在Android 8.0(API 26)上,Firebase SDK 11.8.0存在一个bug,导致状态栏中显示的是白色版本的应用启动图标而非通知图标。
有些人通过重写Application类的getResources()方法来解决这个问题。
我使用的另一种方法是使用HTTP POST请求将通知作为数据消息发送:
https://fcm.googleapis.com/fcm/send
Content-Type:application/json
Authorization:key=AIzaSyZ-1u...0GBYzPu7Udno5aA
{
"to": "/topics/test",
"data": {
"title": "Update",
"body": "New feature available"
}
}
然后,通过子类化 FirebaseMessagingService,以编程方式显示通知:
public class MyFirebaseMessagingService extends FirebaseMessagingService {
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
Intent i = new Intent(context, HomeActivity.class);
PendingIntent pi = PendingIntent.getActivity(this, 0, i,
PendingIntent.FLAG_ONE_SHOT);
NotificationCompat.Builder builder =
new NotificationCompat.Builder(this, GENERAL_CHANNEL_ID)
.setSmallIcon(R.drawable.ic_stat_chameleon)
.setContentTitle(remoteMessage.getData().get("title"))
.setContentText(remoteMessage.getData().get("body"))
.setContentIntent(pi);
NotificationManager manager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(0, builder.build());
}
}
AndroidManifest.xml
中删除<meta-data>
标签。.setSmallIcon(int icon, int level)
,它接受图标作为必需参数和级别参数作为可选参数。注意: .setSmallIcon
接受可绘制对象,不接受mipmap。
根据Android 8.0 Oreo Notification Channels和行为更改,应该是这样的:
public class MainActivity extends AppCompatActivity {
private CharSequence name;
private int notifyId;
private int importance;
private String id;
private String description;
private Notification mNotification;
private NotificationManager mNotificationManager;
private NotificationChannel mChannel;
private PendingIntent mPendingIntent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
binding.btnNotification.setOnClickListener(v -> notification());
}
private void notification() {
mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notifyId = 1;
description = "Hello World, welcome to Android Oreo!";
Intent intent = new Intent(this, MainActivity.class);
mPendingIntent = PendingIntent.getActivity(this, notifyId, intent, PendingIntent.FLAG_UPDATE_CURRENT);
if (SDK_INT >= O) {
id = "id";
name = "a";
importance = NotificationManager.IMPORTANCE_HIGH;
mChannel = new NotificationChannel(id, name, importance);
mChannel.setDescription(description);
mChannel.enableLights(true);
mChannel.setLightColor(Color.WHITE);
mChannel.enableVibration(true);
mChannel.setVibrationPattern(new long[] {100, 300, 200, 300});
mNotificationManager.createNotificationChannel(mChannel);
mNotification = new Notification.Builder(MainActivity.this, id)
.setContentTitle(id)
.setContentText(description)
.setContentIntent(mPendingIntent)
.setSmallIcon(R.drawable.ic_launcher_foreground)
.build();
} else {
mNotification = new Notification.Builder(MainActivity.this)
.setContentTitle(id)
.setContentText(description)
.setContentIntent(mPendingIntent)
.setSmallIcon(R.drawable.ic_launcher_foreground)
.setLights(Color.WHITE, Color.RED, Color.GREEN)
.setVibrate(new long[] {100, 300, 200, 300})
.build();
}
mNotificationManager.notify(notifyId, mNotification);
}
}
notification()
方法。我已经将其放置在一个活动中作为示例,当我点击相关按钮时通知会被触发。你可以通过服务或活动来触发通知。 - Sneh Pandya