orientation sensor

Good evening ~ Today, I will continue to share with you the second important sensor. In fact, it is very easy to get the direction.ArticleA type_orientation keyword indicates that the device's moving direction can be directly obtained. However, the latest SDK adds the phrase "type_orientation this constant is deprecated. use sensormanager. getorientation () instead. that is to say, this method has been canceled and developers need to use sensormanager

Good evening ~ Today, I will continue to share with you the second important sensor. In fact, it is very easy to get the direction. In the first article, we will see a TYPE_ORIENTATION keyword, indicating that we can directly get the device's direction of movement, however, the latest SDK adds the following sentence: "TYPE_ORIENTATION This constant is deprecated. use SensorManager. getOrientation () instead. that is to say, this method has been cancel

data structure is defined in sensor. h,The sensormanager processes only the vector. V, vector. Status, and time fields and distributes them to registered listeners. For example, the first itemVector. V contains information values in the X, Y, and Z directions, which are registered by javasworientataionlister,After sensormanager obtains these three values, it passes them to worker worientataionlister. The latter code is located:Frameworkd/base/CORE/Ja

, Acoustic sensors, etc. There are also many extensions: Iris fingerprints ...... 3. Functions of Sensors Example: What type of sensors are used for the automatic flushing function in public toilets and how to implement automatic flushing? What type of sensors are used for the automatic sprinkler function in the building and how to implement automatic sprinkler. 4. Android sensor development (1) sensing types supported by Android Gyroscope

First, we need to understand a basic concept: the geomagnetic sensor must work with the gravity sensor, and the compass will work properly.I. Key points for commissioning:1. The gravity sensor has a directivity of 3 axes, and the data output of the geomagnetic sensor is also directional. We must configure the correct p

First, let's talk about Android Under the Platform 11 Sensor Type: 1. Accelerometer Acceleration: Describes acceleration. 2. Gravity Gravity, which we all know. 3. Gyroscope Gyroscope, which is more powerful for object drop detection. It will be a little pity if the development game is less, API level 9 New type. 4. Light Light sensors, many Android The screen brightness of the mobile phone is automatically adjusted according to the

different screens on different platforms, we recommend that you store images of different versions in different folders as needed. Screen direction: Automatic switching of landscape and portrait screens: You can create two layout-port and layout-land directories under the res directory, which are placed in two layout files: vertical screen and horizontal screen, in this way, the system automatically calls the corresponding layout file when the screen direction of the mobile phone changes, to av

This article translated from: http://developer.android.com/guide/topics/sensors/sensors_overview.html Most Android devices have built-in sensors for measuring motion, direction, and various environmental conditions. These sensors provide raw data with high precision and accuracy that can be used to monitor the movement and position of a device in three dimensions, or to monitor changes in the environment around the device. For example, a game may have to read tracks from Gravity Sensors to dedu

corresponding action. Here, the values of X, Y, and Z are printed tightly.Private final class mysensoreventlistener implements Sensoreventlistener {@ Override // obtain the variable value measured by the sensor in real time. Public void onsensorchanged (sensorevent event) {// If (event. sensor. getType () = sensor. type_accelerometer) {float x = event. values [

determine the position of the current device relative to its own reference system.Both the magnetic field sensor and the direction sensor return three values (SensorEvent. values), while the adjacent sensor returns only one value. Direction sensor: SensorEvent. values [0]:The angle of rotation around the Z axis. If th

What is orientation? Intuitively, we know that the "orientation" of an object mainly describes the orientation of an object. However, the "direction" and "orientation" are not exactly the same. A vector has a "direction" but no "orientation". The difference is that when a ve

; /* time is in nanosecond */ int64_t timestamp; union { float data[16]; /* acceleration values are in meter persecond per second (m/s^2) */ sensors_vec_t acceleration; /* magnetic vector values are inmicro-Tesla (uT) */ sensors_vec_t magnetic; /* orientation values are in degrees */ sensors_vec_t orientation; /* gyroscope

In 2.2, you can set the screen direction to reverse the horizontal screen: setrequestedorientation (8); because the system does not publish the setting of this parameter, but the screen_orientation_reverse_landscape parameter has been defined in the source code, however, the orientation of the screen cannot be fixed to reverse landscape screen or right landscape screen. When setting the screen direction to the Right horizontal screen, you must note th

Setup method: Add an attribute android:screenorientation to the activity in Androidmanifest.xml. For example, set the activity to landscapeandroid:screenorientation= "Landscape" >The screenorientation values are as follows:Landscape: LandscapePortrait: Portraitunspecified: Default value, automatically switched by system-determined stateUser : The orientation value currently set by users.behind: The orientation