安卓狀態欄通知Status Bar Notification，安卓notification

安卓狀態欄通知Status Bar Notification，安卓notification

安卓系統通知用戶三種方式：

1.Toast Notification

2.Dialog Notification

3.Status Bar Notification Status Bar Notification，狀態欄通知

發送一個狀態欄通知必須用到兩個類：NotificationManager，Notification

1.NotificationManager是一個系統Service，必須通過getSystemService()獲取

NotificationManager notificationManager=(NotificationManager) getSystemService(NOTIFICATION_SERVICE);

2.Notification是具體的狀態欄通知對象

調用NotificationManager的notify()方法創建Notification

兩部分：

①：狀態欄通知    

notification.icon=R.drawable.ic_launcher;     

notification.tickerText="My First Notification";     

notification.when=System.currentTimeMillis();

②：下拉通知列表和點擊跳轉：

兩種方式：

一：setLatestEventInfo()方法     

Context context = getApplicationContext();     

CharSequence contentTitle="Notification";     

CharSequence contentText="Notification Context";     

Intent intent=new Intent(Main.this,Turn.class);    

PendingIntent pendingIntent=PendingIntent.getActivity(Main.this, 0, intent, 0);     

notification.setLatestEventInfo(context, contentTitle, contentText, pendingIntent);

二：自定義通知欄

notification.flags=Notification.FLAG_AUTO_CANCEL;用戶點擊後通知自動取消

設置兩個變量contentView和contentIntent     

RemoteViews contenView=new RemoteViews(getPackageName(), R.layout.notification_layout);     

contenView.setImageViewResource(R.id.icon, R.drawable.ic_launcher);     

contenView.setTextViewText(R.id.contentText, "自定義通知");     

notification.contentView=contenView;          

Intent intent1=new Intent(Main.this,Turn.class);     

PendingIntent pendingIntent1=PendingIntent.getActivity(Main.this, 0, intent1, 0);     

notification.contentIntent=pendingIntent1;

Tips:

可能遇到的錯誤：Couldn't expand RemoteViews for:

檢查是否是RemoteViews對應的layout裡使用了它不支持的組件

檢查RemoteViews對應的layout布局文件是否有基本錯誤，例如忘記聲明寬高等