我想在的相机上显示portrait方向。Zxing
如何才能做到这一点？
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9 回答
108
这是它的工作原理。
buildLuminanceSource(..)第 1 步：在decode(byte[] data, int width, int height)之前添加以下行以旋转数据
解码处理程序.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 2 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;
第 3 步：禁用对横向模式的检查initFromCameraParameters(...)
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 4 步：添加以下行以旋转相机setDesiredCameraParameters(...)
CameraConfigurationManager.java
camera.setDisplayOrientation(90);
第 5 步：不要忘记将活动方向设置为纵向。即：清单
于 2013-04-27T13:54:21.313 回答
7
要支持所有方向并在旋转活动时自动更改，您只需修改CameraManager.java类。
并从CaptureActivity.java中删除此方法getCurrentOrientation()
在 CameraManager.java 创建这个变量：
int resultOrientation;
将此添加到 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;
}
并修改此方法public 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);
}
于 2015-02-06T20:34:23.760 回答
5
你可以使用我的 zxlib 分支https://github.com/rusfearuth/zxing-lib-without-landscape-only。我只禁用了横向模式。您可以设置横向/纵向并查看正确的相机视图。
于 2013-09-06T03:59:44.160 回答
3
添加camera.setDisplayOrientation(90);对CameraConfigurationManager.java我有用。
于 2015-09-10T10:05:03.487 回答
2
对于 zxing 3.0，工作库https://github.com/xiaowei4895/zxing-android-portrait 用于纵向模式
谢谢
于 2015-05-14T10:03:29.497 回答
2
我认为最好的图书馆唯一解决方案是这个......
https://github.com/SudarAbisheck/ZXing-Orient
您可以将其包含在 build.gradle 中，作为 maven 格式的项目的依赖项...
dependencies {
compile ''me.sudar:zxing-orient:2.1.1@aar''
}
于 2016-05-30T03:30:38.370 回答
2
创建 AnyOrientationCaptureActivity 然后覆盖默认 CaptureActivity 然后它将起作用。
public void scanCode() {
IntentIntegrator integrator = new IntentIntegrator(this);
integrator.setDesiredBarcodeFormats(CommonUtil.POSEIDON_CODE_TYPES);
integrator.setPrompt("Scan");
integrator.setCameraId(0);
integrator.setBeepEnabled(false);
integrator.setBarcodeImageEnabled(false);
integrator.setOrientationLocked(false);
//Override here
integrator.setCaptureActivity(AnyOrientationCaptureActivity.class);
integrator.initiateScan();
}
//create AnyOrientationCaptureActivity extend CaptureActivity
public class AnyOrientationCaptureActivity extends CaptureActivity {
}
在清单中定义
<activity
android:name=".views.AnyOrientationCaptureActivity"
android:screenOrientation="fullSensor"
android:stateNotNeeded="true"
android:theme="@style/zxing_CaptureTheme"
android:windowSoftInputMode="stateAlwaysHidden"></activity>
于 2017-09-13T08:50:02.827 回答
1
于 2014-12-29T13:21:18.950 回答
1
除了@roylee 的修改之外，我还必须将以下内容应用于CameraConfigurationManager.java以获得最佳预览和 QR 码识别质量
diff --git a/android/src/com/google/zxing/client/android/camera/CameraConfigurationManager.java b/android/src/com/google/zxing/client/android/camera/CameraConfigurationManager.java
index cd9d0d8..4f12c8c 100644
--- a/android/src/com/google/zxing/client/android/camera/CameraConfigurationManager.java
+++ b/android/src/com/google/zxing/client/android/camera/CameraConfigurationManager.java
@@ -56,21 +56,24 @@ public final class CameraConfigurationManager {
Display display = manager.getDefaultDisplay();
int width = display.getWidth();
int height = display.getHeight();
- // We're landscape-only, and have apparently seen issues with display thinking it's portrait
+ // We're landscape-only, and have apparently seen issues with display thinking it's portrait
// when waking from sleep. If it's not landscape, assume it's mistaken and reverse them:
+ /*
if (width < height) {
Log.i(TAG, "Display reports portrait orientation; assuming this is incorrect");
int temp = width;
width = height;
height = temp;
}
+ */
screenResolution = new Point(width, height);
Log.i(TAG, "Screen resolution: " + screenResolution);
- cameraResolution = findBestPreviewSizeValue(parameters, screenResolution, false);
+ cameraResolution = findBestPreviewSizeValue(parameters, screenResolution, true);//
Log.i(TAG, "Camera resolution: " + cameraResolution);
}
void setDesiredCameraParameters(Camera camera) {
+ camera.setDisplayOrientation(90);
Camera.Parameters parameters = camera.getParameters();
if (parameters == null) {
@@ -99,7 +102,7 @@ public final class CameraConfigurationManager {
Point getScreenResolution() {
return screenResolution;
}
-
+
public void setFrontCamera(boolean newSetting) {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
boolean currentSetting = prefs.getBoolean(PreferencesActivity.KEY_FRONT_CAMERA, false);
@@ -109,12 +112,12 @@ public final class CameraConfigurationManager {
editor.commit();
}
}
-
+
public boolean getFrontCamera() {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
return prefs.getBoolean(PreferencesActivity.KEY_FRONT_CAMERA, false);
}
-
+
public boolean getTorch() {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
return prefs.getBoolean(PreferencesActivity.KEY_FRONT_LIGHT, false);
@@ -181,7 +184,14 @@ public final class CameraConfigurationManager {
Camera.Size defaultSize = parameters.getPreviewSize();
bestSize = new Point(defaultSize.width, defaultSize.height);
}
+
+ // FIXME: test the bestSize == null case!
+ // swap width and height in portrait case back again
+ if (portrait) {
+ bestSize = new Point(bestSize.y, bestSize.x);
+ }
return bestSize;
+
}
private static String findSettableValue(Collection<String> supportedValues,
于 2017-03-30T13:09:06.450 回答