橫屏顯示：
“`
DecodeHandler.java:
byte[] rotatedData = new byte[data.length];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++)
rotatedData[x * height + height - y - 1] = data[x + y * width];
}
int tmp = width;
width = height;
height = tmp;
PlanarYUVLuminanceSource source = activity.getCameraManager().buildLuminanceSource(rotatedData, width, height);
CameraManager.java
rect.left = rect.left * cameraResolution.y / screenResolution.x;
rect.right = rect.right * cameraResolution.y / screenResolution.x;
rect.top = rect.top * cameraResolution.x / screenResolution.y;
rect.bottom = rect.bottom * cameraResolution.x / screenResolution.y;
“`在AndroidManifest.xml中，把Activity的屬性android:screenOrientation=”landscape”
/****************/
豎屏顯示：
1、修改AndroidManifest文件，將CaptureActivity設爲portrait：
代碼爲：android:configChanges=”orientation|keyboardHidden”
android:screenOrientation=”portrait”
2、把攝像頭預覽景調爲豎向，具體如下：
1）在CameraConfigurationManager類裏的setDesiredCameraParameters(Camera camera)方法裏添加如下代 碼：
//攝像頭旋轉90度
setDisplayOrientation(camera, 90);
2）然後在CameraConfigurationManager類裏面添加setDisplayOrientation(Camera camera, int angle)方法，方法具體代碼如下：
protected void setDisplayOrientation(Camera camera, int angle) {
Method downPolymorphic;
try {
downPolymorphic = camera.getClass().getMethod(“setDisplayOrientation”, new Class[] { int.class });
if (downPolymorphic != null)
downPolymorphic.invoke(camera, new Object[] { angle });
} catch (Exception e1) {
e1.printStackTrace();
}
}
3）最後，爲了防止攝像頭豎過來後圖像拉伸的問題，需要在CameraConfigurationManager類中的initFromCameraParameters(Camera camera)方法的Log.d(TAG, “Screen resolution: ” + screenResolution);語句後面添加如下代碼：
//解決豎屏後圖像拉伸問題
Point screenResolutionForCamera = new Point();
screenResolutionForCamera.x = screenResolution.x;
screenResolutionForCamera.y = screenResolution.y;
// preview size is always something like 480*320, other 320*480
if (screenResolution.x < screenResolution.y) {
screenResolutionForCamera.x = screenResolution.y;
screenResolutionForCamera.y = screenResolution.x;
}
cameraResolution = getCameraResolution(parameters, screenResolutionForCamera);
3、把CameraManager類中getFramingRectInPreview()方法中的代碼做如下修改：
將：//橫屏模式
rect.left = rect.left * cameraResolution.x / screenResolution.x;
rect.right = rect.right * cameraResolution.x / screenResolution.x;
rect.top = rect.top * cameraResolution.y / screenResolution.y;
rect.bottom = rect.bottom * cameraResolution.y / screenResolution.y;
替換爲：
//豎屏模式
rect.left = rect.left * cameraResolution.y / screenResolution.x;
rect.right = rect.right * cameraResolution.y / screenResolution.x;
rect.top = rect.top * cameraResolution.x / screenResolution.y;
rect.bottom = rect.bottom * cameraResolution.x / screenResolution.y;
4、在DecodeHandler類中的decode(byte[] data, int width, int height)方法中，在buildLuminanceSource調用前添加如下代碼：
//豎屏
byte[] rotatedData = new byte[data.length];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++)
rotatedData[x * height + height - y - 1] = data[x + y * width];
}
int tmp = width;
width = height;
height = tmp;
如有不足歡迎指正。。。。
