a Button in one Activity and a WebView as a different Activity.
I'm trying to get the EditText String into the WebView URL (String being variable, Button initiating the WebView), but get a lot of errors, some not even related to that.
I would really appreciate it if someone could have a look at the code and help me with this
MyWebView.java:
Code:
package bas.sie.Antonius;
import android.app.Activity;
import android.os.Bundle;
import android.widget.EditText;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MyWebView extends Activity {
WebView mWebView;
EditText mEtxtStudentNum;
static String StudentNumFromHome = bas.sie.Antonius.Home.StudentNum;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.webview);
mWebView = (WebView) findViewById(R.id.webview);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.setWebViewClient(new WebViewClient());
mWebView.loadUrl("http://carmelcollegegouda.nl/site_ant/roosters/standaardroosters/Lee1_" + StudentNumFromHome + ".htm");
}
}
Home.java (Homescreen):
Code:
package bas.sie.Antonius;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class Home extends Activity {
Button mBtnStSchedule;
static EditText mEtxtStudentNum;
static final String StudentNum = mEtxtStudentNum.getText().toString();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button next = (Button) findViewById(R.id.BtnStSchedule);
next.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent myIntent = new Intent(view.getContext(), MyWebView.class);
startActivityForResult(myIntent, 0);
}
});
// TODO Auto-generated method stub
}
}
AntoniusActivity.java (Main):
Code:
package bas.sie.Antonius;
import android.app.TabActivity;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.KeyEvent;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.TabHost;
public class AntoniusActivity extends TabActivity {
WebView mWebView;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Resources res = getResources(); // Resource object to get Drawables
TabHost tabHost = getTabHost(); // The activity TabHost
TabHost.TabSpec spec; // Resusable TabSpec for each tab
Intent intent; // Reusable Intent for each tab
// Create an Intent to launch an Activity for the tab (to be reused)
intent = new Intent().setClass(this, Home.class);
// Initialize a TabSpec for each tab and add it to the TabHost
spec = tabHost.newTabSpec("home").setIndicator("Home",
res.getDrawable(R.drawable.ic_tab_home))
.setContent(intent);
tabHost.addTab(spec);
// Do the same for the other tabs
intent = new Intent().setClass(this, External.class);
spec = tabHost.newTabSpec("external").setIndicator("External",
res.getDrawable(R.drawable.ic_tab_external))
.setContent(intent);
tabHost.addTab(spec);
intent = new Intent().setClass(this, Contact.class);
spec = tabHost.newTabSpec("contact").setIndicator("Contact",
res.getDrawable(R.drawable.ic_tab_contact))
.setContent(intent);
tabHost.addTab(spec);
tabHost.setCurrentTab(2);
}
private class HelloWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
In AntoniusActivity, the private class HelloWebViewClient is underlined with yellow (never used), specifically the bit "HelloWebViewClient".
It's also throwing FC's at startup, and errors in LogCat, but I'll post those later on, as it's 10.30 PM here, and school goes on
Thanks in advance,
bassie1995
No suggestions yet?
How you doin'? Greetings from my GT-I9000!
I have trouble creating a service for a mediaplayer. I would like to have startforeground instead of this as well. But I have no proof of my service running. So I dont know if my code actually works. Can someone help me?
If someone is able to help me completely setting up my service, I may pay €5-10. I received €50 from the company to set up a developer account. So I have €25 left.
I am creating a streaming app for a radio station to listen to the internet stream.
Code:
package jonashendrickx.radioplayer.rgrfm;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
public class RadioService extends Service {
private final IBinder mBinder = new RadioBinder();
@Override
public void onCreate() {
Toast.makeText(this, "Let's Go", Toast.LENGTH_SHORT).show();
}
@Override
public IBinder onBind(Intent arg0) {
Log.e("LocalService", "Launched");
return mBinder;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("LocalService", "Received start id " + startId + ": " + intent);
return START_STICKY;
}
public class RadioBinder extends Binder {
RadioService getService() {
return RadioService.this;
}
}
}
Code:
package jonashendrickx.radioplayer.rgrfm;
import android.os.Bundle;
import android.os.IBinder;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.util.Log;
import android.view.Menu;
public class MainActivity extends Activity {
private ServiceConnection mConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName className, IBinder service) {
mRadioService = ((RadioService.RadioBinder)service).getService();
}
@Override
public void onServiceDisconnected(ComponentName className) {
mRadioService = null;
}
};
private RadioService mRadioService;
private boolean mIsBound;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
doBindService();
}
@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
protected void onDestroy() {
super.onDestroy();
doUnbindService();
}
void doBindService() {
bindService(new Intent(this, RadioService.class), mConnection, Context.BIND_AUTO_CREATE);
mIsBound = true;
Log.e("", "service started");
}
void doUnbindService() {
if (mIsBound) {
// Detach our existing connection.
unbindService(mConnection);
mIsBound = false;
}
}
}
I am trying to make an app that on launch reads the current on/off(1,0) value of /sys/class/mdnie/mdnie/negative, then changes it to "0 or 1. Someone suggested the below, and I tried it and it does nothing any help is apreciated. Obvously I am a beginner and barely know how to write code but hey gotta start somewhere, this is for a visually impaired friend to toggle negative color mode by assigning a shortcut key to the app. I think it has to do with needing root permision to edit those settings.
Code:
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import android.app.Activity;
import android.os.Bundle;
public class ToggleNegativeColorsActivity extends Activity {
private static final String FILEPATH = "/sys/class/mdnie/mdnie/negative";
@Override
public void onCreate(Bundle savedInstanceState) {
try {
String value = readFileAsString(FILEPATH);
if ("1".equals(value.trim())) {
writeStringToFile(FILEPATH, "0");
}
else {
writeStringToFile(FILEPATH, "1");
}}
catch (IOException e) {
e.printStackTrace();
}
finish();
}
// Grabbed from http://stackoverflow.com/questions/1656797/how-to-read-a-file-into-string-in-java
private String readFileAsString(String filePath) throws IOException {
StringBuffer fileData = new StringBuffer();
BufferedReader reader = new BufferedReader(
new FileReader(filePath));
char[] buf = new char[1024];
int numRead;
while((numRead=reader.read(buf)) != -1){
String readData = String.valueOf(buf, 0, numRead);
fileData.append(readData);
}
reader.close();
return fileData.toString();
}
// Grabbed from http://stackoverflow.com/questions/1053467/how-do-i-save-a-string-to-a-text-file-using-java
private void writeStringToFile(String filePath, String value) throws IOException {
PrintWriter out = new PrintWriter(filePath);
out.print(value);
out.close();
}
}
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 :
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);
}
}
I don't have a logcat since i don't test on an emulator or adb