如何播放安卓通知声音?
该示例展示如何在 Android 中播放铃声/警报/通知声音。
步骤 1 − 在 Android Studio 中新建一个项目,转到文件 ⇒ 新建项目,然后填写所需详细信息来新建一个项目。
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 − 将以下代码添加到 src/MainActivity.java 中
package app.tutorialspoint.com.notifyme; import android.app.NotificationManager; import android.content.Context; import android.media.MediaPlayer; import android.media.RingtoneManager; 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; import java.util.Objects; public class MainActivity extends AppCompatActivity { 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 alarmSound = RingtoneManager. getDefaultUri (RingtoneManager. TYPE_NOTIFICATION ); MediaPlayer mp = MediaPlayer. create (getApplicationContext(), alarmSound); mp.start(); NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(MainActivity.this, default_notification_channel_id ) .setSmallIcon(R.drawable. ic_launcher_foreground ) .setContentTitle( "Test" ) .setContentText( "Hello! This is my first push notification" ); NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context. NOTIFICATION_SERVICE ); mNotificationManager.notify(( int ) System. currentTimeMillis (), mBuilder.build()) ; } }); } }
步骤 4 − 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" > <uses-permission android :name= "android.permission.VIBRATE" /> <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> <service android :name= ".MyFirebaseMessagingService" android :exported= "false" > <intent-filter> <action android :name= "com.google.firebase.MESSAGING_EVENT" /> </intent-filter> </service> </application> </manifest>
我们来尝试运行应用程序。我假设你已将你的 Android 移动设备连接到电脑。要从 Android Studio 运行应用程序,请打开你的一个项目活动文件,然后单击工具栏中的运行 图标。选择你的移动设备作为选项,然后检查你的移动设备,它会显示你的默认屏幕 –
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