我想让我的j2me项目能够使用MMAPI(JSR135)进行拍照
所以我用以下代码检查我的HTC Diamond
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.midlet.MIDlet;
public class jsrtest extends MIDlet implements Runnable,CommandListener{
Form form;
Thread thread;
Command c=new Command("Exit",Command.EXIT,0);
public jsrtest()
{
Display.getDisplay(this).setCurrent(form=new Form("JSR Test"));
form.addCommand(c);
form.setCommandListener(this);
(thread=new Thread(this)).start();
}
protected void destroyApp(boolean u){
super.notifyDestroyed();
}
protected void pauseApp() {
}
protected void startApp(){
}
public void run() {
checkJSR("MIDP2.0","javax.microedition.lcdui.game.GameCanvas");
checkJSR("CLDC1.1","java.lang.Float");
checkJSR("MMAPI","javax.microedition.media.Player");
checkJSR("WMAPI","javax.wireless.messaging.Message");
checkJSR("JSR75","javax.microedition.io.file.FileConnection");
checkJSR("JSR082","javax.bluetooth.UUID");
checkJSR("JSR135","javax.microedition.media.Control");
checkJSR("JSR135_videocontrol","javax.microedition.media.control.VideoControl");
checkJSR("JSR179","javax.microedition.location.Location");
checkJSR("JSR180","javax.microedition.sip.SipConnection");
checkJSR("JSR184","javax.microedition.m3g.Mesh");
checkJSR("JSR211","javax.microedition.content.Registry");
checkJSR("JSR226","javax.microedition.m2g.SVGImage");
checkJSR("JSR229","javax.microedition.payment.TransactionRecord");
checkJSR("JSR234","javax.microedition.amms.Module");
checkJSR("JSR238","javax.microedition.global.Formatter");
checkJSR("JSR239","javax.microedition.khronos.egl.EGL");
}
private void checkJSR(String jsr,String className)
{
try {
Class.forName(className);
form.append(jsr+" Supproted\n");
} catch (ClassNotFoundException e) {
form.append(jsr+" Not Supproted\n");
}
}
public void commandAction(Command cmd, Displayable disp) {
this.destroyApp(false);
}
}
这表明HTC Diamond支持MMAPI。
因此,我在HTC Diamond上测试了以下代码,以查看相机是否正常运行但失败:
private void test(){
Player p;
VideoControl vc;
try{
p = Manager.createPlayer("capture://video");
p.realize();
vc = (VideoControl) p.getControl("VideoControl");
form.append(new StringItem("mmmmmmmm",""));
if (vc != null) {
form.append((Item)vc.initDisplayMode(VideoControl.USE_GUI_PRIMITIVE, null));
}
p.start();
}catch(Exception e){
e.printStackTrace();
}
}
在上面的代码上,可以在JAVA ME Platform SDK 3上正常工作。
谁能告诉我MMAPI为什么不能在我的手机上运行?
最佳答案
您可以进行其他测试以查看是否支持视频捕获:
if(System.getProperty("supports.video.capture") == null){
//Video capture not supported
}
但我认为主要问题在于此:
form.append((Item)vc.initDisplayMode(VideoControl.USE_GUI_PRIMITIVE, null));
尝试这个:
vc.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, <a Canvas here>);
vc.setDisplayFullScreen(true);
vc.setVisible(true);