Android Development photo function implementation (with source)

Hello everyone, this is a simple photo function, very simple interface, a display image area Surfaceview A "Take a picture" button. Directly on the code! 1, Camerademoactivity.java (main interface) PackageOrg.winplus.camera; ImportJava.io.File; ImportJava.io.FileOutputStream; Importjava.io.IOException; Importjava.util.Date; Importandroid.app.Activity; ImportAndroid.content.pm.ActivityInfo; ImportAndroid.graphics.PixelFormat; ImportAndroid.hardware.Camera; ImportAndroid.os.AsyncTask; ImportAndroid.os.Bundle; Importandroid.os.Environment; ImportAndroid.text.format.DateFormat; ImportAndroid.util.Log; Importandroid.view.KeyEvent; ImportAndroid.view.SurfaceHolder; ImportAndroid.view.SurfaceView; ImportAndroid.view.View; ImportAndroid.view.Window; ImportAndroid.view.View.OnClickListener; ImportAndroid.widget.Button;  Public classCamerademoactivityextendsactivity{Private Final StaticString TAG = "Cameraactivity"; PrivateSurfaceview Surfaceview; PrivateSurfaceholder Surfaceholder; Privatecamera camera; PrivateFile picture; PrivateButton btnsave; @Override Public voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);          Setrequestedorientation (activityinfo.screen_orientation_portrait);  This. Requestwindowfeature (Window.feature_no_title);          Setcontentview (R.layout.main);      Setupviews (); }            Private voidsetupviews () {Surfaceview= (Surfaceview) Findviewbyid (R.id.camera_preview);//Camera interface to instantiate componentsSurfaceholder = Surfaceview.getholder ();//Camera interface to instantiate componentsSurfaceholder.addcallback (Surfacecallback);//Add A callback for the SurfaceholderSurfaceholder.settype (surfaceholder.surface_type_push_buffers); Btnsave=(Button) Findviewbyid (r.id.save_pic); Btnsave.setonclicklistener (NewOnclicklistener () {@Override Public voidOnClick (View v) {takepic ();      }          }); } @Override Public BooleanOnKeyDown (intKeyCode, KeyEvent event) {          if(KeyCode = =Keyevent.keycode_camera|| KeyCode = =Keyevent.keycode_search)              {takepic (); return true; }          return Super. OnKeyDown (KeyCode, event); }        Private voidTakepic () {Camera.stoppreview ();//Stop the previewCamera.takepicture (NULL,NULL, Picturecallback);// Picture    }        //Photo Call backCamera.picturecallback Picturecallback =NewCamera.picturecallback () {//@Override         Public voidOnpicturetaken (byte[] data, camera camera) {              Newsavepicturetask (). Execute (data);          Camera.startpreview ();        }      }; //Save pic    classSavepicturetaskextendsasynctask<byte[], String, string>{@OverrideprotectedString Doinbackground (byte[] ... params) {String fname= Dateformat.format ("Yyyymmddhhmmss",NewDate ()). ToString () + ". jpg"; LOG.I (TAG,"Fname=" +fname+ ";d ir=" +environment.getexternalstoragedirectory ()); //Picture = new File (Environment.getexternalstoragedirectory (), fname);//Create File Picture=NewFile (Environment.getexternalstoragedirectory () + "/" +fname); Try{FileOutputStream fos=NewFileOutputStream (Picture.getpath ());//Get file output streamFos.write (Params[0]);//written to the fileFos.close (); } Catch(Exception e) {e.printstacktrace (); }              return NULL; }      }        //Surfacehodler Callback handle to open the camera, off camera and photo size changesSurfaceholder.callback Surfacecallback =NewSurfaceholder.callback () { Public voidsurfacecreated (Surfaceholder holder) {log.i (TAG,"surfacecallback===="); Camera= Camera.open ();//Turn on the camera            Try{camera.setpreviewdisplay (holder);//Set Preview}Catch(IOException e) {camera.release ();//Release CameraCamera =NULL; }          }             Public voidSurfacechanged (Surfaceholder holder,intFormatintwidth,intheight) {log.i (TAG,"====surfacechanged"); Camera.parameters Parameters= Camera.getparameters ();//Camera parameters to obtainParameters.setpictureformat (Pixelformat.jpeg);//Setting picture Format//Parameters.set ("rotation");//arbitrary rotationCamera.setdisplayorientation (0); //parameters.setpreviewsize (+);//Set Photo SizeCamera.setparameters (parameters);//Setting Camera ParametersCamera.startpreview ();//Start Preview        }             Public voidsurfacedestroyed (Surfaceholder holder) {log.i (TAG,"====surfacedestroyed"); Camera.stoppreview ();//Stop PreviewCamera.release ();//Release Camera ResourcesCamera =NULL;  }      }; }  2, Main.xml (layout file)<?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" > <Android.view.SurfaceView Android:id= "@+id/camera_preview"Android:layout_width= "800dip"Android:layout_height= "600dip"Android:layout_alignparenttop= "true"android:layout_centerinparent= "true"android:layout_gravity= "Center_vertical|center_horizontal"/> <Button Android:id= "@+id/save_pic"Android:layout_width= "Fill_parent"Android:layout_height= "Wrap_content"Android:text= "@string/txt_save"/> </LinearLayout> 3, don't forget to add permissions:<uses-permission android:name= "Android.permission.CAMERA"/> <uses-feature android:name= " Android.hardware.camera "/> <uses-feature android:name=" Android.hardware.camera.autofocus "android:required= "False"/>Source Download=="original article, reproduced please specify the Source: http://WWW.BLOG.CSDN.NET/TANGCHENG_OK

Android Development photo function implementation (with source)