在 Android 中创建和管理通知渠道
此示例演示了如何在 Android 中创建和管理通知渠道。
步骤 1 - 在 Android Studio 中创建一个新项目,转到文件 ⇒ 新建项目,并填写所有必需的详细信息以创建新项目。
步骤 2 - 将以下代码添加到 res/layout/activity_main.xml 中。
<? xml version= "1.0" encoding= "utf-8" ?> <android.support.constraint.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" 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>
步骤 3 - 将声音添加到 raw 文件夹中。
步骤 4 - 将以下代码添加到 src/MainActivity.java 中。
package app.tutorialspoint.com.notifyme ; import android.app.NotificationChannel ; import android.app.NotificationManager ; import android.content.ContentResolver ; import android.content.Context ; import android.graphics.Color ; import android.media.AudioAttributes ; import android.net.Uri ; 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) { Uri sound = Uri. parse (ContentResolver. SCHEME_ANDROID_RESOURCE + "://" + getPackageName() + "/raw/quite_impressed.mp3" ) ; NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(MainActivity. this, default_notification_channel_id ) .setSmallIcon(R.drawable. ic_launcher_foreground ) .setContentTitle( "Test" ) .setSound(sound) .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 ) { AudioAttributes audioAttributes = new AudioAttributes.Builder() .setContentType(AudioAttributes. CONTENT_TYPE_SONIFICATION ) .setUsage(AudioAttributes. USAGE_ALARM ) .build() ; int importance = NotificationManager. IMPORTANCE_HIGH ; NotificationChannel notificationChannel = new NotificationChannel( NOTIFICATION_CHANNEL_ID , "NOTIFICATION_CHANNEL_NAME" , importance) ; notificationChannel.enableLights( true ) ; notificationChannel.setLightColor(Color. RED ) ; notificationChannel.enableVibration( true ) ; notificationChannel.setVibrationPattern( new long []{ 100 , 200 , 300 , 400 , 500 , 400 , 300 , 200 , 400 }) ; notificationChannel.setSound(sound , audioAttributes) ; mBuilder.setChannelId( NOTIFICATION_CHANNEL_ID ) ; assert mNotificationManager != null; mNotificationManager.createNotificationChannel(notificationChannel) ; } assert mNotificationManager != null; mNotificationManager.notify(( int ) System. currentTimeMillis (), mBuilder.build()) ; } }) ; } }
步骤 5 - 将以下代码添加到 androidManifest.xml 中。
<? xml version = "1.0" encoding = "utf-8" ?> <manifest xmlns: android = "http://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>
让我们尝试运行您的应用程序。我假设您已将您的实际 Android 移动设备连接到您的计算机。要从 Android Studio 运行应用程序,请打开您的一个项目活动文件,然后单击工具栏中的运行 图标。选择您的移动设备作为选项,然后检查您的移动设备,它将显示您的默认屏幕 -
点击 这里 下载项目代码。
广告