Android攻城狮Notification实现状态通知栏

通知栏的实现
需要在配置文件中添加权限：
<uses-permission android:name="android.permission.FLASHLIGHT" />
<uses-permission android:name="android.permission.VIBRATE" />

public class MainActivity extends ActionBarActivity implements OnClickListener {
    NotificationManager manager;
    int notification_ID;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragment_main);
        manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        findViewById(R.id.butsend).setOnClickListener(this);
        findViewById(R.id.butcancel).setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        switch (v.getId()) {
        case R.id.butsend:
            sendNotification();
            break;

        case R.id.butcancel:
            manager.cancel(notification_ID);
            break;

        }
    }

    // 构造Notification并发送到通知栏
    private void sendNotification() {
        Intent intent = new Intent(this, MainActivity.class);
        PendingIntent pintent = PendingIntent.getActivity(this, 0, intent, 0);
        Builder builder = new Notification.Builder(this);
        builder.setSmallIcon(R.drawable.ic_launcher);// 设置图标
        builder.setTicker("hello");// 手机状态栏的提示
        builder.setWhen(System.currentTimeMillis());// 设置时间
        builder.setContentTitle("通知栏通知");// 设置标题
        builder.setContentText("我来自，，Notification");// 设置通知内容
        builder.setContentIntent(pintent);// 点击后的意图
        // builder.setDefaults(Notification.DEFAULT_SOUND);//设置提示声音
        // builder.setDefaults(Notification.DEFAULT_LIGHTS);//指示灯 需要权限
        // builder.setDefaults(Notification.DEFAULT_VIBRATE);//震动效果 需要权限
        builder.setDefaults(Notification.DEFAULT_ALL);// 设置三种所有
        Notification notification = builder.build();// 4.1以上 包括4.1

        manager.notify(notification_ID, notification);
        // builder.getNotification();//4.1以下

    }
}