把Android手机变成远程监控摄像头

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、

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 <? 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" /> < 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" /> < 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 >

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 （ 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()); } }

更多相关文章

随机推荐