import java.io.BufferedOutputStream; 
import java.io.ByteArrayInputStream; 
import java.io.ByteArrayOutputStream; 
import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.InputStream; 
 
import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.BitmapFactory.Options; 
import android.graphics.Matrix; 
import android.net.Uri; 
import android.widget.Toast; 
 
/** 
 * 圓形圖片工具類 
 * 
 * @author SKLM 
 * 
 */ 
public class ImageViewTool { 
 
  /** 
   * 我們先看下質(zhì)量壓縮方法 
   * 
   * @param image 
   * @return 
   */ 
  public static Bitmap compressImage(Bitmap image) { 
 
    ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
    image.compress(Bitmap.CompressFormat.JPEG, 100, baos);// 質(zhì)量壓縮方法，這里100表示不壓縮，把壓縮后的數(shù)據(jù)存放到baos中 
    int options = 100; 
    while (baos.toByteArray().length / 1024 > 100) { // 循環(huán)判斷如果壓縮后圖片是否大于100kb,大于繼續(xù)壓縮 
      baos.reset();// 重置baos即清空baos 
      image.compress(Bitmap.CompressFormat.JPEG, options, baos);// 這里壓縮options%，把壓縮后的數(shù)據(jù)存放到baos中 
      options -= 10;// 每次都減少10 
    } 
    ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());// 把壓縮后的數(shù)據(jù)baos存放到ByteArrayInputStream中 
    Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);// 把ByteArrayInputStream數(shù)據(jù)生成圖片 
    return bitmap; 
  } 
 
  /** 
   * 圖片按比例大小壓縮方法（根據(jù)路徑獲取圖片并壓縮） 
   * 
   * @param srcPath 
   * @return 
   */ 
  public static Bitmap getimage(String srcPath) { 
    BitmapFactory.Options newOpts = new BitmapFactory.Options(); 
    // 開(kāi)始讀入圖片，此時(shí)把options.inJustDecodeBounds 設(shè)回true了 
    newOpts.inJustDecodeBounds = true; 
    Bitmap bitmap = BitmapFactory.decodeFile(srcPath, newOpts);// 此時(shí)返回bm為空 
 
    newOpts.inJustDecodeBounds = false; 
    int w = newOpts.outWidth; 
    int h = newOpts.outHeight; 
    // 現(xiàn)在主流手機(jī)比較多是800*480分辨率，所以高和寬我們?cè)O(shè)置為 
    float hh = 800f;// 這里設(shè)置高度為800f 
    float ww = 480f;// 這里設(shè)置寬度為480f 
    // 縮放比。由于是固定比例縮放，只用高或者寬其中一個(gè)數(shù)據(jù)進(jìn)行計(jì)算即可 
    int be = 1;// be=1表示不縮放 
    if (w > h && w > ww) {// 如果寬度大的話根據(jù)寬度固定大小縮放 
      be = (int) (newOpts.outWidth / ww); 
    } else if (w < h && h > hh) {// 如果高度高的話根據(jù)寬度固定大小縮放 
      be = (int) (newOpts.outHeight / hh); 
    } 
    if (be <= 0) 
      be = 1; 
    newOpts.inSampleSize = be;// 設(shè)置縮放比例 
    // 重新讀入圖片，注意此時(shí)已經(jīng)把options.inJustDecodeBounds 設(shè)回false了 
    bitmap = BitmapFactory.decodeFile(srcPath, newOpts); 
    return compressImage(bitmap);// 壓縮好比例大小后再進(jìn)行質(zhì)量壓縮 
  } 
 
  /** 
   * 圖片按比例大小壓縮方法（根據(jù)Bitmap圖片壓縮） 
   * 
   * @param image 
   * @return 
   */ 
  public static Bitmap comp(Bitmap image) { 
 
    ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
    image.compress(Bitmap.CompressFormat.JPEG, 100, baos); 
    if (baos.toByteArray().length / 1024 > 1024) {// 判斷如果圖片大于1M,進(jìn)行壓縮避免在生成圖片（BitmapFactory.decodeStream）時(shí)溢出 
      baos.reset();// 重置baos即清空baos 
      image.compress(Bitmap.CompressFormat.JPEG, 30, baos);// 這里壓縮50%，把壓縮后的數(shù)據(jù)存放到baos中 
    } 
    ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray()); 
    BitmapFactory.Options newOpts = new BitmapFactory.Options(); 
    // 開(kāi)始讀入圖片，此時(shí)把options.inJustDecodeBounds 設(shè)回true了 
    newOpts.inJustDecodeBounds = true; 
    Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, newOpts); 
    newOpts.inJustDecodeBounds = false; 
    int w = newOpts.outWidth; 
    int h = newOpts.outHeight; 
    // 現(xiàn)在主流手機(jī)比較多是800*480分辨率，所以高和寬我們?cè)O(shè)置為 
    float hh = 150f;// 這里設(shè)置高度為800f 
    float ww = 150f;// 這里設(shè)置寬度為480f 
    // 縮放比。由于是固定比例縮放，只用高或者寬其中一個(gè)數(shù)據(jù)進(jìn)行計(jì)算即可 
    int be = 1;// be=1表示不縮放 
    if (w > h && w > ww) {// 如果寬度大的話根據(jù)寬度固定大小縮放 
      be = (int) (newOpts.outWidth / ww); 
    } else if (w < h && h > hh) {// 如果高度高的話根據(jù)寬度固定大小縮放 
      be = (int) (newOpts.outHeight / hh); 
    } 
    if (be <= 0) 
      be = 1; 
    newOpts.inSampleSize = be;// 設(shè)置縮放比例 
    // 重新讀入圖片，注意此時(shí)已經(jīng)把options.inJustDecodeBounds 設(shè)回false了 
    isBm = new ByteArrayInputStream(baos.toByteArray()); 
    bitmap = BitmapFactory.decodeStream(isBm, null, newOpts); 
    return compressImage(bitmap);// 壓縮好比例大小后再進(jìn)行質(zhì)量壓縮 
  } 
 
  public static byte[] Bitmap2Bytes(Bitmap bm) { 
    ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
    bm.compress(Bitmap.CompressFormat.PNG, 100, baos); 
    return baos.toByteArray(); 
  } 
 
  /** 
   * 按原比例壓縮圖片到指定尺寸 
   * 
   * @param context 
   * @param inputUri 
   * @param outputUri 
   * @param maxLenth 
   *      最長(zhǎng)邊長(zhǎng) 
   */ 
  public static void reducePicture(Context context, Uri inputUri, 
      Uri outputUri, int maxLenth, int compress) { 
    Options options = new Options(); 
    options.inJustDecodeBounds = true; 
    InputStream is = null; 
    try { 
      is = context.getContentResolver().openInputStream(inputUri); 
      BitmapFactory.decodeStream(is, null, options); 
      is.close(); 
      int sampleSize = 1; 
      int longestSide = 0; 
      int longestSideLenth = 0; 
      if (options.outWidth > options.outHeight) { 
        longestSideLenth = options.outWidth; 
        longestSide = 0; 
      } else { 
        longestSideLenth = options.outHeight; 
        longestSide = 1; 
      } 
      if (longestSideLenth > maxLenth) { 
        sampleSize = longestSideLenth / maxLenth; 
      } 
      options.inJustDecodeBounds = false; 
      options.inSampleSize = sampleSize; 
 
      is = context.getContentResolver().openInputStream(inputUri); 
      Bitmap bitmap = BitmapFactory.decodeStream(is, null, options); 
      is.close(); 
 
      if (bitmap == null) { 
        Toast.makeText(context, "圖片獲取失敗，請(qǐng)確認(rèn)您的存儲(chǔ)卡是否正常", 
            Toast.LENGTH_SHORT).show(); 
        return; 
      } 
 
      Bitmap srcBitmap = bitmap; 
      float scale = 0; 
      if (longestSide == 0) { 
        scale = (float) maxLenth / (float) (srcBitmap.getWidth()); 
      } else { 
        scale = (float) maxLenth / (float) (srcBitmap.getHeight()); 
      } 
      Matrix matrix = new Matrix(); 
      matrix.postScale(scale, scale); 
      bitmap = Bitmap.createBitmap(srcBitmap, 0, 0, srcBitmap.getWidth(), 
          srcBitmap.getHeight(), matrix, true); 
      // 如果尺寸不變會(huì)返回本身，所以需要判斷是否是統(tǒng)一引用來(lái)確定是否需要回收 
      if (srcBitmap != bitmap) { 
        srcBitmap.recycle(); 
        srcBitmap = null; 
      } 
 
      saveBitmapToUri(bitmap, outputUri, compress); 
      bitmap.recycle(); 
      bitmap = null; 
    } catch (FileNotFoundException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
    } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
    } 
  } 
 
  private static boolean saveBitmapToUri(Bitmap bitmap, Uri uri, int compress) 
      throws IOException { 
    File file = new File(uri.getPath()); 
    if (file.exists()) { 
      if (file.delete()) { 
        if (!file.createNewFile()) { 
          return false; 
        } 
      } 
    } 
 
    BufferedOutputStream outStream = new BufferedOutputStream( 
        new FileOutputStream(file)); 
    bitmap.compress(Bitmap.CompressFormat.JPEG, compress, outStream); 
    outStream.flush(); 
    outStream.close(); 
 
    return true; 
  } 
 
} 

import java.io.ByteArrayInputStream; 
import java.io.ByteArrayOutputStream; 
import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.sql.Date; 
import java.text.SimpleDateFormat; 
 
import android.graphics.Bitmap; 
import android.graphics.Bitmap.Config; 
import android.graphics.BitmapFactory; 
import android.os.Environment; 
 
/** 
 * 圖像壓縮工廠類 
 * 
 * @author 
 * 
 */ 
public class ImageFactory { 
 
  /** 
   * 從指定的圖像路徑獲取位圖 
   * 
   * @param imgPath 
   * @return 
   */ 
  public Bitmap getBitmap(String imgPath) { 
    // Get bitmap through image path 
    BitmapFactory.Options newOpts = new BitmapFactory.Options(); 
    newOpts.inJustDecodeBounds = false; 
    newOpts.inPurgeable = true; 
    newOpts.inInputShareable = true; 
    // Do not compress 
    newOpts.inSampleSize = 1; 
    newOpts.inPreferredConfig = Config.RGB_565; 
    return BitmapFactory.decodeFile(imgPath, newOpts); 
  } 
 
  /** 
   * 壓縮圖片（質(zhì)量壓縮） 
   * 
   * @param bitmap 
   */ 
  public static File compressImage(Bitmap bitmap) { 
    ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);// 質(zhì)量壓縮方法，這里100表示不壓縮，把壓縮后的數(shù)據(jù)存放到baos中 
    int options = 100; 
    while (baos.toByteArray().length / 1024 > 500) { // 循環(huán)判斷如果壓縮后圖片是否大于500kb,大于繼續(xù)壓縮 
      baos.reset();// 重置baos即清空baos 
      options -= 10;// 每次都減少10 
      bitmap.compress(Bitmap.CompressFormat.JPEG, options, baos);// 這里壓縮options%，把壓縮后的數(shù)據(jù)存放到baos中 
      long length = baos.toByteArray().length; 
    } 
    SimpleDateFormat format = new SimpleDateFormat("yyyyMMddHHmmss"); 
    Date date = new Date(System.currentTimeMillis()); 
    String filename = format.format(date); 
    File file = new File(Environment.getExternalStorageDirectory(), filename + ".png"); 
    try { 
      FileOutputStream fos = new FileOutputStream(file); 
      try { 
        fos.write(baos.toByteArray()); 
        fos.flush(); 
        fos.close(); 
      } catch (IOException e) { 
 
        e.printStackTrace(); 
      } 
    } catch (FileNotFoundException e) { 
 
      e.printStackTrace(); 
    } 
    recycleBitmap(bitmap); 
    return file; 
  } 
 
  public static void recycleBitmap(Bitmap... bitmaps) { 
    if (bitmaps == null) { 
      return; 
    } 
    for (Bitmap bm : bitmaps) { 
      if (null != bm && !bm.isRecycled()) { 
        bm.recycle(); 
      } 
    } 
  } 
 
  /** 
   * 將位圖存儲(chǔ)到指定的圖像路徑中 
   * 
   * @param bitmap 
   * @param outPath 
   * @throws FileNotFoundException 
   */ 
  public void storeImage(Bitmap bitmap, String outPath) throws FileNotFoundException { 
    FileOutputStream os = new FileOutputStream(outPath); 
    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, os); 
  } 
 
  /** 
   * 通過(guò)像素壓縮圖像，這將改變圖像的寬度/高度。用于獲取縮略圖 
   * 
   * 
   * @param imgPath 
   *      image path 
   * @param pixelW 
   *      目標(biāo)寬度像素 
   * @param pixelH 
   *      高度目標(biāo)像素 
   * @return 
   */ 
  public Bitmap ratio(String imgPath, float pixelW, float pixelH) { 
    BitmapFactory.Options newOpts = new BitmapFactory.Options(); 
    // 開(kāi)始讀入圖片，此時(shí)把options.inJustDecodeBounds 設(shè)回true，即只讀邊不讀內(nèi)容 
    newOpts.inJustDecodeBounds = true; 
    newOpts.inPreferredConfig = Config.RGB_565; 
    // Get bitmap info, but notice that bitmap is null now 
    Bitmap bitmap = BitmapFactory.decodeFile(imgPath, newOpts); 
 
    newOpts.inJustDecodeBounds = false; 
    int w = newOpts.outWidth; 
    int h = newOpts.outHeight; 
    // 想要縮放的目標(biāo)尺寸 
    float hh = pixelH;// 設(shè)置高度為240f時(shí)，可以明顯看到圖片縮小了 
    float ww = pixelW;// 設(shè)置寬度為120f，可以明顯看到圖片縮小了 
    // 縮放比。由于是固定比例縮放，只用高或者寬其中一個(gè)數(shù)據(jù)進(jìn)行計(jì)算即可 
    int be = 1;// be=1表示不縮放 
    if (w > h && w > ww) {// 如果寬度大的話根據(jù)寬度固定大小縮放 
      be = (int) (newOpts.outWidth / ww); 
    } else if (w < h && h > hh) {// 如果高度高的話根據(jù)寬度固定大小縮放 
      be = (int) (newOpts.outHeight / hh); 
    } 
    if (be <= 0) 
      be = 1; 
    newOpts.inSampleSize = be;// 設(shè)置縮放比例 
    // 開(kāi)始?jí)嚎s圖片，注意此時(shí)已經(jīng)把options.inJustDecodeBounds 設(shè)回false了 
    bitmap = BitmapFactory.decodeFile(imgPath, newOpts); 
    // 壓縮好比例大小后再進(jìn)行質(zhì)量壓縮 
    // return compress(bitmap, maxSize); // 這里再進(jìn)行質(zhì)量壓縮的意義不大，反而耗資源，刪除 
    return bitmap; 
  } 
 
  /** 
   * 壓縮圖像的大小，這將修改圖像寬度/高度。用于獲取縮略圖 
   * 
   * 
   * @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(); 
    image.compress(Bitmap.CompressFormat.JPEG, 100, os); 
    if (os.toByteArray().length / 1024 > 1024) {// 判斷如果圖片大于1M,進(jìn)行壓縮避免在生成圖片（BitmapFactory.decodeStream）時(shí)溢出 
      os.reset();// 重置baos即清空baos 
      image.compress(Bitmap.CompressFormat.JPEG, 50, os);// 這里壓縮50%，把壓縮后的數(shù)據(jù)存放到baos中 
    } 
    ByteArrayInputStream is = new ByteArrayInputStream(os.toByteArray()); 
    BitmapFactory.Options newOpts = new BitmapFactory.Options(); 
    // 開(kāi)始讀入圖片，此時(shí)把options.inJustDecodeBounds 設(shè)回true了 
    newOpts.inJustDecodeBounds = true; 
    newOpts.inPreferredConfig = Config.RGB_565; 
    Bitmap bitmap = BitmapFactory.decodeStream(is, null, newOpts); 
    newOpts.inJustDecodeBounds = false; 
    int w = newOpts.outWidth; 
    int h = newOpts.outHeight; 
    float hh = pixelH;// 設(shè)置高度為240f時(shí)，可以明顯看到圖片縮小了 
    float ww = pixelW;// 設(shè)置寬度為120f，可以明顯看到圖片縮小了 
    // 縮放比。由于是固定比例縮放，只用高或者寬其中一個(gè)數(shù)據(jù)進(jìn)行計(jì)算即可 
    int be = 1;// be=1表示不縮放 
    if (w > h && w > ww) {// 如果寬度大的話根據(jù)寬度固定大小縮放 
      be = (int) (newOpts.outWidth / ww); 
    } else if (w < h && h > hh) {// 如果高度高的話根據(jù)寬度固定大小縮放 
      be = (int) (newOpts.outHeight / hh); 
    } 
    if (be <= 0) 
      be = 1; 
    newOpts.inSampleSize = be;// 設(shè)置縮放比例 
    // 重新讀入圖片，注意此時(shí)已經(jīng)把options.inJustDecodeBounds 設(shè)回false了 
    is = new ByteArrayInputStream(os.toByteArray()); 
    bitmap = BitmapFactory.decodeStream(is, null, newOpts); 
    // 壓縮好比例大小后再進(jìn)行質(zhì)量壓縮 
    // return compress(bitmap, maxSize); // 這里再進(jìn)行質(zhì)量壓縮的意義不大，反而耗資源，刪除 
    return bitmap; 
  } 
 
  /** 
   * 按質(zhì)量壓縮，并將圖像生成指定的路徑 
   * 
   * @param image 
   * @param outPath 
   * @param maxSize 
   *      目標(biāo)將被壓縮到小于這個(gè)大?。↘B）。 
   * @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) 
    image.compress(Bitmap.CompressFormat.JPEG, options, os); 
    // Compress by loop 
    while (os.toByteArray().length / 1024 > maxSize) { 
      // Clean up os 
      os.reset(); 
      // interval 10 
      options -= 10; 
      image.compress(Bitmap.CompressFormat.JPEG, options, os); 
    } 
 
    // Generate compressed image file 
    FileOutputStream fos = new FileOutputStream(outPath); 
    fos.write(os.toByteArray()); 
    fos.flush(); 
    fos.close(); 
  } 
 
  /** 
   * 按質(zhì)量壓縮，并將圖像生成指定的路徑 
   * 
   * @param imgPath 
   * @param outPath 
   * @param maxSize 
   *      目標(biāo)將被壓縮到小于這個(gè)大?。↘B）。 
   * @param needsDelete 
   *      是否壓縮后刪除原始文件 
   * @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 (file.exists()) { 
        file.delete(); 
      } 
    } 
  } 
 
  /** 
   * 比例和生成拇指的路徑指定 
   * 
   * @param image 
   * @param outPath 
   * @param pixelW 
   *      目標(biāo)寬度像素 
   * @param pixelH 
   *      高度目標(biāo)像素 
   * @throws FileNotFoundException 
   */ 
  public void ratioAndGenThumb(Bitmap image, String outPath, float pixelW, float pixelH) 
      throws FileNotFoundException { 
    Bitmap bitmap = ratio(image, pixelW, pixelH); 
    storeImage(bitmap, outPath); 
  } 
 
  /** 
   * 比例和生成拇指的路徑指定 
   * 
   * @param image 
   * @param outPath 
   * @param pixelW 
   *      目標(biāo)寬度像素 
   * @param pixelH 
   *      高度目標(biāo)像素 
   * @param needsDelete 
   *      是否壓縮后刪除原始文件 
   * @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 (file.exists()) { 
        file.delete(); 
      } 
    } 
  } 
 
}