最近开发B端产品,遇到了一个恶心的问题。就是调用三星手机的系统照相机问题。当调用相机拍照,保存的图片与实际效果相差90度。
找了好多资料发现,三星手机拍照默认(竖屏)方向为90度,而其他的手机入,小米,华为,锤子等等都是默认0度。了解了这些之后
就有了解决思路。
首先我们要知道手机的品牌。
public static String getBrand() {
return android.os.Build.BRAND;
}
第二要获得照片角度。
public static int readPictureDegree(String path) { int degree = 0; try { ExifInterface exifInterface = new ExifInterface(path); int orientation = exifInterface.getAttributeInt( ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL); switch (orientation) { case ExifInterface.ORIENTATION_ROTATE_90: degree = 90; break; case ExifInterface.ORIENTATION_ROTATE_180: degree = 180; break; case ExifInterface.ORIENTATION_ROTATE_270: degree = 270; break; } } catch (IOException e) { e.printStackTrace(); } return degree; }第三就是图片的旋转。
/** * 选择变换 * * @param origin 原图 * @param alpha 旋转角度,可正可负 * @return 旋转后的图片 */ public static Bitmap rotateBitmap(Bitmap origin, float alpha) { if (origin == null) { return null; } int width = origin.getWidth(); int height = origin.getHeight(); Matrix matrix = new Matrix(); matrix.setRotate(alpha); // 围绕原地进行旋转 Bitmap newBM = Bitmap.createBitmap(origin, 0, 0, width, height, matrix, false); if (newBM.equals(origin)) { return newBM; } origin.recycle(); return newBM; }最后只需要将Bitmap保存到指定的文件夹就可以了。
下面给代价提供一个BitmapUtils工具类
public class BitmapUtils { public static int readPictureDegree(String path) { int degree = 0; try { ExifInterface exifInterface = new ExifInterface(path); int orientation = exifInterface.getAttributeInt( ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL); switch (orientation) { case ExifInterface.ORIENTATION_ROTATE_90: degree = 90; break; case ExifInterface.ORIENTATION_ROTATE_180: degree = 180; break; case ExifInterface.ORIENTATION_ROTATE_270: degree = 270; break; } } catch (IOException e) { e.printStackTrace(); } return degree; } /** * 根据给定的宽和高进行拉伸 * * @param origin 原图 * @param newWidth 新图的宽 * @param newHeight 新图的高 * @return new Bitmap */ public static Bitmap scaleBitmap(Bitmap origin, int newWidth, int newHeight) { if (origin == null) { return null; } int height = origin.getHeight(); int width = origin.getWidth(); float scaleWidth = ((float) newWidth) / width; float scaleHeight = ((float) newHeight) / height; Matrix matrix = new Matrix(); matrix.postScale(scaleWidth, scaleHeight);// 使用后乘 Bitmap newBM = Bitmap.createBitmap(origin, 0, 0, width, height, matrix, false); if (!origin.isRecycled()) { origin.recycle(); } return newBM; } /** * 按比例缩放图片 * * @param origin 原图 * @param ratio 比例 * @return 新的bitmap */ public static Bitmap scaleBitmap(Bitmap origin, float ratio) { if (origin == null) { return null; } int width = origin.getWidth(); int height = origin.getHeight(); Matrix matrix = new Matrix(); matrix.preScale(ratio, ratio); Bitmap newBM = Bitmap.createBitmap(origin, 0, 0, width, height, matrix, false); if (newBM.equals(origin)) { return newBM; } origin.recycle(); return newBM; } /** * 裁剪 * * @param bitmap 原图 * @return 裁剪后的图像 */ public static Bitmap cropBitmap(Bitmap bitmap) { int w = bitmap.getWidth(); // 得到图片的宽,高 int h = bitmap.getHeight(); int cropWidth = w >= h ? h : w;// 裁切后所取的正方形区域边长 cropWidth /= 2; int cropHeight = (int) (cropWidth / 1.2); return Bitmap.createBitmap(bitmap, w / 3, 0, cropWidth, cropHeight, null, false); } /** * 选择变换 * * @param origin 原图 * @param alpha 旋转角度,可正可负 * @return 旋转后的图片 */ public static Bitmap rotateBitmap(Bitmap origin, float alpha) { if (origin == null) { return null; } int width = origin.getWidth(); int height = origin.getHeight(); Matrix matrix = new Matrix(); matrix.setRotate(alpha); // 围绕原地进行旋转 Bitmap newBM = Bitmap.createBitmap(origin, 0, 0, width, height, matrix, false); if (newBM.equals(origin)) { return newBM; } origin.recycle(); return newBM; } /** * 偏移效果 * @param origin 原图 * @return 偏移后的bitmap */ public static Bitmap skewBitmap(Bitmap origin) { if (origin == null) { return null; } int width = origin.getWidth(); int height = origin.getHeight(); Matrix matrix = new Matrix(); matrix.postSkew(-0.6f, -0.3f); Bitmap newBM = Bitmap.createBitmap(origin, 0, 0, width, height, matrix, false); if (newBM.equals(origin)) { return newBM; } origin.recycle(); return newBM; } }