我有以下代码：
public Drawable getMergedIcon(Drawable origIcon) {
Bitmap underlayBitmap = null, overlayBitmap = null;
if (isSupportUnderlays()) {
int overlayId = r.nextInt(Underlays.size());
underlayBitmap = Underlays.get(overlayId);
if(Overlays.size() == Underlays.size()) {
overlayBitmap = Overlays.get(overlayId);
}
if(underlayBitmap == null) {
return origIcon;
}
boolean needResize = false;
int targetWidth, targetHeight;
Bitmap iconBitmap = ((BitmapDrawable) origIcon).getBitmap();
if(iconBitmap.getHeight() > underlayBitmap.getHeight()) {
targetWidth = iconBitmap.getWidth();
targetHeight = iconBitmap.getHeight();
needResize = true;
} else {
targetWidth = underlayBitmap.getWidth();
targetHeight = underlayBitmap.getHeight();
}
Paint paint = new Paint();
Bitmap result = Bitmap.createBitmap(targetWidth, targetHeight, iconBitmap.getConfig());
Canvas canvas = new Canvas(result);
if(!needResize) {
canvas.drawBitmap(underlayBitmap, 0, 0, paint);
} else {
canvas.drawBitmap(Bitmap.createScaledBitmap(underlayBitmap, targetWidth,targetHeight, false), 0, 0, paint);
}
int left = (targetHeight - (int) (targetHeight * iconScale)) / 2;
int top = (targetWidth - (int) (targetWidth * iconScale)) / 2;
iconBitmap = Bitmap.createScaledBitmap(iconBitmap, (int) (targetWidth * iconScale),(int) (targetHeight * iconScale), false);
canvas.drawBitmap(iconBitmap, left, top, paint);
if(overlayBitmap != null) {
if(!needResize) {
canvas.drawBitmap(overlayBitmap, 0, 0, paint);
} else {
canvas.drawBitmap(Bitmap.createScaledBitmap(overlayBitmap, targetWidth,targetHeight, false), 0, 0, paint);
}
}
canvas.save();
BitmapDrawable icon = new BitmapDrawable(mContext.getResources(), result);
return icon;
}
return origIcon;
}
它从叠加层和底层中获取随机位图，并在其之间放置图标，但是当我调用此函数时，图层会随机丢失。fe 在第一次通话时我有底层和图标，在第二次覆盖和图标等我总是有图标，但只有一个层（底层或覆盖），从不使用它们中的机器人。