import javaioByteArrayInputStream; 
import javaioByteArrayOutputStream; 
import javaioFile; 
import javaioFileNotFoundException; 
import javaioFileOutputStream; 
import javaioIOException; 
 
import androidgraphicsBitmap; 
import androidgraphicsBitmapConfig; 
import androidgraphicsBitmapFactory; 
 
/** 
 * Image compress factory class 
 * 
 * @author 
 * 
 */ 
public class ImageFactory { 
 
  /** 
   * Get bitmap from specified image path 
   * 
   * @param imgPath 
   * @return 
   */ 
  public Bitmap getBitmap(String imgPath) { 
    // Get bitmap through image path 
    BitmapFactoryOptions newOpts = new BitmapFactoryOptions(); 
    newOptsinJustDecodeBounds = false; 
    newOptsinPurgeable = true; 
    newOptsinInputShareable = true; 
    // Do not compress 
    newOptsinSampleSize = 1; 
    newOptsinPreferredConfig = ConfigRGB_565; 
    return BitmapFactorydecodeFile(imgPath, newOpts); 
  } 
   
  /** 
   * Store bitmap into specified image path 
   * 
   * @param bitmap 
   * @param outPath 
   * @throws FileNotFoundException 
   */ 
  public void storeImage(Bitmap bitmap, String outPath) throws FileNotFoundException { 
    FileOutputStream os = new FileOutputStream(outPath); 
    bitmapcompress(BitmapCompressFormatJPEG, 100, os); 
  } 
   
  /** 
   * Compress image by pixel, this will modify image width/height 
   * Used to get thumbnail 
   * 
   * @param imgPath image path 
   * @param pixelW target pixel of width 
   * @param pixelH target pixel of height 
   * @return 
   */ 
  public Bitmap ratio(String imgPath, float pixelW, float pixelH) { 
    BitmapFactoryOptions newOpts = new BitmapFactoryOptions();  
    // 开始读入图片，此时把optionsinJustDecodeBounds 设回true，即只读边不读内容 
    newOptsinJustDecodeBounds = true; 
    newOptsinPreferredConfig = ConfigRGB_565; 
    // Get bitmap info, but notice that bitmap is null now  
    Bitmap bitmap = BitmapFactorydecodeFile(imgPath,newOpts); 
      
    newOptsinJustDecodeBounds = false;  
    int w = newOptsoutWidth;  
    int h = newOptsoutHeight;  
    // 想要缩放的目标尺寸 
    float hh = pixelH;// 设置高度为240f时，可以明显看到图片缩小了 
    float ww = pixelW;// 设置宽度为120f，可以明显看到图片缩小了 
    // 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) (newOptsoutWidth / 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) (newOptsoutHeight / hh);  
    }  
    if (be <= 0) be = 1;  
    newOptsinSampleSize = be;//设置缩放比例 
    // 开始压缩图片，注意此时已经把optionsinJustDecodeBounds 设回false了 
    bitmap = BitmapFactorydecodeFile(imgPath, newOpts); 
    // 压缩好比例大小后再进行质量压缩 
//    return compress(bitmap, maxSize); // 这里再进行质量压缩的意义不大，反而耗资源，删除 
    return bitmap; 
  } 
   
  /** 
   * Compress image by size, this will modify image width/height 
   * Used to get thumbnail 
   * 
   * @param image 
   * @param pixelW target pixel of width 
   * @param pixelH target pixel of height 
   * @return 
   */ 
  public Bitmap ratio(Bitmap image, float pixelW, float pixelH) { 
    ByteArrayOutputStream os = new ByteArrayOutputStream(); 
    imagecompress(BitmapCompressFormatJPEG, 100, os); 
    if( ostoByteArray()length / 1024>1024) {//判断如果图片大于1M,进行压缩避免在生成图片（BitmapFactorydecodeStream）时溢出   
      osreset();//重置baos即清空baos  
      imagecompress(BitmapCompressFormatJPEG, 50, os);//这里压缩50%，把压缩后的数据存放到baos中  
    }  
    ByteArrayInputStream is = new ByteArrayInputStream(ostoByteArray());  
    BitmapFactoryOptions newOpts = new BitmapFactoryOptions();  
    //开始读入图片，此时把optionsinJustDecodeBounds 设回true了  
    newOptsinJustDecodeBounds = true; 
    newOptsinPreferredConfig = ConfigRGB_565; 
    Bitmap bitmap = BitmapFactorydecodeStream(is, null, newOpts);  
    newOptsinJustDecodeBounds = false;  
    int w = newOptsoutWidth;  
    int h = newOptsoutHeight;  
    float hh = pixelH;// 设置高度为240f时，可以明显看到图片缩小了 
    float ww = pixelW;// 设置宽度为120f，可以明显看到图片缩小了 
    //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) (newOptsoutWidth / 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) (newOptsoutHeight / hh);  
    }  
    if (be <= 0) be = 1;  
    newOptsinSampleSize = be;//设置缩放比例  
    //重新读入图片，注意此时已经把optionsinJustDecodeBounds 设回false了  
    is = new ByteArrayInputStream(ostoByteArray());  
    bitmap = BitmapFactorydecodeStream(is, null, newOpts); 
    //压缩好比例大小后再进行质量压缩 
//   return compress(bitmap, maxSize); // 这里再进行质量压缩的意义不大，反而耗资源，删除 
    return bitmap; 
  } 
   
  /** 
   * Compress by quality, and generate image to the path specified 
   * 
   * @param image 
   * @param outPath 
   * @param maxSize target will be compressed to be smaller than this size(kb) 
   * @throws IOException 
   */ 
  public void compressAndGenImage(Bitmap image, String outPath, int maxSize) throws IOException { 
    ByteArrayOutputStream os = new ByteArrayOutputStream(); 
    // scale 
    int options = 100; 
    // Store the bitmap into output stream(no compress) 
    imagecompress(BitmapCompressFormatJPEG, options, os);  
    // Compress by loop 
    while ( ostoByteArray()length / 1024 > maxSize) { 
      // Clean up os 
      osreset(); 
      // interval 10 
      options -= 10; 
      imagecompress(BitmapCompressFormatJPEG, options, os); 
    } 
     
    // Generate compressed image file 
    FileOutputStream fos = new FileOutputStream(outPath);  
    foswrite(ostoByteArray());  
    fosflush();  
    fosclose();  
  } 
   
  /** 
   * Compress by quality, and generate image to the path specified 
   * 
   * @param imgPath 
   * @param outPath 
   * @param maxSize target will be compressed to be smaller than this size(kb) 
   * @param needsDelete Whether delete original file after compress 
   * @throws IOException 
   */ 
  public void compressAndGenImage(String imgPath, String outPath, int maxSize, boolean needsDelete) throws IOException { 
    compressAndGenImage(getBitmap(imgPath), outPath, maxSize); 
     
    // Delete original file 
    if (needsDelete) { 
      File file = new File (imgPath); 
      if (fileexists()) { 
        filedelete(); 
      } 
    } 
  } 
   
  /** 
   * Ratio and generate thumb to the path specified 
   * 
   * @param image 
   * @param outPath 
   * @param pixelW target pixel of width 
   * @param pixelH target pixel of height 
   * @throws FileNotFoundException 
   */ 
  public void ratioAndGenThumb(Bitmap image, String outPath, float pixelW, float pixelH) throws FileNotFoundException { 
    Bitmap bitmap = ratio(image, pixelW, pixelH); 
    storeImage( bitmap, outPath); 
  } 
   
  /** 
   * Ratio and generate thumb to the path specified 
   * 
   * @param image 
   * @param outPath 
   * @param pixelW target pixel of width 
   * @param pixelH target pixel of height 
   * @param needsDelete Whether delete original file after compress 
   * @throws FileNotFoundException 
   */ 
  public void ratioAndGenThumb(String imgPath, String outPath, float pixelW, float pixelH, boolean needsDelete) throws FileNotFoundException { 
    Bitmap bitmap = ratio(imgPath, pixelW, pixelH); 
    storeImage( bitmap, outPath); 
     
    // Delete original file 
        if (needsDelete) { 
          File file = new File (imgPath); 
          if (fileexists()) { 
            filedelete(); 
          } 
        } 
  } 
   
} 

public static void compressBmpToFile(Bitmap bmp,File file){ 
    ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
    int options = 80;//个人喜欢从80开始, 
    bmp.compress(Bitmap.CompressFormat.JPEG, options, baos); 
    while (baos.toByteArray().length / 1024 > 100) {  
      baos.reset(); 
      options -= 10; 
      bmp.compress(Bitmap.CompressFormat.JPEG, options, baos); 
    } 
    try { 
      FileOutputStream fos = new FileOutputStream(file); 
      fos.write(baos.toByteArray()); 
      fos.flush(); 
      fos.close(); 
    } catch (Exception e) { 
      e.printStackTrace(); 
    } 
  } 

private Bitmap compressBmpFromBmp(Bitmap image) { 
    ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
    int options = 100; 
    image.compress(Bitmap.CompressFormat.JPEG, 100, baos); 
    while (baos.toByteArray().length / 1024 > 100) {  
      baos.reset(); 
      options -= 10; 
      image.compress(Bitmap.CompressFormat.JPEG, options, baos); 
    } 
    ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray()); 
    Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null); 
    return bitmap; 
  } 

  private Bitmap compressImageFromFile(String srcPath) { 
    BitmapFactory.Options newOpts = new BitmapFactory.Options(); 
    newOpts.inJustDecodeBounds = true;//只读边,不读内容 
    Bitmap bitmap = BitmapFactory.decodeFile(srcPath, newOpts); 
 
    newOpts.inJustDecodeBounds = false; 
    int w = newOpts.outWidth; 
    int h = newOpts.outHeight; 
    float hh = 800f;// 
    float ww = 480f;// 
    int be = 1; 
    if (w > h && w > ww) { 
      be = (int) (newOpts.outWidth / ww); 
    } else if (w < h && h > hh) { 
      be = (int) (newOpts.outHeight / hh); 
    } 
    if (be <= 0) 
      be = 1; 
    newOpts.inSampleSize = be;//设置采样率 
     
    newOpts.inPreferredConfig = Config.ARGB_8888;//该模式是默认的,可不设 
    newOpts.inPurgeable = true;// 同时设置才会有效 
    newOpts.inInputShareable = true;//。当系统内存不够时候图片自动被回收 
     
    bitmap = BitmapFactory.decodeFile(srcPath, newOpts); 
//   return compressBmpFromBmp(bitmap);//原来的方法调用了这个方法企图进行二次压缩 
                  //其实是无效的,大家尽管尝试 
    return bitmap; 
  } 

public static void compressPicture(String srcPath, String desPath) { 
    FileOutputStream fos = null; 
    BitmapFactoryOptions op = new BitmapFactoryOptions(); 
 
    // 开始读入图片，此时把optionsinJustDecodeBounds 设回true了 
    opinJustDecodeBounds = true; 
    Bitmap bitmap = BitmapFactorydecodeFile(srcPath, op); 
    opinJustDecodeBounds = false; 
 
    // 缩放图片的尺寸 
    float w = opoutWidth; 
    float h = opoutHeight; 
    float hh = 1024f;// 
    float ww = 1024f;// 
    // 最长宽度或高度1024 
    float be = 0f; 
    if (w > h && w > ww) { 
      be = (float) (w / ww); 
    } else if (w < h && h > hh) { 
      be = (float) (h / hh); 
    } 
    if (be <= 0) { 
      be = 0f; 
    } 
    opinSampleSize = (int) be;// 设置缩放比例,这个数字越大,图片大小越小 
    // 重新读入图片，注意此时已经把optionsinJustDecodeBounds 设回false了 
    bitmap = BitmapFactorydecodeFile(srcPath, op); 
    int desWidth = (int) (w / be); 
    int desHeight = (int) (h / be); 
    bitmap = BitmapcreateScaledBitmap(bitmap, desWidth, desHeight, true); 
    try { 
      fos = new FileOutputStream(desPath); 
      if (bitmap != null) { 
        bitmapcompress(BitmapCompressFormatJPEG, 100, fos); 
      } 
    } catch (FileNotFoundException e) { 
      eprintStackTrace(); 
    } 
  }