service启动和停止

package com.example.servicedemoone;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.widget.Toast;

public class Myservice extends Service {

    @Override
    public IBinder onBind(Intent arg0) {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();
        Toast.makeText(this, "启动", Toast.LENGTH_SHORT).show();
    }
    @Override
    public void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        Toast.makeText(this, "停止", Toast.LENGTH_SHORT).show();
    }
}

package com.example.servicedemoone;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {
    private Button btn_start;
    private Button btn_stop;
    private Intent intent;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn_start = (Button) findViewById(R.id.btn_start);
        intent = new Intent(MainActivity.this,Myservice.class);    
        btn_start.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                startService(intent);
                
            }
        });
        findViewById(R.id.btn_stop).setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View arg0) {
                
                stopService(intent);
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}