SHOW:
|
|
- or go back to the newest paste.
| 1 | /* | |
| 2 | * Camera management | |
| 3 | */ | |
| 4 | ||
| 5 | /** | |
| 6 | * Selects the last used camera or a front-facing one | |
| 7 | */ | |
| 8 | public void selectCamera() | |
| 9 | {
| |
| 10 | int cameraID = preferences.getInt("cameraID", -1);
| |
| 11 | if (cameraID == -1) | |
| 12 | {
| |
| 13 | // no camera was selected previously, select a front-facing one | |
| 14 | int nCameras = Camera.getNumberOfCameras(); | |
| 15 | ||
| 16 | CameraInfo cameraInfo = new CameraInfo(); | |
| 17 | for (int i = 0; i < nCameras; i++) | |
| 18 | {
| |
| 19 | Camera.getCameraInfo(i, cameraInfo); | |
| 20 | if (cameraInfo.facing == CameraInfo.CAMERA_FACING_FRONT) | |
| 21 | {
| |
| 22 | cameraID = i; | |
| 23 | } | |
| 24 | } | |
| 25 | ||
| 26 | // there's no front camera | |
| 27 | if (cameraID == -1) | |
| 28 | {
| |
| 29 | cameraID = 0; | |
| 30 | } | |
| 31 | } | |
| 32 | ||
| 33 | setPreviewSurface(previewSurface); | |
| 34 | setupCamera(cameraID); | |
| 35 | } | |
| 36 | ||
| 37 | /** | |
| 38 | * Sets the camera used for face detection | |
| 39 | * | |
| 40 | * @param cameraID the ID of the camera to use | |
| 41 | */ | |
| 42 | public void setupCamera(int cameraID) | |
| 43 | {
| |
| 44 | // release previous one | |
| 45 | if (camera != null) | |
| 46 | {
| |
| 47 | camera.release(); | |
| 48 | camera = null; | |
| 49 | } | |
| 50 | ||
| 51 | // save selection | |
| 52 | Editor editor = preferences.edit(); | |
| 53 | editor.putInt("cameraID", cameraID);
| |
| 54 | editor.commit(); | |
| 55 | ||
| 56 | try | |
| 57 | {
| |
| 58 | // open camera | |
| 59 | camera = Camera.open(cameraID); | |
| 60 | ||
| 61 | // get smallest available preview size | |
| 62 | Parameters params = camera.getParameters(); | |
| 63 | List<Size> psizes = params.getSupportedPreviewSizes(); | |
| 64 | Collections.sort(psizes, new Comparator<Size>() | |
| 65 | {
| |
| 66 | @Override | |
| 67 | public int compare(Size size1, Size size2) | |
| 68 | {
| |
| 69 | long pixels1 = size1.height * size1.width; | |
| 70 | long pixels2 = size2.height * size2.width; | |
| 71 | ||
| 72 | return (pixels1 < pixels2) ? -1 : (pixels1 > pixels2) ? 1 : 0; | |
| 73 | } | |
| 74 | }); | |
| 75 | Size smallest = psizes.get(0); | |
| 76 | params.setPreviewSize(smallest.width, smallest.height); | |
| 77 | ||
| 78 | // set preferred preview format | |
| 79 | params.setPreviewFormat(ImageFormat.NV21); | |
| 80 | ||
| 81 | // save parameters | |
| 82 | camera.setParameters(params); | |
| 83 | ||
| 84 | // set preview display | |
| 85 | camera.setPreviewDisplay(previewSurface.getHolder()); | |
| 86 | ||
| 87 | // set orientation | |
| 88 | CameraInfo info = new CameraInfo(); | |
| 89 | Camera.getCameraInfo(cameraID, info); | |
| 90 | WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); | |
| 91 | int _rotation = wm.getDefaultDisplay().getRotation(); | |
| 92 | int degrees = 0; | |
| 93 | switch (_rotation) | |
| 94 | {
| |
| 95 | case Surface.ROTATION_0: | |
| 96 | degrees = 0; | |
| 97 | break; | |
| 98 | case Surface.ROTATION_90: | |
| 99 | degrees = 90; | |
| 100 | break; | |
| 101 | case Surface.ROTATION_180: | |
| 102 | degrees = 180; | |
| 103 | break; | |
| 104 | case Surface.ROTATION_270: | |
| 105 | degrees = 270; | |
| 106 | break; | |
| 107 | } | |
| 108 | ||
| 109 | int result = (360 + info.orientation - degrees) % 360; | |
| 110 | rotation = degrees; | |
| 111 | ||
| 112 | camera.setDisplayOrientation(result); | |
| 113 | swapMetrics = (result % 180 == 0); | |
| 114 | ||
| 115 | // set camera in imageprocessor | |
| 116 | if (processor != null) | |
| 117 | processor.setCamera(camera, result); | |
| 118 | ||
| 119 | calculator.loadSettings(); | |
| 120 | ||
| 121 | // start preview | |
| 122 | camera.startPreview(); | |
| 123 | } | |
| 124 | catch (Exception e) | |
| 125 | {
| |
| 126 | // TODO Auto-generated catch block | |
| 127 | e.printStackTrace(); | |
| 128 | } | |
| 129 | } |
