Question

I am a total noob to android and really have very hard time understanding some concepts. I also have a little understanding of java swing. I am a bit knowledgeable about java web app using spring mvc. I am using eclipse indigo

This is what happened:

After I successfully created android app named AndroidExer I created a package com.swing.demo and placed the already running swing source code JTextAreaDemo.java (The source is from a tutorial. This is working in pure java). It seems that that android doesn’t recognize swing packages (I don’t know if I understand it correctly, please help me) because I got alot of errors and most of them says <Class name> cannot be resolved to a type. When I check for suggestions, eclipse does not include any suggestion about importing which makes me think that android doesn’t recognize swing.

I tried a bit of research and I found out that android cannot run swing.
can we run java swing and applet on android

My problem is how will I convert the simple swing demo to android. I don’t have any clue where and how to start. I really need help. BTW, the code is for JTextAreaDemo.java is down below:

JTextAreaDemo.java

package com.swing.demo;

import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class JTextAreaDemo extends JFrame implements ActionListener {

   /**
 * 
 */
private static final long serialVersionUID = 5416184196156296457L;
JTextField jtfInput;
JTextArea jtAreaOutput;
String newline = "\n";
public JTextAreaDemo() {
    createGui();
}
public void createGui() {
    jtfInput = new JTextField(20);
    jtfInput.addActionListener(this);
    jtAreaOutput = new JTextArea(5, 20);
    jtAreaOutput.setCaretPosition(jtAreaOutput.getDocument()
            .getLength());
    jtAreaOutput.setEditable(false);
    JScrollPane scrollPane = new JScrollPane(jtAreaOutput,
            JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
            JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
    GridBagLayout gridBag = new GridBagLayout();
    Container contentPane = getContentPane();
    contentPane.setLayout(gridBag);
    GridBagConstraints gridCons1 = new GridBagConstraints();
    gridCons1.gridwidth = GridBagConstraints.REMAINDER;
    gridCons1.fill = GridBagConstraints.HORIZONTAL;
    contentPane.add(jtfInput, gridCons1);
    GridBagConstraints gridCons2 = new GridBagConstraints();
    gridCons2.weightx = 1.0;
    gridCons2.weighty = 1.0;
    contentPane.add(scrollPane, gridCons2);
}
public void actionPerformed(ActionEvent evt) {
    String text = jtfInput.getText();
    jtAreaOutput.append(text + newline);
    jtfInput.selectAll();
}
public static void main(String[] args) {
    JTextAreaDemo jtfTfDemo = new JTextAreaDemo();
    jtfTfDemo.pack();
    jtfTfDemo.addWindowListener(new WindowAdapter() {

        public void windowClosing(WindowEvent e) {
            System.exit(0);
        }
    });
    jtfTfDemo.setVisible(true);
}
}

I really need your help. Thanks.

Answer 1

I don’t think you can mix those two. If you want android native app, you need to use Android API than Swing. Here is android documentation.