Android传感器的使用（方向传感器，重力传感器）
package cn.itcast.sensor;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 MainActivity extends Activity { private TextView accelerometerView; private TextView orientationView; private SensorManager sensorManager; private MySensorEventListener sensorEventListener; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); sensorEventListener = new MySensorEventListener(); accelerometerView = (TextView) this.findViewById(R.id.accelerometerView); orientationView = (TextView) this.findViewById(R.id.orientationView); //获取感应器管理器 sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE); }@Overrideprotected void onResume() {Sensor orientationSensor = sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);sensorManager.registerListener(sensorEventListener, orientationSensor, SensorManager.SENSOR_DELAY_NORMAL);Sensor accelerometerSensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);sensorManager.registerListener(sensorEventListener, accelerometerSensor, SensorManager.SENSOR_DELAY_NORMAL);super.onResume();}private final class MySensorEventListener implements SensorEventListener{@Overridepublic void onSensorChanged(SensorEvent event) {//可以得到传感器实时测量出来的变化值if(event.sensor.getType()==Sensor.TYPE_ORIENTATION){float x = event.values[SensorManager.DATA_X]; float y = event.values[SensorManager.DATA_Y]; float z = event.values[SensorManager.DATA_Z]; orientationView.setText("Orientation: " + x + ", " + y + ", " + z); }else if(event.sensor.getType()==Sensor.TYPE_ACCELEROMETER){float x = event.values[SensorManager.DATA_X]; float y = event.values[SensorManager.DATA_Y]; float z = event.values[SensorManager.DATA_Z]; accelerometerView.setText("Accelerometer: " + x + ", " + y + ", " + z); }}@Overridepublic void onAccuracyChanged(Sensor sensor, int accuracy) {}}@Overrideprotected void onPause() {sensorManager.unregisterListener(sensorEventListener);super.onPause();} }