基于android的远程视频监控系统-阿里云开发者社区

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基于android的远程视频监控系统

简介:

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)。。。

捕获.JPG 
(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)
此贴是这个系统的介绍,没有基础的朋友可以参考下面教程(会陆续补充完整,让大家都学会如何实现整个功能):
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

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="org.wanghai.CameraTest"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="15" />
    
    <!-- 授予程序使用摄像头的权限 -->
        <uses-permission android:name="android.permission.CAMERA" /> 
        <uses-feature android:name="android.hardware.camera" /> 
        <uses-feature android:name="android.hardware.camera.autofocus" />
        <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES"/>
    <uses-permission android:name="android.permission.RESTART_PACKAGES"/>

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
                
        <activity
            android:name=".GetIP"
            android:screenOrientation="landscape"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".CameraTest"
            android:screenOrientation="landscape"
            android:label="@string/app_name" >

        </activity>
        
    </application>

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

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

   <SurfaceView
        android:id="@+id/sView"
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent"
        android:scaleType="fitCenter"/>

</LinearLayout>
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(3)login.xml 登录界面,用于输入服务器IP

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<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/loginForm"
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        >

<TableRow>            
<TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="IP:"
        android:textSize="10pt"
        />
<!-- 输入用户名的文本框 -->
<EditText
    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"
        />
</TableRow>

</TableLayout>
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(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

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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();
        }
}
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(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。

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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();
        }
    }

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

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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();
                }
        }
}
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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)

本文转自qianqianlianmeng博客园博客,原文链接:http://www.cnblogs.com/aimeng/archive/2012/08/17/2644278.html,如需转载请自行联系原作者

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