Android开发之拍照后图片旋转的问题

经过测试,国产手机拍照无问题，国外手机拍照后自动选装90度了看图：主要有Google手机和三星手机都会有这个问题

解决办法也很简单说下思路：

首先获取图片被旋转的角度然后通过matrix.postRotate设置角度即可代码如下：

package com.wyze.mercury.common.utils;

import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.media.ExifInterface;
import android.util.Log;

import java.io.IOException;

/**
 * @author : xiayiye5
 * @date : 2021/4/28 17:39
 */
public class CommonTools {
    private static final CommonTools LOCATION_TOOLS = new CommonTools();

    private CommonTools() {
    }

    public static CommonTools getInstance() {
        return LOCATION_TOOLS;
    }

    /**
     * 读取照片exif信息中的旋转角度
     *
     * @param path 照片路径
     * @return 角度
     */
    public 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;
                default:
                    break;
            }
        } catch (IOException e) {
            Log.e("exception msg", Log.getStackTraceString(e));
        }
        return degree;
    }

    public Bitmap toReturn(Bitmap img, String path) {
        Matrix matrix = new Matrix();
        /*翻转90度*/
        matrix.postRotate(+readPictureDegree(path));
        int width = img.getWidth();
        int height = img.getHeight();
        img = Bitmap.createBitmap(img, 0, 0, width, height, matrix, true);
        return img;
    }
}

调用方法：

private fun setUploadImg(rlPicture: ImageView) {
        imgPath.let {
            val screenWidth = WpkCommonUtil.getScreenWidth();
            val decodeFile = BitmapFactory.decodeFile(imgPath)
            val width = decodeFile.width
            val size = width / screenWidth
            val newOpts = BitmapFactory.Options()
            newOpts.inJustDecodeBounds = false
            //设置缩放比例
            newOpts.inSampleSize = size * 2
            WpkLogUtil.e("打印缩放比例", "$size =")
            //重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了
            val bitmap = BitmapFactory.decodeFile(imgPath, newOpts);
            rlPicture.setImageBitmap(CommonTools.getInstance().toReturn(bitmap, it))
        }

看下前后效果图对比：

设置角度之前

设置角度之后

非常感谢原博主：原博主链接