gravity

I listened to this talk: http://www.youtube.com/watch?v=C7JQ7Rpwn2k which is Invensense Inc prototyping their "Sensor fusion" system, which is where they combine gyro, accelerometer, compass measurements in Android, to get better results. Is this currently implemented in any version of Android? The reason I ask is, part of sensor fusion is the "Gravity" sensor and the "Linear Acceleration" sensor, which ARE implemented in Android ever since API Level 9... makes me think that either 1) sensor fusion is implemented 2) sensor fusion is not implemented, but these are just added into Android API in

ConstraintLayout 翻译为 约束布局，也有人把它称作 增强型的相对布局，由 2016 年 Google I/O 推出。 扁平式的布局方式，无任何嵌套，减少布局的层级，优化渲染性能。从支持力度而言，将成为主流布局样式，完全代替其他布局。 版本 Android Studio是2.2或以上版本 ConstraintLayout是一个Support库，意味着向前兼容，它可以兼容至API 9，也就是Android 2.3，鉴于现在市场上手机基本都是2.3及以上的，所以如果不是特殊情况，开发者可以不用考虑版本问题。 需要在build.gradle中加入 implementation 'com.android.support.constraint:constraint-layout:1.1.1' 新特性 相对于传统布局，ConstraintLayout在以下方面提供了一些新的特性： 相对定位 外边距 居中和倾向 可见性的表现 尺寸约束 Chain 辅助工具 Layout Editor全景 工具栏(Toolbar)：提供在编辑器中配置布局外观和编辑布局属性的按钮 Palette：提供小部件和布局的列表，您可以将它们拖动到编辑器内的布局中 Component Tree：显示布局的视图层次结构。在此处点击某个项目将看到它在编辑器中被选中 设计视图：用来显示界面 blueprint视图

Android项目开发之--------地铁时光机（一，搭建主框架） 一：先看一下框架搭建后的效果图 ， 二：框架结构 　　（1）底部导航栏采用的是： MainActivity(主框架）， MsgFragment(首页）， HistoryFragment(历史清单含顶部导航栏）， MineFragment(我的）。 　　（2）自定义标题栏（自定义toolbar） 三：底部导航栏的实现 主要代码： MainActivity: 复制代码 1 //定义底部文字 2 private final int[] TAB_TITLES = new int[]{ 3 R.string.menu_msg, R.string.menu_history, R.string.menu_mine 4 }; 5 //定义底部图标 6 private final int[] TAB_IMGS = new int[]{ 7 R.drawable.tab_main_msg, R.drawable.tab_main_history, R.drawable.tab_main_mine 8 }; 9 //黄油刀 找到控件 10 @BindView(R.id.view_pager) 11 ViewPager viewPager; 12 @BindView(R.id.tab_layout) 13 TabLayout

作者介绍： 吕磊 ，摩拜单车高级 DBA。 一、业务场景 摩拜单车 2017 年开始将 TiDB 尝试应用到实际业务当中，根据业务的不断发展，TiDB 版本快速迭代，我们将 TiDB 在摩拜单车的使用场景逐渐分为了三个等级： P0 级核心业务：线上核心业务，必须单业务单集群，不允许多个业务共享集群性能，跨 AZ 部署，具有异地灾备能力。 P1 级在线业务：线上业务，在不影响主流程的前提下，可以允许多个业务共享一套 TiDB 集群。 离线业务集群：非线上业务，对实时性要求不高，可以忍受分钟级别的数据延迟。 本文会选择三个场景，给大家简单介绍一下 TiDB 在摩拜单车的使用姿势、遇到的问题以及解决方案。 二、订单集群（P0 级业务） 订单业务是公司的 P0 级核心业务，以前的 Sharding 方案已经无法继续支撑摩拜快速增长的订单量，单库容量上限、数据分布不均等问题愈发明显，尤其是订单合库，单表已经是百亿级别，TiDB 作为 Sharding 方案的一个替代方案，不仅完美解决了上面的问题，还能为业务提供多维度的查询。 2.1 订单 TiDB 集群的两地三中心部署架构 <center>图 1 两地三中心部署架构图</center> 整个集群部署在三个机房，同城 A、同城 B、异地 C。由于异地机房的网络延迟较高，设计原则是尽量使 PD Leader 和 TiKV Region

I'm using The last version of Android Studio (1.5) and I want to make a menu using Drawer Layout, for position its call GravityCompat. I'm trying to use this components and modify it, putting the Drawer out from right to left. Here is my code. public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); DrawerLayout

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="fill_parent" android:layout_height="fill_parent" android:background="@drawable/splash_background

I have a sprite (with a body) that bounces around the scene. It needs to be unaffected by gravity, but also able to collide with other bodies on the scene. This means I cannot use a kinematic body. I tried: body = PhysicsFactory.createCircleBody(mPhysicsWorld, this, BodyType.DynamicBody, PhysicsFactory.createFixtureDef(.5f, .5f, .5f)); MassData md = new MassData(); md.mass=0; body.setMassData(md); mPhysicsWorld.registerPhysicsConnector(new PhysicsConnector(this, body, true, true)); with different values for my FixtureDef, but nothing seemed to work. My body still falls to the bottom of the

I am making a game that is similar to Doodle Jump, getting your player as high as possible. Now, I got my player working, and moving. But, the problem is, I don't have gravity, or anything that will make the player fall down onto the ground again. Do you guys have any idea of doing this? I tried having the player get a constant force, being pushed down at all times, but, it's not smooth, and it doesn't act like real falling. Can I have some help with making this player-falling system? Edit: GRAVITY = 10; TERMINAL_VELOCITY = 300; vertical_speed = 0; public void fall(){ this.vertical_speed =