1.在androidmanifest.xml配置
<!--获取手机的相机--> <uses-permission android:name="android.permission.CAMERA" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>在xml中通过SurfaceView来显示
<SurfaceView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/sv_main_surface" />java代码的照相机实现过程，通过 Camera的一些参数，将取到的数值放画面展示到SurfaceView
sv_main_surface = (SurfaceView) findViewById(R.id.sv_main_surface); sv_main_surface.getHolder().addCallback(new SurfaceHolder.Callback() { @Override public void surfaceCreated(SurfaceHolder holder) { //打开照相机 camera = Camera.open(); //设置参数 Camera.Parameters parameters=camera.getParameters(); parameters.setPictureFormat(PixelFormat.JPEG); parameters.set("jpeg-quality",85); camera.setParameters(parameters); //将画面展示到SurfaceView try { camera.setPReviewDisplay(sv_main_surface.getHolder()); //开启预览 camera.startPreview(); } catch (IOException e) { e.printStackTrace(); } } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceDestroyed(SurfaceHolder holder) { //关闭照相机 if(camera!=null){ camera.release(); camera.stopPreview(); camera=null; } } });//将图片大小进行压缩,图片压缩技术(字节数组转成Bitmap), //通过文件输出流FileOutputStream的形式将图片进行压缩
public void takePhoto(View view) { camera.takePicture(null, null, new Camera.PictureCallback() { @Override public void onPictureTaken(byte[] bytes, Camera camera) { //实例化文件输出流 //写 //压缩（图片） //将字节数组转成Bitmap Bitmap bitmap=BitmapFactory.decodeByteArray(bytes,0,bytes.length); try { FileOutputStream fos=new FileOutputStream("/mnt/sdcard/dcim/相机/G150831_"+System.currentTimeMillis()+".png"); bitmap.compress(Bitmap.CompressFormat.PNG,85,fos); //重新继续拍照 camera.stopPreview(); camera.startPreview(); } catch (FileNotFoundException e) { e.printStackTrace(); } } }); }新闻热点
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