基于android的远程视频监控系统

基本过程是android作为socket客户端将采集到的每一帧图像数据发送出去，PC作为服务器接收并显示每一帧图像实现远程监控。图片如下（后来PC端加了个拍照功能）。。。

（PS。刚学android和java不久很多东西还不懂，高手若是知道哪些地方可以继续优化的话还请多多指点下啊）

系统代码如下：
一、android手机客户端
（1）AndroidManifest.xml文件。添加camera和socket权限，并设置了程序开始执行的activity、

<?xml version= "1.0" encoding= "utf-8" ?>

            "http://schemas.android.com/apk/res/android"                                                  package            =            "org.wanghai.CameraTest"                                                  android:versionCode=            "1"                                                  android:versionName=            "1.0"             >                                                                                                 "15"             />                                                                                                                                                           "android.permission.CAMERA"             />                                                                  "android.hardware.camera"             />                                                                  "android.hardware.camera.autofocus"             />                                                                  "android.permission.INTERNET"            />                                                              "android.permission.KILL_BACKGROUND_PROCESSES"            />                                                              "android.permission.RESTART_PACKAGES"            />                                                                                                                                           android:icon=            "@drawable/ic_launcher"                                                      android:label=            "@string/app_name"             >                                                                                                                                                                   android:name=            ".GetIP"                                                          android:screenOrientation=            "landscape"                                                          android:label=            "@string/app_name"             >                                                                                                                                    "android.intent.action.MAIN"             />                                                                          "android.intent.category.LAUNCHER"             />                                                                                                                                                                                                                                android:name=            ".CameraTest"                                                          android:screenOrientation=            "landscape"                                                          android:label=            "@string/app_name"             >

　　（2）main.xml 设置surfaceview用于摄像头采集图像的预览

<?xml version= "1.0" encoding= "utf-8" ?>

            "http://schemas.android.com/apk/res/android"                                                  android:layout_width=            "fill_parent"                                                  android:layout_height=            "fill_parent"                                                  android:orientation=            "vertical"             >                                                                                                                                          android:id=            "@+id/sView"                                                      android:layout_width=            "fill_parent"                                                      android:layout_height=            "fill_parent"                                                      android:scaleType=            "fitCenter"            />

　　（3）login.xml 登录界面，用于输入服务器IP

<?xml version= "1.0" encoding= "utf-8" ?>

            "http://schemas.android.com/apk/res/android"                                                      android:id=            "@+id/loginForm"                                                      android:orientation=            "vertical"                                                      android:layout_width=            "fill_parent"                                                      android:layout_height=            "fill_parent"                                                      >                                                                                                                                                                        android:layout_width=            "fill_parent"                                                      android:layout_height=            "wrap_content"                                                      android:text=            "IP:"                                                      android:textSize=            "10pt"                                                      />                                                                                                                      android:id=            "@+id/ipedittext"                                                      android:layout_width=            "fill_parent"                                                      android:layout_height=            "wrap_content"                                                      android:digits=            "0123456789."                                                      android:hint=            "请填写服务器IP"                                                      android:selectAllOnFocus=            "true"                                                      />

　　（4）GetIP.java 获得服务器IP后，通过Intent启动CameraTest的activity，ip信息通过Bundle传递

public class GetIP extends Activity { String ipname = null ; @Override public void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); // 设置全屏 requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.main); final Builder builder = new AlertDialog.Builder( this ); //定义一个AlertDialog.Builder对象 builder.setTitle( "登录服务器对话框" ); // 设置对话框的标题 //装载/res/layout/login.xml界面布局 TableLayout loginForm = (TableLayout)getLayoutInflater().inflate( R.layout.login, null ); final

EditText iptext = (EditText)loginForm.findViewById(R.id.ipedittext);

builder.setView(loginForm); // 设置对话框显示的View对象 // 为对话框设置一个“登录”按钮 builder.setPositiveButton( "登录" // 为按钮设置监听器 , new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //此处可执行登录处理 ipname = iptext.getText().toString().trim(); Bundle data = new Bundle(); data.putString( "ipname" ,ipname); Intent intent = new Intent(GetIP. this ,CameraTest. class ); intent.putExtras(data); startActivity(intent); } }); // 为对话框设置一个“取消”按钮 builder.setNegativeButton( "取消" , new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //取消登录，不做任何事情。 System.exit( 1 ); } }); //创建、并显示对话框 builder.create().show(); } }

　　（5）CameraTest.java 程序主体。设置PreviewCallback后，每当一帧图像数据采集完成后将调用PreviewCallback的onPreviewFrame函数。在这里我们将YUV格式数据转为jpg，再启用线程将数据通过socket发送出去。

public class CameraTest extends Activity { SurfaceView sView; SurfaceHolder surfaceHolder; int screenWidth, screenHeight; Camera camera; // 定义系统所用的照相机 boolean isPreview = false ; //是否在浏览中 private String ipname; @SuppressWarnings ( "deprecation" ) @Override public void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); // 设置全屏 requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.main); // 获取IP地址 Intent intent = getIntent(); Bundle data = intent.getExtras(); ipname = data.getString( "ipname" ); screenWidth = 640 ; screenHeight = 480 ; sView = (SurfaceView) findViewById(R.id.sView); // 获取界面中SurfaceView组件 surfaceHolder = sView.getHolder(); // 获得SurfaceView的SurfaceHolder // 为surfaceHolder添加一个回调监听器 surfaceHolder.addCallback( new Callback() { @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void

surfaceCreated(SurfaceHolder holder) {

initCamera(); // 打开摄像头 } @Override public void surfaceDestroyed(SurfaceHolder holder) { // 如果camera不为null ,释放摄像头 if (camera != null ) { if (isPreview) camera.stopPreview(); camera.release(); camera = null ; } System.exit( 0 ); } }); // 设置该SurfaceView自己不维护缓冲 surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } private void initCamera() { if (!isPreview) { camera = Camera.open(); } if (camera != null && !isPreview) { try { Camera.Parameters parameters = camera.getParameters(); parameters.setPreviewSize(screenWidth, screenHeight); // 设置预览照片的大小 parameters.setPreviewFpsRange( 20 , 30 ); // 每秒显示20~30帧 parameters.setPictureFormat(ImageFormat.NV21); // 设置图片格式 parameters.setPictureSize(screenWidth, screenHeight); // 设置照片的大小 //camera.setParameters(parameters); // android2.3.3以后不需要此行代码 camera.setPreviewDisplay(surfaceHolder); // 通过SurfaceView显示取景画面 camera.setPreviewCallback( new StreamIt(ipname)); // 设置回调的类 camera.startPreview(); // 开始预览 camera.autoFocus( null ); // 自动对焦 } catch (Exception e) { e.printStackTrace(); } isPreview = true ; } } } class StreamIt implements Camera.PreviewCallback { private String ipname; public StreamIt(String ipname){ this .ipname = ipname; } @Override public void onPreviewFrame( byte [] data, Camera camera) { Size size = camera.getParameters().getPreviewSize(); try { //调用image.compressToJpeg（）将YUV格式图像数据data转为jpg格式 YuvImage image = new YuvImage(data, ImageFormat.NV21, size.width, size.height, null ); if (image!= null ){ ByteArrayOutputStream outstream = new ByteArrayOutputStream(); image.compressToJpeg( new Rect( 0 , 0 , size.width, size.height), 80 , outstream); outstream.flush(); //启用线程将图像数据发送出去 Thread th = new MyThread(outstream,ipname); th.start(); } } catch (Exception ex){ Log.e( "Sys" , "Error:" +ex.getMessage()); } } } class MyThread extends Thread{ private byte byteBuffer[] = new byte [ 1024 ]; private OutputStream outsocket; private ByteArrayOutputStream myoutputstream; private String ipname; public MyThread(ByteArrayOutputStream myoutputstream,String ipname){ this .myoutputstream = myoutputstream; this .ipname = ipname; try { myoutputstream.close(); } catch (IOException e) { e.printStackTrace(); } } public void run() { try { //将图像数据通过Socket发送出去 Socket tempSocket = new Socket(ipname, 6000 ); outsocket = tempSocket.getOutputStream(); ByteArrayInputStream inputstream = new ByteArrayInputStream(myoutputstream.toByteArray()); int amount; while ((amount = inputstream.read(byteBuffer)) != - 1 ) { outsocket.write(byteBuffer, 0 , amount); } myoutputstream.flush(); myoutputstream.close(); tempSocket.close(); } catch (IOException e) { e.printStackTrace(); } } }

　　二、PC服务器端
ImageServer.java 用于显示图像，并且可以拍照

public class ImageServer { public static ServerSocket ss = null ; public static void main(String args[]) throws IOException{ ss = new ServerSocket( 6000 ); final ImageFrame frame = new ImageFrame(ss); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible( true ); while ( true ){ frame.panel.getimage(); frame.repaint(); } } } /** A frame with an image panel */ @SuppressWarnings ( "serial" ) class ImageFrame extends JFrame{ public ImagePanel panel; public JButton jb; public ImageFrame(ServerSocket ss){ // get screen dimensions Toolkit kit = Toolkit.getDefaultToolkit(); Dimension screenSize = kit.getScreenSize(); int screenHeight = screenSize.height; int screenWidth = screenSize.width; // center frame in screen setTitle( "ImageTest" ); setLocation((screenWidth - DEFAULT_WIDTH) / 2 , (screenHeight - DEFAULT_HEIGHT) / 2 ); setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT); // add panel to frame this .getContentPane().setLayout( null ); panel = new ImagePanel(ss); panel.setSize( 640 , 480 ); panel.setLocation( 0 , 0 ); add(panel); jb = new JButton( "拍照" ); jb.setBounds( 0 , 480 , 640 , 50 ); add(jb); saveimage saveaction = new saveimage(ss); jb.addActionListener(saveaction); } public static final int DEFAULT_WIDTH = 640 ; public static final int DEFAULT_HEIGHT = 560 ; } /** A panel that displays a tiled image */ @SuppressWarnings ( "serial" ) class ImagePanel extends JPanel { private ServerSocket ss; private Image image; private InputStream ins; public ImagePanel(ServerSocket ss) { this .ss = ss; } public void getimage() throws IOException{ Socket s = this .ss.accept(); System.out.println( "连接成功!" ); this .ins = s.getInputStream(); this .image = ImageIO.read(ins); this .ins.close(); } public void paintComponent(Graphics g){ super .paintComponent(g); if (image == null ) return ; g.drawImage(image, 0 , 0 , null ); } } class saveimage implements ActionListener { RandomAccessFile inFile = null ; byte byteBuffer[] = new byte [ 1024 ]; InputStream ins; private ServerSocket ss; public saveimage(ServerSocket ss){ this .ss = ss; } public void actionPerformed(ActionEvent event){ try { Socket s = ss.accept(); ins = s.getInputStream(); // 文件选择器以当前的目录打开 JFileChooser jfc = new JFileChooser( "." ); jfc.showSaveDialog( new javax.swing.JFrame()); // 获取当前的选择文件引用 File savedFile = jfc.getSelectedFile(); // 已经选择了文件 if (savedFile != null ) { // 读取文件的数据，可以每次以快的方式读取数据 try { inFile = new RandomAccessFile(savedFile, "rw" ); } catch (FileNotFoundException e) { e.printStackTrace(); } } int amount; while ((amount = ins.read(byteBuffer)) != - 1 ) { inFile.write(byteBuffer, 0 , amount); } inFile.close(); ins.close(); s.close(); javax.swing.JOptionPane.showMessageDialog( new javax.swing.JFrame(), "已接保存成功" , "提示!" , javax.swing.JOptionPane.PLAIN_MESSAGE); } catch (IOException e) { e.printStackTrace(); } } }

　　开放源码如下（android我使用的是4.03的SDK，其它版本请自行更改。2.3.3版本以下的请注意initCamera()里被注释掉的哪一行）

只能在android4.04系统的手机上运行成功哦。

下面是测试成功时的启动画面：

源码链接：

http://files.cnblogs.com/feifei1010/%E5%9F%BA%E4%BA%8Eandroid%E6%89%8B%E6%9C%BA%E7%9A%84%E8%BF%9C%E7%A8%8B%E8%A7%86%E9%A2%91%E7%9B%91%E6%8E%A7%E7%B3%BB%E7%BB%9F.rar

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