Android傳感器（加速度傳感器，磁場傳感器，光線傳感器，方向傳感器）

package mobile.android.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);
    // 獲得SensorManager對象
    SensorManager sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);

    // 注冊加速度傳感器
    sensorManager.registerListener(this,
            sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
            SensorManager.SENSOR_DELAY_FASTEST);

    // 注冊磁場傳感器
    sensorManager.registerListener(this,
            sensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD),
            SensorManager.SENSOR_DELAY_FASTEST);

    // 注冊光線傳感器
    sensorManager.registerListener(this,
            sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT),
            SensorManager.SENSOR_DELAY_FASTEST);

    // 注冊方向傳感器
    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);

    // 獲得當前手機支持的所有傳感器
    List<Sensor> sensors = sensorManager.getSensorList(Sensor.TYPE_ALL);
    for (Sensor sensor : sensors) {
        // 輸出當前傳感器的名稱
        tvSensors.append(sensor.getName() + "\n");
    }
}

@Override
public void onSensorChanged(SensorEvent event) {
    // 通過getType方法獲得當前傳回數據的傳感器類型
    switch (event.sensor.getType()) {
    case Sensor.TYPE_ACCELEROMETER: // 處理加速度傳感器傳回的數據
        String accelerometer = "加速度\n" + "X：" + event.values[0] + "\n"
                + "Y:" + event.values[1] + "\n" + "Z:" + event.values[2]
                + "\n";
        tvAccelerometer.setText(accelerometer);
        break;
    case Sensor.TYPE_LIGHT: // 處理光線傳感器傳回的數據
        tvLight.setText("亮度：" + event.values[0]);
        break;
    case Sensor.TYPE_MAGNETIC_FIELD: // 處理磁場傳感器傳回的數據
        String magentic = "磁場\n" + "X：" + event.values[0] + "\n" + "Y:"
                + event.values[1] + "\n" + "Z:" + event.values[2] + "\n";
        tvMagentic.setText(magentic);
        break;
    case Sensor.TYPE_ORIENTATION: // 處理方向傳感器傳回的數據
        String orientation = "方向\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) {
}

}</pre>