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Bitmap工具类
Android BitmapUtils工具类
Android图片的处理工具类BitmapUtils（阅读量2675，2赞）
Android 中图可以用到的图片处理类 BitmapUtils（阅读量4762，1赞）
public final class BitmapUtils {    public static final String TAG = "BitmapUtil";    private static int sShotScreenWidth = 480;    private static int sShotScreenHeight = 720;    private static int sShotScreenSize = sShotScreenWidth * sShotScreenHeight;    @SuppressLint("StaticFieldLeak")    private static  Context mContext;    @SuppressLint("StaticFieldLeak")    private static Activity mActivity;    public void init(Context context,Activity ac) {        mContext=context;        mActivity=ac;        DisplayMetrics dm = new DisplayMetrics();        ac.getWindowManager().getDefaultDisplay().getMetrics(dm);        //获取屏幕分辨率        sShotScreenWidth = dm.widthPixels;        sShotScreenHeight = dm.heightPixels;        sShotScreenSize = sShotScreenWidth * sShotScreenHeight;    }    /**     * 图片合成     *      * @param bitmap 位图1     * @param mark 位图2     * @return Bitmap     */    public static Bitmap createBitmap(Bitmap bitmap, Bitmap mark) {        int w = bitmap.getWidth();        int h = bitmap.getHeight();        int mW = mark.getWidth();        int mH = mark.getHeight();        Bitmap newbitmap = Bitmap.createBitmap(w, h, Config.ARGB_8888);// 创建一个长宽一样的位图        Canvas cv = new Canvas(newbitmap);        cv.drawBitmap(bitmap, 0, 0, null);// 在 0，0坐标开始画入bitmap        cv.drawBitmap(mark, w - mW , h - mH , null);// 在右下角画入水印mark        cv.save(Canvas.ALL_SAVE_FLAG);// 保存        cv.restore();// 存储        return newbitmap;    }    /**     * 放大缩小图片     * @param bitmap 位图     * @param w 新的宽度     * @param h 新的高度     * @return Bitmap     */    public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) {        int width = bitmap.getWidth();        int height = bitmap.getHeight();        Matrix matrix = new Matrix();        float scaleWidht = ((float) w / width);        float scaleHeight = ((float) h / height);        matrix.postScale(scaleWidht, scaleHeight);        return Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);    }    /**     * 旋转图片     * @param bitmap 要旋转的图片     * @param angle 旋转角度     * @return bitmap     */    public static Bitmap rotate(Bitmap bitmap,int angle) {        Matrix matrix = new Matrix();        matrix.postRotate(angle);        return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(),                bitmap.getHeight(), matrix, true);    }    /**     * 圆形图片     *@param source 位图     * @param strokeWidth 裁剪范围 0表示最大     * @param bl 是否需要描边     * @param bl 画笔粗细     * @param bl 颜色代码     *  @return bitmap     */    public static Bitmap createCircleBitmap(Bitmap source, int strokeWidth, boolean bl,int edge,int color) {        int diameter = source.getWidth() < source.getHeight() ? source.getWidth() : source.getHeight();        Bitmap target = Bitmap.createBitmap(diameter, diameter, Config.ARGB_8888);        Canvas canvas = new Canvas(target);//创建画布        Paint paint = new Paint();        paint.setAntiAlias(true);        canvas.drawCircle(diameter / 2, diameter / 2, diameter / 2, paint);//绘制圆形        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));//取相交裁剪        canvas.drawBitmap(source, strokeWidth, strokeWidth, paint);        if(bl) {            if (color == 0) color = 0xFFFEA248;//默认橘黄色            paint.setColor(color);            paint.setStyle(Paint.Style.STROKE);//描边            paint.setStrokeWidth(edge);            canvas.drawCircle(diameter / 2, diameter / 2, diameter / 2, paint);        }        return target;    }    /**     * 圆角图片     * @param bitmap 位图     * @param rx x方向上的圆角半径     * @param ry y方向上的圆角半径     * @param bl 是否需要描边     * @param bl 画笔粗细     * @param bl 颜色代码     * @return bitmap     */    public static Bitmap createCornerBitmap(Bitmap bitmap,int rx,int ry,boolean bl,int edge,int color) {        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);        Canvas canvas = new Canvas(output);//创建画布        Paint paint = new Paint();        paint.setAntiAlias(true);        Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());        RectF rectF = new RectF(rect);        canvas.drawRoundRect(rectF, rx, ry, paint);//绘制圆角矩形        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));//取相交裁剪        canvas.drawBitmap(bitmap, rect, rect, paint);        if(bl) {            if (color == 0) color = 0xFFFEA248;//默认橘黄色            paint.setColor(color);            paint.setColor(color);            paint.setStyle(Paint.Style.STROKE);//描边            paint.setStrokeWidth(edge);            canvas.drawRoundRect(rectF, rx, ry, paint);        }        return output;    }    /**     *  按比例裁剪图片     *  @param bitmap 位图     *  @param wScale 裁剪宽 0~100%     *  @param hScale 裁剪高 0~100%      * @return bitmap     */    public static Bitmap cropBitmap(Bitmap bitmap, float wScale, float hScale) {        int w = bitmap.getWidth();        int h = bitmap.getHeight();        int wh = (int) (w * wScale);        int hw = (int) (h * hScale);        int retX = (int) (w * (1 - wScale) / 2);        int retY = (int) (h * (1 - hScale) / 2);        return Bitmap.createBitmap(bitmap, retX, retY, wh, hw, null, false);    }    /**     * 获得带倒影的图片方法     * @param bitmap 位图     * @param region 倒影区域 0.1~1     * @return bitmap     */    public static Bitmap createReflectionBitmap(Bitmap bitmap,float region) {        int width = bitmap.getWidth();        int height = bitmap.getHeight();        Matrix matrix = new Matrix();        matrix.preScale(1, -1);//镜像缩放        Bitmap reflectionBitmap = Bitmap.createBitmap(                                                  bitmap,0                                                , (int)(height*(1-region))//从哪个点开始绘制                                                , width                                                ,(int) (height*region)//绘制多高                                                , matrix, false);        Bitmap reflectionWithBitmap = Bitmap.createBitmap(width,height+ (int) (height*region),                                                            Config.ARGB_8888);        Canvas canvas = new Canvas(reflectionWithBitmap);        canvas.drawBitmap(bitmap, 0, 0, null);        canvas.drawBitmap(reflectionBitmap, 0, height , null);        LinearGradient shader = new LinearGradient(0, bitmap.getHeight(), 0,                                                reflectionWithBitmap.getHeight()                                                , 0x70ffffff, 0x00ffffff, TileMode.CLAMP);        Paint paint = new Paint();        paint.setShader(shader);        paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));//取两层绘制交集。显示下层。        canvas.drawRect(0, height, width, reflectionWithBitmap.getHeight() , paint);        return reflectionWithBitmap;    }    /**     * 图片质量压缩     * @param bitmap     * @param many 百分比     * @return     */    public static Bitmap compressBitmap(Bitmap bitmap, float many){        ByteArrayOutputStream baos = new ByteArrayOutputStream();        bitmap.compress(Bitmap.CompressFormat.JPEG, (int)many*100, baos);        ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());        return BitmapFactory.decodeStream(isBm, null, null);    }    /**     * 高级图片质量压缩     *@param bitmap 位图     * @param maxSize 压缩后的大小，单位kb     */    public static Bitmap imageZoom(Bitmap bitmap, double maxSize) {        // 将bitmap放至数组中，意在获得bitmap的大小（与实际读取的原文件要大）        ByteArrayOutputStream baos = new ByteArrayOutputStream();        // 格式、质量、输出流        bitmap.compress(Bitmap.CompressFormat.PNG, 70, baos);        byte[] b = baos.toByteArray();        // 将字节换成KB        double mid = b.length / 1024;        // 获取bitmap大小 是允许最大大小的多少倍        double i = mid / maxSize;        // 判断bitmap占用空间是否大于允许最大空间 如果大于则压缩 小于则不压缩        doRecycledIfNot(bitmap);        if (i > 1) {            // 缩放图片 此处用到平方根 将宽带和高度压缩掉对应的平方根倍            // （保持宽高不变，缩放后也达到了最大占用空间的大小）            return scaleWithWH(bitmap,bitmap.getWidth() / Math.sqrt(i),                            bitmap.getHeight() / Math.sqrt(i));        }        return null;    }    /***     * 图片缩放     *@param bitmap 位图     * @param w 新的宽度     * @param h 新的高度     * @return Bitmap     */    public static Bitmap scaleWithWH(Bitmap bitmap, double w, double h) {        if (w == 0 || h == 0 || bitmap == null) {            return bitmap;        } else {            int width = bitmap.getWidth();            int height = bitmap.getHeight();            Matrix matrix = new Matrix();            float scaleWidth = (float) (w / width);            float scaleHeight = (float) (h / height);                        matrix.postScale(scaleWidth, scaleHeight);            return Bitmap.createBitmap(bitmap, 0, 0, width, height,                    matrix, true);        }    }    /**     * YUV视频流格式转bitmap     * @param data YUV视频流格式     * @return width 设置宽度     * @return width 设置高度     */    public static Bitmap getBitmap(byte[] data, int width, int height) {        Bitmap bitmap;        YuvImage yuvimage = new YuvImage(data, ImageFormat.NV21, width, height, null);        //data是onPreviewFrame参数提供        ByteArrayOutputStream baos = new ByteArrayOutputStream();        yuvimage.compressToJpeg(new Rect(0, 0, yuvimage.getWidth(), yuvimage.getHeight()), 100, baos);//        // 80--JPG图片的质量[0-100],100最高        byte[] rawImage = baos.toByteArray();        BitmapFactory.Options options = new BitmapFactory.Options();        SoftReference softRef = new SoftReference(BitmapFactory.decodeByteArray(rawImage, 0, rawImage                .length, options));        bitmap = softRef.get();        return bitmap;    }    /**     * 图片资源文件转bitmap     * @param file 图片的绝对路径     * @return bitmap     */    public static Bitmap getBitmapResources(Context context,int resId){         return BitmapFactory.decodeResource(context.getResources(),resId);   }   /**     * 将图片路径转Bitmap     * @Param path 图片路径     * @return Bitmap     */    public static Bitmap getBitmapPath(String path){        return BitmapFactory.decodeFile(path);    }    /**     * bitmap保存到指定路径     * @param file 图片的绝对路径     * @param file 位图     * @return bitmap     */    public static  boolean saveFile(String file, Bitmap bmp) {        if(TextUtils.isEmpty(file) || bmp == null) return false;                File f = new File(file);        if (f.exists()) {            f.delete();        }else {            File p = f.getParentFile();            if(!p.exists()) {                p.mkdirs();            }        }        try {            FileOutputStream out = new FileOutputStream(f);            bmp.compress(Bitmap.CompressFormat.JPEG, 100, out);            out.flush();            out.close();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();            return false;        }        return true;    }    /**     * 回收一个未被回收的Bitmap     *@param bitmap     */    public static void doRecycledIfNot(Bitmap bitmap) {        if (!bitmap.isRecycled()) {            bitmap.recycle();        }    }/**     * 将图片转换成Base64编码的字符串     */    public static String imageToBase64(String path){        if(TextUtils.isEmpty(path)){            return null;        }        InputStream is = null;        byte[] data = null;        String result = null;        try{            is = new FileInputStream(path);            //创建一个字符流大小的数组。            data = new byte[is.available()];            //写入数组            is.read(data);            //用默认的编码格式进行编码            result = Base64.encodeToString(data,Base64.DEFAULT);        }catch (Exception e){            e.printStackTrace();        }finally {            if(null !=is){                try {                    is.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }        return result;    }}
Android(安卓)BitmapUtils工具类

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