Android

Android使用相机

这里介绍在Android相机相关开发中可能遇到的一些问题，和完整代码分享

  1. 设置预览和保存图像的方向
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//STEP #1: Get rotation degrees
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_BACK, info);
int rotation = context.getWindowManager().getDefaultDisplay().getRotation();
int degrees = 0;
switch (rotation) {
    case Surface.ROTATION_0: degrees = 0; break; //Natural orientation
        case Surface.ROTATION_90: degrees = 90; break; //Landscape left
        case Surface.ROTATION_180: degrees = 180; break;//Upside down
        case Surface.ROTATION_270: degrees = 270; break;//Landscape right
    }
int rotate = (info.orientation - degrees + 360) % 360;
	
//STEP #2: Set the 'rotation' parameter
Camera.Parameters params = camera.getParameters();
params.setRotation(rotate); //保存时的图像竖着
camera.setDisplayOrientation(rotate);//预览图像竖着
camera.setParameters(params);