/**
* Set the given bitmap into the background. When using setBitmap to set the background, the
* provided bitmap will be scaled and cropped to correctly fit within the dimensions of the view.
* The timing for when this becomes visible in the app is undefined and may take place after a
* small delay.
*/
public void setBitmap(Bitmap bitmap) {
if (DEBUG) {
Log.v(TAG, "setBitmap " + bitmap);
}
if (bitmap == null) {
setDrawableInternal(null);
return;
}
if (bitmap.getWidth() <= 0 || bitmap.getHeight() <= 0) {
if (DEBUG) {
Log.v(TAG, "invalid bitmap width or height");
}
return;
}
if (mBackgroundDrawable instanceof BitmapDrawable
&& ((BitmapDrawable) mBackgroundDrawable).getBitmap() == bitmap) {
if (DEBUG) {
Log.v(TAG, "same bitmap detected");
}
mService.setDrawable(mBackgroundDrawable);
return;
}
if (SCALE_BITMAPS_TO_FIT
&& (bitmap.getWidth() != mWidthPx || bitmap.getHeight() != mHeightPx)) {
// Scale proportionately to fit width and height.
Matrix matrix = new Matrix();
int dwidth = bitmap.getWidth();
int dheight = bitmap.getHeight();
float scale;
int dx;
if (DEBUG) {
Log.v(TAG, "original image size " + dwidth + "x" + dheight);
}
if (dwidth * mHeightPx > mWidthPx * dheight) {
scale = (float) mHeightPx / (float) dheight;
} else {
scale = (float) mWidthPx / (float) dwidth;
}
matrix.setScale(scale, scale);
if (DEBUG) {
Log.v(TAG, "original image size " + bitmap.getWidth() + "x" + bitmap.getHeight());
}
int subX = Math.min((int) (mWidthPx / scale), dwidth);
int subY = Math.min((int) (mHeightPx / scale), dheight);
dx = Math.max(0, (dwidth - subX) / 2);
bitmap = Bitmap.createBitmap(bitmap, dx, 0, subX, subY, matrix, true);
if (DEBUG) {
Log.v(TAG, "new image size " + bitmap.getWidth() + "x" + bitmap.getHeight());
}
}
BitmapDrawable bitmapDrawable = new BitmapDrawable(mContext.getResources(), bitmap);
setDrawableInternal(bitmapDrawable);
}
/**
* Set the given drawable into the background. The provided Drawable will be used unmodified as
* the background, without any scaling or cropping applied to it. The timing for when this becomes
* visible in the app is undefined and may take place after a small delay.
*/
public void setDrawable(Drawable drawable) {
if (DEBUG) Log.v(TAG, "setBackgroundDrawable " + drawable);
setDrawableInternal(drawable);
}