android – 用于控制接近传感器的后台服务

我需要运行一个服务（总是在后台，我希望服务不断检查，即使应用程序已经关闭），它控制接近传感器的状态，当它被覆盖时启动活动.我试过，但我错了.有这样的例子吗？

附：在我的AndroidManifest中间，我加了:

android:name="xxx.xxxxx.xxxxx.MyService"

android:enabled="true" />

在这里，我的MyService.java ? Eclipse不会报告任何错误，但当我在我的设备上尝试时，应用程序会关闭力.)

import android.app.Service;

import android.content.Intent;

import android.hardware.Sensor;

import android.hardware.SensorEvent;

import android.hardware.SensorEventListener;

import android.hardware.SensorManager;

import android.os.IBinder;

import android.widget.Toast;

public class MyService extends Service implements SensorEventListener {

Sensor proxSensor;

SensorManager sm;

@Override

public IBinder onBind(Intent intent) {

return null;

}

@Override

public void onCreate() {

Toast.makeText(this, "Service Created", Toast.LENGTH_LONG).show();

sm=(SensorManager)getSystemService(SENSOR_SERVICE);

proxSensor=sm.getDefaultSensor(Sensor.TYPE_PROXIMITY);

sm.registerListener(this, proxSensor, SensorManager.SENSOR_DELAY_NORMAL);

}

@Override

public void onAccuracyChanged(Sensor sensor, int accuracy) {

// TODO Auto-generated method stub

}

@Override

public void onSensorChanged(SensorEvent event) {

// TODO Auto-generated method stub

Intent panel = new Intent(this, Panel.class);

startActivity(panel);

}

@Override

public void onDestroy() {

Toast.makeText(this, "Service Stopped", Toast.LENGTH_LONG).show();

}

@Override

public void onStart(Intent intent, int startid) {

Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();

}

}

在这里我的Main.java：

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import com.lino99.smartTask.R;

public class Main extends Activity implements OnClickListener {

Button buttonStart, buttonStop;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

buttonStart = (Button) findViewById(R.id.buttonStart);

buttonStop = (Button) findViewById(R.id.buttonStop);

buttonStart.setOnClickListener(this);

buttonStop.setOnClickListener(this);

}

public void onClick(View src) {

switch (src.getId()) {

case R.id.buttonStart:

startService(new Intent(this, MyService.class));

break;

case R.id.buttonStop:

stopService(new Intent(this, MyService.class));

break;

}

}

}