Taking Picture with an MMAPI from Phone Camera in J2ME

[austin007]

Nowadays, we should espicially talk about JSR234 (Advanced Multimedia API). Because it allows to you more controls on device’s camera, radio,etc. But currently there are a few phones those are integrated JSR234. (For e.g. Sony Ericsson K800i) But there is no Nokia phones.

First of all, we have to be sure that our device supports camera encodings.
For check this use below code.


private String[] capabilitiesIdx = {
“supports.audio.capture”,
“supports.video.capture”,
“supports.recording”,
“audio.encodings”,
“video.encodings”,
“video.snapshot.encodings”, // “streamable.contents”
};
StringItem[] str = new StringItem[capabilitiesIdx.length];
for (int i = 0; i < capabilitiesIdx.length; ++i) {
str[i] = new StringItem(System.getProperty(capabilitiesIdx[i]), “-” + capabilitiesIdx[i]);
}

if your phone supports video capture now you can control your camera.

Initiliaze Camera
try {
//creates a new player and set it to realize
player = Manager.createPlayer("capture://video");
player.realize();
//Grap the Video control and set it to the current display
videoControl = (VideoControl) (player.getControl("VideoControl"));
if (videoControl != null) {
append((Item) (videoControl.initDisplayMode(
VideoControl.USE_GUI_PRIMITIVE, null)));
captureCommand = new Command("Çek", Command.SCREEN, 1);
addCommand(captureCommand);
} else {
messageItem.setText("No video control");
}
} catch (IOException ioe) {
messageItem.setText("IOException: " + ioe.getMessage());
} catch (MediaException me) {
messageItem.setText("Media Exception: " + me.getMessage());
} catch (SecurityException se) {
messageItem.setText("Security Exception: " + se.getMessage());
}

Start Camera

try {
if (player != null) {
player.start();
}
if (videoControl != null) {
videoControl.setVisible(true);
}
} catch (MediaException me) {
messageItem.setText("Media Exception: " + me.getMessage());
} catch (SecurityException se) {
messageItem.setText("Security Exception: " + se.getMessage());
}
active = true;

Get SnapShot
try {
image = videoControl.getSnapshot("encoding=jpeg&width=640&height=480");
} catch (MediaException me) { //yüksek çözünürlük destekle
check = false;
}
if(!check){//hata varsa
image = videoControl.getSnapshot("encoding=png");
}

Stop Camera
try {
if (videoControl != null) {
videoControl.setVisible(false);
}
if (player != null) {
player.stop();
player.close();
}
} catch (MediaException me) {
messageItem.setText("Media Exception: " + me.getMessage());
}

[ltomuta]

Nowadays, we should espicially talk about JSR234 (Advanced Multimedia API). Because it allows to you more controls on device’s camera, radio,etc. But currently there are a few phones those are integrated JSR234. (For e.g. Sony Ericsson K800i) But there is no Nokia phones.

According to http://library.forum.nokia.com/topic...4FB5D741B.html the JSR and its camera capabilities are supported by Series 40 6th Edition devices.

First of all, we have to be sure that our device supports camera encodings.
For check this use below code.

private String[] capabilitiesIdx = {
“supports.audio.capture”,
“supports.video.capture”,
“supports.recording”,
“audio.encodings”,
“video.encodings”,
“video.snapshot.encodings”, //  “streamable.contents”
};
StringItem[] str = new StringItem[capabilitiesIdx.length];
for (int i = 0; i < capabilitiesIdx.length; ++i) {
str[i] = new StringItem(System.getProperty(capabilitiesIdx[i]), “-” + capabilitiesIdx[i]);
}

if your phone supports video capture now you can control your camera.

Initiliaze Camera

try {
//creates a new player and set it to realize
player = Manager.createPlayer("capture://video");
player.realize();
//Grap the Video control and set it to the current display
videoControl = (VideoControl) (player.getControl("VideoControl"));
if (videoControl != null) {
append((Item) (videoControl.initDisplayMode(
VideoControl.USE_GUI_PRIMITIVE, null)));
captureCommand = new Command("Çek", Command.SCREEN, 1);
addCommand(captureCommand);
} else {
messageItem.setText("No video control");
}
} catch (IOException ioe) {
messageItem.setText("IOException: " + ioe.getMessage());
} catch (MediaException me) {
messageItem.setText("Media Exception: " + me.getMessage());
} catch (SecurityException se) {
messageItem.setText("Security Exception: " + se.getMessage());
}

Start Camera

try {
if (player != null) {
player.start();
}
if (videoControl != null) {
videoControl.setVisible(true);
}
} catch (MediaException me) {
messageItem.setText("Media Exception: " + me.getMessage());
} catch (SecurityException se) {
messageItem.setText("Security Exception: " + se.getMessage());
}
active = true;

Get SnapShot

try {
image = videoControl.getSnapshot("encoding=jpeg&width=640&height=480");
} catch (MediaException me) { //yüksek çözünürlük destekle
check = false;
}
if(!check){//hata varsa
image = videoControl.getSnapshot("encoding=png");
}

Stop Camera

try {
if (videoControl != null) {
videoControl.setVisible(false);
}
if (player != null) {
player.stop();
player.close();
}
} catch (MediaException me) {
messageItem.setText("Media Exception: " + me.getMessage());
}

This looks like a nice tutorial, but its place is in the Wiki. Maybe expanding the How to take snapshot using JSR234 article.

[vaisakh31]

hi,
i have a problem when i'm trying to take photos continuously, the code is same and Err shows 'Out of Memory Error java/lang/OutOfMemoryError nativeDecodeImage'.

if you have any suggestions plz replay....

tanks,

[r2j7]

Hello vaisakh31,

and welcome to Nokia Developer Discussion Boards!

Couple of startup questions:

-which device do you use for testing?

-could you provide your source code for review?

Regards,
r2j7