NotificationCompat.Builder দিয়ে এক্টিভিটি লঞ্চ করা
এই উদাহরণটি দেখাবে কিভাবে একটি নোটিফিকেশন তৈরি করে সেটিতে ক্লিক করলে MainActivity খুলব।
ধাপ ১: নতুন প্রজেক্ট তৈরি
Android Studio-তে File → New Project যান।
ধাপ ২: লেআউট ফাইল (res/layout/activity_main.xml)
<? xml version = "1.0" encoding = "utf-8" ?> <android.support.constraint.ConstraintLayout xmlns: android = "https://schemas.android.com/apk/res/android" xmlns: app = "https://schemas.android.com/apk/res-auto" xmlns: tools = "https://schemas.android.com/tools" android :layout_width = "match_parent" android :layout_height = "match_parent" android :padding = "16dp" tools :context = ".MainActivity" > <Button android :id = "@+id/btnCreateNotification" android :layout_width = "0dp" android :layout_height = "wrap_content" android :text = "Create notification" app :layout_constraintBottom_toBottomOf = "parent" app :layout_constraintEnd_toEndOf = "parent" app :layout_constraintStart_toStartOf = "parent" app :layout_constraintTop_toTopOf = "parent" /> </android.support.constraint.ConstraintLayout>
ধাপ ৩: MainActivity.java (src/MainActivity.java)
package app.tutorialspoint.com.notifyme ; import android.app.NotificationChannel ; import android.app.NotificationManager ; import android.app.PendingIntent ; import android.content.Context ; import android.content.Intent ; import android.support.v4.app.NotificationCompat ; import android.support.v7.app.AppCompatActivity ; import android.os.Bundle ; import android.view.View ; import android.widget.Button ; public class MainActivity extends AppCompatActivity { public static final String NOTIFICATION_CHANNEL_ID = "10001" ; private final static String default_notification_channel_id = "default" ; @Override protected void onCreate (Bundle savedInstanceState) { super .onCreate(savedInstanceState) ; setContentView(R.layout. activity_main ) ; Button btnCreateNotification = findViewById(R.id. btnCreateNotification ) ; btnCreateNotification.setOnClickListener( new View.OnClickListener() { @Override public void onClick (View v) { Intent intent = new Intent(MainActivity. this, MainActivity. class ) ; PendingIntent contentIntent = PendingIntent. getActivity (MainActivity. this, 0 , intent , PendingIntent. FLAG_UPDATE_CURRENT ) ; NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(MainActivity. this, default_notification_channel_id ) .setSmallIcon(R.drawable. ic_launcher_foreground ) .setContentIntent(contentIntent) .setContentTitle( "Test" ) .setContentText( "Hello! This is my first push notification" ); NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context. NOTIFICATION_SERVICE ); if (android.os.Build.VERSION. SDK_INT >= android.os.Build.VERSION_CODES. O ) { int importance = NotificationManager. IMPORTANCE_HIGH ; NotificationChannel notificationChannel = new NotificationChannel( NOTIFICATION_CHANNEL_ID , "NOTIFICATION_CHANNEL_NAME" , importance) ; mBuilder.setChannelId( NOTIFICATION_CHANNEL_ID ) ; assert mNotificationManager != null; mNotificationManager.createNotificationChannel(notificationChannel) ; } assert mNotificationManager != null; mNotificationManager.notify(( int ) System. currentTimeMillis () , mBuilder.build()) ; } }) ; } }
ধাপ ৪: AndroidManifest.xml
<? xml version = "1.0" encoding = "utf-8" ?> <manifest xmlns: android = "https://schemas.android.com/apk/res/android" package = "app.tutorialspoint.com.notifyme" > <application android :allowBackup = "true" android :icon = "@mipmap/ic_launcher" android :label = "@string/app_name" android :roundIcon = "@mipmap/ic_launcher_round" android :supportsRtl = "true" android :theme = "@style/AppTheme" > <activity android :name = ".MainActivity" > <intent-filter> <action android :name = "android.intent.action.MAIN" /> <category android :name = "android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
অ্যাপ্লিকেশন চালান
ডিভাইস সংযুক্ত থাকলে Run আইকনে ক্লিক করুন। "Create notification" বাটনে ক্লিক করলে নোটিফিকেশন আসবে। সেটিতে ক্লিক করলে অ্যাপ খুলবে।
