私はアンドロイドの初心者で、9 つの古い Android フレークのデモをアプリに実装しようとしています。ただし、画像リソースをデモで使用されている画像から選択したものの 1 つに変更すると、アプリがクラッシュし、IllegalArgumentException: width and height must be > 0 と表示されます。 . デモ画像の幅が 75px x 90px で、私の画像の幅が 166px x 72px である理由がわかりません。どんな助けでも大歓迎です。
FLAKE VIEW CLASS (Flake を作成する場所)
void addFlakes(int quantity) {
for (int i = 0; i < quantity; ++i) {
flakes.add(Flake.createFlake(getWidth(), droid)); //This line causes exception
}
setNumFlakes(numFlakes + quantity);
}
/**
* Subtract the specified number of droidflakes. We just take them off the end of the
* list, leaving the others unchanged.
*/
void subtractFlakes(int quantity) {
for (int i = 0; i < quantity; ++i) {
int index = numFlakes - i - 1;
flakes.remove(index);
}
setNumFlakes(numFlakes - quantity);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
// Reset list of droidflakes, then restart it with 8 flakes
flakes.clear();
numFlakes = 0;
addFlakes(8); //This line causes exception
// Cancel animator in case it was already running
animator.cancel();
// Set up fps tracking and start the animation
startTime = System.currentTimeMillis();
prevTime = startTime;
frames = 0;
animator.start();
}
FLAKE CLASS (スケーリングされたビットマップを作成する場所)
static Flake createFlake(float xRange, Bitmap originalBitmap) {
Flake flake = new Flake();
// Size each flake with a width between 5 and 55 and a proportional height
flake.width = (int)(5 + (float)Math.random() * 50);
float hwRatio = originalBitmap.getHeight() / originalBitmap.getWidth();
flake.height = (int)(flake.width * hwRatio);
// Position the flake horizontally between the left and right of the range
flake.x = (float)Math.random() * (xRange - flake.width);
// Position the flake vertically slightly off the top of the display
flake.y = 0 - (flake.height + (float)Math.random() * flake.height);
// Each flake travels at 50-200 pixels per second
flake.speed = 50 + (float) Math.random() * 150;
// Flakes start at -90 to 90 degrees rotation, and rotate between -45 and 45
// degrees per second
flake.rotation = (float) Math.random() * 180 - 90;
flake.rotationSpeed = (float) Math.random() * 90 - 45;
// Get the cached bitmap for this size if it exists, otherwise create and cache one
flake.bitmap = bitmapMap.get(flake.width);
if (flake.bitmap == null) {
flake.bitmap = Bitmap.createScaledBitmap(originalBitmap, //This line causes exception
(int)flake.width, (int)flake.height, true);
bitmapMap.put(flake.width, flake.bitmap);
}
return flake;
}