Android自定义照相机实现

1、最新Android自定义照相机实现Android自定义照相机实现拍照、保存到SD卡，利用Bundle在Acitivity交换数据 分类： 【Android多媒体开发系列】 【Android开发学习之路】 2022-05-14 21:36 12172人阅读 HYPERLINK :/ l comments 评论(14) 收藏 HYPERLINK :/ l report o 举报 举报 ANDROIDAndroid自定义照相机实现近期小巫在学校有一个创新工程，也不是最近，是一个拖了很久的工程，之前一直没有去搞，最近因为要中期检查，搞得我跟小组成员一阵忙活，其实开发一款照相机软件并不太难，下面就是通过

2、自定义的方式来实现 照相的功能。创立一个工程：FingerTakePicture首先来搞一下界面：html view plaincopyprint? 界面效果无法把预览给截屏下来滴： 权限设置少不了：html view plaincopyprint? 主Activity: java view plaincopyprint? package;import;import;import;import;import;import;import;import;import;import;import;import;import;import;import;import;import;import;imp

3、ort;import;import;/*Android手指拍照*authorwwj*date2022/4/29*/publicclassMainActivityextendsActivityprivateViewlayout;privateCameracamera;privateCamera.Parametersparameters=null;Bundlebundle=null;/声明一个Bundle对象，用来存储数据OverridepublicvoidonCreate(BundlesavedInstanceState)super.onCreate(savedInstanceState);/显

4、示界面setContentView();layout=this.findViewById();SurfaceViewsurfaceView=(SurfaceView)this.findViewById();surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);surfaceView.getHolder().setFixedSize(176,144);/设置Surface分辨率surfaceView.getHolder().setKeepScreenOn(true);/屏幕常亮surfaceView.ge

5、tHolder().addCallback(newSurfaceCallback();/为SurfaceView的句柄添加一个回调函数/*按钮被点击触发的事件*paramv*/publicvoidbtnOnclick(Viewv)if(camera!=null)switch(v.getId()case:/拍照camera.takePicture(null,null,newMyPictureCallback();break;/*图片被点击触发的时间*paramv*/publicvoidimageClick(Viewv)if(v.getId()=)if(bundle=null)Toast.make

6、Text(getApplicationContext(),R.string.takephoto,Toast.LENGTH_SHORT).show();elseIntentintent=newIntent(this,ShowPicActivity.class);intent.putExtras(bundle);startActivity(intent);privatefinalclassMyPictureCallbackimplementsPictureCallbackOverridepublicvoidonPictureTaken(bytedata,Cameracamera)trybundle

7、=newBundle();bundle.putByteArray(bytes,data);/将图片字节数据保存在bundle当中，实现数据交换saveToSDCard(data);/保存图片到sd卡中Toast.makeText(getApplicationContext(),R.string.success,Toast.LENGTH_SHORT).show();camera.startPreview();/拍完照后，重新开始预览catch(Exceptione)e.printStackTrace();/*将拍下来的照片存放在SD卡中*paramdata*throwsIOException*/

8、publicstaticvoidsaveToSDCard(bytedata)throwsIOExceptionDatedate=newDate();SimpleDateFormatformat=newSimpleDateFormat(yyyyMMddHHmmss);/格式化时间Stringfilename=format.format(date)+.jpg;FilefileFolder=newFile(Environment.getExternalStorageDirectory()+/finger/);if(!fileFolder.exists()/如果目录不存在，那么创立一个名为finger

9、的目录fileFolder.mkdir();FilejpgFile=newFile(fileFolder,filename);FileOutputStreamoutputStream=newFileOutputStream(jpgFile);/文件输出流outputStream.write(data);/写入sd卡中outputStream.close();/关闭输出流privatefinalclassSurfaceCallbackimplementsCallback/拍照状态变化时调用该方法OverridepublicvoidsurfaceChanged(SurfaceHolderholde

10、r,intformat,intwidth,intheight)parameters=camera.getParameters();/获取各项参数parameters.setPictureFormat(PixelFormat.JPEG);/设置图片格式parameters.setPreviewSize(width,height);/设置预览大小parameters.setPreviewFrameRate(5);/设置每秒显示4帧parameters.setPictureSize(width,height);/设置保存的图片尺寸parameters.setJpegQuality(80);/设置照片

11、质量/开始拍照时调用该方法OverridepublicvoidsurfaceCreated(SurfaceHolderholder)trycamera=Camera.open();/翻开摄像头camera.setPreviewDisplay(holder);/设置用于显示拍照影像的SurfaceHolder对象camera.setDisplayOrientation(getPreviewDegree(MainActivity.this);camera.startPreview();/开始预览catch(Exceptione)e.printStackTrace();/停止拍照时调用该方法Over

12、ridepublicvoidsurfaceDestroyed(SurfaceHolderholder)if(camera!=null)camera.release();/释放照相机camera=null;/*点击 屏幕是，显示两个按钮*/OverridepublicbooleanonTouchEvent(MotionEventevent)switch(event.getAction()caseMotionEvent.ACTION_DOWN:layout.setVisibility(ViewGroup.VISIBLE);/设置视图可见break;returntrue;Overridepublic

13、booleanonKeyDown(intkeyCode,KeyEventevent)switch(keyCode)caseKeyEvent.KEYCODE_CAMERA:/按下拍照按钮if(camera!=null&event.getRepeatCount()=0)/拍照/注：调用takePicture()方法进行拍照是传入了一个PictureCallback对象当程序获取了拍照所得的图片数据之后/，PictureCallback对象将会被回调，该对象可以负责对相片进行保存或传入网络camera.takePicture(null,null,newMyPictureCallback();retu

14、rnsuper.onKeyDown(keyCode,event);/提供一个静态方法，用于根据 方向获得相机预览画面旋转的角度publicstaticintgetPreviewDegree(Activityactivity)/获得 的方向introtation=activity.getWindowManager().getDefaultDisplay().getRotation();intdegree=0;/根据 的方向计算相机预览画面应该选择的角度switch(rotation)caseSurface.ROTATION_0:degree=90;break;caseSurface.ROTATI

15、ON_90:degree=0;break;caseSurface.ROTATION_180:degree=270;break;caseSurface.ROTATION_270:degree=180;break;returndegree;package com.wwj.finger;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.Date;import android.app.Activ

16、ity;import android.content.Intent;import android.graphics.PixelFormat;import android.hardware.Camera;import android.hardware.Camera.PictureCallback;import android.os.Bundle;import android.os.Environment;import android.view.KeyEvent;import android.view.MotionEvent;import android.view.Surface;import a

17、ndroid.view.SurfaceHolder;import android.view.SurfaceHolder.Callback;import android.view.SurfaceView;import android.view.View;import android.view.ViewGroup;import android.widget.Toast;/* * Android手指拍照 * * author wwj * date 2022/4/29 */public class MainActivity extends Activity private View layout;pr

18、ivate Camera camera;private Camera.Parameters parameters = null;Bundle bundle = null; / 声明一个Bundle对象，用来存储数据Overridepublic void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState);/ 显示界面setContentView(R.layout.activity_main);layout = this.findViewById(R.id.buttonLayout);SurfaceView

19、 surfaceView = (SurfaceView) this.findViewById(R.id.surfaceView);surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);surfaceView.getHolder().setFixedSize(176, 144);/设置Surface分辨率surfaceView.getHolder().setKeepScreenOn(true);/ 屏幕常亮surfaceView.getHolder().addCallback(new SurfaceCal

20、lback();/为SurfaceView的句柄添加一个回调函数/* * 按钮被点击触发的事件 * * param v */public void btnOnclick(View v) if (camera != null) switch (v.getId() case R.id.takepicture:/ 拍照camera.takePicture(null, null, new MyPictureCallback();break;/* * 图片被点击触发的时间 * * param v */public void imageClick(View v) if (v.getId() = R.id.

21、scalePic) if (bundle = null) Toast.makeText(getApplicationContext(), R.string.takephoto,Toast.LENGTH_SHORT).show(); else Intent intent = new Intent(this, ShowPicActivity.class);intent.putExtras(bundle);startActivity(intent);private final class MyPictureCallback implements PictureCallback Overridepub

22、lic void onPictureTaken(byte data, Camera camera) try bundle = new Bundle();bundle.putByteArray(bytes, data);/将图片字节数据保存在bundle当中，实现数据交换saveToSDCard(data); / 保存图片到sd卡中Toast.makeText(getApplicationContext(), R.string.success,Toast.LENGTH_SHORT).show();camera.startPreview(); / 拍完照后，重新开始预览 catch (Except

23、ion e) e.printStackTrace();/* * 将拍下来的照片存放在SD卡中 * param data * throws IOException */public static void saveToSDCard(byte data) throws IOException Date date = new Date();SimpleDateFormat format = new SimpleDateFormat(yyyyMMddHHmmss); / 格式化时间String filename = format.format(date) + .jpg;File fileFolder

24、= new File(Environment.getExternalStorageDirectory()+ /finger/);if (!fileFolder.exists() / 如果目录不存在，那么创立一个名为finger的目录fileFolder.mkdir();File jpgFile = new File(fileFolder, filename);FileOutputStream outputStream = new FileOutputStream(jpgFile); / 文件输出流outputStream.write(data); / 写入sd卡中outputStream.cl

25、ose(); / 关闭输出流private final class SurfaceCallback implements Callback / 拍照状态变化时调用该方法Overridepublic void surfaceChanged(SurfaceHolder holder, int format, int width,int height) parameters = camera.getParameters(); / 获取各项参数parameters.setPictureFormat(PixelFormat.JPEG); / 设置图片格式parameters.setPreviewSize

26、(width, height); / 设置预览大小parameters.setPreviewFrameRate(5);/设置每秒显示4帧parameters.setPictureSize(width, height); / 设置保存的图片尺寸parameters.setJpegQuality(80); / 设置照片质量/ 开始拍照时调用该方法Overridepublic void surfaceCreated(SurfaceHolder holder) try camera = Camera.open(); / 翻开摄像头camera.setPreviewDisplay(holder); /

27、设置用于显示拍照影像的SurfaceHolder对象camera.setDisplayOrientation(getPreviewDegree(MainActivity.this);camera.startPreview(); / 开始预览 catch (Exception e) e.printStackTrace();/ 停止拍照时调用该方法Overridepublic void surfaceDestroyed(SurfaceHolder holder) if (camera != null) camera.release(); / 释放照相机camera = null;/* * 点击 屏

28、幕是，显示两个按钮 */Overridepublic boolean onTouchEvent(MotionEvent event) switch (event.getAction() case MotionEvent.ACTION_DOWN:layout.setVisibility(ViewGroup.VISIBLE); / 设置视图可见break;return true;Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) switch (keyCode) case KeyEvent.KEYCODE_CAMERA: /

29、按下拍照按钮if (camera != null & event.getRepeatCount() = 0) / 拍照/注：调用takePicture()方法进行拍照是传入了一个PictureCallback对象当程序获取了拍照所得的图片数据之后/，PictureCallback对象将会被回调，该对象可以负责对相片进行保存或传入网络camera.takePicture(null, null, new MyPictureCallback();return super.onKeyDown(keyCode, event);/ 提供一个静态方法，用于根据 方向获得相机预览画面旋转的角度public s

30、tatic int getPreviewDegree(Activity activity) / 获得 的方向int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();int degree = 0;/ 根据 的方向计算相机预览画面应该选择的角度switch (rotation) case Surface.ROTATION_0:degree = 90;break;case Surface.ROTATION_90:degree = 0;break;case Surface.ROTATION_180:deg

31、ree = 270;break;case Surface.ROTATION_270:degree = 180;break;return degree;用来显示图片的Activity:java view plaincopyprint? package;import;import;import;import;import;import;import;publicclassShowPicActivityextendsActivityprivateImageViewivPic=null;/显示图片控件/*Activity在创立的时候回调的函数主要用来初始化一些变量*/Overrideprotected

32、voidonCreate(BundlesavedInstanceState)super.onCreate(savedInstanceState);setContentView();ivPic=(ImageView)findViewById();setImageBitmap(getImageFormBundle();/*将MainActivity传过来的图片显示在界面当中*parambytes*/publicvoidsetImageBitmap(bytebytes)BitmapcameraBitmap=byte2Bitmap();/根据拍摄的方向旋转图像纵向拍摄时要需要将图像选择90度)Matr

33、ixmatrix=newMatrix();matrix.setRotate(MainActivity.getPreviewDegree(this);cameraBitmap=Bitmap.createBitmap(cameraBitmap,0,0,cameraBitmap.getWidth(),cameraBitmap.getHeight(),matrix,true);ivPic.setImageBitmap(cameraBitmap);/*从Bundle对象中获取数据*return*/publicbytegetImageFormBundle()Intentintent=getIntent()

34、;Bundledata=intent.getExtras();bytebytes=data.getByteArray(bytes);returnbytes;/*将字节数组的图形数据转换为Bitmap*return*/privateBitmapbyte2Bitmap()bytedata=getImageFormBundle();/将byte数组转换成Bitmap对象Bitmapbitmap=BitmapFactory.decodeByteArray(data,0,data.length);returnbitmap;package com.wwj.finger;import android.app.Activity;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Matrix;import android.os.Bundle;import android.widget.ImageView;public class ShowPicActivity extends Ac