網上找的挺不錯的圖片壓縮代碼

標籤：test   encode   attribute   read   oat   span   phi   拍照   res   

package test.yc.com.fragmentdemo;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Matrix;import android.media.ExifInterface;import android.util.Base64;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;/** * Created by uctimes on 2016/10/22. */public class BitMapUtils {    //計算圖片的縮放值    public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {        final int height = options.outHeight;        final int width = options.outWidth;        int inSampleSize = 1;        if (height > reqHeight || width > reqWidth) {            final int heightRatio = Math.round((float) height/ (float) reqHeight);            final int widthRatio = Math.round((float) width / (float) reqWidth);            inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;        }        return inSampleSize;    }    // 根據路徑獲得圖片並壓縮，返回bitmap用於顯示    public static Bitmap getSmallBitmap(String filePath) {        final BitmapFactory.Options options = new BitmapFactory.Options();        options.inJustDecodeBounds = true;        BitmapFactory.decodeFile(filePath, options);        // Calculate inSampleSize        options.inSampleSize = calculateInSampleSize(options, 480, 800);        // Decode bitmap with inSampleSize set        options.inJustDecodeBounds = false;        return BitmapFactory.decodeFile(filePath, options);    }    //把bitmap轉換成String    public static String bitmapToString(String filePath) {        Bitmap bm = getSmallBitmap(filePath);        ByteArrayOutputStream baos = new ByteArrayOutputStream();        bm.compress(Bitmap.CompressFormat.JPEG, 40, baos);        byte[] b = baos.toByteArray();        return Base64.encodeToString(b, Base64.DEFAULT);    }//    /*//壓縮圖片，處理某些手機拍照角度旋轉的問題//*///    public static String compressImage(Context context, String filePath, String fileName, int q) throws FileNotFoundException {////        Bitmap bm = getSmallBitmap(filePath);////        int degree = readPictureDegree(filePath);////        if(degree!=0){//旋轉照片角度//            bm=rotateBitmap(bm,degree);//        }////        File imageDir = SDCardUtils.getImageDir(context);////        File outputFile=new File(imageDir,fileName);////        FileOutputStream out = new FileOutputStream(outputFile);////        bm.compress(Bitmap.CompressFormat.JPEG, q, out);////        return outputFile.getPath();//    }////    //判斷照片角度//    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;//    }////旋轉照片//    public static Bitmap rotateBitmap(Bitmap bitmap,int degress) {//        if (bitmap != null) {//            Matrix m = new Matrix();//            m.postRotate(degress);//            bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(),//                    bitmap.getHeight(), m, true);//            return bitmap;//        }//        return bitmap;//    }}

 

網上找的挺不錯的圖片壓縮代碼