1. 图片放缩
代码如下:
// zoom 放缩
public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
float scaleWidth = w / (float) width;
float scaleHeight = h / (float) height;
matrix.postScale(scaleWidth, scaleHeight);
Bitmap bitmap2 = Bitmap.createBitmap(bitmap, 0, 0, width, height,
matrix, true);
return bitmap2;
}
2. 获得圆角图片
代码如下:
// Round Corner Bitmap 获得圆角图片
public static Bitmap getRoundCornerBitmap(Bitmap bitmap, float roundPX ) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Bitmap bitmap2 = Bitmap.createBitmap(width, height, Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap2);
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, width, height);
final RectF rectF = new RectF(rect);
paint.setColor(color);
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
canvas.drawRoundRect(rectF, roundPX, roundPX, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return bitmap2;
}
3. 获得带倒影的图片
代码如下:
// Reflect Bitmap 获得带倒影的图片
public static Bitmap createReflectedBitmap(Bitmap bitmap) {
//倒影和图片本身的间距
final int reflectedGap = 4;
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
matrix.preScale(1, -1);
Bitmap reflectedImage = Bitmap.createBitmap(bitmap, 0, height / 2,
width, height / 2, matrix, false);
Bitmap reflectedBitmap = Bitmap.createBitmap(width,
(height + height / 2), Config.ARGB_8888);
Canvas canvas = new Canvas(reflectedBitmap);
canvas.drawBitmap(bitmap, 0, 0, null);
Paint defaultPaint = new Paint();
canvas.drawRect(0, height, width, height + reflectedGap, defaultPaint);
canvas.drawBitmap(reflectedImage, 0, height + reflectedGap, null);
Paint paint = new Paint();
LinearGradient shader = new LinearGradient(0, bitmap.getHeight(), 0,
reflectedBitmap.getHeight() + reflectedGap, 0x70ffffff,
0x00ffffff, TileMode.CLAMP);
paint.setShader(shader);
paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
canvas.drawRect(0, height, width, reflectedBitmap.getHeight()
+ reflectedGap, paint);
return reflectedBitmap;
}
