gistfile1.txt public class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback, Camera.AutoFocusCallback{ private static final String TAG = "CameraSurfaceView"; private Context mContext; private SurfaceHolder holder; pri
public class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback, Camera.AutoFocusCallback{
private static final String TAG = "CameraSurfaceView";
private Context mContext;
private SurfaceHolder holder;
private Camera mCamera;
private int mScreenWidth;
private int mScreenHeight;
private CameraTopRectView topView;
private CameraCallback mCameraCallback;
public CameraSurfaceView(Context context) {
this(context, null);
}
public CameraSurfaceView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CameraSurfaceView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mContext = context;
getScreenMetrix(context);
topView = new CameraTopRectView(context,attrs);
initView();
}
//拿到手机屏幕大小
private void getScreenMetrix(Context context) {
WindowManager WM = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
DisplayMetrics outMetrics = new DisplayMetrics();
WM.getDefaultDisplay().getMetrics(outMetrics);
mScreenWidth = outMetrics.widthPixels;
mScreenHeight = outMetrics.heightPixels;
}
private void initView() {
holder = getHolder();//获得surfaceHolder引用
holder.addCallback(this);
// holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);//设置类型
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
Log.i(TAG, "surfaceCreated");
if (mCamera == null) {
mCamera = Camera.open();//开启相机
try {
mCamera.setPreviewDisplay(holder);//摄像头画面显示在Surface上
} catch (IOException e) {
e.printStackTrace();
}
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Log.i(TAG, "surfaceChanged");
setCameraParams(mCamera, mScreenWidth, mScreenHeight);
mCamera.startPreview();
// mCamera.takePicture(null, null, jpeg);
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.i(TAG, "surfaceDestroyed");
mCamera.stopPreview();//停止预览
mCamera.release();//释放相机资源
mCamera = null;
holder = null;
}
@Override
public void onAutoFocus(boolean success, Camera Camera) {
if (success) {
Log.i(TAG, "onAutoFocus success="+success);
System.out.println(success);
}
}
private void setCameraParams(Camera camera, int width, int height) {
Log.i(TAG,"setCameraParams width="+width+" height="+height);
Camera.Parameters parameters = mCamera.getParameters();
// 获取摄像头支持的PictureSize列表
List
pictureSizeList = parameters.getSupportedPictureSizes();
for (Camera.Size size : pictureSizeList) {
Log.i(TAG, "pictureSizeList size.width=" + size.width + " size.height=" + size.height);
}
/**从列表中选取合适的分辨率*/
Camera.Size picSize = getProperSize(pictureSizeList, ((float) height / width));
if (null == picSize) {
Log.i(TAG, "null == picSize");
picSize = parameters.getPictureSize();
}
Log.i(TAG, "picSize.width=" + picSize.width + " picSize.height=" + picSize.height);
// 根据选出的PictureSize重新设置SurfaceView大小
float w = picSize.width;
float h = picSize.height;
parameters.setPictureSize(picSize.width,picSize.height);
this.setLayoutParams(new FrameLayout.LayoutParams((int) (height*(h/w)), height));
// 获取摄像头支持的PreviewSize列表
List
previewSizeList = parameters.getSupportedPreviewSizes(); for (Camera.Size size : previewSizeList) { Log.i(TAG, "previewSizeList size.width=" + size.width + " size.height=" + size.height); } Camera.Size preSize = getProperSize(previewSizeList, ((float) height) / width); if (null != preSize) { Log.i(TAG, "preSize.width=" + preSize.width + " preSize.height=" + preSize.height); parameters.setPreviewSize(preSize.width, preSize.height); } parameters.setJpegQuality(100); // 设置照片质量 if (parameters.getSupportedFocusModes().contains(android.hardware.Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) { parameters.setFocusMode(android.hardware.Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);// 连续对焦模式 } mCamera.cancelAutoFocus();//自动对焦。 mCamera.setDisplayOrientation(90);// 设置PreviewDisplay的方向，效果就是将捕获的画面旋转多少度显示 mCamera.setParameters(parameters); } /** * 从列表中选取合适的分辨率 * 默认w:h = 4:3 *
注意：这里的w对应屏幕的height * h对应屏幕的width
*/ private Camera.Size getProperSize(List
pictureSizeList, float screenRatio) { Log.i(TAG, "screenRatio=" + screenRatio); Camera.Size result = null; for (Camera.Size size : pictureSizeList) { float currentRatio = ((float) size.width) / size.height; if (currentRatio - screenRatio == 0) { result = size; break; } } if (null == result) { for (Camera.Size size : pictureSizeList) { float curRatio = ((float) size.width) / size.height; if (curRatio == 4f / 3) {// 默认w:h = 4:3 result = size; break; } } } return result; } // 拍照瞬间调用 public Camera.ShutterCallback shutter = new Camera.ShutterCallback() { @Override public void onShutter() { Log.i(TAG,"shutter"); System.out.println("执行了吗+1"); } }; // 获得没有压缩过的图片数据 public Camera.PictureCallback raw = new Camera.PictureCallback() { @Override public void onPictureTaken(byte[] data, Camera Camera) { Log.i(TAG, "raw"); System.out.println("执行了吗+2"); } }; //创建jpeg图片回调数据对象 public Camera.PictureCallback jpeg = new Camera.PictureCallback() { private Bitmap bitmap; @Override public void onPictureTaken(byte[] data, Camera Camera) { topView.draw(new Canvas()); BufferedOutputStream bos = null; Bitmap bm = null; if(data != null){ } try { // 获得图片 bm = BitmapFactory.decodeByteArray(data, 0, data.length); if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { String filePath = "/sdcard/dyk"+System.currentTimeMillis()+".JPEG";//照片保存路径 // //图片存储前旋转 Matrix m = new Matrix(); int height = bm.getHeight(); int width = bm.getWidth(); m.setRotate(90); //旋转后的图片 bitmap = Bitmap.createBitmap(bm, 0, 0, width, height, m, true); System.out.println("执行了吗+3"); File file = new File(filePath); if (!file.exists()){ file.createNewFile(); } bos = new BufferedOutputStream(new FileOutputStream(file)); // Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, // data.length); Bitmap sizeBitmap = Bitmap.createScaledBitmap(bitmap, topView.getViewWidth(), topView.getViewHeight(), true); bm = Bitmap.createBitmap(sizeBitmap, topView.getRectLeft(), topView.getRectTop(), topView.getRectRight() - topView.getRectLeft(), topView.getRectBottom() - topView.getRectTop());// 截取 bm.compress(Bitmap.CompressFormat.JPEG, 100, bos);//将图片压缩到流中 }else{ Toast.makeText(mContext,"没有检测到内存卡", Toast.LENGTH_SHORT).show(); } } catch (Exception e) { e.printStackTrace(); } finally { try { bos.flush();//输出 bos.close();//关闭 bm.recycle();// 回收bitmap空间 mCamera.stopPreview();// 关闭预览 mCamera.startPreview();// 开启预览 } catch (IOException e) { e.printStackTrace(); } } } }; public void takePicture(){ //设置参数,并拍照 setCameraParams(mCamera, mScreenWidth, mScreenHeight); // 当调用camera.takePiture方法后，camera关闭了预览，这时需要调用startPreview()来重新开启预览 mCamera.takePicture(shutter,raw, jpeg); } // public void setAutoFocus(){ // mCamera.autoFocus(this); // } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); } public void setCameraCallback(CameraCallback callback){ mCameraCallback=callback; } public interface CameraCallback { void onCallback(Bitmap bm); } }