android 圖片倒影 bitmap與drawable的轉換 把圖片處理成指定大小 圖片圓角處理 dip轉換成px

//圖片倒影處理
public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap) {
			final int reflectionGap = 0;
			int width = bitmap.getWidth();
			int height = bitmap.getHeight();
			Matrix matrix = new Matrix();
			matrix.preScale(1, -1);
			Bitmap reflectionImage = Bitmap.createBitmap(bitmap, 0, height / 2, width, height / 2, matrix, false);
			Bitmap bitmapWithReflection = Bitmap.createBitmap(width, (height + height / 4), Config.ARGB_8888);
			Canvas canvas = new Canvas(bitmapWithReflection);
			canvas.drawBitmap(bitmap, 0, 0, null);
			Paint deafalutPaint = new Paint();
			canvas.drawRect(0, height, width, height + reflectionGap, deafalutPaint);
			canvas.drawBitmap(reflectionImage, 0, height + reflectionGap , null);
			Paint paint = new Paint();
			//創建線性漸變LinearGradient對象
			LinearGradient shader = new LinearGradient(0, bitmap.getHeight(), 0,
					bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff,0x00ffffff, TileMode.CLAMP);
			paint.setShader(shader);
			// Set the Transfer mode to be porter duff and destination in
			paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
			// Draw a rectangle using the paint with our linear gradient
			canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()+ reflectionGap, paint);
			return bitmapWithReflection;
		}

//drawable轉換成bitmap類型
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;
		}

//圖片縮放成指定的大小 csj start
    private static Bitmap zoomDrawable(Drawable drawable, int w, int h) {
        int width = drawable.getIntrinsicWidth();
        int height = drawable.getIntrinsicHeight();
        Bitmap oldbmp = drawableToBitmap(drawable);
        Matrix matrix = new Matrix();
        float scaleWidth = ((float) w / width);
        float scaleHeight = ((float) h / height);
        matrix.postScale(scaleWidth, scaleHeight);
        Bitmap newbmp = Bitmap.createBitmap(oldbmp, 0, 0, width, height,matrix, true);
        newbmp = getRCB(newbmp, 20f);
        return newbmp;
    }

//圖片圓角處理
	public static Bitmap getRCB(Bitmap bitmap, float roundPX) {
		Bitmap dstbmp = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
		Canvas canvas = new Canvas(dstbmp);
		final Paint paint = new Paint();
		final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
		final RectF rectF = new RectF(rect);
		paint.setAntiAlias(true);
		canvas.drawARGB(0, 0, 0, 0);
		paint.setColor(0xff424242);
		canvas.drawRoundRect(rectF, roundPX, roundPX, paint);
		paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
		canvas.drawBitmap(bitmap, rect, rect, paint);
		return dstbmp;
	}

//dip轉換成px
private int dip2px(Context context, float dipValue) {
		final float scale = context.getResources().getDisplayMetrics().density;
		return (int) (dipValue * scale + 0.5f);
	}