Android 利用广播接收器启动服务

 public class MainActivity extends Activity {

     private Button bt ;
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
             bt = (Button)findViewById(R.id.bt);

             IntentFilter filter = new IntentFilter("BT");
             Receiver recerver = new Receiver();
             getApplicationContext().registerReceiver(recerver, filter);

             bt.setOnClickListener(new OnClickListener(){
                 public void onClick(View arg0) {
                     Intent intent = new Intent("BT");
                     intent.setPackage(getPackageName());
                     Bundle bundle = new Bundle();
                     bundle.putString("say",    "Hello,I'm activity!");
                     intent.putExtras(bundle);
                     sendBroadcast(intent);
                 }
             });
     }

 }

MainActivity

 public class Receiver extends BroadcastReceiver {

     public void onReceive(Context context, Intent intent) {
             String bd=intent.getStringExtra("say");
             Toast.makeText(context,bd+ "I'm Receiver.I will send Intent!!!", Toast.LENGTH_LONG).show();
             intent.setAction("myservice");
             context.startService(intent);
     }

 }

Receiver

 public class MyService extends Service {

     @Override
     public IBinder onBind(Intent arg0) {
         // TODO Auto-generated method stub
         return null;
     }

     public void onCreate(){
         Toast.makeText(MyService.this, "onCreate()", Toast.LENGTH_LONG).show();
     }
     public void onStart(Intent intent,int startId){
         Toast.makeText(MyService.this, "onStart()", Toast.LENGTH_LONG).show();

     }
     public void onDestroy(){
         Toast.makeText(MyService.this, "onDestroy()", Toast.LENGTH_LONG).show();
     }
 }

MyService

     <application
         android:allowBackup="true"
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
         android:theme="@style/AppTheme" >
         <activity
             android:name=".MainActivity"
             android:label="@string/app_name" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
         <service android:name=".MyService">
             <intent-filter >
                 <action android:name="myservice" />
             </intent-filter>
         </service>
     </application>

application