Question

您好我是Android新手，我正在尝试创建Notification.Builder通知，但我失败了。启动通知时出现错误

public class CardImagePanel extends JPanel {

    BufferedImage cardImage;

    public CardImagePanel() {
        this.setBorder(BorderFactory.createLineBorder(Color.black));

        try {
            cardImage = ImageIO.read(new File("c:\\dev\\cards\\2_of_clubs.png"));
        } catch (IOException ex) {
            System.out.println("Exception trying to load image file.");
        }
    }

    @Override
    public Dimension getPreferredSize() {
        return cardImage != null ? new Dimension(cardImage.getWidth(), cardImage.getHeight()) : super.getPreferredSize();
    }

    @Override
    public Dimension getMinimumSize() {
        return getPreferredSize();
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);

        g.drawImage(cardImage, 0, 0, this);
    }
}

我已下载API'S 16 17 18 19 23，这就是所有代码：

nm.notify(IDNOTIFICACIONUNO,notif); // Error in notif

我也是图书馆。谢谢你的帮助

Answer 1

在notif.setSmallIcon（R.drawable.tree）之后有一个`characheter; 删除该charachter并运行代码。

Answer 2

final NotificationManager nm =（NotificationManager）getSystemService（Context.NOTIFICATION_SERVICE）;

    //Connect to the button
    Button iconBtn = (Button) findViewById(R.id.btn_icon);
    //Set the button on click listener
    iconBtn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {

            Intent notificationIntent = new Intent(getApplicationContext(), MainActivity.class);
            PendingIntent contentIntent = PendingIntent.getActivity(MainActivity.this, 0, notificationIntent, 0);

            NotificationCompat.Builder builder = new NotificationCompat.Builder(MainActivity.this);
            Notification notification = builder.setContentIntent(contentIntent).setTicker("This is a notification marquee")
                    .setSmallIcon(R.drawable.ic_launcher).setWhen(System.currentTimeMillis())
                    .setAutoCancel(true).setContentTitle("Message Title")
                    .setContentText("Message Content").build();

            //Show the notification
            nm.notify(1, notification);
        }

    });

Notification中的Notification.Builder出错

2 个答案: