Oreo 8.0如何设置通知的声音和振动？答案

【问题标题】：How set Sound and Vibration for Notification in Oreo 8.0?Oreo 8.0如何设置通知的声音和振动？
【发布时间】：2018-08-18 06:45:38
【问题描述】：

我看到了一个在 Android 8 中创建通知的 youtube 教程，我唯一不明白的是如何使通知发出声音和振动。

这是教程中的代码，我在频道中添加了该代码。其次，channel.enable振动，.setvibrate和setSound。

频道的帮助类：

public class App extends Application {
public static final String CHANNEL_1_ID = "channel1";
public static final String CHANNEL_2_ID = "channel2";

@Override
public void onCreate() {
    super.onCreate();

    createNotificationChannels();
}

private void createNotificationChannels() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel channel1 = new NotificationChannel(
                CHANNEL_1_ID,
                "Channel 1",
                NotificationManager.IMPORTANCE_HIGH
        );
        channel1.setDescription("This is Channel 1");
        channel1.setSound(null, null);
        channel1.setLockscreenVisibility(NotificationCompat.PRIORITY_HIGH);
        channel1.enableVibration(true);

        NotificationChannel channel2 = new NotificationChannel(
                CHANNEL_2_ID,
                "Channel 2",
                NotificationManager.IMPORTANCE_LOW
        );
        channel2.setDescription("This is Channel 2");
        channel2.setSound(null, null);
        channel2.setLockscreenVisibility(NotificationCompat.PRIORITY_HIGH);
        channel2.enableVibration(true);

        NotificationManager manager = getSystemService(NotificationManager.class);
        manager.createNotificationChannel(channel1);
        manager.createNotificationChannel(channel2);
    }
}

}

主要活动：

public class MainActivity extends AppCompatActivity {
private NotificationManagerCompat notificationManager;
private EditText editTextTitle;
private EditText editTextMessage;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    notificationManager = NotificationManagerCompat.from(this);

    editTextTitle = findViewById(R.id.edit_text_title);
    editTextMessage = findViewById(R.id.edit_text_message);
}

public void sendOnChannel1(View v) {
    String title = editTextTitle.getText().toString();
    String message = editTextMessage.getText().toString();

    Notification notification = new NotificationCompat.Builder(this, CHANNEL_1_ID)
            .setSmallIcon(R.drawable.ic_one)
            .setContentTitle(title)
            .setContentText(message)
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .setCategory(NotificationCompat.CATEGORY_MESSAGE)
            .setVibrate(new long[] {2000})
            .setSound(Settings.System.DEFAULT_NOTIFICATION_URI)
            .build();

    notificationManager.notify(1, notification);
}

public void sendOnChannel2(View v) {
    String title = editTextTitle.getText().toString();
    String message = editTextMessage.getText().toString();

    Notification notification = new NotificationCompat.Builder(this, CHANNEL_2_ID)
            .setSmallIcon(R.drawable.ic_two)
            .setContentTitle(title)
            .setContentText(message)
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .setVibrate(new long[] {2000})
            .setSound(Settings.System.DEFAULT_NOTIFICATION_URI)
            .build();

    notificationManager.notify(2, notification);
 }

}

在清单中，我添加了

<uses-permission android:name="android.permission.VIBRATE"/>

我可以在按钮单击时创建通知，但没有声音和振动。有人可以向我解释一下这在 Android 8 中是如何工作的

【问题讨论】：

标签： android android-notifications android-8.0-oreo android-8.1-oreo

【解决方案1】：

您需要将VibrationPattern 设置为您的NotificationChannel

试试这个

private void createNotificationChannels() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel channel1 = new NotificationChannel(
                CHANNEL_1_ID,
                "Channel 1",
                NotificationManager.IMPORTANCE_HIGH
        );
        channel1.setDescription("This is Channel 1");
        channel1.setSound(null, null);
        channel1.setLockscreenVisibility(NotificationCompat.PRIORITY_HIGH);
        channel1.setVibrationPattern(new long[] {2000});
        channel1.enableVibration(true);

        NotificationChannel channel2 = new NotificationChannel(
                CHANNEL_2_ID,
                "Channel 2",
                NotificationManager.IMPORTANCE_LOW
        );
        channel2.setDescription("This is Channel 2");
        channel2.setSound(null, null);
        channel2.setLockscreenVisibility(NotificationCompat.PRIORITY_HIGH);
        channel2.setVibrationPattern(new long[] {2000});
        channel2.enableVibration(true);

        NotificationManager manager = getSystemService(NotificationManager.class);
        manager.createNotificationChannel(channel1);
        manager.createNotificationChannel(channel2);
    }
}

【讨论】：

试过了但还是不行，在我的智能手机和智能手表上安装了这个应用程序，我收到了通知，但没有振动或声音。

【解决方案2】：

关于缺乏振动：您的振动模式只是一个整数。

 .setVibrate(new long[] {2000})

振动器的模式规格是{offtime, ontime, offtime, ontime, offtime, ...}。

是的 - 出于某种奇怪的原因，offtime 出现在第一个，所以在您的模式中，您指定的只是 2000 毫秒的静音。所以即使模式播放正确，你也不会知道！

将您的模式设置为至少两个整数。

【讨论】：

【解决方案3】：

您可以使用以下代码：

NotificationChannel NCH1 = new NotificationChannel(CHANNEL_1,"channel1", NotificationManager.IMPORTANCE_LOW);

【讨论】：