Android界面编程之Notification（通知）

NotificationManager的方法

示例：点击发送通知，通知栏由通知显示，点击取消，则消失

布局：

<Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="send"
        android:text="发送通知"/>
    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="cancel"
        app:layout_constraintTop_toBottomOf="@id/button1"
        android:text="取消发送"/>

Java代码：

public class MainActivity extends AppCompatActivity {
    private static final int NOTIVICATIONID=0x123;
    private NotificationManager manager;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        manager=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);
    }
    public void send(View view){
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
        builder.setAutoCancel(true)
                .setTicker("中午加餐啦")
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle("今天牛老板请客")
                .setContentText("牛老板请客吃烧烤")
                .setDefaults(Notification.DEFAULT_ALL);
        Notification notify = builder.build();
        manager.notify(NOTIVICATIONID,notify);
    }
    public  void  cancel(View view){
        manager.cancel(NOTIVICATIONID);
    }
}