Android _ Android sensor development (acceleration sensor, magnetic field sensor, light sensor, direction sensor)

import java.util.List;

import android.app.Activity;

import android.hardware.Sensor;

import android.hardware.SensorEvent;

import android.hardware.SensorEventListener;

import android.hardware.SensorManager;

import android.os.Bundle;

import android.widget.TextView;

public class Main extends Activity implements SensorEventListener {

private TextView tvAccelerometer;

private TextView tvMagentic;

private TextView tvLight;

private TextView tvOrientation;

private TextView tvSensors;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

// Obtain the sensormanager object

SensorManager sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);

// Register an acceleration sensor

sensorManager.registerListener(this,

sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),

SensorManager.SENSOR_DELAY_FASTEST);

// Register the Magnetic Field Sensor

sensorManager.registerListener(this,

sensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD),

SensorManager.SENSOR_DELAY_FASTEST);

// Register the light sensor

sensorManager.registerListener(this,

sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT),

SensorManager.SENSOR_DELAY_FASTEST);

// Register the direction Sensor

sensorManager.registerListener(this,

sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION),

SensorManager.SENSOR_DELAY_FASTEST);

tvAccelerometer = (TextView) findViewById(R.id.tvAccelerometer);

tvMagentic = (TextView) findViewById(R.id.tvMagentic);

tvLight = (TextView) findViewById(R.id.tvLight);

tvOrientation = (TextView) findViewById(R.id.tvOrientation);

tvSensors = (TextView) findViewById(R.id.tvSensors);

// Obtain all the sensors supported by the current mobile phone

List<Sensor> sensors = sensorManager.getSensorList(Sensor.TYPE_ALL);

for (Sensor sensor : sensors) {

// Output the name of the Current Sensor

tvSensors.append(sensor.getName() + "\n");

}

}

@Override

public void onSensorChanged(SensorEvent event) {

// Use the GetType method to obtain the sensor type of the currently returned data

switch (event.sensor.getType()) {

case Sensor.TYPE_ACCELEROMETER: // Process the data returned by the accelerometer

String accelerometer = "Acceleration \ n" + "X：" + event.values[0] + "\n"

+ "Y:" + event.values[1] + "\n" + "Z:" + event.values[2]

+ "\n";

tvAccelerometer.setText(accelerometer);

break;

case Sensor.TYPE_LIGHT: // Process the data returned by the light sensor

tvLight.setText("Brightness :" + event.values[0]);

break;

case Sensor.TYPE_MAGNETIC_FIELD: // Process the data returned by the Magnetic Field Sensor

String magentic = "Magnetic field \ n" + "X：" + event.values[0] + "\n" + "Y:"

+ event.values[1] + "\n" + "Z:" + event.values[2] + "\n";

tvMagentic.setText(magentic);

break;

case Sensor.TYPE_ORIENTATION: // Process the data returned from the sensor.

String orientation = "Direction \ n" + "X：" + event.values[0] + "\n" + "Y:"

+ event.values[1] + "\n" + "Z:" + event.values[2] + "\n";

tvOrientation.setText(orientation);

break;

}

}

@Override

public void onAccuracyChanged(Sensor sensor, int accuracy) {

}

}