compass app without magnetic sensor

Android practice simple tutorial-62nd guns (electronic Sensor exact Compass) Here we use the sensor provided by the mobile phone to implement a simple small example of the electronic compass. You can learn how to use the SensorManager class, SensorEventListener and its overwriting method. First, create a layout file:

involves three concepts:Roll: left and right tilt angle, also called Rolling Angle http://baike.baidu.com/view/1769672.htmPitch: front and back tilt, also called the pitch angle http://baike.baidu.com/view/3832041.htmYaw: Left and Right swing, also called yaw angle http://baike.baidu.com/view/1769448.htm The following code is the source code of/development/samples/compass in android2.3. It demonstrates how to determine the placement posture and orien

data to the actual gravity coordinate. Generally, it can be set to null by default. The third is an array of 3, indicating that the data obtained from the accelerometer is in onsensorchanged. The fourth is an array of 3, which indicates the data obtained from the magnetic sensor.In onsensorchanged Well, the basic logic is like this. The following is an example of a simple test direction, which can monitor the user's direction at all times.

. The second is a conversion matrix, which converts the magnetic field data to the actual gravity coordinate. Generally, it can be set to null by default. The third is an array of 3, indicating that the data obtained from the accelerometer is in onSensorChanged. The fourth is an array of 3, indicating that the data obtained from the magnetic sensor is in onSensor

measurement mode, single measurement I used a bit, not very good, so the following main introduction of continuous measurement. Configuration as a continuous measurement is simple, is the above mode register, address 0x02 As you can see, configuring a continuous measurement mode requires only writing the mode register to 0x00. Configuration to continuous, configured as sequential read mode there is a very important place to remember: read XYZ, must read 6 bytes at a time, that is, all r

I just followed the video to learn the operation examples of sensors in Android, and made a very simple compass application using the direction sensor... Sensor functions are rarely used in work projects, so many of them don't know. Now I want to learn more about it as a step-by-step approach... First paste the software for final operation The image material use

Step 1:Create a new project Compass and import a Compass image to the res/drawable-hdpi directory. Step 2:Design the application UI, main. xml Copy codeThe Code is as follows: Android: orientation = "vertical" Android: layout_width = "fill_parent" Android: layout_height = "fill_parent" Android: gravity = "center" > Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: src