package com.blogspot.android_er.androidchatserver;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
public class MainActivity extends AppCompatActivity {
static final int SocketServerPORT = 8080;
TextView infoIp, infoPort, chatMsg;
Spinner spUsers;
ArrayAdapter<ChatClient> spUsersAdapter;
Button btnSentTo;
String msgLog = "";
List<ChatClient> userList;
ServerSocket serverSocket;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
infoIp = (TextView) findViewById(R.id.infoip);
infoPort = (TextView) findViewById(R.id.infoport);
chatMsg = (TextView) findViewById(R.id.chatmsg);
spUsers = (Spinner) findViewById(R.id.spusers);
userList = new ArrayList<ChatClient>();
spUsersAdapter = new ArrayAdapter<ChatClient>(
MainActivity.this, android.R.layout.simple_spinner_item, userList);
spUsersAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spUsers.setAdapter(spUsersAdapter);
btnSentTo = (Button)findViewById(R.id.sentto);
btnSentTo.setOnClickListener(btnSentToOnClickListener);
infoIp.setText(getIpAddress());
ChatServerThread chatServerThread = new ChatServerThread();
chatServerThread.start();
}
View.OnClickListener btnSentToOnClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
ChatClient client = (ChatClient)spUsers.getSelectedItem();
if(client != null){
String dummyMsg = "Dummy message from server. ";
client.chatThread.sendMsg(dummyMsg);
msgLog += "- Dummy message to " + client.name + " ";
chatMsg.setText(msgLog);
}else{
Toast.makeText(MainActivity.this, "No user connected", Toast.LENGTH_LONG).show();
}
}
};
@Override
protected void onDestroy() {
super.onDestroy();
if (serverSocket != null) {
try {
serverSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
private class ChatServerThread extends Thread {
@Override
public void run() {
Socket socket = null;
try {
serverSocket = new ServerSocket(SocketServerPORT);
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
infoPort.setText("Im waiting here: "
+ serverSocket.getLocalPort());
}
});
while (true) {
socket = serverSocket.accept();
ChatClient client = new ChatClient();
userList.add(client);
ConnectThread connectThread = new ConnectThread(client, socket);
connectThread.start();
runOnUiThread(new Runnable() {
@Override
public void run() {
spUsersAdapter.notifyDataSetChanged();
}
});
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (socket != null) {
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
private class ConnectThread extends Thread {
Socket socket;
ChatClient connectClient;
String msgToSend = "";
ConnectThread(ChatClient client, Socket socket){
connectClient = client;
this.socket= socket;
client.socket = socket;
client.chatThread = this;
}
@Override
public void run() {
DataInputStream dataInputStream = null;
DataOutputStream dataOutputStream = null;
try {
dataInputStream = new DataInputStream(socket.getInputStream());
dataOutputStream = new DataOutputStream(socket.getOutputStream());
String n = dataInputStream.readUTF();
connectClient.name = n;
msgLog += connectClient.name + " connected@" +
connectClient.socket.getInetAddress() +
":" + connectClient.socket.getPort() + " ";
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
chatMsg.setText(msgLog);
}
});
dataOutputStream.writeUTF("Welcome " + n + " ");
dataOutputStream.flush();
broadcastMsg(n + " join our chat. ");
while (true) {
if (dataInputStream.available() > 0) {
String newMsg = dataInputStream.readUTF();
msgLog += n + ": " + newMsg;
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
chatMsg.setText(msgLog);
}
});
broadcastMsg(n + ": " + newMsg);
}
if(!msgToSend.equals("")){
dataOutputStream.writeUTF(msgToSend);
dataOutputStream.flush();
msgToSend = "";
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (dataInputStream != null) {
try {
dataInputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (dataOutputStream != null) {
try {
dataOutputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
userList.remove(connectClient);
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
spUsersAdapter.notifyDataSetChanged();
Toast.makeText(MainActivity.this,
connectClient.name + " removed.", Toast.LENGTH_LONG).show();
msgLog += "-- " + connectClient.name + " leaved ";
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
chatMsg.setText(msgLog);
}
});
broadcastMsg("-- " + connectClient.name + " leaved ");
}
});
}
}
private void sendMsg(String msg){
msgToSend = msg;
}
}
private void broadcastMsg(String msg){
for(int i=0; i<userList.size(); i++){
userList.get(i).chatThread.sendMsg(msg);
msgLog += "- send to " + userList.get(i).name + " ";
}
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
chatMsg.setText(msgLog);
}
});
}
private String getIpAddress() {
String ip = "";
try {
Enumeration<NetworkInterface> enumNetworkInterfaces = NetworkInterface
.getNetworkInterfaces();
while (enumNetworkInterfaces.hasMoreElements()) {
NetworkInterface networkInterface = enumNetworkInterfaces
.nextElement();
Enumeration<InetAddress> enumInetAddress = networkInterface
.getInetAddresses();
while (enumInetAddress.hasMoreElements()) {
InetAddress inetAddress = enumInetAddress.nextElement();
if (inetAddress.isSiteLocalAddress()) {
ip += "SiteLocalAddress: "
+ inetAddress.getHostAddress() + " ";
}
}
}
} catch (SocketException e) {
// TODO Auto-generated catch block
e.printStackTrace();
ip += "Something Wrong! " + e.toString() + " ";
}
return ip;
}
class ChatClient {
String name;
Socket socket;
ConnectThread chatThread;
@Override
public String toString() {
return name + ": " + socket.getInetAddress().getHostAddress();
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android_layout_width="match_parent"
android_layout_height="match_parent"
android_padding="16dp"
android_orientation="vertical"
tools_context="com.blogspot.android_er.androidchatserver.MainActivity">
<TextView
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_layout_gravity="center_horizontal"
android_autoLink="web"
android_text="http://android-er.blogspot.com/"
android_textStyle="bold" />
<TextView
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_text="Char Server"
android_textStyle="bold" />
<TextView
android_id="@+id/infoport"
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_textStyle="italic" />
<TextView
android_id="@+id/infoip"
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_textStyle="italic" />
<Spinner
android_id="@+id/spusers"
android_layout_width="match_parent"
android_layout_height="wrap_content"/>
<Button
android_id="@+id/sentto"
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_text="Sent msg to individual user"/>
<ScrollView
android_layout_width="match_parent"
android_layout_height="match_parent" >
<TextView
android_id="@+id/chatmsg"
android_layout_width="wrap_content"
android_layout_height="wrap_content" />
</ScrollView>
</LinearLayout>
Download the server side files (Android Studio Format) .Download the client side files (Android Studio Format) .
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", MODE="0666", GROUP="plugdev"
This is essential. Its fine if English isnt your first language, its not if I have to rewrite all your posts. Your grammar and variety of vocabulary must be at an advanced level.
Technologies
emulator: ERROR: Couldnt find crash service executable
C:UsersuserAppDataLocalAndroidsdk oolsemulator64-crash-service.exe
...
package com.blogspot.android_er.androidcolorfilter;
import android.graphics.ColorFilter;
import android.graphics.ColorMatrixColorFilter;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ImageView;
import android.widget.SeekBar;
public class MainActivity extends AppCompatActivity {
ImageView imageView;
SeekBar redBar, greenBar, blueBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView = (ImageView)findViewById(R.id.iv);
redBar = (SeekBar)findViewById(R.id.redbar);
greenBar = (SeekBar)findViewById(R.id.greenbar);
blueBar = (SeekBar)findViewById(R.id.bluebar);
redBar.setOnSeekBarChangeListener(colorBarChangeListener);
greenBar.setOnSeekBarChangeListener(colorBarChangeListener);
blueBar.setOnSeekBarChangeListener(colorBarChangeListener);
setColorFilter(imageView);
}
SeekBar.OnSeekBarChangeListener colorBarChangeListener
= new SeekBar.OnSeekBarChangeListener(){
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
setColorFilter(imageView);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
};
private void setColorFilter(ImageView iv){
/*
* 5x4 matrix for transforming the color+alpha components of a Bitmap.
* The matrix is stored in a single array, and its treated as follows:
* [ a, b, c, d, e,
* f, g, h, i, j,
* k, l, m, n, o,
* p, q, r, s, t ]
*
* When applied to a color [r, g, b, a], the resulting color is computed
* as (after clamping)
* R = a*R + b*G + c*B + d*A + e;
* G = f*R + g*G + h*B + i*A + j;
* B = k*R + l*G + m*B + n*A + o;
* A = p*R + q*G + r*B + s*A + t;
*/
float redValue = ((float)redBar.getProgress())/255;
float greenValue = ((float)greenBar.getProgress())/255;
float blueValue = ((float)blueBar.getProgress())/255;
float[] colorMatrix = {
redValue, 0, 0, 0, 0, //red
0, greenValue, 0, 0, 0, //green
0, 0, blueValue, 0, 0, //blue
0, 0, 0, 1, 0 //alpha
};
ColorFilter colorFilter = new ColorMatrixColorFilter(colorMatrix);
iv.setColorFilter(colorFilter);
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android_layout_width="match_parent"
android_layout_height="match_parent"
android_padding="16dp"
android_orientation="vertical"
tools_context=".MainActivity">
<TextView
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_layout_gravity="center_horizontal"
android_autoLink="web"
android_text="http://android-er.blogspot.com/"
android_textStyle="bold" />
<ImageView
android_id="@+id/iv"
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_src="@mipmap/ic_launcher"/>
<SeekBar
android_id="@+id/redbar"
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_max="255"
android_progress="255"/>
<SeekBar
android_id="@+id/greenbar"
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_max="255"
android_progress="255"/>
<SeekBar
android_id="@+id/bluebar"
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_max="255"
android_progress="255"/>
</LinearLayout>
package com.blogspot.android_er.androidhttpserver;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.EditText;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.util.Enumeration;
public class MainActivity extends AppCompatActivity {
EditText welcomeMsg;
TextView infoIp;
TextView infoMsg;
String msgLog = "";
ServerSocket httpServerSocket;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
welcomeMsg = (EditText) findViewById(R.id.welcomemsg);
infoIp = (TextView) findViewById(R.id.infoip);
infoMsg = (TextView) findViewById(R.id.msg);
infoIp.setText(getIpAddress() + ":"
+ HttpServerThread.HttpServerPORT + " ");
HttpServerThread httpServerThread = new HttpServerThread();
httpServerThread.start();
}
@Override
protected void onDestroy() {
super.onDestroy();
if (httpServerSocket != null) {
try {
httpServerSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private String getIpAddress() {
String ip = "";
try {
Enumeration<NetworkInterface> enumNetworkInterfaces = NetworkInterface
.getNetworkInterfaces();
while (enumNetworkInterfaces.hasMoreElements()) {
NetworkInterface networkInterface = enumNetworkInterfaces
.nextElement();
Enumeration<InetAddress> enumInetAddress = networkInterface
.getInetAddresses();
while (enumInetAddress.hasMoreElements()) {
InetAddress inetAddress = enumInetAddress.nextElement();
if (inetAddress.isSiteLocalAddress()) {
ip += "SiteLocalAddress: "
+ inetAddress.getHostAddress() + " ";
}
}
}
} catch (SocketException e) {
// TODO Auto-generated catch block
e.printStackTrace();
ip += "Something Wrong! " + e.toString() + " ";
}
return ip;
}
private class HttpServerThread extends Thread {
static final int HttpServerPORT = 8888;
@Override
public void run() {
Socket socket = null;
try {
httpServerSocket = new ServerSocket(HttpServerPORT);
while(true){
socket = httpServerSocket.accept();
HttpResponseThread httpResponseThread =
new HttpResponseThread(
socket,
welcomeMsg.getText().toString());
httpResponseThread.start();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
private class HttpResponseThread extends Thread {
Socket socket;
String h1;
HttpResponseThread(Socket socket, String msg){
this.socket = socket;
h1 = msg;
}
@Override
public void run() {
BufferedReader is;
PrintWriter os;
String request;
try {
is = new BufferedReader(new InputStreamReader(socket.getInputStream()));
request = is.readLine();
os = new PrintWriter(socket.getOutputStream(), true);
String response =
"<html><head></head>" +
"<body>" +
"<h1>" + h1 + "</h1>" +
"</body></html>";
os.print("HTTP/1.0 200" + " ");
os.print("Content type: text/html" + " ");
os.print("Content length: " + response.length() + " ");
os.print(" ");
os.print(response + " ");
os.flush();
InetAddress clientInetAddressBeforeClose = socket.getInetAddress();
socket.close();
InetAddress clientInetAddressAfterClose = socket.getInetAddress();
msgLog += "Request: " + request + " ";
if(clientInetAddressBeforeClose == null){
msgLog += "clientInetAddressBeforeClose == null ";
}else{
msgLog += "clientInetAddressBeforeClose = " + clientInetAddressBeforeClose.toString() + " ";
}
if(clientInetAddressAfterClose == null){
msgLog += "clientInetAddressAfterClose == null ";
}else{
msgLog += "clientInetAddressAfterClose = " + clientInetAddressAfterClose.toString() + " ";
}
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
infoMsg.setText(msgLog);
}
});
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return;
}
}
}
package com.blogspot.android_er.androidscannetworkinterface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Enumeration;
public class MainActivity extends AppCompatActivity {
private Button btnScan;
private ListView listViewNI;
ArrayList<String> niList;
ArrayAdapter<String> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnScan = (Button)findViewById(R.id.scan);
listViewNI = (ListView)findViewById(R.id.listviewni);
niList = new ArrayList();
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, android.R.id.text1, niList);
listViewNI.setAdapter(adapter);
btnScan.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new ScanNITask().execute();
}
});
}
private class ScanNITask extends AsyncTask<Void, String, Void> {
@Override
protected void onPreExecute() {
niList.clear();
adapter.notifyDataSetInvalidated();
}
@Override
protected Void doInBackground(Void... params) {
try {
Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
while (networkInterfaces.hasMoreElements()) {
NetworkInterface thisInterface = networkInterfaces.nextElement();
Enumeration<InetAddress> inetAddresses = thisInterface.getInetAddresses();
if (inetAddresses.hasMoreElements()) {
String niInfo = thisInterface.getDisplayName() + " ";
while (inetAddresses.hasMoreElements()) {
InetAddress thisAddress = inetAddresses.nextElement();
niInfo += "--- ";
niInfo += "Address: " + thisAddress.getAddress() + " ";
niInfo += "CanonicalHostName: " + thisAddress.getCanonicalHostName() + " ";
niInfo += "HostAddress: " + thisAddress.getHostAddress() + " ";
niInfo += "HostName: " + thisAddress.getHostName() + " ";
}
publishProgress(niInfo);
}
}
} catch (SocketException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onProgressUpdate(String... values) {
niList.add(values[0]);
adapter.notifyDataSetInvalidated();
}
@Override
protected void onPostExecute(Void aVoid) {
Toast.makeText(MainActivity.this, "Done", Toast.LENGTH_LONG).show();
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android_layout_width="match_parent"
android_layout_height="match_parent"
android_padding="16dp"
android_orientation="vertical"
tools_context=".MainActivity">
<TextView
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_layout_gravity="center_horizontal"
android_autoLink="web"
android_text="http://android-er.blogspot.com/"
android_textStyle="bold" />
<Button
android_id="@+id/scan"
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_text="Scan"/>
<ListView
android_id="@+id/listviewni"
android_layout_width="match_parent"
android_layout_height="wrap_content"/>
</LinearLayout>
