我正在编写一个小项目,我需要从给定对象到我的鼠标的一行。我做了一些工作,想出了这个快速而又脏的代码:
addListener(new ClickListener() {
Image lineImage;
Pixmap pixmap;
@Override
public void touchDragged(InputEvent event, float x, float y, int pointer) {
// Get Actor Origin
// Get local Origin
int x2 = (int) event.getListenerActor().getX(Align.center);
int y2 = (int) event.getListenerActor().getY(Align.center);
// Make it global
x2 = (int) event.getListenerActor().getParent().getX() + x2;
y2 = (int) event.getListenerActor().getParent().getY() + y2;
// Get Stage Coordinates
Vector2 v = localToStageCoordinates(new Vector2(x, y));
Vector2 v2 = new Vector2(x2, y2);
Stage stage = event.getStage();
int width = (int) stage.getWidth();
int height = (int) stage.getHeight();
if (pixmap == null) {
pixmap = new Pixmap(width, height, Pixmap.Format.RGBA8888);
} else {
pixmap.setColor(1, 1, 1, 0);
pixmap.fill();
}
pixmap.setColor(Color.BLUE);
// line
for (int m = -2; m <= 2; m++) {// x
for (int n = -2; n <= 2; n++) {// y
pixmap.drawLine((int) (v2.x+m), (int) (height-v2.y+n) , (int) (v.x+m), (int) (height-v.y+n));
}
}
if (lineImage != null) {
/*lineImage.clear();
lineImage.remove();
*/
lineImage.setDrawable(new SpriteDrawable(new Sprite(new Texture(pixmap))));
} else {
lineImage = new Image(new Texture(pixmap));
}
lineImage.setPosition(0,0);
stage.addActor(lineImage);
// super.touchDragged(event, x, y, pointer);
}
@Override
public void touchUp(InputEvent event, float x, float y, int pointer, int button) {
if (lineImage != null) {
lineImage.clear();
lineImage.remove();
}
lineImage = null;
super.touchUp(event, x, y, pointer, button);
}
});
问题是,当我在Image上使用此Listener并激活touchdragged大约20秒时,会出现内存泄漏。 我不知道为什么会发生这种情况,我尝试了很多东西,但没有接缝可以帮我解决这个问题。你有什么想法吗?
答案 0 :(得分:1)
@noone是对的。在将drawable分配给lineImage后,添加注释的行以处理像素图。
if (lineImage != null) {
/*lineImage.clear();
lineImage.remove();
*/
lineImage.setDrawable(new SpriteDrawable(new Sprite(new Texture(pixmap))));
} else {
lineImage = new Image(new Texture(pixmap));
}
pixmap.dispose(); // <-----------Add this line here!!!
lineImage.setPosition(0,0);
stage.addActor(lineImage);