Android Rect 对象中的顶部、左侧、右侧和底部是什么意思
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What does top, left, right and bottom mean in Android Rect object
提问by Hunsu
I have an Android project where I should make Apples fall. The apples are painted in a Rect. So I created a function that change the Rect position and repaint. Here's my function :
我有一个 Android 项目，我应该让苹果掉下来。苹果被画在一个矩形中。所以我创建了一个改变 Rect 位置并重新绘制的函数。这是我的功能：
private void updateApplesPosition() {
for(Rect rect:fallingDownFruitsList)
rect.set(rect.left, rect.top +10, rect.right, rect.bottom +10);
}
I have a problem : the Apples don't fall but go from right to left. To make the apples fall I changed the code by this :
我有一个问题：苹果不会掉下来，而是从右到左。为了让苹果掉下来，我通过以下方式更改了代码：
private void updateApplesPosition() {
for(Rect rect:fallingDownFruitsList)
rect.set(rect.left+10, rect.top, rect.right+10, rect.bottom);
}
回答by LOG_TAG
This image will explain you in detail:
此图将为您详细解释：
leftThe X coordinate of the left side of the rectangle
topThe Y coordinate of the top of the rectangle
rightThe X coordinate of the right side of the rectangle
bottomThe Y coordinate of the bottom of the rectangle
left矩形左侧的 X 坐标
top矩形顶部的 Y 坐标
right矩形右侧的 X 坐标
bottom矩形底部的 Y 坐标
回答by adneal
Parameters
参数
leftThe X coordinate of the left side of the rectangle
topThe Y coordinate of the top of the rectangle
rightThe X coordinate of the right side of the rectangle
bottomThe Y coordinate of the bottom of the rectangle
left矩形左侧的 X 坐标
top矩形顶部的 Y 坐标
right矩形右侧的 X 坐标
bottom矩形底部的 Y 坐标
