学步园

/**
* 画一个圆角图
*
* @param bitmap
* @param roundPx
* @return
*/
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float roundPx) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242;
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(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}

/**
* 创建倒影效果
*
* @return
*/
public boolean createReflectedImages() {
// 倒影图和原图之间的距离
final int reflectionGap = 4;
int index = 0;
for (GalleryWith3DData imageId : mImageIds) {
// 返回原图解码之后的bitmap对象
Bitmap originalImage = BitmapFactory.decodeResource(
mContext.getResources(), imageId.getInteger());
int width = originalImage.getWidth();
int height = originalImage.getHeight();
// 创建矩阵对象
Matrix matrix = new Matrix();
// 指定矩阵(x轴不变，y轴相反)
matrix.preScale(1, -1);
// 将矩阵应用到该原图之中，返回一个宽度不变，高度为原图1/2的倒影位图
Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0,
height / 2, width, height / 2, matrix, false);
// 创建一个宽度不变，高度为原图+倒影图高度的位图
Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
(height + height / 2), Config.ARGB_8888);
// 将上面创建的位图初始化到画布
Canvas canvas = new Canvas(bitmapWithReflection);
canvas.drawBitmap(getRoundedCornerBitmap(originalImage, 20), 0, 0,
null);
int len = imageId.getstr().length();
double lenWeght = len * 50 * 0.9;
int ban = width / 2;
int ban1 = (int) (lenWeght / 2);
int hua = ban - ban1;
if (imageId.getFlagRecommend()) {
canvas.rotate(30);
canvas.drawText(mStrRecommend, hua - 20, 150,
createPaint(Color.RED));
canvas.rotate(-30);
}
Paint deafaultPaint = new Paint();
deafaultPaint.setAntiAlias(false);
canvas.drawBitmap(getRoundedCornerBitmap(reflectionImage, 20), 0,
height + reflectionGap, null);
Paint paint = new Paint();
paint.setAntiAlias(false);
/**
* 参数一:为渐变起初点坐标x位置， 参数二:为y轴位置， 参数三和四:分辨对应渐变终点， 最后参数为平铺方式，
* 这里设置为镜像Gradient是基于Shader类，所以我们通过Paint的setShader方法来设置这个渐变
*/
LinearGradient shader = new LinearGradient(0,
originalImage.getHeight(), 0,
bitmapWithReflection.getHeight() + reflectionGap,
0x70ffffff, 0x00ffffff, TileMode.MIRROR);
// 设置阴影
paint.setShader(shader);
paint.setXfermode(new PorterDuffXfermode(
android.graphics.PorterDuff.Mode.DST_IN));
// 用已经定义好的画笔构建一个矩形阴影渐变效果
canvas.drawRect(0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint);
canvas.drawText(imageId.getstr(), hua, 430,
createPaint(Color.WHITE));
// 创建一个ImageView用来显示已经画好的bitmapWithReflection
ImageView imageView = new ImageView(mContext);
imageView.setImageBitmap(bitmapWithReflection);
// 设置imageView大小 ，也就是最终显示的图片大小
imageView.setLayoutParams(new GalleryWith3D.LayoutParams(150, 250));
// imageView.setScaleType(ScaleType.MATRIX);
mImages[index++] = imageView;
}
return true;
}