java - 在android中显示通知方法更改？

Question

我在 vogella 网站上找到了这个方法。他们从 main.xml 文件中按钮的 onclick 属性调用了这个方法。谁能告诉我如何更改此方法以在不调用 View 的情况下使用？

public void createNotification(View view) {

    Intent intent = new Intent(this, Home.class);
    PendingIntent pIntent = PendingIntent.getActivity(this, (int) System.currentTimeMillis(), intent, 0);

    // Build notification
    // Actions are just fake
    Notification noti = new Notification.Builder(this)
            .setContentTitle("title")
            .setContentText("content").setSmallIcon(R.drawable.original_logo)
            .setContentIntent(pIntent)
            .addAction(R.drawable.original_logo, "Call", pIntent)
            .addAction(R.drawable.original_logo, "More", pIntent)
            .addAction(R.drawable.original_logo, "And more", pIntent).build();
    NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    // hide the notification after its selected
    noti.flags |= Notification.FLAG_AUTO_CANCEL;

    notificationManager.notify(0, noti);

} 

这是我得到这个方法的地方的链接

http://www.vogella.com/tutorials/AndroidNotifications/article.html

我试过这种方法。这是我对上述方法的编辑版本

public void createNotification(String title,String content) {
    // Prepare intent which is triggered if the
    // notification is selected
    Intent intent = new Intent(this, Home.class);
    PendingIntent pIntent = PendingIntent.getActivity(this, (int) System.currentTimeMillis(), intent, 0);

    // Build notification
    // Actions are just fake
    Notification noti = new Notification.Builder(this)
            .setContentTitle(title)
            .setContentText(content).setSmallIcon(R.drawable.original_logo)`enter code here`
            .setContentIntent(pIntent)
            .addAction(R.drawable.original_logo, "Call", pIntent)
            .addAction(R.drawable.original_logo, "More", pIntent)
            .addAction(R.drawable.original_logo, "And more", pIntent).build();
    NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    // hide the notification after its selected
    noti.flags |= Notification.FLAG_AUTO_CANCEL;

    notificationManager.notify(0, noti);

}

然后我尝试调用这个编辑后的方法，如下所示。

try {

        Double inc_val = Double.parseDouble(display_incamo.getText().toString());
        Double exp_val = Double.parseDouble(display_expamo.getText().toString());
        if(inc_val<exp_val){
            createNotification("Expenses are High","Your expenses are almost higher than income");
        }else{
            createNotification("Expenses are Low","Keep it up Buddy!!!");
        }

    }catch(Exception e){
        e.printStackTrace();
    }

但是没有弹出通知。

Answer 1

试试这个:

public void createNotification(View view) {

  showNotification("hello");
} 

public void showNotification(String msg)
{
  Intent intent = new Intent(this, Home.class);
    PendingIntent pIntent = PendingIntent.getActivity(this, (int) System.currentTimeMillis(), intent, 0);

    // Build notification
    // Actions are just fake
    Notification noti = new Notification.Builder(this)
            .setContentTitle("title")
            .setContentText(msg).setSmallIcon(R.drawable.original_logo)
            .setContentIntent(pIntent)
            .addAction(R.drawable.original_logo, "Call", pIntent)
            .addAction(R.drawable.original_logo, "More", pIntent)
            .addAction(R.drawable.original_logo, "And more", pIntent).build();
    NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    // hide the notification after its selected
    noti.flags |= Notification.FLAG_AUTO_CANCEL;

    notificationManager.notify(0, noti);

}