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/** * 图片转化工具 * @author chen.lin * */public class BitmapUtils {
       private static Map
   
    > imageCache = new HashMap
    
     >();    public static void addBitmapToCache(String path) {        // 强引用的Bitmap对象        Bitmap bitmap = BitmapFactory.decodeFile(path);        // 软引用的Bitmap对象        SoftReference
     
       softBitmap = new SoftReference
      
       (bitmap);        // 添加该对象到Map中使其缓存        imageCache.put(path, softBitmap);    }    public static Bitmap getBitmapByPath(String path) {        // 从缓存中取软引用的Bitmap对象        SoftReference
       
         softBitmap = imageCache.get(path);        // 判断是否存在软引用        if (softBitmap == null) {            return null;        }        // 取出Bitmap对象，如果由于内存不足Bitmap被回收，将取得空        Bitmap bitmap = softBitmap.get();        return bitmap;    }    /**     * @param drawable     * @return     */    public static Bitmap drawableToBitmap(Drawable drawable) {        Bitmap bitmap = Bitmap.createBitmap(        drawable.getIntrinsicWidth(),        drawable.getIntrinsicHeight(),        drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888        : Bitmap.Config.RGB_565);        Canvas canvas = new Canvas(bitmap);        // canvas.setBitmap(bitmap);        drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),                drawable.getIntrinsicHeight());        drawable.draw(canvas);        return bitmap;    }    public static String getBase64(byte[] image) {        String string = "";        try {            BASE64Encoder encoder = new BASE64Encoder();            string = encoder.encodeBuffer(image).trim();        } catch (Exception e) {            e.printStackTrace();        }        return string;    }    /**     * @param R_DRAWABLE_ID     * @return     */    @SuppressWarnings("deprecation")    public static Drawable getDrawable(byte[] imgByte) {        Bitmap bitmap;        if (imgByte != null) {            bitmap = BitmapFactory.decodeByteArray(imgByte, 0, imgByte.length);            Drawable drawable = new BitmapDrawable(bitmap);            return drawable;        }        return null;    }    /**     * 閫氳繃bitmap 鑾峰彇浜岃繘鍒舵暟鎹?     * @param image     * @return     */    public static byte[] getDefaultIcon(Bitmap image) {        // iconView.get        // BitmapFactory.        byte[] compressData = null;        if (image != null) {            compressData = getByteByBitmap(image);        }        return compressData;    }    private static byte[] getByteByBitmap(Bitmap bmp) {        Bitmap output = Bitmap.createScaledBitmap(bmp, 150, bmp.getHeight()                * 150 / bmp.getWidth(), true);        // 涓?畾瑕佸垽鏂紝濡傛灉鍥剧墖鍘嬬缉鍓嶅悗width,height涓嶅彉锛?        // 寮曠敤鍚屼竴涓璞★紝绯荤粺浼氭姤        // Canvas: trying to use a recycled bitmap android.graphics.Bitmap閿欒        if (bmp != output) {            bmp.recycle();            bmp = null;        }        byte[] compressData = null;        ByteArrayOutputStream baos = new ByteArrayOutputStream();        try {            try {                output.compress(Bitmap.CompressFormat.PNG, 100, baos);            } catch (Exception e) {                e.printStackTrace();            }            compressData = baos.toByteArray();            baos.close();        } catch (IOException e) {            e.printStackTrace();        }        return compressData;    }    /**     * @param bitmap     * @param _width     * @param _height     * @return     */    public static Bitmap setBitmapSize(Bitmap bitmap, int _width, int _height) {        int width = bitmap.getWidth();        int height = bitmap.getHeight();        int newWidth = _width;        int newHeight = _height;        float scaleWidth = ((float) newWidth) / width;        float scaleHeight = ((float) newHeight) / height;        Matrix matrix = new Matrix();        matrix.postScale(scaleWidth, scaleHeight);        return Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);    }    /**     * @param bitmap     * @param _width     * @param _height     * @return     */    public static Bitmap setBitmapSize(String bitmapPath, int _width,            int _height) {        Bitmap bitmap = BitmapFactory.decodeFile(bitmapPath);        if (bitmap == null) {            Logger.i("bitmap", "bitmap------------>发生未知异常！");            return null;        }        int width = bitmap.getWidth();        int height = bitmap.getHeight();        int newWidth = _width;        int newHeight = _height;        float scaleWidth = ((float) newWidth) / width;        float scaleHeight = ((float) newHeight) / height;        Matrix matrix = new Matrix();        matrix.postScale(scaleWidth, scaleHeight);        return Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);    }    /**     * @param bitmap     * @return     */    public static Bitmap setBitmapSize(String bitmapPath) {        Bitmap bitmap = BitmapFactory.decodeFile(bitmapPath);        if (bitmap == null) {            Logger.i("bitmap", "bitmap------------>发生未知异常！");            return null;        }        int width = bitmap.getWidth();        int height = bitmap.getHeight();        int newWidth = width;        int newHeight = height;        float scaleWidth = ((float) newWidth) / width;        float scaleHeight = ((float) newHeight) / height;        Matrix matrix = new Matrix();        matrix.postScale(scaleWidth, scaleHeight);        return Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);    }}
       
      
     
    
   

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