UI_Notification

##通知 ###示例： 示例1：

	//创建通知 的构建器对象
	NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
	
	//设置通知的相关属性
	builder.setContentTitle("通知");
	
	builder.setContentText("下雨了");
	
	//必须设置，否则程序会崩溃
	builder.setSmallIcon(R.drawable.ic_launcher);
	
	//得到通知管理对象---属于系统服务
	NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
	
	//得到通知对象
	Notification notification = builder.build();
	
	//使用通知管理对象发送通知
	manager.notify((int)System.currentTimeMillis(), notification);//如果id相同，即使发送多个通知，也只显示一个

示例2：

NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder.setContentTitle("你有短信");
builder.setContentText("你有3条短信");
builder.setSmallIcon(R.drawable.ic_launcher);
builder.setNumber(3);//设置数量
//收到通知可以 是声音，灯光，震动
//DEFAULT_VIBRATE  需要权限
builder.setDefaults(Notification.DEFAULT_VIBRATE);

Notification notification = builder.build();

NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

manager.notify(168, notification);

示例3：

NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder.setContentTitle("下载");
builder.setContentText("正在下载");
builder.setSmallIcon(R.drawable.ic_launcher);
builder.setOngoing(true);//设置不可以被删除


Notification n = builder.build();

NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

manager.notify(188, n);

示例4：

NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
	
builder.setContentTitle("你有短信")
       .setContentText("你有6条短信")
       .setSmallIcon(R.drawable.ic_launcher)
       .setNumber(6)
       .setDefaults(Notification.DEFAULT_ALL);

Intent intent = new Intent(this,MainActivity.class);

//可以当通知被点击时自动执行 startActiivty()
PendingIntent pending = PendingIntent.getActivity(this, 6, intent, PendingIntent.FLAG_CANCEL_CURRENT);

builder.setContentIntent(pending);

builder.setAutoCancel(true);//设置通知自动消失

Notification ntf = builder.build();

NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

manager.notify(88, ntf);

##Toast自定义

Toast toast = new Toast(this);
	
	View view = getLayoutInflater().inflate(R.layout.toast_layout, null);
	
	toast.setView(view);//设置吐司使用的布局
	
	toast.setGravity(Gravity.CENTER, 0,0);//设置吐司的显示位置
	
	toast.setDuration(Toast.LENGTH_SHORT);
	
	toast.show();