我想在我的应用中记录amd保存视频，论坛上没有很多关于此的信息。
我不想像“Invoke.invokeApplication（Invoke.APP_TYPE_CAMERA，new CameraArguments（））”那样调用相机;“
以下代码段给我一个空白屏幕http://docs.blackberry.com/en/developers/deliverables/17968/Record_video_to_a_file_in_a_BB_device_app_1222784_11.jsp
我已经开始，停止并保存视频，当我尝试播放视频时显示“格式不支持”，有没有办法获得所有支持的格式，并且是否有所有视频的列表格式？ 我的代码：
public class MyScreen extends MainScreen{
String PATH;
RecordControl _recordControl;
Player _player;
MenuItem RecordVideo;
MenuItem StopVideo;
MenuItem SaveVideo;
public MyScreen() {
try {
_player = javax.microedition.media.Manager.createPlayer("capture://video?encoding=video/3gpp");
_player.realize();
VideoControl videoControl = (VideoControl) _player.getControl("VideoControl");
_recordControl = (RecordControl) _player.getControl( "RecordControl" );
Field videoField = (Field) videoControl.initDisplayMode(VideoControl.USE_GUI_PRIMITIVE, "net.rim.device.api.ui.Field");
try{
videoControl.setDisplaySize( Display.getWidth(), Display.getHeight() );
}catch( MediaException me ){
Dialog.alert("Display size not supported");
}
add(videoField);
_recordControl.setRecordLocation("file:///store/home/user/videos/VideoRecordingTest.3gpp" );
_player.start();
_recordControl.startRecord();
}catch( IOException e ){
Dialog.alert(e.toString());
} catch( MediaException e ){
Dialog.alert(e.toString());
}
RecordVideo = new MenuItem("Start Recording", 0, 0){
public void run() {
try {
_player.start();
_recordControl.startRecord();
} catch (MediaException e) {
Dialog.alert("Error Starting recording");
e.printStackTrace();
}
}
};
StopVideo = new MenuItem("Stop Recording", 0, 0){
public void run() {
try {
_player.stop();
} catch (MediaException e) {
Dialog.alert("Error Stopping recording");
e.printStackTrace();
}
}
};
SaveVideo = new MenuItem("Save Video", 0, 0){
public void run() {
try {
// Create an invocation instance with the specified URL where the file type is one of the media types supported by the media player.
Invocation invocation = new Invocation("file:///SDCard/BlackBerry/music/001.mp3");
// Get the Registry object using the class name of the application
Registry _registry=Registry.getRegistry(Application.getApplication().getClass().getName());
//Invoke the content handler.
_registry.invoke(invocation);
} catch (IOException e)
{ }
}
};
}
public void stop() {
if (_player != null){
_player.close();
_player = null;
}
if (_recordControl != null){
_recordControl.stopRecord();
try {
_recordControl.commit();
}
catch (Exception e)
{
Dialog.alert(e.toString());
}
_recordControl = null;
}
}
protected void makeMenu(Menu menu, int instance) {
ContextMenu contextMenu = ContextMenu.getInstance();
contextMenu.setTarget(this);
contextMenu.clear();
this.makeContextMenu(contextMenu);
menu.deleteAll();
menu.add(contextMenu);
}
public void makeContextMenu(ContextMenu contextMenu) {
contextMenu.addItem(MenuItem.separator(32));
contextMenu.addItem(RecordVideo);
contextMenu.addItem(StopVideo);
contextMenu.addItem(SaveVideo);
}
}
答案 0 :(得分：0)
完整代码用于录制，停止和保存视频以及退出视频：
助手：
public static boolean SdcardAvailabulity() {
String root = null;
Enumeration e = FileSystemRegistry.listRoots();
while (e.hasMoreElements()) {
root = (String) e.nextElement();
if( root.equalsIgnoreCase("sdcard/") ) {
return true;
}else if( root.equalsIgnoreCase("store/") ) {
return false;
}
}
class MySDListener implements FileSystemListener {
public void rootChanged(int state, String rootName) {
if( state == ROOT_ADDED ) {
if( rootName.equalsIgnoreCase("sdcard/") ) {
}
} else if( state == ROOT_REMOVED ) {
}
}
}
return true;
}
主类
String _encoding = "encoding=video/3gpp&mode=standard";
private static Player _player;
private static VideoControl _vc;
private RecordControl _rc;
private static boolean _locationSet = false;
private static OutputStream _out;
private static FileConnection _fc;
String PATH;
String STREAM_VIDEO_FILE;
String StringVideofileName;
/*LabelField GetVideofileName = new LabelField("",LabelField.FOCUSABLE){
protected boolean navigationClick(int status, int time){
Dialog.alert("Clicked");
return true;
}
};*/
protected boolean keyChar( char c, int status, int time ){
switch( c ) {
case 's':
startRecord();
return true;
case 'x':
stopRecord();
return true;
case 'c':
commit();
return true;
default:
return false;
}
}
private void startRecord(){
try {
if( !_locationSet ){
try {
System.out.println("STREAM_VIDEO_FILE-------------"+STREAM_VIDEO_FILE);
_fc = (FileConnection)Connector.open( STREAM_VIDEO_FILE );
if( !_fc.exists() ){
_fc.create();
}
_fc.truncate( 0 );
_out = _fc.openOutputStream();
} catch ( Exception e ) {
return;
}
_rc.setRecordStream( _out );
_locationSet = true;
}
_rc.startRecord();
} catch ( Exception e ) {
}
}
private void stopRecord(){
try {
_rc.stopRecord();
} catch ( Exception e ) {
}
}
private void commit() {
try {
_rc.commit();
Dialog.alert( "Saved" );
_locationSet = false;
try {
_out.close();
_fc.close();
StringVideofileName =_fc.getName();
DefaultScreen.LF.setText(StringVideofileName);
if(_player!=null)
_player.close();
}catch(Exception e){
if(_player!=null){
_player.close();
}
if(_fc!=null){
try{
_fc.close();
}catch (IOException e1){
}
}
}
} catch ( Exception e ) {
}
}
public MyScreen(){
if(Sh.SdcardAvailabulity()){
PATH = System.getProperty("fileconn.dir.memorycard.photos")+"Video_"+System.currentTimeMillis()+".mp4";//here "str" having the current Date and Time;
} else {
PATH = System.getProperty("fileconn.dir.photos")+"Video_"+System.currentTimeMillis()+".mp4";
}
STREAM_VIDEO_FILE = PATH;
try {
_player = javax.microedition.media.Manager.createPlayer( "capture://video?" + _encoding );
_player.start();
_vc = (VideoControl)_player.getControl( "VideoControl" );
_rc = (RecordControl)_player.getControl( "RecordControl" );
final Field videoField = (Field)_vc.initDisplayMode( VideoControl.USE_GUI_PRIMITIVE, "net.rim.device.api.ui.Field" );
_vc.setDisplaySize( Display.getWidth(), Display.getHeight() );
add( videoField );
} catch ( final Exception e ) {
System.out.println( "Exception in VideoScreen constructor" );
}
addMenuItem( new MenuItem( "Start Video Recording", 0, 0 ){
public void run(){
startRecord();
}
});
addMenuItem( new MenuItem( "Stop Video Recdording", 0, 0 ){
public void run(){
stopRecord();
}
});
addMenuItem( new MenuItem( "Save Video Recording", 0, 0 ){
public void run(){
commit();
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
UiApplication.getUiApplication().popScreen(MyScreen.this);
}
});
}
});
}
}