如何在安卓中播放鈴聲/鬧鐘/通知聲音?
本文件介紹如何如何在安卓中播放鈴聲/鬧鐘/通知聲音。
步驟 1 − 在 Android Studio 中建立一個新專案,轉至檔案 ⇒ 新專案,並填寫所有必需的資訊以建立新專案。
步驟 2 − 將以下程式碼新增到 res/layout/activity_main.xml。
<? 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>
步驟 3 − 將以下程式碼新增到 src/MainActivity.java
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());
}
});
}
}步驟 4 − 將以下程式碼新增到 androidManifest.xml
<? 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>
讓我們試著執行你的應用程式。我假設你已將實際的安卓移動裝置連線到你的計算機。要從安卓工作室執行應用,開啟你的一個專案活動檔案,並單擊工具欄中的執行
圖示。以選項的形式選擇你的移動裝置,然後檢查你的移動裝置,它將顯示你的預設螢幕 –

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