在Android上以纵向模式Zxing相机
我想在Zxing的相机上显示portrait方向。
如何才能做到这一点？
这是如何工作的。
步骤1：在decode（byte [] data，int width，int height）中的 buildLuminanceSource(..)之前添加以下行来旋转数据buildLuminanceSource(..)
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：禁用在initFromCameraParameters(...)检查风景模式
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：添加以下行来旋转setDesiredCameraParameters(...)相机
CameraConfigurationManager.java
camera.setDisplayOrientation(90);
第五步：不要忘记设置活动的方向肖像。 即：清单
为了支持所有方向并在旋转活动时自动更改，只需要修改CameraManager.java类。
并从CaptureActivity.java中移除getCurrentOrientation（）方法
在CameraManager.java中创build这个variables：
int resultOrientation;
将其添加到openDriver（..）方法中：
setCameraDisplayOrientation(context, Camera.CameraInfo.CAMERA_FACING_BACK, theCamera);//this can be set after camera.setPreviewDisplay(); in api13+.
****创build这个方法****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); }
你可以使用我的fork的zxlib https://github.com/rusfearuth/zxing-lib-without-landscape-only 。 我只禁用了风景模式。 您可以设置横向/纵向并查看正确的相机视图。
添加camera.setDisplayOrientation(90); 在CameraConfigurationManager.java为我工作。
为zxing 3.0，工作lib https://github.com/xiaowei4895/zxing-android-portrait肖像模式;
谢谢
我认为最好的图书馆唯一的解决scheme是这一个…
https://github.com/SudarAbisheck/ZXing-Orient
你可以将它包含在build.gradle中，作为Maven格式的项目依赖项。
dependencies { compile ''me.sudar:zxing-orient:2.1.1@aar'' }
这应该是上述解决scheme的同步版本
https://github.com/zxing/zxing/tree/4b124b109d90ac2960078ce68e15a39885fc1b5b
除了@ roylee的修改，我不得不将以下应用到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,
创buildAnyOrientationCaptureActivity，然后重写默认CaptureActivity，然后它将工作。
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>
