gravity | 易学教程

视图的填充和边距之间的区别

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 视图的边距和填充之间有什么区别？ #1楼填充是边界与实际图像或单元格内容之间的边界内的空间。边界是边界外部，边界与该对象旁边的其他元素之间的空间。 #2楼有时，您可以通过仅使用填充或边距来获得相同的结果。范例：说视图X包含视图Y（又名：视图Y在视图X内）。 -边距= 30的视图Y或填充= 30的视图X将获得相同的结果：视图Y的偏移量为30。 #3楼为了帮助我记住衬垫的含义，我想起一件大外套，上面有很多厚的棉衬垫。我在外套里，但是我和我的棉coat在一起。我们是一个单位。但是要记住余量，我想到：“ 嘿，给我一些余量！ ”这是我和您之间的空白。不要进入我的舒适区-我的边缘。为了更加清楚，这是 TextView 的填充和边距的图片：上图的xml布局 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" >

Center of gravity of a polygon

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问题 I am trying to write a PHP function that will calculate the center of gravity of a polygon. I've looked at the other similar questions but I can't seem to find a solution to this. My problem is that I need to be able to calculate the center of gravity for both regular and irregular polygons and even self intersecting polygons. Is that possible? I've also read that: http://paulbourke.net/geometry/polyarea/ But this is restricted to non self intersecting polygons. How can I do this? Can you

Android GridView Column Stretching

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问题 I have a GridView that is being used to display a number of rows of digits (see picture). I want each row to begin with a heading that says "Row n" for the nth row. However, the TextView containing "Row n" is being occluded by the other digits. The more digits being displayed, the worse the occlusion. How can I allow my "Row n" TextView to be displayed in full? FYI: The gridview has gravity: center, stretch mode: columnWidth, height and width are fill parent. The textview containing "Row n"

Can I Define my own form markup and map with to the form generated using Gravity Form (wordpress plugin)?

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问题 I am using Gravity Forms in my wordpress site. I want a way in which I can define my own form markup and map it to the form generated using Gravity Forms so when someone submits the form it mails to the email id defined in gravity form and also adds to the gravity form section in wordpress backend. 回答1: This will allow for placeholder text in text inputs for Gravity Forms. Gravity Forms Placeholder Text You may have to delete the very first <?php from this block of code. You'll then have an

Drag elements around with gravity effect

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问题 I want to accomplish something similar to what photoshop.com has and this site here: http://mrdoob.com/projects/chromeexperiments/google_gravity/ Does anyone know how to do this with javascript (preferably jquery) ? 回答1: A jPhysics demo can be found online at http://www.inf.ufrgs.br/~rcpinto/physics/ and downloaded from http://plugins.jquery.com/project/jphysics or from Google at http://code.google.com/p/jqueryphysics/ 回答2: I think the google example used Box2Djs. I have used box2d for python

Android Layout Gravity

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问题 I am trying to create a layout where when in Portrait mode the layout_gravity should be center_vertical and when i am in Landscape mode it should be top. When i have center_vertical in landscape mode the layout is positioned to the center and i can scroll up.. Portrait Landscape How can i do this in a single layout file and not having multiple ones. Layout code: <?xml version="1.0" encoding="utf-8"?> <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width=

How to set gravity to layout programmatically?

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问题 I am creating a chat application in which i need to align the chat messages accordingly.I need to align those from the user to right side and others to the left side.I have a listview in which the messages are displayed.For now,i am using bundled json for getting data.Here is my code This is for appending a string to the message typed by the user which is checked and splitted inorder to recognize messages from the user. final EditText et = (EditText)findViewById(R.id.EditText1); final Button

Creating game gravity in Android?

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问题 I am trying to create in game gravity in Android. I created an update method, a display, and gravity. Right now the app does not force close, but the ball just doesn't move. Do I need to use a canvas for the .getHieght() and .getWidth() methods? public class MainActivity extends Activity { private int c = Color.YELLOW; private Canvas g; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); draw(); } @Override

Pygame: How do I make my image fall?

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问题 I am trying to make objects fall like they would on earth. I already got them to blit where I wanted them to but I can't seem to animate them. This is the object that I want to fall import pygame class circle(): def __init__(self, screen): planet_color = (255,0,0) planet_radius = 20 self.screen = screen ev = pygame.event.get() self.image = pygame.image.load('../images/jupiter.bmp') self.image = pygame.transform.scale(self.image, (80, 80)) def blitme(self): self.x = pygame.mouse.get_pos() self

Android image view gravity

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问题 How can I dynamically set the gravity ? Bitmap bmp; im = new ImageView (this); bmp=getbmp(img); im.setImageBitmap(bmp); Now I would like to put the image in the top . Ho can I do this without android:gravity in main.xml ? EDIT : main.xml <?xml version="1.0" encoding="utf-8"?> <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:scrollbars="vertical" > </ScrollView> I have a frame layout and I add