Android-driven gyroscope code and Android-based gyroscope code

Android-driven gyroscope code and Android-based gyroscope code

 

Android-driven gyroscope code:

Source http://www.cnblogs.com/xiaobo-Linux/ qq463431476

Package zcd. functions; import zcd. netanything. r; import android. app. fragment; import android. content. context; import android. hardware. sensor; import android. hardware. sensorEvent; import android. hardware. sensorEventListener; import android. hardware. sensorManager; import android. OS. bundle; import android. util. log; import android. view. layoutInflater; import android. view. view; import android. view. viewGroup; import Android. widget. textView; public class VR extends Fragment implements SensorEventListener {private SensorManager sensorManager; private Sensor magneticSensor; private TextView showTextView; private Sensor accelerometerSensor; private Sensor gyroscopeSensor; // convert the nanoseconds to private static final float NS2S = 1.0f/100001_0.0f; private float timestamp; private float angle [] = new float [3]; public View o NCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {// TODO Auto-generated method stub View view = inflater. inflate (R. layout. vr, container, false); showTextView = (TextView) view. findViewById (R. id. text); return view;} public void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); sensorManager = (SensorManager) getActivity (). getSystemService (Context. SENSOR_SERVICE); magneticSensor = sensorManager. getdefasensensor (Sensor. TYPE_MAGNETIC_FIELD); accelerometerSensor = sensorManager. getdefasensensor (Sensor. TYPE_ACCELEROMETER); gyroscopeSensor = sensorManager. getdefasensensor (Sensor. TYPE_GYROSCOPE); // register the gyroscope sensor and set the time interval that the sensor outputs to the application to be SensorManager. SENSOR_DELAY_GAME (20000 microseconds) // SensorManager. SENSOR_DELAY_FASTEST (0 microseconds): the fastest. The lowest latency is not recommended for processing especially sensitive data. This mode may consume a large amount of electricity on mobile phones, failure to handle litigation affects the game logic and UI performance // SensorManager. SENSOR_DELAY_GAME (20000 microseconds): game. Game latency. Generally, most games with high real-time performance use this level // SensorManager. SENSOR_DELAY_NORMAL (200000 microseconds): normal. Standard latency, which can be used for general games of the benefit or EASY level, but a low sampling rate may be frame-jumping for some racing games // SensorManager. SENSOR_DELAY_UI (60000 microseconds): user interface. Generally, it is used for automatic screen rotation, which saves power and logic processing. Generally, sensorManager is not used in game development. registerListener (this, gyroscopeSensor, SensorManager. SENSOR_DELAY_GAME); sensorManager. registerListener (this, magneticSensor, SensorManager. SENSOR_DELAY_GAME); sensorManager. registerListener (this, accelerometerSensor, SensorManager. SENSOR_DELAY_GAME);} // The coordinate axes indicate that the horizontal direction from the left to the right of the mobile phone is positive on the X axis, and that from the bottom to the top of the mobile phone is positive on the Y axis, vertical to the mobile phone screen up to the Z axis forward @ Override public void onSensorChanged (S EnsorEvent event) {if (event. sensor. getType () = Sensor. TYPE_ACCELEROMETER) {// x, y, and z respectively store the acceleration float x = event on the x, y, and z axes. values [0]; float y = event. values [1]; float z = event. values [2]; // The total acceleration value is a float a = (float) Math based on the acceleration in three directions. sqrt (x * x + y * y + z * z); System. out. println ("a ---------->" + a); // The time interval between sensors collecting data from the outside is 10000 microseconds. out. println ("magneticSensor. getMinDelay () --------> "+ magneticS Ensor. getMinDelay (); // maximum range of the accelerometer System. out. println ("event. sensor. getMaximumRange () --------> "+ event. sensor. getMaximumRange (); showTextView. setText ("x -->" + x + "\ ny -->" + y + "\ nz -->" + z);} else if (event. sensor. getType () = Sensor. TYPE_MAGNETIC_FIELD) {// electromagnetic intensity in the direction of the three coordinate axes, in the unit of micro-Tesla, expressed in uT, or Gaussian (Gauss ), 1 Tesla = 10000 Gauss float x = event. values [0]; float y = event. values [1]; float z = Event. values [2]; // The time interval for the mobile phone's magnetic field sensor to collect data from the outside is 10000 microseconds System. out. println ("magneticSensor. getMinDelay () --------> "+ magneticSensor. getMinDelay (); // maximum range of the magnetic sensor System. out. println ("event. sensor. getMaximumRange () -----------> "+ event. sensor. getMaximumRange (); System. out. println ("x ------------->" + x); System. out. println ("y ------------->" + y); System. out. println ("z ------------->" + z); // Log. d ("T AG "," x -------------> "+ x); // Log. d ("TAG", "y ------------>" + y); // Log. d ("TAG", "z ----------->" + z); // showTextView. setText ("x ---------->" + x + "\ ny -------------->" + // y + "\ nz ----------->" + z);} else if (event. sensor. getType () = Sensor. TYPE_GYROSCOPE) {// view the device in the original position from the forward position of the x, y, and z axes. if the device rotates counter-clockwise, it will receive a positive value. Otherwise, it is a negative value if (timestamp! = 0) {// obtain the time difference between the two detected mobile phone rotation (nanoseconds) and convert it to second final float dT = (event. timestamp-timestamp) * NS2S; // Add the Rotation angle of the mobile phone on each axis to get the arc angle of the current position relative to the initial position [0] + = event. values [0] * dT; angle [1] + = event. values [1] * dT; angle [2] + = event. values [2] * dT; // converts radians to degrees float anglex = (float) Math. toDegrees (angle [0]); float angley = (float) Math. toDegrees (angle [1]); float anglez = (float) Math. toDegrees (angle [2]); System. out. println ("anglex ------------>" + anglex); System. out. println ("angley ------------>" + angley); System. out. println ("anglez ------------>" + anglez); System. out. println ("gyroscopeSensor. getMinDelay () -----------> "+ gyroscopeSensor. getMinDelay ();} // assign the current time to timestamp = event. timestamp ;}@ Override public void onAccuracyChanged (Sensor sensor, int accuracy) {// TODO Auto-generated method stub} @ Override public void onPause () {// TODO Auto-generated method stub super. onPause (); sensorManager. unregisterListener (this );}}