J2ME 聲音處理入門：MMAPI 播放 WAV/MID/MP3 完整範例

MMAPI 簡介

Mobile Media API (MMAPI) 是 MIDP 1.0 可選包，MIDP 2.0 已內建。常見支援格式：WAV、MID、MP3（具體視手機而定）。

播放流程三步驟

1. 以流形式讀取聲音文件：InputStream is = getClass().getResourceAsStream("/Autorun.wav");
2. 創建 Player：Player player = Manager.createPlayer(is, "audio/x-wav");
3. 啟動播放：player.start(); 可用 setLoopCount() 設定循環次數

完整 MIDlet 範例

package sound;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.media.*;
import java.io.*;

public class SoundMIDlet extends MIDlet {
  private Player player = null;
  public SoundMIDlet() {
    try {
      InputStream is = getClass().getResourceAsStream("/Autorun.wav");
      player = Manager.createPlayer(is, "audio/x-wav");
    } catch (IOException e) { System.out.println("1:" + e); }
    catch (MediaException e) { System.out.println("2:" + e); }
    catch (Exception e) { System.out.println("3:" + e); }
  }
  public void startApp() {
    if (player != null) {
      try { player.start(); }
      catch (MediaException e) { System.out.println("4:" + e); }
    }
  }
  public void pauseApp() {}
  public void destroyApp(boolean unconditional) {}
}

注意事項

• 文件放置於 JAR 根目錄或對應資源路徑
• 異常處理需區分 IO、媒體、通用異常
• Nokia S60 模擬器測試通過