java - 如何在android中显示一个简单的通知？

Question

如何在 Android 的通知栏中显示简单的通知？请帮助我最简单的解决方案。

Answer 1

我假设您在通知栏中询问通知。如果是这样，请尝试此代码，

private void showNotification(String eventtext, Context ctx) {



    // Set the icon, scrolling text and timestamp
    Notification notification = new Notification(R.drawable.noti_icon,
            text, System.currentTimeMillis());

    // The PendingIntent to launch our activity if the user selects this
    // notification
    PendingIntent contentIntent = PendingIntent.getActivity(ctx, 0,
            new Intent(ctx, MainActivity.class), 0);

    // Set the info for the views that show in the notification panel.
    notification.setLatestEventInfo(ctx, "Title", eventtext,
            contentIntent);

    // Send the notification.
    mNotificationManager.notify("Title", 0, notification);
}

Answer 2

这简单。在此示例中，单击按钮时会触发通知：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#A9BCF5"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:layout_gravity="center_horizontal"
        android:text="Create Notification" >
    <Button>

<LinearLayout> 


public class MainActivity extends Activity {

    Button btn;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        btn = (Button)findViewById(R.id.button1);
        btn.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

              //We get a reference to the NotificationManager
              NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

              String MyText = "Reminder";
              Notification mNotification = new Notification(R.drawable.notification_icon, MyText, System.currentTimeMillis() );
              //The three parameters are: 1. an icon, 2. a title, 3. time when the notification appears

              String MyNotificationTitle = "Medicine!";
              String MyNotificationText  = "Don't forget to take your medicine!";

              Intent MyIntent = new Intent(Intent.ACTION_VIEW);
              PendingIntent StartIntent = PendingIntent.getActivity(getApplicationContext(),0,MyIntent, PendingIntent.FLAG_CANCEL_CURRENT);
              //A PendingIntent will be fired when the notification is clicked. The FLAG_CANCEL_CURRENT flag cancels the pendingintent

              mNotification.setLatestEventInfo(getApplicationContext(), MyNotificationTitle, MyNotificationText, StartIntent);

              int NOTIFICATION_ID = 1;
              notificationManager.notify(NOTIFICATION_ID , mNotification);  
              //We are passing the notification to the NotificationManager with a unique id.
            }
        });
    }

}

您也可以在通知中添加声音或振动。有关更多信息，您可以查看本教程。