MainActivity.java

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package com.example.android.basicnotifications;
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import android.app.Activity;
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import android.app.NotificationManager;
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import android.app.PendingIntent;
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import android.content.Intent;
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import android.graphics.BitmapFactory;
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import android.net.Uri;
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import android.os.Bundle;
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import android.support.v4.app.NotificationCompat;
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import android.view.View;
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/**
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 * The entry point to the BasicNotification sample.
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 */
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public class MainActivity extends Activity {
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    /**
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     * A numeric value that identifies the notification that we'll be sending.
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     * This value needs to be unique within this app, but it doesn't need to be
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     * unique system-wide.
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     */
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    public static final int NOTIFICATION_ID = 1;
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    public void onCreate(Bundle savedInstanceState) {
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        super.onCreate(savedInstanceState);
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        setContentView(R.layout.sample_layout);
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    }
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    /**
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     * Send a sample notification using the NotificationCompat API.
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     */
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    public void sendNotification(View view) {
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        /** Create an intent that will be fired when the user clicks the notification.
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         * The intent needs to be packaged into a {@link android.app.PendingIntent} so that the
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         * notification service can fire it on our behalf.
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         */
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        Intent intent = new Intent(Intent.ACTION_VIEW,
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                Uri.parse("/~mgoodman/developer.android.com/reference/android/app/Notification.html"));
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        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
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        /**
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         * Use NotificationCompat.Builder to set up our notification.
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         */
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        NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
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        /** Set the icon that will appear in the notification bar. This icon also appears
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         * in the lower right hand corner of the notification itself.
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         *
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         * Important note: although you can use any drawable as the small icon, Android
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         * design guidelines state that the icon should be simple and monochrome. Full-color
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         * bitmaps or busy images don't render well on smaller screens and can end up
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         * confusing the user.
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         */
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        builder.setSmallIcon(R.drawable.ic_stat_notification);
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        // Set the intent that will fire when the user taps the notification.
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        builder.setContentIntent(pendingIntent);
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        // Set the notification to auto-cancel. This means that the notification will disappear
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        // after the user taps it, rather than remaining until it's explicitly dismissed.
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        builder.setAutoCancel(true);
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        /**
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         *Build the notification's appearance.
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         * Set the large icon, which appears on the left of the notification. In this
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         * sample we'll set the large icon to be the same as our app icon. The app icon is a
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         * reasonable default if you don't have anything more compelling to use as an icon.
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         */
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        builder.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher));
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        /**
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         * Set the text of the notification. This sample sets the three most commononly used
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         * text areas:
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         * 1. The content title, which appears in large type at the top of the notification
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         * 2. The content text, which appears in smaller text below the title
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         * 3. The subtext, which appears under the text on newer devices. Devices running
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         *    versions of Android prior to 4.2 will ignore this field, so don't use it for
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         *    anything vital!
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         */
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        builder.setContentTitle("BasicNotifications Sample");
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        builder.setContentText("Time to learn about notifications!");
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        builder.setSubText("Tap to view documentation about notifications.");
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        /**
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         * Send the notification. This will immediately display the notification icon in the
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         * notification bar.
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         */
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        NotificationManager notificationManager = (NotificationManager) getSystemService(
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                NOTIFICATION_SERVICE);
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        notificationManager.notify(NOTIFICATION_ID, builder.build());
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    }
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}