Question

我有一个非常简单的Service触发通知。但它不起作用。正如您可能看到的，所有这些都只是从网上复制过来，但我希望它在我调整之前能够正常工作。

这是从服务中调用的：

NotificationManager mNotificationManager =
        (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

String id = "my_channel_01";
CharSequence name = "someName";
String description = "even bigger name";
int importance = NotificationManager.IMPORTANCE_HIGH;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
    NotificationChannel mChannel = new NotificationChannel(id, name, importance);
    mChannel.setDescription(description);
    mChannel.enableLights(true);
    mChannel.setLightColor(Color.RED);
    mChannel.enableVibration(true);
    mChannel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});
    mNotificationManager.createNotificationChannel(mChannel);
}

NotificationCompat.Builder mBuilder =
        new NotificationCompat.Builder(getApplicationContext())
                .setSmallIcon(R.drawable.big_anchor)
                .setContentTitle("My notification")
                .setChannel(id)
                .setContentText("Hello World!");
Intent resultIntent = new Intent(getApplicationContext(), MainActivity.class);

PendingIntent resultPendingIntent =
        PendingIntent.getActivity(getApplicationContext(),
                0, resultIntent,
                PendingIntent.FLAG_UPDATE_CURRENT
        );
mBuilder.setContentIntent(resultPendingIntent);

mNotificationManager.notify(32345, mBuilder.build());

我已经读过，有些参数应该放在AndroidManifest.xml中，所以我也附上了这个：

<application
    android:name=".App"
    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"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <service android:name=".GpsService" />
</application>

此外，我收到的唯一日志是：

10-30 22:44:13.939 417-417/asdf.appW/Notification: Use of stream types is deprecated for operations other than volume control
10-30 22:44:13.940 417-417/asdf.app W/Notification: See the documentation of setSound() for what to use instead with android.media.AudioAttributes to qualify your playback use case

有什么想法吗？

更新

我想这与我正在使用的API版本有关。当我使用API 24时，一切正常。但是当使用带有26的仿真器时，什么也没有出现。

Answer 1

您必须在通知构建器构造函数中提供通道ID：

new NotificationCompat.Builder(getApplicationContext(), id)

Reference

Answer 2

我也遇到过类似的问题，NotificationCompat.Builder对我来说不适用于API 26.尝试将Notification.Builder用于API 26，将NotificationCompat.Builder用于低于26的版本。

通知未显示

2 个答案: