Android开发片段调用系统相机拍照

初始化相机

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private void initCamera() {setContentView(R.layout.main);btnTake = (Button) this.findViewById(R.id.take);btnTake.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {camera.autoFocus(new AutoFocusCallback());}});Display display = getWindowManager().getDefaultDisplay();surfaceView = (SurfaceView) this.findViewById(R.id.mSurfaceView1);surfaceView.getHolder().setFixedSize(display.getWidth(),display.getHeight()); // 设置分辨率/* 下面设置Surface不维护自己的缓冲区，而是等待屏幕的渲染引擎将内容推送到用户面前 */surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);surfaceView.getHolder().addCallback(new SurfaceCallback());}

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回调函数类

?private final class SurfaceCallback implements SurfaceHolder.Callback {

@Overridepublic void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {}@Overridepublic void surfaceCreated(SurfaceHolder holder) {try {camera = Camera.open();Camera.Parameters parameters = camera.getParameters();// parameters.setPreviewSize(1024, 768);//设置预览照片的大小// parameters.setPreviewFrameRate(3);//每秒3帧parameters.setPictureFormat(PixelFormat.JPEG);// 设置照片的输出格式parameters.set("jpeg-quality", quality);// 照片质量parameters.setPictureSize(photoWidth, photoHeight);// 设置照片的大小parameters.set("orientation", "landscape");// parameters.set("orientation", "portrait");// parameters.set("rientation", "90");// camera.setDisplayOrientation(90);// parameters.set("rotation", "180");// parameters.set("orientation", "landscape");parameters.setRotation(180);camera.setParameters(parameters);camera.setPreviewDisplay(surfaceView.getHolder());// 通过SurfaceView显示取景画面camera.startPreview();// 开始预览preview = true;} catch (IOException e) {Log.e(TAG, e.toString());}}@Overridepublic void surfaceDestroyed(SurfaceHolder holder) {if (camera != null) {if (preview)camera.stopPreview();camera.release();}}}

?自动对焦

private final class AutoFocusCallback implements Camera.AutoFocusCallback {@Overridepublic void onAutoFocus(boolean success, Camera camera) {camera.takePicture(null, null, new TakePictureCallback());}}

?拍照保存

private final class TakePictureCallback implements PictureCallback {@Overridepublic void onPictureTaken(byte[] data, Camera camera) {try {Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0,data.length);File file = new File(temPath);FileOutputStream outStream = new FileOutputStream(file);// Bitmap 旋转Matrix vMatrix = new Matrix();vMatrix.setRotate(270);Bitmap vB2 = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth() // 宽度, bitmap.getHeight() // 高度, vMatrix, true);vB2.compress(CompressFormat.JPEG, 100, outStream);outStream.close();camera.stopPreview();// savePhoto();setReview();} catch (Exception e) {Log.e(TAG, e.toString());}}}