介绍多张图片压缩转Bas64速度优化问题

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今天项目有一个需求,要求多张图片上传,并且时间在7秒左右,废话不多说上效果图
效果图
我解决的方案有二种:

  1. 第一种是用线程的方式去上传图片,结果发现同时压缩4M的图非常的慢,以及中途转Bas64用时20多秒,当然这根据机型而定,代码非常的简单我还是贴出来:
StringBuffer stringBuffer = new StringBuffer();            for (int i = 0; i < list.size(); i++) {                Bitmap bitmap = getBitmap(list.get(i));                String path = SaveBitmap(bitmap, i);//                fileList.add(path);                Bitmap bitmapNew = ImageUtil.getLocalBitmap(path);                String photoString = NativeUtil.getcomImageBase64(bitmapNew);                stringBuffer.append(photoString).append(",");            }           String mIamgeString = stringBuffer.toString().substring(0, stringBuffer.length() - 1);`

2.第二种方式是用AsyncTask,我直接贴代码了:

package com.sdy.zhuanqianbao.kit;import android.app.ProgressDialog;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.AsyncTask;import android.os.Environment;import java.io.File;import java.io.FileOutputStream;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.List;/** * Created by csl on 2017/8/17. */public class CompressPhotoUtils {    private List<String> fileList = new ArrayList<>();    private ProgressDialog progressDialog;    private static File file;    public void CompressPhoto(Context context, List<String> list, CompressCallBack callBack) {        CompressTask task = new CompressTask(context, list, callBack);        task.execute();    }    class CompressTask extends AsyncTask<Void, Integer, String> {        private Context context;        private List<String> list;        private CompressCallBack callBack;        CompressTask(Context context, List<String> list, CompressCallBack callBack) {            this.context = context;            this.list = list;            this.callBack = callBack;            if (DeviceUtils.isExitsSdcard()) {                String filePath = Environment.getExternalStorageDirectory() + "/huizhuan/upload";                file = new File(filePath);            }        }        /**         * 运行在UI线程中,在调用doInBackground()之前执行         */        @Override        protected void onPreExecute() {//            progressDialog = ProgressDialog.show(context, null, "处理中...");        }        /**         * 后台运行的方法,可以运行非UI线程,可以执行耗时的方法         */        @Override        protected String doInBackground(Void... params) {            StringBuffer stringBuffer = new StringBuffer();            for (int i = 0; i < list.size(); i++) {                Bitmap bitmap = getBitmap(list.get(i));                String path = SaveBitmap(bitmap, i);//                fileList.add(path);                Bitmap bitmapNew = ImageUtil.getLocalBitmap(path);                String photoString = NativeUtil.getcomImageBase64(bitmapNew);                stringBuffer.append(photoString).append(",");            }           String mIamgeString = stringBuffer.toString().substring(0, stringBuffer.length() - 1);            if (file.exists()){                FileUtils.delete(file);            }            return mIamgeString;        }        /**         * 运行在ui线程中,在doInBackground()执行完毕后执行         */        @Override        protected void onPostExecute(String imageString) {//            progressDialog.dismiss();            callBack.success(imageString);        }        /**         * 在publishProgress()被调用以后执行,publishProgress()用于更新进度         */        @Override        protected void onProgressUpdate(Integer... values) {        }    }    /**     * 从sd卡获取压缩图片bitmap     */    public static Bitmap getBitmap(String srcPath) {        BitmapFactory.Options newOpts = new BitmapFactory.Options();        newOpts.inJustDecodeBounds = true;        Bitmap bitmap = BitmapFactory.decodeFile(srcPath, newOpts);        newOpts.inJustDecodeBounds = false;        int w = newOpts.outWidth;        int h = newOpts.outHeight;        float hh = 800f;        float ww = 480f;        // 缩放比。由于是固定比例缩放,只用高或者宽其中一个数据进行计算即可        int be = 1;// be=1表示不缩放        if (w > h && w > ww) {// 如果宽度大的话根据宽度固定大小缩放            be = (int) (newOpts.outWidth / ww);        } else if (w < h && h > hh) {// 如果高度高的话根据宽度固定大小缩放            be = (int) (newOpts.outHeight / hh);        }        newOpts.inSampleSize = be;// 设置缩放比例        bitmap = BitmapFactory.decodeFile(srcPath, newOpts);        return bitmap;    }    /**     * 保存bitmap到内存卡     */    public static String SaveBitmap(Bitmap bmp, int num) {        String path = null;        if (!file.exists()){            file.mkdirs();        }        try {            SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");            String picName = formatter.format(new Date());            path = file.getPath() + "/" + picName + "-" + num + ".jpg";            FileOutputStream fileOutputStream = new FileOutputStream(path);            bmp.compress(Bitmap.CompressFormat.JPEG, 50, fileOutputStream);            fileOutputStream.flush();            fileOutputStream.close();        } catch (Exception e) {            e.printStackTrace();        }        return path;    }    public interface CompressCallBack {        void success(String imageString);    }}

然后Activity里面主要用:

 //图片转base64        if (listImgPath.size() != 0) {            new CompressPhotoUtils().CompressPhoto(MarketFeedBackActivity.this, listImgPath, new                    CompressPhotoUtils.CompressCallBack() {                        @Override                        public void success(String imageString) {                            upload(imageString);  //执行上传的方法                        }                    });        }

这样就完成了,从20多秒变成5-6秒就成功上传图片了,从数据库里面成功看到上传完成以后数据库这里写图片描述
作者:工程师丶佛爷
有更好的优化方案欢迎留言,谢谢.

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