3 Using Sample Projects

3.6.1.1 Image Effects

This MIDlet demonstrates standard image processing operations.

• Select the Image Effects MIDlet and press the Launch soft button.

• Choose input and output image formats, and press Done. The input image and output images are displayed simultaneously.

• Choose an effect from the Menu and click the Done button to apply a transformation, effect or overlay. The source image is shown above and the processed image is shown below. Note that some items, Set Transforms, for example, can perform several operations in a single transaction.

  The menu options are as follows:

  1. Set Effect Order - Specify the order in which transforms, effects and overlays are applied.

  2. Set Transforms - Change width and height scale, border, and rotation options.

  3. Set Overlays - Specify the color and orientation of a color block overlay.

  4. Reset - Set transforms, effects, and overlays to the initial state.

  5. Monochrome Effects - Activate grayscale rendering.

  6. Negative Effect -Reverse dark and light areas.

3.6.1.2 Camera

This MIDlet demonstrates how the Advanced Multimedia Supplements provide control of a device's camera. The screen shows the viewfinder of the camera (simulated with a movie). You can use commands in the menu to change the camera settings and take and manage snapshots.

1. Exit - Close this MIDlet and return to the initial window.

2. Snapshot setting - Set whether to display the snapshot on the screen or print it to a file. If the picture is saved to a file, set the snapshot action: Freeze the viewfinder, Freeze and confirm (soft button prompts you to save and you get a confirmation), Save without freezing (set the picture number). Snapshots are stored in userhome\javame-sdk\3.0.5\work\emulator_number\appdb\filesystem\root1.

3. Disable/Enable shutter feedback.

4. Choose exposure modes - Preset modes are auto, landscape, snow, beach, sunset, night, fireworks, portrait, backlight, spotlight, sports, text.

5. Change F_Stop number - 0, 400, 560, 800, 1600.

6. Set flash mode - Off, AUTO, AUTO_WITH_REDEYEREDUCE, FORCE, FORCE_WITH_REDEYEREDUCE, FILLIN.

7. View gallery - View the snapshots stored in: userhome\javame-sdk\3.0.5\work\emulator_number\appdb\filesystem\root1.

8. Zoom settings - digital and optical zoom settings 100-300 in increments of 20.

3.6.1.3 Moving Helicopter

Simulates a helicopter (red dot) flying around a stationary observer (blue dot). Use headphones for best results. You can control the parameters of the simulation with the soft menu options: Volume, Location settings, Spectator orientation, and Distance Attenuation settings. After viewing menu options, press the close button (the X on the right) to return to the helicopter scenario.

With the Location settings be aware that supplying large values for the screen width or flight altitude means the helicopter might be out of range - that is, it will fly off the screen and you might not be able to hear it.

For spectator orientation stereo headphones or speakers will help detect the difference in position, assuming your volume and location settings put the helicopter in audible range. The same is true for the Distance Attenuation settings, which allow you to control the doppler effect.

3.6.1.4 Music Effects

Demonstrates the advanced audio capabilities of the Advanced Multimedia Supplements. As an audio file loops continuously, you can adjust the volume, and reverberation settings.

3.6.2.1 Colors

This application displays a large horizontal rectangle that runs the width of the screen. Below, ten small vertical rectangles span the screen. Finally, three horizontal color bars indicate values for blue, green, and red (RGB). Values are expressed as decimal (0-255) or hexadecimal (00-ff) based on the first menu selection.

• To select a vertical bar to change, use the up navigation arrow to move to the color bars. Use the right navigation arrow to highlight a color bar. The large rectangle becomes the color of the selected bar.

• Use the up or down selection arrows to choose the value to change (red, green, or blue). Use the left or right arrow keys to increase or decrease the selected value. The second menu item allows you to jump in increments of 4 (Fine) or 32 (coarse).

• You can change the color on any or all of the vertical bars.

3.6.2.2 Properties

This MIDlet displays your system property values. The output is similar to the following values:

Free Memory = 2333444
Total Memory = 4194304
microedition.configuration = "CLDC-1.1"
microedition.profiles = "MIDP-2.1"
microedition.platform = "j2me"
microedition.platform = "en-US"
microedition.platform = "IS08859_1"

3.6.2.3 Http

This test application uses an HTTP connection to request a web page. The request is issued with HTTP protocol GET or POST methods. If the HEAD method is used, the head properties are read from the request.

Preparing to Run the Demo

Before beginning, examine your settings as follows.

• Right-click on Demos and select Properties.

  • Select the Running category.

  • Select Regular Execution.

  • Check Specify the Security Domain and select Maximum.

  • Click OK.

• If you are using a proxy server, you must configure the emulator's proxy server settings as described in Section 3.4, "Configuring the Web Browser and Proxy Settings". The HTTP version must be 1.1.

• If you are running antivirus software, you might need to create a rule that allows this MIDlet to allow connections to and from a specific web site. See Section 3.2, "Troubleshooting".

Running the Demo

Launch the Http MIDlet. To test, choose the Menu soft key and choose Get, Post, or Head to test the selected URL.

Http Test returns the information it is able to obtain. If the information fills the screen use the down arrow to scroll to the end. The amount of information depends on the type of request and on the amount of META information the page provides. To provide body information or content, the page must declare CONTENT-LENGTH as described in RFC 2616.

Using Menu Options

Use the Menu soft key to choose an action. The Menu items vary depending on the screen you are viewing.

• Choose Qwerty to set the input type. This activates a submenu with the options Qwerty, 123, Abc, Predict, and Symbols. This choice is present if you have the option to edit a URL (select Choose, then click the Add soft button).

• Choose GET or press the Get soft key to retrieve data from the selected URI.

• Choose POST to retrieve the post information from the server handling the selected page.

• Choose HEAD to retrieve only the META information from the headers for the selected URI.

• Select Choose to bring up the current list of web pages. You can chose a different page or add your own page to the list. To specify a new URL, choose the Add soft button. The screen displays http://. Type in the rest of the URL. If necessary select Qwerty on the menu and choose a different input method. Make sure to end with a slash (/). For example http://www.internetnews.com/. Press the OK soft button. The Http Test screen shows your new URL and prompts for an action.

3.6.2.4 FontTestlet

This MIDlet shows the various fonts available: Proportional, Regular, Regular Italic, Bold Plain, and Bold Italic. Choose 1 or 2 from the menu to toggle between the system font (sans serif) and the monospace font.

3.6.2.5 Stock

Like the Http demonstration, this sample uses an HTTP connection to obtain information. Use the same preparation steps as Section 3.6.2.3, "Http".

Run the Demos project and launch the Stock MIDlet.

By default, the screen displays an empty ticker bar at the top. Below the ticker, the menu list shows four applications: Stock Tracker, What If? Alerts, and Settings. You must add stock symbols before you can use the first three applications.

Add Stock Symbols to the Ticker

To add a stock symbol to the ticker, use the navigation arrows to select Settings.

Select Add Stock.

The display prompts you to enter a stock symbol. Type ORCL and select the Done soft key. The stock you added and its current value is now displayed in the ticker. Add a few more stock symbols, such as IBM and HPQ.

Change the Update Interval

By default the update interval is 15 minutes. Select Updates to change the interval. Use the navigation arrows to select one of Continuous, 15 minutes, 30 minutes, one hour, or three hours. Select the Done soft key.

Remove a Stock

Select Remove a Stock. You see a list of the stocks you have added. Use the navigation keys to select one or more stocks to remove. Choose the Done soft key.

Stock Tracker

Stock Tracker displays a list of the stocks you added and their current values. Stock tracker displays additional information about the selected stock, for example, the last trade and the high and low values.

Choose a stock and press Select.

What If?

What If? is an application that asks for the original purchase price and the number of shares you own. It calculates your profit or loss based on the current price.

Select a stock symbol.

Enter the purchase price and the number of shares, then press Calc.

Alerts

This application sends you a notification when the price changes to a value you specify.

From the main menu, select Alerts.

Select Add.

Choose a Stock. The screen prompts, "Alert me when a stock reaches". Enter an integer.

The alert is placed on the Current Alerts list. To remove an alert, press Remove and select the alert. Choose the Done soft key.

When the value is reached you will hear a ring and receive a message. For example, Symbol has reached your price point of $value and is currently trading at $current_value. Once the alert is triggered it disappears from the Current Alerts list.

3.6.2.6 Tickets

This demonstrates how an online ticket auction application might behave. The home screen displays a ticket ticker across the top. Click Done to continue to the Welcome To Tickets page. The Choose a Band field displays BootWare & Friends by default.

Choose a band from the dropdown menu. The available auction appears.

Select Make a Bid from the menu. Use the arrow keys to move from field to field. Fill out each field, then select the Next soft key. The application asks you to confirm your bid. Press the Submit soft key or use the arrow keys to highlight Submit then press Select. You receive a Confirmation number. Click Bands to return to the Bands page.

Select set an alert, select Set an Alert from the soft Menu. In the bid field type in a value higher than the current bid and click the Save soft key. You are returned to the Choose a Band page. You can trigger the alert by making a bid that exceeds your alert value. Your settings determine how often the application checks for changes, so the alert may not sound for a few minutes.

To add a band to the Choose a Band dropdown list, select the Menu soft key and choose Add Bands. Type in a band name or a comma-separated list of names. Choose the Save soft key. After confirmation you are returned to the Welcome To Tickets page. The added band(s) are displayed at the end of the Choose a Band drop-down menu.

Note, this is only a demonstration. To fully describe the band you must edit the following file:

installdir\apps\Demos\src\example\auction\NewTicketAuction.java.

To remove a band, select the Menu soft key and Remove Bands. Check a box for one or more bands. Choose the Save soft key.

To display the current settings for ticker display, updates, alert volume, and date, select the Menu soft key and choose 6. If desired, use the arrow keys and the select key to change these values. Choose the Save soft key.

3.6.2.7 ManyBalls

This MIDlet starts with one ball traveling the screen. Use the up and down arrows to accelerate or decelerate the ball speed (fps). Use the right or left arrows to increase or decrease the number of balls.

3.6.2.8 MiniColor

This MIDlet sets an RGB value. Use navigation keys to change color values.

Keyboard controls work as you would expect. First cursor up or down to highlight a color, and then use left and right keys to lower and raise the value of the selected color.

3.6.2.9 Chooser

The Chooser application uses a variety of controls to change text color, background color, and fonts.

• Choose Menu > Text Color. Change the color as described for MiniColor and select the OK soft button.

• Choose Menu > Background Color. Change the color as described for MiniColor and select the OK soft button.

• Choose Menu > Fonts. You can change the font Face, Style, and Size.

  Cursor up and down to highlight a property, then select. The left and right keys jump between lists. Up and down keys move item by item.

  Click OK to continue.

3.6.2.10 HttpExample

This sample makes an HTTP communication. A popup confirms the transaction was successful.

3.6.2.11 HttpView

This application displays three predefined URLs.

Choose a URL, and press the soft buttons to cycle through Head, Headers, Requests, and Errors.

Alternatively, Use the menu options.

3.6.2.12 PushExample

This application simulates a feed. As soon as you connect, you receive and display a graphic. Select Done to continue.

3.6.5.1 Socket Demo

In this application one emulator acts as the socket server, and the other as the socket client.

1. In the first emulator, launch the application, then select the Server peer. Choose Start. Depending on your security settings, you might see a message explaining that the demo wants to send and receive data over the network and it might ask, "Is it OK to use network?" Choose Yes. The Socket Server displays a status message when the connection is accepted.

2. In the second emulator, launch the application, select the Client peer, then choose Start. Depending on your security settings, you might see a message explaining that the demo wants to send and receive data over the network and it might ask, "Is it OK to use network?" Choose Yes. Choose Start to launch the client. The Socket Client displays a status message that indicates it is connected to the server. Use the down navigation arrow to highlight the Send box. Type a message in the Send box, then choose the Send soft key.

   For example, in the client, type Hello Server in the Send box. Choose Send from the menu. The server emulator activates a blue light when the message is received.

3. On the emulator running the Socket Server, the status reads: Message received - Hello Server. You can use the down arrow to move to the Send box and type a reply. For example, Hello Client, I heard you. From the menu, select Send.

4. Back in the Socket Client, the status is: Message received - Hello Client, I heard you. Until you send a new message, the Send box contains the previous message you sent.

3.6.5.2 Datagram Demo

This demo is similar to Socket Demo. Run two instances of the emulator. One acts as the datagram server, and the other as the datagram client.

1. In the first emulator, launch Datagram Demo, then select the Server peer. Choose Start. Depending on your security settings, you might see a message explaining that the demo wants to send and receive data over the network and it might ask, "Is it OK to use network?" Choose Yes. Initially, the Datagram Server status is Waiting for connection, and the Send box is empty.

2. In the second emulator, launch Datagram Demo, select the Client peer, then choose Start. Depending on your security settings, you might see a message explaining that the demo wants to send and receive data over the network and it might ask, "Is it OK to use network?" Choose Yes. The Datagram Client status is: Connected to server on port 5555. Use the down navigation arrow to highlight the Send box. Type a message in the Send box, then choose the Send from the menu. For example, type Hello datagram server.

3. On the emulator running the Datagram Server, the status displays: Message received - Hello datagram server. You can use the down arrow to move to the Send box and type a reply to the client.

4. In the Datagram Client, the status field displays the message received from the server. The Send box contains the last message you sent.