Android sensor (SENSOR_TYPE_ORIENTATION)
SENSOR_TYPE_ORIENTATION is not recommended after android 2.2 !!!
Mobile phone status
Numerical status
Value Range
Mobile phone horizontal placement, top pointing to North
The value of x, y, and z is 0.
Let's take a look at the simulation of the shaking function, we are based on the mobile phone accelerometer to achieve this function, the implementation of the method is relatively simple.Mainactivity.java:Mainactivity.java: Packagecom.location.activity;Importandroid.app.Activity;ImportAndroid.content.Context;ImportAndroid.hardware.Sensor;ImportAndroid.hardware.SensorEvent;ImportAndroid.hardware.SensorEventListener;ImportAndroid.hardware.SensorManager
The coordinate system of the Android sensor is not the same as its 2D design, with coordinate systems such as:Once the sensor listener is registered with the Sensormanager object, an object of sensorevent can be obtained within the Onsensorchanged method.The Sensorevent object has an important member variable public final float[] values, which are defined as foll
Many of the game's games in Android use the technology of gravitational induction, which is a study of gravity sensing
With the bottom left of the screen as the origin, the arrow is pointing in a positive direction. From-10 to 10, with floating-point numbers as a unit, imagine the following scenario:
The value of (X,y,z) is (0,0,10) when the mobile screen is horizontally positioned upward (z-axis);
The value of (X,y,z) is (0,0,-10) when the cell
two, acceleration sensors and linear acceleration sensors, which one should we choose, the accelerometer provides data that is the acceleration of the mobile phone under gravity, the data provided by the linear acceleration sensor is the acceleration of the mobile phone that excludes gravity, and can intuitively reflect the force of the mobile
be passed, and the method of the fragment object to invoke its value directly.The fragment lifecycle method is the same as the life cycle method of the activity and is bound, the old fragment object is destroyed when the fragment is switched, and the new fragment object is createdFrame Animation:A picture of the continuous switch to form an animation effect, Android phone's boot interface is made by frame animationHow to use frame animations yourself
desktop repeatedly;
Send messages by letter in the application drawer. It is difficult to find the desired application and the location cannot be determined;
There is no uniform interaction between the horizontal screen flip and the pull-down mode of the application drawer for desktop application shortcuts, increasing the cost of thinking.
Avoid multi-entry and multi-interaction in application development. You need to find the target object at the specified position.
Exit Software
Press
verification information to the carrier's server via text message. After the server completes the registration, the registration result will be sent to the mobile phone via text message. The content delivered varies according to different conditions.If the server sends a text message that does not contain the phone number, the phone number cannot be obtained. If
how the 1.android coordinate system defines the x, y Z axis
The direction of the x-axis is the horizontal direction of the screen from left to right, if the cell phone is not a square, the shorter side needs to be placed horizontally, the longer side needs to be placed vertically.
The y-axis is directed from the bottom left corner of the screen to the top of the screen along the vertical direction of the
When playing games, the general use of a variety of sensors, in order to achieve a richer UI interaction, such as the detection of mobile phone shaking.How do you measure the shaking and shaking of your phone?Some information was found and improved to encapsulate this function into a class (Shakedetector) for future use.Http://blog.csdn.net/ZhengZhiRen/archive/2010/10/09/5930451.aspxThe shake detection is b
, the word limit makes long story unattractive, and the limitations of storing data also lead to additional parsing of strings at development time. A good thing is going to be on Amazon's hands, and maybe Amazon is just trying to use it, and opening it to developers is very polite.There are more or less similar problems with other APIs, and if you want to provide support for your Fire phone, you will have to endure Amazon's limitations. But for a lot
The garden today when using Android phone to install the game, encountered the prompt "Your device does not support the add-on attribute" situation, the software will not install after the hint. This article shares the solution of "Your device does not support add-on properties" When you install software using an Android phon
application and the location cannot be determined;
◆ There is no uniform interaction between the horizontal screen flip of desktop application shortcuts and the pull-down of application drawers, increasing the cost of thinking.
Note: Avoid multi-entry and multi-interaction in application development. You need to find the target object at the specified position.
Exit Software
◆ Press the home screen key to return to the home screen without stopping the activity. The application is still ru
Android content:
Why is the webpage view of Android displayed on a black screen?
In Android, how does one handle changes in the screen direction when the progress dialog box and background thread activity?
How does Android call oncreat () multiple times in an activity ()
How does
sensor sensor;//gravity sense listener Private Onshakelistener onshakelistener;//Context Private Context mcontext;//phone last position when gravity sensing coordinates private float lastx;private float lasty;private float lastz;//Last detection Time private loNg lastupdatetime;//Constructor Public Shakelistener (Context c) {//Get Listener Object Mcontext = C;st
Pre-Article: Analysis of Working Process of Android 4.4 Kitkat Phone (1) _ overview and learning plan
Android 4.4 Kitkat Phone workflow analysis (ii) _ UI Structure Analysis
Android 4.4 Kitkat Phone workflow analysis (iii) _ MO (P
The 1.android coordinate system defines the x, y z axes.
The direction of the x-axis is the horizontal direction of the screen from left to right, if the cell phone is not a square, the shorter side needs to be placed horizontally, the longer side needs to be placed vertically.
The y-axis is directed from the bottom left corner of the screen to the top of the screen along the vertical direction of the scr
Mobile phone by virtue of the two basic functions of call and SMS, accumulated users, opened up the market. But the user's demand is endless, for handset manufacturers, closely follow the user needs, expand the function of mobile phones, is the opportunity is also a challenge.1988 the first digital camera, listed in Japan. The key to digital cameras isphotosensitive Chip。 The original data camera, using theCCD Chip。 At the beginning of the 1990, NASA
devices that support Android (mobile phones, tablets, TVs, watches), device fragmentation, brand fragmentation, system fragmentation, sensor fragmentation, and screen fragmentation continue to deepen. And what we're going to talk about today is the fragmentation of the screen, which has a bigger impact on our development.The image below is the size of the Android
drop (install APK) function, you can use as needed.This is a deskdock using the MacBook's own touchpad and keyboard to control the Android phone's motion diagram Demo:650) this.width=650; "class=" AlignCenter size-medium "src=" http://ww3.sinaimg.cn/mw690/ 72fbcfa5gw1f89rzsb2b5g20hs0a0e87.gif "alt=" Deskdock "width=" 640 "height=" "style=" border:0px;text-align:center; Margin-left:auto;margin-right:auto; "
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