Zxing 竖屏切换 Android

Zxing 竖屏切换 Android在google上下载的ZxingDemo 为横屏状态我简单的在Androidmanifest.xml把Activity换成竖屏android:screenOrientation="portrait"

屏幕虽然正了但是屏幕上显示的拍摄画面还是横着的查了一些网上的资料结合自己手工调试在这里总结分享一下

步骤:

1）在AndroidManifest.xml中把 <Activity />标签 CaptureActivity 的screenOrientation修改为android:screenOrientation="portrait"2）在CameraManager.java类中的getFramingRectInPreview（）替换掉原先的 left right top bottom
//竖屏
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;3）在CameraConfigurationManager.java中void setDesiredCameraParameters（Camera camera）方法

在setParameters之前增加camera.setDisplayOrientation（90）;4）在DecodeHandler.java中的 decode（byte[] data, int width, int height）方法在

PlanarYUVLuminanceSource source = CameraManager.get（）.buildLuminanceSource（data, width, height）;

之前添加: 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; // Here we are swapping, that"s the difference to #11
width = height;
height = tmp;
data = rotatedData;5）将CameraConfigurationManager的 initFromCameraParameters（Camera camera）方法整个替换如下

该方法防止竖屏后屏幕拉伸 /**
* Reads, one time, values from the camera that are needed by the app.
*/
void initFromCameraParameters（Camera camera） {
Camera.Parameters parameters = camera.getParameters（）;
previewFormat = parameters.getPreviewFormat（）;
previewFormatString = parameters.get（"preview-format"）;
Log.d（TAG, "Default preview format: " + previewFormat + "/"
+ previewFormatString）;
WindowManager manager = （WindowManager） context
.getSystemService（Context.WINDOW_SERVICE）;
Display display = manager.getDefaultDisplay（）;
screenResolution = new Point（display.getWidth（）, display.getHeight（））;
Log.d（TAG, "Screen resolution: " + screenResolution）;

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）;
// cameraResolution = getCameraResolution（parameters, screenResolution）;
Log.d（TAG, "Camera resolution: " + screenResolution）;
}至此Zxing 横屏就切换为竖屏

不足之处请在下方留言谢谢

希望对您有用

资源下载地址见 http://www.linuxidc.com/Linux/2014-05/101115.htm更多Android相关信息见Android 专题页面 http://www.linuxidc.com/topicnews.aspx？tid=11本文永久更新链接地址：http://www.linuxidc.com/Linux/2014-05/101116.htm