jpegUtil添加公共的压缩方法

NowyXC · May 31, 2018 · 133f340 · 133f340
1 parent 61ee799
commit 133f340
Show file tree

Hide file tree

Showing 73 changed files with 37,718 additions and 6 deletions.
diff --git a/CommonLib/app/src/main/java/com/nowy/commonlib/JpegUtil.java b/CommonLib/app/src/main/java/com/nowy/commonlib/JpegUtil.java
@@ -1,11 +1,36 @@
 package com.nowy.commonlib;
 
+import android.content.Context;
 import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Matrix;
+import android.media.ExifInterface;
+import android.view.WindowManager;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
 
 /**
- * Created by Nowy on 2018/1/10.
+ * Created by Nowy on 2018/5/31.
+ *
+ *
+ *<br/>
+ * 图片压缩工具类
+ * 通过哈夫曼算法进行压缩
+ * 提供了两个压缩方法
+ *<br/>
+ *<br/>
+ * 1.compress(Context context,String filePath, String outputPath,int quality)<br/>
+ * 根据传入的质量进行图片压缩
+ *<br/>
+ * 2.compressSize(Context context,String filePath, String outputPath,int targetSize)<br/>
+ * 根据传入的目标大小进行图片压缩
+ *<br/>
+ * native方法为<br/>
+ * 3.compressBitmap(Bitmap bit, int w, int h, String fineName,int quality,boolean optimize)
  */
-
 public class JpegUtil {
     static {
         System.loadLibrary("compress");
@@ -16,6 +41,249 @@ private JpegUtil() {
     }
 
 
-    public static native boolean compressBitmap(Bitmap bit, int w, int h, String fineName,int quality,
+    /**
+     * 哈夫曼图片压缩
+     * @param bit 图片bmp
+     * @param w 图片的宽
+     * @param h 图片的高
+     * @param outputPath 文件输出路径(全称)，带上文件名xxx.jpeg
+     * @param quality 质量比(1~100);
+     * @param optimize 是否启用哈夫曼算法，true为启用
+     * @return true 图片压缩成功， false图片压缩失败
+     */
+    public static native boolean compressBitmap(Bitmap bit, int w, int h, String outputPath,int quality,
                                                 boolean optimize);
+
+
+    /**
+     * 通过JNI图片压缩并把Bitmap保存到指定目录
+     * @param filePath 源文件路径
+     * @param outputPath 输出路径
+     * @param quality 这里100表示保质量，还是会压缩
+     */
+    public static boolean compress(Context context,String filePath, String outputPath,int quality) {
+        //根据地址获取bitmap
+        Bitmap result = getBitmapFromFile(context,filePath);
+        int w = result.getWidth();
+        int h = result.getHeight();
+        boolean isSuccess = compressBitmap(result,w,h, outputPath,quality, true);
+        // 释放Bitmap
+        if (!result.isRecycled()) {
+            result.recycle();
+        }
+        return isSuccess;
+    }
+
+
+    /**
+     * 通过JNI图片压缩并把Bitmap保存到指定目录，如果原图小于maxSize(kb)，则返回false
+     * 注意项，如果原图小于maxSize，不会走压缩，也不会有文件输出
+     *
+     * 此方法是通过校验压缩结果的大小进行重新压缩，所以压缩耗时为  N(次)压缩时间之和
+     * 影响压缩时间的参数是  <maxSize的大小> 和 <quality的递减幅度>
+     *
+     * @param filePath 原文件路径
+     * @param outputPath 输出路径
+     * @param targetSize 压缩的目标大小最大值 (例如:300K),单位kb
+     */
+    public static boolean compressSize(Context context,String filePath, String outputPath,int targetSize) throws Exception{
+        boolean isSuccess = false;
+        //根据地址获取bitmap
+        Bitmap result = getBitmapFromFile(context,filePath);
+        int quality = 100;
+        int w = result.getWidth();
+        int h = result.getHeight();
+        long fileSize =  getFileSize(new File(filePath)) /1024;
+        while (fileSize > targetSize) {
+//            Log.e("compress","压缩中：quality:"+quality);
+            isSuccess = compressBitmap(result,w,h, outputPath,quality, true);
+            if(isSuccess){
+                fileSize = getFileSize(new File(outputPath))/1024;
+//                Log.e("compress","压缩中：newFileSize :"+fileSize);
+            }else{
+                break;
+            }
+            // 每次都减少10
+            quality -= 10;
+        }
+
+        // 释放Bitmap
+        if (!result.isRecycled()) {
+            result.recycle();
+        }
+
+        return isSuccess;
+    }
+
+
+    /**
+     *
+     * 获取图片压缩比率
+     * @param context
+     * @param bitWidth 图片宽度
+     * @param bitHeight 图片高度
+     * @return 图片压缩比率
+     */
+    public static int getRatioSize(Context context,int bitWidth, int bitHeight) {
+        // 图片最大分辨率
+        int imageHeight = getDeviceHeight(context,1280);
+        int imageWidth = getDeviceWidth(context,960);
+        // 缩放比
+        int ratio = 1;
+        // 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
+        if (bitWidth > bitHeight && bitWidth > imageWidth) {
+            // 如果图片宽度比高度大,以宽度为基准
+            ratio = bitWidth / imageWidth;
+        } else if (bitWidth < bitHeight && bitHeight > imageHeight) {
+            // 如果图片高度比宽度大，以高度为基准
+            ratio = bitHeight / imageHeight;
+        }
+        // 最小比率为1
+        if (ratio <= 0)
+            ratio = 1;
+        return ratio;
+    }
+
+    /**
+     * 通过文件路径读获取Bitmap防止OOM以及解决图片旋转问题
+     * @param filePath 文件路径
+     * @return 位图数据
+     */
+    public static Bitmap getBitmapFromFile(Context context,String filePath){
+        BitmapFactory.Options newOpts = new BitmapFactory.Options();
+        newOpts.inJustDecodeBounds = true;//只读边,不读内容
+        BitmapFactory.decodeFile(filePath, newOpts);
+        int w = newOpts.outWidth;
+        int h = newOpts.outHeight;
+        // 获取尺寸压缩倍数
+        newOpts.inSampleSize = getRatioSize(context,w,h);
+        newOpts.inJustDecodeBounds = false;//读取所有内容
+        newOpts.inDither = false;
+        newOpts.inPurgeable=true;
+        newOpts.inInputShareable=true;
+        newOpts.inTempStorage = new byte[1024*1024*5];//创建临时文件，将图片存储5M
+        Bitmap bitmap = null;
+        File file = new File(filePath);
+        FileInputStream fs = null;
+        try {
+            fs = new FileInputStream(file);
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+        }
+        try {
+            if(fs!=null){
+                bitmap = BitmapFactory.decodeFileDescriptor(fs.getFD(),null,newOpts);
+                //旋转图片
+                int photoDegree = readPictureDegree(filePath);
+                if(photoDegree != 0){
+                    Matrix matrix = new Matrix();
+                    matrix.postRotate(photoDegree);
+                    // 创建新的图片
+                    bitmap = Bitmap.createBitmap(bitmap, 0, 0,
+                            bitmap.getWidth(), bitmap.getHeight(), matrix, true);
+                }
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally{
+            if(fs!=null) {
+                try {
+                    fs.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+        return bitmap;
+    }
+
+    /**
+     *
+     * 读取图片属性：旋转的角度
+     * @param path 图片绝对路径
+     * @return degree旋转的角度
+     */
+
+    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;
+    }
+
+
+    /**
+     * 获取手机屏幕宽度
+     * @param context
+     * @param def 默认宽度
+     * @return 屏幕宽度
+     */
+    public static int getDeviceWidth(Context context,int def) {
+        int width = def;
+        WindowManager manager = (WindowManager) context
+                .getSystemService(Context.WINDOW_SERVICE);
+        if(manager != null ){
+            width = manager.getDefaultDisplay().getWidth();
+        }
+        if(width <= 0) width = def;
+        return width;
+    }
+
+
+    /**
+     * 获取手机屏幕高度
+     * @param context
+     * @param def 默认高度
+     * @return 屏幕高度
+     */
+    public static int getDeviceHeight(Context context,int def) {
+        int height = def;
+        WindowManager manager = (WindowManager) context
+                .getSystemService(Context.WINDOW_SERVICE);
+        if(manager != null ){
+            height = manager.getDefaultDisplay().getHeight();
+        }
+        if(height <= 0) height = def;
+        return height;
+    }
+
+
+    /**
+     * 获取指定文件大小
+     * @param file
+     * @return 文件大小，long类型，单位：b
+     * @throws Exception 　　
+     */
+    public static long getFileSize(File file) throws Exception {
+        long size = 0;
+        if (file.exists()) {
+            FileInputStream fis = null;
+            fis = new FileInputStream(file);
+            size = fis.available();
+        } else {
+            file.createNewFile();
+        }
+        return size;
+    }
+
+
+
+
 }
diff --git a/doc/allclasses-frame.html b/doc/allclasses-frame.html
@@ -0,0 +1,20 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<!-- NewPage -->
+<html lang="zh">
+<head>
+<!-- Generated by javadoc (1.8.0_05) on Thu May 31 15:45:57 CST 2018 -->
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>所有类</title>
+<meta name="date" content="2018-05-31">
+<link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
+<script type="text/javascript" src="script.js"></script>
+</head>
+<body>
+<h1 class="bar">所有类</h1>
+<div class="indexContainer">
+<ul>
+<li><a href="com/nowy/commonlib/JpegUtil.html" title="com.nowy.commonlib中的类" target="classFrame">JpegUtil</a></li>
+</ul>
+</div>
+</body>
+</html>
diff --git a/doc/allclasses-noframe.html b/doc/allclasses-noframe.html
@@ -0,0 +1,20 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<!-- NewPage -->
+<html lang="zh">
+<head>
+<!-- Generated by javadoc (1.8.0_05) on Thu May 31 15:45:57 CST 2018 -->
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>所有类</title>
+<meta name="date" content="2018-05-31">
+<link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
+<script type="text/javascript" src="script.js"></script>
+</head>
+<body>
+<h1 class="bar">所有类</h1>
+<div class="indexContainer">
+<ul>
+<li><a href="com/nowy/commonlib/JpegUtil.html" title="com.nowy.commonlib中的类">JpegUtil</a></li>
+</ul>
+</div>
+</body>
+</html>