import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.BitmapFactory.Options;import android.util.DisplayMetrics;import android.view.ViewGroup.LayoutParams;import android.widget.ImageView;public class ImagesTool {  /**   * 根據(jù)ImageView的大小壓縮圖片   * @param path   * @param imageView   * @return   */  public static Bitmap decodeSampledBitmapFromPath(String path,ImageView imageView)  {    Options options = new Options();    options.inJustDecodeBounds=true;    BitmapFactory.decodeFile(path,options);    ImageSize imageSize=getImageViewSize(imageView); //獲取圖片大小，ImageSize是封裝著ImageView大小的類    //計(jì)算采樣率    options.inSampleSize=caculateInSampleSize(options,imageSize.width,imageSize.height);    options.inJustDecodeBounds=false;    Bitmap bitmap=BitmapFactory.decodeFile(path, options);    return bitmap;  }  //計(jì)算采樣率  public static int caculateInSampleSize(Options options,ImageView imageView)  {    ImageSize imageSize=getImageViewSize(imageView);    int inSampleSize=caculateInSampleSize(options, imageSize.width,imageSize.height);    return inSampleSize;  }  /**   * 根據(jù)具體的大小要求解析圖片   * @param path   * @param reqWidth   * @param reqHeight   * @return   */  public static Bitmap decodeSampledBitmapFromPath(String path,int reqWidth, int reqHeight)  {    Options options = new Options();    options.inJustDecodeBounds=true;    BitmapFactory.decodeFile(path,options);    //計(jì)算采樣率    options.inSampleSize=caculateInSampleSize(options,reqWidth,reqHeight);    options.inJustDecodeBounds=false;    Bitmap bitmap=BitmapFactory.decodeFile(path, options);    return bitmap;  }  //計(jì)算采樣率  private static int caculateInSampleSize(Options options, int reqWidth, int reqHeight)   {    int width=options.outWidth; //原始圖片寬    int height=options.outHeight; //原始圖片高    int inSampleSize=1; //采樣率    if(width>reqWidth || height>reqHeight) //原始的寬比目標(biāo)寬大，或者原始高比目標(biāo)高大    {      int widthRadio=Math.round(width *1.0f/reqWidth);      int heightRadio = Math.round(height * 1.0f / reqHeight);      inSampleSize = Math.max(widthRadio, heightRadio);    }    return inSampleSize;  }  //獲取ImageView的大小  protected static ImageSize getImageViewSize(ImageView imageView)   {    ImageSize imageSize = new ImageSize();    DisplayMetrics metrics = imageView.getContext().getResources().getDisplayMetrics();    LayoutParams lp = imageView.getLayoutParams();    int width = imageView.getWidth();    if (width <= 0) {      width = lp.width;    }    if (width <= 0) {      width = imageView.getMaxWidth();    }    if (width <= 0) {      width = metrics.widthPixels;    }    int height = imageView.getHeight();    if (height <= 0) {      height = lp.height;    }    if (height <= 0) {      height = imageView.getMaxHeight();    }    if (height <= 0) {      height = metrics.heightPixels;    }    imageSize.width = width;    imageSize.height = height;    return imageSize;  }  //ImageView大小的封裝類  private static class ImageSize  {    int width;    int height;  }}