The use of the sensor in the direction of Android development(2011-10-13 20:56:05)reproduced
Tags: android sensor direction Compass talk
Category: 3GAndroid Learning Notes
The orientation sensor in Andro
Gravity sensing is mainly used in game development. This effect is very good! It is mainly three axes. It is easy to understand: that is facing up, the value is positive, and the value is down negative! I have tested this effect, because gravity sensing can be realized on the mobile phone, so no. Sorry! Reprinted please indicate the source: http://blog.csdn.net/wdaming1986/article/details/6752232
1. MainActivity. Java code:
Package com. ray. test;
Import
With the development of mobile phones, there are now more and more sensor types supported by mobile phones, in the development of the use of sensors to carry out some of the operation is a refreshing feeling, such as shaking in the wave, as well as the mobile phone music player in the shake-cut song. Here's a brief introduction to the use of sensors in Android and some commonly used sensors today. First, th
Now there are all kinds of sensors in Android phones, such as accelerometers, gyroscopes and the like, I now use a total of nine sensors in the Vivo V3 phone:Lis3dh-accel : Tri-axis acceleration sensorTmd277x-proximity : Near distance sensorTmd277x-light : Light sensorYas533-orientation : Direction sensorYas533-pseudo-gyro : Motion sensorYas533-linear-acceleration : Linear acceleration SensorYas533-rotation-vector : rotational vector sensorYas533-grav
First, we will introduce what a sensor is.
Sensor (sensor ):Wikipedia tells me:SensorIt is a device that receives signals or stimulates and reacts. It can convert the physical quantity or chemical quantity to another suitable output.
For example, gravity sensor and direction Sensor
Android acceleration sensor: The implementation of the shake function and android Acceleration
I. Principles:
The shake function in the Android mobile phone is already very common. Recently, I came into contact with this function. The principle is very simple: using an acceleration
is the Android system architecture diagram, from which you can tell that sensor must penetrate all levels of the architecture. According to the architecture hierarchy, the sensor architecture is analyzed in five ways:1. The app layer of the sensor architecture;2. The framework layer of the
Let's take a look at the sensormanager code.
Sensormanager framework Layer Code
@ Frameworks/base/CORE/Java/Android/hardware/sensormanager. Java
Public sensormanager (lodomainmainloiter) {mmainloiter = mainloiter; // As mentioned above, this is the activity's lodomainsynchronized (slisteners) {If (! Ssensormoduleinitialized) {ssensormoduleinitialized = true; nativeclassinit (); // it seems that the local method is called to initialize swindowmanager
Sensor local encapsulation class sensordevice
Sensordevice is the abstract type encapsulation of the sensorservice to the sensor device in local code. It encapsulates the hardware operations of the sensor hardware, which inherits the singleton class, the getinstance method is used to obtain the device operation object in singleton mode:
@ Frameworks/base/services
Android motion sensor
Android motion sensor
The Android platform supports some sensors used to monitor device movements (five such sensors ). Two of them are pure hardware sensors. The other three (Gravity Sensors, linear acceleration sensors, and Rotation Vector Sensors) ma
JAVA programWe use the sensor interface to register the SensorListener as follows:**************************************** **********************ApiDemo:MGraphView = new GraphView (this );MSensorManager. registerListener (mGraphView ,....);**************************************** **********************The listener here is the control that changes when the sensor status changes.Reload the onSensorChanged and
Android location sensor
The Android platform provides two sensors to determine the location of the device. These two sensors are magnetic field sensors and direction sensors. The Android platform also provides a sensor (proximity sensor
for sensors that are monitored by this application (see below for more information). The parameters of the method include: An integer indicating the change of the sensor; a floating-point value array that represents the sensor data itself. Some sensors provide only one data value, while others provide three floating-point values. Both the direction and accelerometer sensors provide three data values.The on
1. Architecture
2. Data Structure
3. Four major functions
In this paper, G-sensor is used as an example to explore the android hierarchy.
1. Architecture
The architecture of android can be divided into four layers.
The first layer is the underlying driver layer, which includes the standard Linux, Android core dri
Today's smartphones are equipped with a wide variety of sensors, this article describes the sensor development interface provided by the Android SDK, and shows how to use these interfaces with a simple example.Andriod SDK Sensor related classesThe Android SDK provides sensor
Monitor sensor events
To monitor raw sensor data, you need to implement two callback methods exposed through the SensorEventListener interface: onAccuracyChanged () and onSensorChanged (). The Android system calls these two methods when any of the following occurs:
1. Changes in sensor accuracy:
In this case, the syste
Recently, I am working on a network call APK, which features the same SIM card phone number as the mobile phone number. Although only Java is used, many problems are also encountered. One of them is to simulate the status of the call and control the screen lock. I know it is achieved through the distance sensor on the mobile phone, but after a long time, I finally got the result and shared it with me. : Http://download.csdn.net/detail/luozhi3527/59590
Sensors on the Android platform include the accelerometer, orientation, magnetic field, and light ).
The development of sensor applications on the Android platform is implemented through the listener mechanism. The main steps to develop applications for one or more sensors are as follows:
1. Create a sensormanager object
2. Implement the sensorlistener Int
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