安卓简单图片处理程序

接上一篇博客，在图片上传下载过程中，常常需要对图片进行一些简单的处理，例如压缩，调正，转换形式等等

现介绍一些简单的处理程序

import android.content.Context;
import android.graphics.Bitmap;import android.graphics.Bitmap.CompressFormat;import android.graphics.BitmapFactory;import android.graphics.Matrix;import android.graphics.drawable.BitmapDrawable;import android.media.ExifInterface;import android.util.Log;import android.widget.ImageView;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.util.Date;/** * Created by user on 2016/10/7. */public class UploadPhotoUtil<MultipartEntity> {    final static int BUFFER_SIZE = 1024;    public static UploadPhotoUtil uploadPhotoUtil;    public static UploadPhotoUtil getInstance() {        if (uploadPhotoUtil == null) {            uploadPhotoUtil = new UploadPhotoUtil();        }        return uploadPhotoUtil;    }    public String getFileType(String fileName) {        return fileName.substring(fileName.lastIndexOf(".") + 1,                fileName.length());    }    public String getUploadBitmapZoomString(String filePath) {        String fileString = "";        try {            Bitmap bitmap = trasformToZoomBitmapAndLessMemory(filePath);            ByteArrayOutputStream bos = new ByteArrayOutputStream();            bitmap.compress(CompressFormat.PNG, 100, bos);            byte[] result = bos.toByteArray();            fileString = new String(result, "ISO-8859-1");        } catch (Exception e) {            e.printStackTrace();        }        return fileString;    }    public static byte[] InputStreamTOByteArray(InputStream in)            throws IOException {        ByteArrayOutputStream outStream = new ByteArrayOutputStream();        int count;        byte[] data = new byte[BUFFER_SIZE];        while ((count = in.read(data, 0, BUFFER_SIZE)) != -1) {            outStream.write(data, 0, count);        }        outStream.close();        return outStream.toByteArray();    }    /* 如果有些手机拍照反转，读取角度*/    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;            }        } catch (IOException e) {            e.printStackTrace();        }        return degree;    }    /* 如果有些手机拍照反转，那么把图片调正 */    public Bitmap rotaingImageView(int angle, Bitmap bitmap) {        Matrix matrix = new Matrix();        matrix.postRotate(angle);        System.out.println("angle2=" + angle);        Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0,bitmap.getWidth(), bitmap.getHeight(), matrix, true);        return resizedBitmap;    }    public Bitmap trasformToZoomBitmapAndLessMemory(String url) {        File file = new File(url);        Log.d("logout", "file.length()---------------------" + file.length());        BitmapFactory.Options options = new BitmapFactory.Options();        options.inJustDecodeBounds = true;        int inSampleSize = 1;        if (file.length() < 256 * 1024) {            options.inPreferredConfig = Bitmap.Config.RGB_565;        } else if (file.length() < 512 * 1024) {            options.inPreferredConfig = Bitmap.Config.RGB_565;            options.inSampleSize = 2;            inSampleSize = 2;        } else if (file.length() < 1024 * 1024) {            options.inPreferredConfig = Bitmap.Config.RGB_565;            options.inSampleSize = 4;            inSampleSize = 4;        } else {            options.inPreferredConfig = Bitmap.Config.RGB_565;            options.inSampleSize = 6;            inSampleSize = 6;        }        //options.inPurgeable = true;        //options.inInputShareable = true;        options.inJustDecodeBounds = false;        Log.d("gaolei", "inSampleSize-----------------" + inSampleSize);        int degree = readPictureDegree(file.getAbsolutePath());        InputStream is = null;        try {            is = new FileInputStream(url);        } catch (FileNotFoundException e) {            e.printStackTrace();        }        Bitmap cameraBitmap = BitmapFactory.decodeStream(is, null, options);        // Bitmap cameraBitmap = BitmapFactory.decodeFile(url, options);        Bitmap photo = rotaingImageView(degree, cameraBitmap);        if (is != null) {            try {                is.close();            } catch (IOException e) {                e.printStackTrace();            }        }        return photo;    }    //注意显示本地图片时一定要压缩质量，不然容易出现OOM    public Bitmap trasformToZoomPhotoAndLessMemory(String url) {        File file = new File(url);        Log.d("gaolei", "file.length()--------original-------------" + file.length());        BitmapFactory.Options options = new BitmapFactory.Options();        // 通过这个bitmap获取图片的宽和高        options.inJustDecodeBounds = true;        int inSampleSize = 1;        if (file.length() < 256 * 1024) {            options.inPreferredConfig = Bitmap.Config.ARGB_8888;        } else if (file.length() < 512 * 1024) {            options.inPreferredConfig = Bitmap.Config.RGB_565;            options.inSampleSize = 2;            inSampleSize = 2;        } else if (file.length() < 1024 * 1024) {            options.inPreferredConfig = Bitmap.Config.RGB_565;            options.inSampleSize = 4;            inSampleSize = 4;        } else {            options.inPreferredConfig = Bitmap.Config.RGB_565;            options.inSampleSize = 6;            inSampleSize = 6;        }        //options.inPurgeable = true;        // options.inInputShareable = true;        // 注意这次要把options.inJustDecodeBounds 设为 false,这次图片是要读取出来的        options.inJustDecodeBounds = false;        Log.d("gaolei", "inSampleSize-----------------" + inSampleSize);        int degree = readPictureDegree(file.getAbsolutePath());        // Log.d("gaolei", "degree------------uploadImg--------------" +        // degree);        InputStream is = null;        try {            is = new FileInputStream(url);        } catch (FileNotFoundException e) {            e.printStackTrace();        }        Bitmap cameraBitmap = BitmapFactory.decodeStream(is, null, options);        // Bitmap cameraBitmap = BitmapFactory.decodeFile(url, options);        Bitmap photo = rotaingImageView(degree, cameraBitmap);        if (is != null) {            try {                is.close();            } catch (IOException e) {                e.printStackTrace();            }        }        return photo;    }    public Bitmap trasformToZoomBitmapInHeightAndWidth(Context context,                                                       String url) {        BitmapFactory.Options options = new BitmapFactory.Options();        options.inPreferredConfig = Bitmap.Config.RGB_565;        options.inJustDecodeBounds = true;        BitmapFactory.decodeFile(url, options);        options.inSampleSize = calculateInSampleSize(options, CommonUtils                .getUtilInstance().dp2px(context, 80), CommonUtils                .getUtilInstance().dp2px(context, 80));        // options.inPurgeable = true;        //options.inInputShareable = true;        options.inJustDecodeBounds = false;        File file = new File(url);        int degree = readPictureDegree(file.getAbsolutePath());        InputStream is = null;        try {            is = new FileInputStream(url);        } catch (FileNotFoundException e) {            e.printStackTrace();        }        Bitmap cameraBitmap = BitmapFactory.decodeStream(is, null, options);        // Bitmap cameraBitmap = BitmapFactory.decodeFile(url, options);        Bitmap photo = rotaingImageView(degree, cameraBitmap);        if (is != null) {            try {                is.close();            } catch (IOException e) {                e.printStackTrace();            }        }        return photo;    }    public void setImageDrawable(Context context, ImageView imageView,                                 int drawable) {        BitmapFactory.Options opt = new BitmapFactory.Options();        opt.inPreferredConfig = Bitmap.Config.RGB_565;        //opt.inPurgeable = true;        // opt.inInputShareable = true;        InputStream is = context.getResources().openRawResource(drawable);        Bitmap bitmap = BitmapFactory.decodeStream(is, null, opt);        try {            is.close();        } catch (IOException e) {            e.printStackTrace();        }        BitmapDrawable bd = new BitmapDrawable(context.getResources(), bitmap);        imageView.setImageDrawable(bd);    }    public 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 = (int) Math.floor(height / reqHeight);            final int widthRatio = (int) Math.floor(width / reqWidth);            inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;        }        return inSampleSize;    }}