Android人像模式下的Zxing摄像头
我想在Zxing的相机上显示portrait方向。
如何做到这一点？
回答 9
Stack Overflow用户
发布于 2013-04-27 21:54:21
下面是它的工作原理。
第一步:在( data data，int width，int height)中，添加以下行旋转数据之前的数据
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);第二步:修改getFramingRectInPreview()**.**
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;步骤3:在 initFromCameraParameters(...)中禁用横向模式检查
CameraConfigurationManager.java
//remove the following
if (width < height) {
Log.i(TAG, "Display reports portrait orientation; assuming this is incorrect");
int temp = width;
width = height;
height = temp;
}第四步:在**setDesiredCameraParameters(...)**中添加以下代码行旋转摄像头
CameraConfigurationManager.java
camera.setDisplayOrientation(90);第5步:不要忘记将活动的方向设置为纵向。即:清单
Stack Overflow用户
发布于 2015-02-07 04:34:24
要支持所有方向并在旋转活动时自动更改，只需修改CameraManager.javaclass.即可
并从CaptureActivity.java中删除此方法getCurrentOrientation()
CameraManager.java中的创建此变量：
int resultOrientation;将此代码添加到openDriver(..)方法：
setCameraDisplayOrientation(context, Camera.CameraInfo.CAMERA_FACING_BACK, theCamera);//this can be set after camera.setPreviewDisplay(); in api13+.*创建此方法*链接：http://developer.android.com/reference/android/hardware/Camera.html
public static void setCameraDisplayOrientation(Context context,int cameraId, android.hardware.Camera camera) {
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
android.hardware.Camera.getCameraInfo(cameraId, info);
Display display = ((WindowManager)context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
int degrees = 0;
switch (display.getRotation()) {
case Surface.ROTATION_0: degrees = 0; break;
case Surface.ROTATION_90: degrees = 90; break;
case Surface.ROTATION_180: degrees = 180; break;
case Surface.ROTATION_270: degrees = 270; break;
}
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
resultOrientation = (info.orientation + degrees) % 360;
resultOrientation = (360 - resultOrientation) % 360; // compensate the mirror
} else { // back-facing
resultOrientation = (info.orientation - degrees + 360) % 360;
}
camera.setDisplayOrientation(resultOrientation);
}*现在修改getFramingRectInPreview()*
if(resultOrientation == 180 || resultOrientation == 0){//to work with landScape and reverse landScape
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;
}else{
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;
}并将此方法修改为公共PlanarYUVLuminanceSource buildLuminanceSource(..)
if(resultOrientation == 180 || resultOrientation == 0){//TODO: This is to use camera in landScape mode
// Go ahead and assume it's YUV rather than die.
return new PlanarYUVLuminanceSource(data, width, height, rect.left, rect.top, rect.width(), rect.height(), false);
}else{
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;
return new PlanarYUVLuminanceSource(rotatedData, width, height, rect.left, rect.top, rect.width(), rect.height(), false);
}Stack Overflow用户
发布于 2013-09-06 11:59:44
您可以使用我的zxlib https://github.com/rusfearuth/zxing-lib-without-landscape-only分支。我只禁用了横向模式。您可以设置横向/纵向和查看正确的相机视图。
https://stackoverflow.com/questions/16252791
复制相似问题
腾讯云开发者
