kingjinho

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <androidx.appcompat.widget.AppCompatButton
        android:id="@+id/btn_display_basic_notification"

kingjinho

package com.example.pushnotificaiton.utils.push

/**
 * Created by KING JINHO on 2020-06-23
 */
class NotificationBuilder {


    companion object {
        private lateinit var CHANNEL_ID: String

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class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        ...
        
        btn_display_basic_notification.setOnClickListener {
            NotificationBuilder.from(this)
                .createNotificationBuilder("HelloWorld")
                .setTitle(R.string.app_name)
                .setContent(R.string.app_name)
                .setSmallIcon(R.drawable.ic_baseline_add_circle_24)

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public static class Builder {
       ...
       ...
  
        CharSequence mContentTitle;
        CharSequence mContentText;
        PendingIntent mContentIntent;
        PendingIntent mFullScreenIntent;
        RemoteViews mTickerView;
        Bitmap mLargeIcon;

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 fun setSmallIcon(smallIconRes: Int): NotificationBuilder {
        mNotificationBuilder.setSmallIcon(smallIconRes)
        return this
    }

    fun setTitle(titleRes: Int): NotificationBuilder {
        mNotificationBuilder.setContentTitle(CONTEXT.getString(titleRes))
        return this
    }

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fun notifyUser(num : Int) {
        mNotificationManagerCompat = NotificationManagerCompat.from(CONTEXT)
        //id: unique in your app. otherwise, it will update to new one
        mNotificationManagerCompat.notify(num, mNotificationBuilder.build())
    }

kingjinho

/**
 * Compatibility library for NotificationManager with fallbacks for older platforms.
 *
 * <p>To use this class, call the static function {@link #from} to get a
 * {@link NotificationManagerCompat} object, and then call one of its
 * methods to post or cancel notifications.
 */
public final class NotificationManagerCompat {
    private static final String TAG = "NotifManCompat";
    private static final String CHECK_OP_NO_THROW = "checkOpNoThrow";

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private NotificationManagerCompat(Context context) {
 mContext = context;
 mNotificationManager = (NotificationManager) mContext.getSystemService(
 Context.NOTIFICATION_SERVICE);
}

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 fun setLargeIcon(largeIconRes: Int): NotificationBuilder {
        val bitmap = BitmapFactory.decodeResource(CONTEXT.resources, largeIconRes)
        mNotificationBuilder.setLargeIcon(bitmap)
        return this
    }

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 fun setBlockOfText(blockOfText: String): NotificationBuilder {
        mNotificationBuilder.setStyle(
            NotificationCompat.BigTextStyle()
                //.setBigContentTitle("this is big content title") overrides setContentTitle()
                //.setSummaryText("this is summary text")  right next to app name
                .bigText(blockOfText)
        )
        return this
    }