android通知Notification

通知可以在活动，内容提供器，服务，广播接收器里创建。
1、调用 Context的getSystemService(Context.NOTIFICATION_SERVICE)方NotificationManager 来对通知进行管理
2、创建Notification对象，存储通知的各种信息
3、Intent：倾向立即执行某个动作
PendingIntent :倾向某个时机去执行某个动作，延时执行
静态方法获取不同类型的请求：getActivity()，getBroadcast()，getService()
4、设定通知的布局，调用
Notification 的 setLatestEventInfo()方法
5、调用 NotificationManager 的 notify()方法显示通知

NotificationActivity

public class NotificationActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.notification_layout);        NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);        manager.cancel(1);//取消通知    }}

public class MainActivity extends Activity implements OnClickListener {    private Button sendNotice;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        sendNotice = (Button) findViewById(R.id.send_notice);        sendNotice.setOnClickListener(this);    }    @Override    public void onClick(View v) {        switch (v.getId()) {        case R.id.send_notice:            NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);            Notification notification = new Notification(                    R.drawable.ic_launcher, "This is ticker text",                    System.currentTimeMillis());            //Uri soundUri = Uri.fromFile(new File("/system/media/audio/ringtones/Basic_tone.ogg"));            //notification.sound = soundUri;            //long[] vibrates = {0, 1000, 1000, 1000};            //notification.vibrate = vibrates;//震动            //notification.ledARGB = Color.GREEN;//led灯            //notification.ledOnMS = 1000;            //notification.ledOffMS = 1000;            //notification.flags = Notification.FLAG_SHOW_LIGHTS;            notification.defaults = Notification.DEFAULT_ALL;            //想要启动NotificationActivity            Intent intent = new Intent(this, NotificationActivity.class);            //将构建好的 Intent 对象传入到 PendingIntent 的 getActivity()方法里            PendingIntent pi = PendingIntent.getActivity(this, 0, intent,                    PendingIntent.FLAG_CANCEL_CURRENT);            //布局            notification.setLatestEventInfo(this, "This is content title",                    "This is content text", pi);                    //显示通知            manager.notify(1, notification);            break;        default:            break;        }    }}

结果：