如何在弹出通知时播放声音

Question

我正在开发一个应用程序，使用两个开关按钮，用户可以打开/关闭通知和通知声音。我创建了弹出在状态栏上的通知，我想在它们出现时播放默认声音。我写了以下代码，但似乎不起作用。关于如何让通知声音播放，有什么想法吗？

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.NotificationManagerCompat;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.CompoundButton;
import android.widget.Switch;
import java.util.Set;
import androidx.annotation.RequiresApi;
import static android.app.PendingIntent.getActivity;
import static android.content.Context.NOTIFICATION_SERVICE;
import static com.example.myevents.R.drawable.notification;

public class Settings extends AppCompatActivity {
Switch simpleswitch1;
Switch simpleswitch2;
private Notification notification;
NotificationManager manager;
Notification myNotication;
boolean enableSound = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings);

simpleswitch1 = (Switch) findViewById(R.id.simpleswitch1);
simpleswitch2 = (Switch) findViewById(R.id.simpleswitch2);
simpleswitch1.setChecked(false);
simpleswitch2.setChecked(false);
simpleswitch1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@TargetApi(Build.VERSION_CODES.P)
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
int notifyID = 1;
String CHANNEL_SOUND_ID = "channel SOUND";// The id of the channel.
CharSequence NAME_SOUND = "channel 1";// The user-visible name of the channel.
String CHANNEL_SILENT_ID = "channel SILENT";// The id of the channel.
CharSequence NAME_SILENT = "channel 2";// The user-visible name of the channel.
int importance_sound = NotificationManager.IMPORTANCE_HIGH;
int importance_silent = NotificationManager.IMPORTANCE_LOW;
NotificationChannel mChannel_sound = new NotificationChannel(CHANNEL_SOUND_ID, NAME_SOUND, importance_sound);
NotificationChannel mChannel_silent = new NotificationChannel(CHANNEL_SILENT_ID, NAME_SILENT, importance_silent);
// Crete both notification channels
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.createNotificationChannel(mChannel_sound);
mNotificationManager.createNotificationChannel(mChannel_silent);
Intent intent = new Intent(Settings.this, Visitor.class);
intent.putExtra("yourpackage.notifyId", notifyID);
PendingIntent pIntent = PendingIntent.getActivity(Settings.this, 0, intent,
PendingIntent.FLAG_UPDATE_CURRENT);

// Select the correct notification channel
String selectedChannelId;
if (enableSound) {
selectedChannelId = CHANNEL_SOUND_ID;
} else {
selectedChannelId = CHANNEL_SILENT_ID;
}
// Create a notification and set the notification channel.
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(Settings.this, selectedChannelId);
notificationBuilder.setSmallIcon(R.drawable.cheers);
notificationBuilder.setContentTitle("Title");
notificationBuilder.setContentText("Notification");
notificationBuilder.setContentIntent(pIntent);
notificationBuilder.setChannelId(selectedChannelId);
Notification notification = notificationBuilder.build();

// Issue the notification.
mNotificationManager.notify(notifyID, notification);
}}});
simpleswitch2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
enableSound = isChecked;
}
});



}}

Answer 1

您应该定义一个标志来打开/关闭声音。这可以是由第二个开关控制的布尔值。然后在创建通知时检查该标志的状态，并决定是否设置声音。

并且可能将Notification与NotificationBuilder分开以控制声音。

1-创建作为类属性的标志

Switch simpleswitch1;
Switch simpleswitch2;
private Notification notification;
NotificationManager manager;
Notification myNotication;
// Sound disabled by default
boolean enableSound = false;

2-用第二个开关控制标志

simpleswitch2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
enableSound = isChecked;
}
});

3-使用NotificationBuilder控制声音。更换第一个交换机的这段代码

NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(Settings.this, CHANNEL_ID);
notificationBuilder.setSmallIcon(R.drawable.notification);
notificationBuilder.setContentTitle("NOTIFICATION TITLE");
notificationBuilder.setContentText("You have a new notification");
notificationBuilder.setChannelId(CHANNEL_ID);
if (enableSound){
notificationBuilder.setSound(android.provider.Settings.System.DEFAULT_NOTIFICATION_URI);
notificationBuilder.setVibrate(new long[]{1000,100});
}
Notification notification = notificationBuilder.build();

我希望它能有所帮助！

更新

我想我知道为什么它没有播放声音。我刚刚创建了一个新的Android Studio项目，并复制粘贴你的代码，通知被触发，声音播放，我无法关闭声音(只有oppositite(。我猜您的问题与通知通道有关。然后我修改了我的应用程序，它工作了！

首先，让我自我纠正。自api级别26(根据@TargetApi(Build.VERSION_CODES.O)使用(以来，PRIORITY一直被弃用，而应该使用的是NotificationChannel中的IMPORTANCE。通知频道的问题是，创建后无法编辑它(除非卸载应用程序(。因此，如果一开始使用低重要性通道，然后将其更改为高通道，则不会产生任何效果。

因此，你真正需要的是两个通知通道：一个有声音，一个无声，然后在之前创建的标志的帮助下选择合适的通道。

所以现在，第一个开关的代码是：注意，我重新安排了它，所以我首先创建了NotificationChannel(为了更好的可读性(

if (isChecked){
int notifyID = 1;
String CHANNEL_SOUND_ID = "channel SOUND";// The id of the channel.
CharSequence NAME_SOUND = "channel 1";// The user-visible name of the channel.
String CHANNEL_SILENT_ID = "channel SILENT";// The id of the channel.
CharSequence NAME_SILENT = "channel 2";// The user-visible name of the channel.
int importance_sound = NotificationManager.IMPORTANCE_HIGH;
int importance_silent = NotificationManager.IMPORTANCE_LOW;
NotificationChannel mChannel_sound = new NotificationChannel(CHANNEL_SOUND_ID, NAME_SOUND, importance_sound);
NotificationChannel mChannel_silent = new NotificationChannel(CHANNEL_SILENT_ID, NAME_SILENT, importance_silent);
// Crete both notification channels
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.createNotificationChannel(mChannel_sound);
mNotificationManager.createNotificationChannel(mChannel_silent);
Intent intent = new Intent(Settings.this, Visitor.class);
intent.putExtra("yourpackage.notifyId", notifyID);
PendingIntent pIntent = PendingIntent.getActivity(Settings.this, 0, intent,
PendingIntent.FLAG_UPDATE_CURRENT);

// Select the correct notification channel
String selectedChannelId;
if (enableSound){
selectedChannelId = CHANNEL_SOUND_ID;
}else{
selectedChannelId = CHANNEL_SILENT_ID;
}
// Create a notification and set the notification channel.
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(Settings.this, selectedChannelId);
notificationBuilder.setSmallIcon(R.drawable.notification);
notificationBuilder.setContentTitle("Title");
notificationBuilder.setContentText("Notification Text");
notificationBuilder.setContentIntent(pIntent);
notificationBuilder.setChannelId(selectedChannelId);
Notification notification = notificationBuilder.build();

// Issue the notification.
mNotificationManager.notify(notifyID , notification);
}