Question

我在vogella网站上找到了这种方法。他们从main.xml文件中按钮的onclick属性调用此方法。任何人都可以告诉，如何在不调用View的情况下更改此方法？

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);

}

这是我获得此方法的地方的链接

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

我试过这种方式。这是我上面方法的编辑版本

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);

}

然后我尝试将此编辑后的方法调用如下。

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();
    }

但是通知不会弹出。

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);

}

Answer 2

好的，据我所知，您不希望有一个以View为参数的方法，我查看了Vogella处的代码，

我可以告诉你的是这个教程是为了学习而做的，所以作者希望你能够了解通知是如何以及何时制作的，所以他做了一个clickListner事件，听取了提到的按钮点击在属性(android:onClick="createNotification")

中

<Button
    android:id="@+id/button1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:onClick="createNotification"
    android:text="Create Notification" >
</Button>

这就是为什么你的活动中有一个方法，要求你以View作为参数来运行代码。

你可以通过让你的按钮引用彻底的代码来轻松改变这一点。像这样，你可以删除android:onClick="createNotification"

Button my_button = (Button)findViewById(R.id.button1);
my_button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // Now call any method which you want here or
            makeNotification();
        }
    });

makeNotification(){

 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);

}

在Android中显示通知方法更改？

2 个答案: