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"?><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> |
（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"?><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> |
（3）login.xml 登录界面，用于输入服务器IP
<?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> |
（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：
原文地址：http://blog.csdn.net/u014723529/article/details/41721279
