第三天Notification

退出应用程序

 @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        //按的是退出键
        if (keyCode==KeyEvent.KEYCODE_BACK){
            if (System.currentTimeMillis()-extime>2000){
                    extime= (int) System.currentTimeMillis();
                    return true;
            }
        }else {
            finish();
        }
        return super.onKeyDown(keyCode, event);
    }

 //分组
        private void sendMessage_myself() {
        NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        //构建构造者
            Notification.Builder mBuilder0 = new Notification.Builder(this);
            Notification.Builder mBuilder1 = new Notification.Builder(this);
            Notification.Builder mBuilder2 = new Notification.Builder(this);
            Notification.Builder mBuilder3 = new Notification.Builder(this);

            /**
             * RemoteViews是可以在别的进程（系统进程）中显示的View，并且提供了一组跨进程更新它界面的操作
             * 两个参数,第一个布局所在包名
             * 第二个是布局Id
             * 布局文件是自己创建的,随便一个线性布局,加一个textView和ImageView即可
             */
            //消息分组属性,group相同才能分到一组
            mBuilder0.setGroup("2");
            mBuilder0.setSmallIcon(R.mipmap.ic_launcher);
            //被设置setGroupSummary为true的消息会隐藏内容,其内容会显示另外分组成员信息.
            mBuilder0.setGroupSummary(true);
            mBuilder0.setContentText("11111111");
            mBuilder0.setContentTitle("222222222");

            mBuilder1.setGroup("2");
            mBuilder1.setSmallIcon(R.mipmap.ic_launcher);
//        mBuilder1.setGroupSummary(true);
            //是否隐藏
            mBuilder1.setContentText("333333");
            mBuilder1.setContentTitle("44444444");


            mBuilder2.setGroup("2");
            mBuilder2.setSmallIcon(R.mipmap.ic_launcher);
//        mBuilder2.setGroupSummary(true);
            mBuilder2.setContentText("55555555555555555");
            mBuilder2.setContentTitle("66666666666");

            mBuilder3.setGroup("2");
            mBuilder3.setSmallIcon(R.mipmap.ic_launcher);
//        mBuilder3.setGroupSummary(true);
            mBuilder3.setContentText("77777");
            mBuilder3.setContentTitle("8888888");


            manager.notify(0,mBuilder0.build());
            manager.notify(1,mBuilder1.build());
            manager.notify(2,mBuilder2.build());
            manager.notify(3,mBuilder3.build());

    }
	 //方法
        private void sendMessage(){
            //创建构造者
            Notification.Builder builder = new Notification.Builder(this);
            //设置属性   setSamllIcon该属性必须设置
            builder.setSmallIcon(R.mipmap.ic_launcher);
            builder.setContentTitle("爸爸是标题");
            builder.setContentText("爸爸是内容");
            //创建对象.发送的就是这个对象
            Notification build = builder.build();
            //管理器
            NotificationManager systemService = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            //发送通知
            //参数
            systemService.notify(1,build);

        }

这是进度条

 btn_jin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
                //构造者
                final Notification.Builder builder = new Notification.Builder(MainActivity.this);
                builder.setSmallIcon(R.mipmap.ic_launcher);//TODO 设置小图标,必要
                builder.setContentTitle("我是标题");
                //设置进度条
                //参数一 最大值 参数二：当前进度 参数三 是否模糊
                //    builder.setProgress(100,50,true);
                final Timer timer = new Timer();
                timer.schedule(new TimerTask() {
                    int progress;
                    @Override
                    public void run() {
                            builder.setContentText("正在下载,当前进度:"+progress);
                            builder.setProgress(100,progress,false);
                        progress+=10;
                        manager.notify(6,builder.build());
                        if(progress>=100){
                            //2.安装过程
                            builder.setContentText("正在安装");
                            builder.setProgress(0,0,true);//安装模糊
                            manager.notify(6,builder.build());
                            try {
                                Thread.sleep(7000);//模拟安装过程
                            } catch (InterruptedException e) {
                                e.printStackTrace();
                            }
                            //3.安装完成
                            manager.cancel(6);//取消置顶的通知
                            timer.cancel();
                        }
                    }

                },0,1000);
            }
        });

 btn_jump.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
                Notification.Builder builder = new Notification.Builder(MainActivity.this);
                    builder.setContentText("标题");
                    builder.setSmallIcon(R.mipmap.ic_launcher_round);
                Intent intent = new Intent(MainActivity.this, Main2Activity.class);
                PendingIntent intent1 = PendingIntent.getActivity(MainActivity.this, 666, intent, PendingIntent.FLAG_ONE_SHOT);
                    builder.setFullScreenIntent(intent1,true);

                    builder.setContentIntent(intent1);
                    manager.notify(9,builder.build());

            }
        });