4.组合bitmap图片（也就是将我们的图片用Canvas画到一起）
/**
* 获得合在一起的bitmap
* @param mEntityList
* @param bitmaps
* @return
*/
public static Bitmap getCombineBitmaps(List<BitmapBean> mEntityList,
Bitmap... bitmaps) {
Bitmap newBitmap = Bitmap.createBitmap(200, 200, Bitmap.Config.ARGB_8888);
for (int i = 0; i < mEntityList.size(); i++) {
bitmaps[i] = GetRoundedCornerBitmap(bitmaps[i]);
newBitmap = mixtureBitmap(newBitmap, bitmaps[i], new PointF(
mEntityList.get(i).getX(), mEntityList.get(i).getY()));
}
return newBitmap;
}
这里我为了好看将图片设置成圆形的了
/**
* 获取圆形的bitmap
* @param bitmap
* @return
*/
public static Bitmap GetRoundedCornerBitmap(Bitmap bitmap) {
try {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(),
bitmap.getHeight());
final RectF rectF = new RectF(new Rect(0, 0, bitmap.getWidth(),
bitmap.getHeight()));
final float roundPx = 50;
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(Color.BLACK);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
final Rect src = new Rect(0, 0, bitmap.getWidth(),
bitmap.getHeight());
canvas.drawBitmap(bitmap, src, rect, paint);
return output;
} catch (Exception e) {
return bitmap;
}
}
最后开画
/**
* 画bitmap
* @param first
* @param second
* @param fromPoint
* @return
*/
public static Bitmap mixtureBitmap(Bitmap first, Bitmap second,
PointF fromPoint) {
if (first == null || second == null || fromPoint == null) {
return null;
}
Bitmap newBitmap = Bitmap.createBitmap(first.getWidth(),
first.getHeight(), Bitmap.Config.ARGB_8888);
Canvas cv = new Canvas(newBitmap);
cv.drawBitmap(first, 0, 0, null);
cv.drawBitmap(second, fromPoint.x, fromPoint.y, null);
cv.save(Canvas.ALL_SAVE_FLAG); //保存全部图层
cv.restore();
return newBitmap;
}
