用Java/安卓发送选择题问卷（包括可能的答案）
大家好，我已经搜索了很多，但找不到任何满足我想为我的项目做什么的答案。也许我不知道该找什么，但他是： 项目：持续的课堂反馈
我正在尝试编写一个程序，使讲师能够（从java应用程序）向学生的手机（安卓应用程序）发送一份选择题问卷（一个包含4个可能答案的问题），这样他们就可以触摸答案，单击“提交”，然后将其发送回老师
我只是不知道怎么做。我做了单选按钮，但我被卡住了，因为我不知道如何发送它们（如果可能的话）。 还有一件事你建议我用什么来制定最适合我的计划？我用过WI-Fi，但我遇到了一个问题，每次我都要在这里和那里使用端口
我已准备好做出您建议的任何更改，但请尝试为我找到解决方案：）
这是我到目前为止的代码：（抱歉，如果我把这个问题提错了，这是我第一次这样做）
安卓软件包
欢迎。爪哇：
package mobileapp.com;
import 安卓.app.Activity;
import 安卓.content.Intent;
import 安卓.os.Bundle;
import 安卓.os.Handler;
public class Welcome extends Activity {
private Handler handler = new Handler();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.welcome);
handler.postDelayed(loadNextWindow, 3000);
}
private Runnable loadNextWindow = new Runnable(){
public void run(){
Intent intent = new Intent(Welcome.this,Answer.class);
startActivity(intent);
}
};
}
回答。爪哇：
package mobileapp.com;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import 安卓.app.Activity;
import 安卓.os.Bundle;
import 安卓.view.View;
import 安卓.view.View.OnClickListener;
import 安卓.widget.Button;
import 安卓.widget.RadioButton;
import 安卓.widget.TextView;
import 安卓.widget.Toast;
public class Answer extends Activity {
private TextView qtext;
private RadioButton rB1, rB2, rB3, rB4;
private Button sendButton, connectButton;
private Socket socket;
private String serverIpAddress = "";
private String answer;
// AND THAT'S MY DEV'T MACHINE WHERE PACKETS TO
// PORT 5000 GET REDIRECTED TO THE SERVER EMULATOR'S
// PORT 6000
private static final int REDIRECTED_SERVERPORT = 7076;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
answer = null;
super.onCreate(icicle);
setContentView(R.layout.answer);
qtext = (TextView) findViewById(R.id.textQuestion1);
rB1 = (RadioButton) findViewById(R.id.rButton1);
rB2 = (RadioButton) findViewById(R.id.rButton2);
rB3 = (RadioButton) findViewById(R.id.rButton3);
rB4 = (RadioButton) findViewById(R.id.rButton4);
sendButton = (Button) findViewById(R.id.button1);
connectButton = (Button) findViewById(R.id.button2);
connectButton.setOnClickListener(new OnClickListener(){
public void onClick(View v2) {
// TODO Auto-generated method stub
try {
BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
qtext.setText(br.toString());
}
catch (IOException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
}
});
sendButton.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
// TODO Auto-generated method stub
if (rB1.isChecked()){
Toast t= Toast.makeText(getApplicationContext(), rB1.getText().toString()+ " sent!", Toast.LENGTH_LONG);
t.show();
answer = "1st Choice";
}
if (rB2.isChecked()){
Toast t= Toast.makeText(getApplicationContext(), rB2.getText().toString()+ " sent!", Toast.LENGTH_LONG);
t.show();
answer = "2nd Choice";
}
if (rB3.isChecked()){
Toast t= Toast.makeText(getApplicationContext(), rB3.getText().toString()+ " sent!", Toast.LENGTH_LONG);
t.show();
answer = "3rd Choice";
}
if (rB4.isChecked()){
Toast t= Toast.makeText(getApplicationContext(), rB4.getText().toString()+ " sent!", Toast.LENGTH_LONG);
t.show();
answer = "4th Choice";
}
try {
InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
socket = new Socket(serverAddr, REDIRECTED_SERVERPORT);
} catch (UnknownHostException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
try {
DataOutputStream oos = new DataOutputStream(socket.getOutputStream());
oos.writeBytes(answer);
oos.close();
//Toast toast3 = Toast.makeText(getBaseContext(), "Message was sent successfully!", Toast.LENGTH_LONG);
//toast3.show();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
}
欢迎。xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 安卓:id="@+id/LinearLayout01"
安卓:layout_width="fill_parent" 安卓:layout_height="fill_parent"
xmlns:安卓="http://schemas.安卓.com/apk/res/安卓" 安卓:orientation="vertical"
安卓:background="@drawable/evening"
>
<TextView 安卓:text="@string/welcomeMessage" 安卓:layout_width="fill_parent" 安卓:layout_height="fill_parent"
安卓:textStyle="bold" 安卓:textSize="25sp" 安卓:textColor="#FFFFFF"
安卓:gravity="center"
></TextView>
</LinearLayout>
回答。xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 安卓:id="@+id/LinearLayout01"
安卓:layout_width="fill_parent" 安卓:layout_height="fill_parent"
xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
>
<ScrollView 安卓:layout_width="fill_parent" 安卓:layout_height="fill_parent" 安卓:scrollbarAlwaysDrawVerticalTrack="true"
安卓:scrollbarStyle="outsideOverlay">
<LinearLayout 安卓:id="@+id/LinearLayout02"
安卓:layout_width="fill_parent" 安卓:layout_height="fill_parent"
xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
安卓:orientation="vertical" 安卓:scrollbars="vertical" 安卓:scrollbarAlwaysDrawVerticalTrack="true"
>
<TextView 安卓:id="@+id/textQuestion1" 安卓:layout_width="fill_parent" 安卓:text="@string/textQuestion" 安卓:layout_height="wrap_content"></TextView>
<RadioGroup 安卓:id="@+id/radioGroup01"
安卓:orientation="vertical" 安卓:layout_height="wrap_content" 安卓:layout_width="fill_parent" >
<RadioButton 安卓:id="@+id/rButton1" 安卓:text="@string/c1Label" 安卓:layout_height="wrap_content" 安卓:layout_width="fill_parent"> </RadioButton>
<RadioButton 安卓:id="@+id/rButton2" 安卓:text="@string/c2Label" 安卓:layout_height="wrap_content" 安卓:layout_width="fill_parent"> </RadioButton>
<RadioButton 安卓:id="@+id/rButton3" 安卓:text="@string/c3Label" 安卓:layout_height="wrap_content" 安卓:layout_width="fill_parent"> </RadioButton>
<RadioButton 安卓:id="@+id/rButton4" 安卓:text="@string/c4Label" 安卓:layout_height="wrap_content" 安卓:layout_width="fill_parent"> </RadioButton>
</RadioGroup>
<Button 安卓:text="Submit" 安卓:id="@+id/button1" 安卓:layout_width="wrap_content" 安卓:layout_height="wrap_content"></Button>
<Button 安卓:text="Connect" 安卓:id="@+id/button2" 安卓:layout_width="wrap_content" 安卓:layout_height="wrap_content"></Button>
</LinearLayout>
</ScrollView>
</LinearLayout>
标签。xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="CodeFont">
<item name="安卓:layout_width">fill_parent</item>
<item name="安卓:layout_height">fill_parent</item>
<item name="安卓:textColor">#00FF00</item>
<item name="安卓:singleLine">false</item>
<item name="安卓:lines">2</item>
</style>
</resources>
弦。xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">Please answer quickly</string>
<string name="c1Label">First choice</string>
<string name="c2Label">Second choice</string>
<string name="c3Label">Third choice</string>
<string name="c4Label">Fourth choice</string>
<string name="welcomeMessage">Welcome!</string>
<string name="textQuestion">No question yet...</string>
</resources>
这是一个java类，用来将问题发送到安卓应用程序
服务器应用。爪哇：
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.net.*;
public class ServerApp implements Runnable {
// Connect status constants
public final static int NULL = 0;
public final static int DISCONNECTED = 1;
public final static int DISCONNECTING = 2;
public final static int BEGIN_CONNECT = 3;
public final static int CONNECTED = 4;
// Other constants
public final static String statusMessages[] = {
" Error! Could not connect!", " Disconnected",
" Disconnecting...", " Connecting...", " Connected"
};
public final static ServerApp tcpObj = new ServerApp();
public final static String END_SESSION =
new Character((char)0).toString(); // Indicates the end of a session
// Connection atate info
public static String hostIP = "localhost";
public static int port = 7076;
public static int connectionStatus = DISCONNECTED;
public static boolean isAnswerMode = true;
public static String statusString = statusMessages[connectionStatus];
public static StringBuffer toAppend = new StringBuffer("");
public static StringBuffer toSend = new StringBuffer("");
// Various GUI components and info
public static JFrame mainFrame = null;
public static JTextArea getText = null;
public static JTextField outText = null;
public static JCheckBox cbAnswer1 = null;
public static JCheckBox cbAnswer2 = null;
public static JCheckBox cbAnswer3 = null;
public static JCheckBox cbAnswer4 = null;
public static JPanel statusBar = null;
public static JLabel statusField = null;
public static JTextField statusColor = null;
public static JTextField ipField = null;
public static JTextField portField = null;
public static JRadioButton answerMode = null;
public static JRadioButton questionMode = null;
public static JButton connectButton = null;
public static JButton disconnectButton = null;
// TCP Components
public static ServerSocket hostServer = null;
public static Socket socket = null;
public static BufferedReader in = null;
public static PrintWriter out = null;
//members
public static String questionText = null;
/////////////////////////////////////////////////////////////////
private static JPanel initOptionsPane() {
JPanel pane = null;
ActionAdapter buttonListener = null;
// Create an options pane
JPanel optionsPane = new JPanel(new GridLayout(6, 1));
//Window label
pane = new JPanel(new FlowLayout(FlowLayout.LEFT));
pane.add(new JLabel("SERVER APP"));
//pane.add(ipField);
optionsPane.add(pane);
// IP address input
pane = new JPanel(new FlowLayout(FlowLayout.RIGHT));
pane.add(new JLabel("Host IP:"));
ipField = new JTextField(10);
ipField.setText(hostIP);
ipField.setEnabled(false);
ipField.addFocusListener(new FocusAdapter() {
public void focusLost(FocusEvent e) {
ipField.selectAll();
// Should be editable only when disconnected
if (connectionStatus != DISCONNECTED) {
changeStatusNTS(NULL, true);
}
else {
hostIP = ipField.getText();
}
}
});
pane.add(ipField);
optionsPane.add(pane);
// Port input
pane = new JPanel(new FlowLayout(FlowLayout.RIGHT));
pane.add(new JLabel("Port:"));
portField = new JTextField(10); portField.setEditable(true);
portField.setText((new Integer(port)).toString());
portField.addFocusListener(new FocusAdapter() {
public void focusLost(FocusEvent e) {
// should be editable only when disconnected
if (connectionStatus != DISCONNECTED) {
changeStatusNTS(NULL, true);
}
else {
int temp;
try {
temp = Integer.parseInt(portField.getText());
port = temp;
}
catch (NumberFormatException nfe) {
portField.setText((new Integer(port)).toString());
mainFrame.repaint();
}
}
}
});
pane.add(portField);
optionsPane.add(pane);
pane = new JPanel(new FlowLayout(FlowLayout.LEFT));
pane.add(new JLabel());
optionsPane.add(pane);
pane = new JPanel(new FlowLayout(FlowLayout.LEFT));
pane.add(new JLabel());
optionsPane.add(pane);
// Host/guest option
buttonListener = new ActionAdapter() {
public void actionPerformed(ActionEvent e) {
if (connectionStatus != DISCONNECTED) {
changeStatusNTS(NULL, true);
}
else {
isAnswerMode = e.getActionCommand().equals("answers");
// Cannot supply host IP if host option is chosen
if (isAnswerMode) {
ipField.setEnabled(false);
ipField.setText("localhost");
hostIP = "localhost";
}
else {
ipField.setEnabled(true);
}
}
}
};
// Connect/disconnect buttons
JPanel buttonPane = new JPanel(new GridLayout(1, 2));
buttonListener = new ActionAdapter() {
public void actionPerformed(ActionEvent e) {
// Request a connection initiation
if (e.getActionCommand().equals("connect")) {
changeStatusNTS(BEGIN_CONNECT, true);
}
// Disconnect
else {
changeStatusNTS(DISCONNECTING, true);
}
}
};
connectButton = new JButton("Connect");
connectButton.setMnemonic(KeyEvent.VK_C);
connectButton.setActionCommand("connect");
connectButton.addActionListener(buttonListener);
connectButton.setEnabled(true);
disconnectButton = new JButton("Disconnect");
disconnectButton.setMnemonic(KeyEvent.VK_D);
disconnectButton.setActionCommand("disconnect");
disconnectButton.addActionListener(buttonListener);
disconnectButton.setEnabled(false);
buttonPane.add(connectButton);
buttonPane.add(disconnectButton);
optionsPane.add(buttonPane);
return optionsPane;
}
/////////////////////////////////////////////////////////////////
// Initialize all the GUI components and display the frame
private static void initGUI() {
// Set up the status bar
statusField = new JLabel();
statusField.setText(statusMessages[DISCONNECTED]);
statusColor = new JTextField(1);
statusColor.setBackground(Color.red);
statusColor.setEditable(false);
statusBar = new JPanel(new BorderLayout());
statusBar.add(statusColor, BorderLayout.WEST);
statusBar.add(statusField, BorderLayout.CENTER);
// Set up the options pane
JPanel optionsPane = initOptionsPane();
// Set up the questions and answers pane
JPanel questionsAnswersPane = new JPanel(new GridLayout(6,1) );
questionsAnswersPane.setBorder(new EmptyBorder(4, 4, 4, 4) );
getText = new JTextArea(10, 20);
getText.setLineWrap(true);
getText.setEditable(false);
getText.setForeground(Color.blue);
getText.setBackground(Color.LIGHT_GRAY);
JScrollPane chatTextPane = new JScrollPane(getText,
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
//Question text
//JPanel pane = new JPanel(new FlowLayout(FlowLayout.LEFT));
outText = new JTextField(20);
//getLine
//pane.add(getLine);
JPanel pane2 = new JPanel(new FlowLayout(FlowLayout.LEFT));
cbAnswer1 = new JCheckBox("Answer one ........... ");
pane2.add(cbAnswer1);
JPanel pane3 = new JPanel(new FlowLayout(FlowLayout.LEFT));
cbAnswer2 = new JCheckBox("Answer two ........... ");
pane3.add(cbAnswer2);
JPanel pane4 = new JPanel(new FlowLayout(FlowLayout.LEFT));
cbAnswer3 = new JCheckBox("Answer three ........... ");
pane4.add(cbAnswer3);
JPanel pane5 = new JPanel(new FlowLayout(FlowLayout.LEFT));
cbAnswer4 = new JCheckBox("Answer four ........... ");
pane5.add(cbAnswer4);
questionsAnswersPane.add(outText, BorderLayout.NORTH);
questionsAnswersPane.add(pane2);
questionsAnswersPane.add(pane3);
questionsAnswersPane.add(pane4);
questionsAnswersPane.add(pane5);
questionsAnswersPane.add(chatTextPane, BorderLayout.SOUTH);
questionsAnswersPane.setPreferredSize(new Dimension(200, 200));
// Set up the main pane
JPanel mainPane = new JPanel(new BorderLayout());
mainPane.add(statusBar, BorderLayout.SOUTH);
mainPane.add(optionsPane, BorderLayout.WEST);
mainPane.add(questionsAnswersPane, BorderLayout.CENTER);
// Set up the main frame
mainFrame = new JFrame("Server");
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.setContentPane(mainPane);
mainFrame.setSize(mainFrame.getPreferredSize());
mainFrame.setLocation(200, 200);
mainFrame.pack();
mainFrame.setVisible(true);
}
/////////////////////////////////////////////////////////////////
// The thread-safe way to change the GUI components while
// changing state
private static void changeStatusTS(int newConnectStatus, boolean noError) {
// Change state if valid state
if (newConnectStatus != NULL) {
connectionStatus = newConnectStatus;
}
// If there is no error, display the appropriate status message
if (noError) {
statusString = statusMessages[connectionStatus];
}
// Otherwise, display error message
else {
statusString = statusMessages[NULL];
}
// Call the run() routine (Runnable interface) on the
// error-handling and GUI-update thread
SwingUtilities.invokeLater(tcpObj);
}
/////////////////////////////////////////////////////////////////
// The non-thread-safe way to change the GUI components while
// changing state
private static void changeStatusNTS(int newConnectStatus, boolean noError) {
// Change state if valid state
if (newConnectStatus != NULL) {
connectionStatus = newConnectStatus;
}
// If there is no error, display the appropriate status message
if (noError) {
statusString = statusMessages[connectionStatus];
}
// Otherwise, display error message
else {
statusString = statusMessages[NULL];
}
// Call the run() routine (Runnable interface) on the
// current thread
tcpObj.run();
}
/////////////////////////////////////////////////////////////////
// Thread-safe way to append to the chat box
private static void appendToChatBox(String s) {
synchronized (toAppend) {
toAppend.append(s);
}
}
/////////////////////////////////////////////////////////////////
// private static void sendString(String s) {
// synchronized (toSend) {
// toSend.append(s + "\n");
// }
//}
/////////////////////////////////////////////////////////////////
// Cleanup for disconnect
private static void cleanUp() {
try {
if (hostServer != null) {
hostServer.close();
hostServer = null;
}
}
catch (IOException e) { hostServer = null; }
try {
if (socket != null) {
socket.close();
socket = null;
}
}
catch (IOException e) { socket = null; }
try {
if (in != null) {
in.close();
in = null;
}
}
catch (IOException e) { in = null; }
if (out != null) {
out.close();
out = null;
}
}
/////////////////////////////////////////////////////////////////
// Checks the current state and sets the enables/disables
// accordingly
public void run() {
switch (connectionStatus) {
case DISCONNECTED:
// this line is here for testing purposes
questionText = null;
connectButton.setEnabled(true);
disconnectButton.setEnabled(false);
ipField.setEnabled(true);
portField.setEnabled(true);
//answerMode.setEnabled(true);
//questionMode.setEnabled(true);
//getLine.setText("");
//getLine.setEnabled(false);
statusColor.setBackground(Color.red);
break;
case DISCONNECTING:
connectButton.setEnabled(false);
disconnectButton.setEnabled(false);
ipField.setEnabled(false);
portField.setEnabled(false);
//answerMode.setEnabled(false);
//questionMode.setEnabled(false);
//getLine1.setEnabled(false);
statusColor.setBackground(Color.orange);
break;
case CONNECTED:
// this line is here for testing purposes
questionText = outText.getText() ;
connectButton.setEnabled(false);
disconnectButton.setEnabled(true);
ipField.setEnabled(false);
portField.setEnabled(false);
//answerMode.setEnabled(false);
//questionMode.setEnabled(false);
//getLine.setEnabled(true);
statusColor.setBackground(Color.green);
break;
case BEGIN_CONNECT:
connectButton.setEnabled(false);
disconnectButton.setEnabled(false);
ipField.setEnabled(false);
portField.setEnabled(false);
//answerMode.setEnabled(false);
//questionMode.setEnabled(false);
//getLine.setEnabled(false);
//getLine.grabFocus();
statusColor.setBackground(Color.orange);
break;
}
// Make sure that the button/text field states are consistent
// with the internal states
ipField.setText(hostIP);
portField.setText((new Integer(port)).toString());
//answerMode.setSelected(isAnswerMode);
//questionMode.setSelected(!isAnswerMode);
statusField.setText(statusString);
getText.append(toAppend.toString());
toAppend.setLength(0);
mainFrame.repaint();
}
/////////////////////////////////////////////////////////////////
// The main procedure
public static void main(String args[]) {
String s;
initGUI();
while (true) {
switch (connectionStatus) {
case BEGIN_CONNECT:
try {
// Try to set up a server if host
//if (isAnswerMode) {
hostServer = new ServerSocket(port);
socket = hostServer.accept();
//}
in = new BufferedReader(new
InputStreamReader(socket.getInputStream()));
out = new PrintWriter(socket.getOutputStream(), true);
changeStatusTS(CONNECTED, true);
}
// If error, clean up and output an error message
catch (IOException e) {
cleanUp();
changeStatusTS(DISCONNECTED, false);
}
break;
case CONNECTED:
try {
// Receive data
if (in.ready()) {
s = in.readLine();
if ((s != null) && (s.length() != 0)) {
if (s.equalsIgnoreCase("q"))
{
out.print(questionText);
out.flush();
toSend.setLength(0);
changeStatusTS(NULL, true);
}else
{
appendToChatBox("Answer: " + s + "\n");
changeStatusTS(NULL, true);
}
}
}
}
catch (IOException e) {
cleanUp();
changeStatusTS(DISCONNECTED, false);
}
break;
case DISCONNECTING:
// Tell other chatter to disconnect as well
out.print(END_SESSION);
out.flush();
// Clean up (close all streams/sockets)
cleanUp();
changeStatusTS(DISCONNECTED, true);
break;
default:
break; // do nothing
}
}
}
}
////////////////////////////////////////////////////////////////////
// Action adapter for easy event-listener coding
class ActionAdapter implements ActionListener {
public void actionPerformed(ActionEvent e) {}
}
////////////////////////////////////////////////////////////////////
提前非常感谢您的时间和帮助
# 1 楼答案
套接字连接将与协议一样正常工作。我建议您编写一个自定义类，通过存储问题/答案数据的连接发送，我使用它向文本冒险服务器发送文本命令，您可以让它发送整数，然后将它们转换为服务器端的字符串