12_Sensor简单实例

　　列出Android手机所支持的Sensor。

package com.example.sensorlist;

import java.util.List;

import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity extends Activity {

    private TextView tvSensors;
    private SensorManager sensorManager;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        tvSensors = (TextView) findViewById(R.id.tvSensors);
        sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
        
        List<Sensor> sensors = sensorManager.getSensorList(Sensor.TYPE_ALL);
        for(Sensor sensor: sensors){
            tvSensors.append(sensor.getName() + "
");
        }

    }

}

　　使用MotionSensor的简单实例。

package com.example.motionsensor;

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;

//为了获取传感器回传的数据，需要implements SensorEventListener
public class MainActivity extends Activity implements SensorEventListener {

    private TextView tvAccelermeter;
    private SensorManager sensorManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

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

        sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);

    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        // 多个传感器，要进行判断
        switch (event.sensor.getType()) {
        case Sensor.TYPE_ACCELEROMETER:
            tvAccelermeter.setText(String.format("%f %f %f", event.values[0],
                    event.values[1], event.values[2]));
            break;

        case Sensor.TYPE_GRAVITY:
            // tvAccelermeter.setText(String.format("%f %f %f", event.values[0],
            // event.values[1], event.values[2]));
            break;

        default:
            break;
        }

    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {

    }

    @Override
    protected void onResume() {
        super.onResume();

        // 注册传感器
        sensorManager.registerListener(this,
                sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
                SensorManager.SENSOR_DELAY_UI);
        sensorManager.registerListener(this,
                sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY),
                SensorManager.SENSOR_DELAY_FASTEST);
    }

    @Override
    protected void onPause() {
        super.onPause();

        sensorManager.unregisterListener(this);
    }

}