普通的通知构建器在Android O上不会显示通知。
如何在Android 8 Oreo上显示通知？
是否需要添加新代码以在Android O上显示通知？
Oreo中的通知未显示
193
- amorenew
1
3我忘记在NotificationCompat.Builder中设置“.setChannelId”，现在它在Oreo（8.0）上可以工作了。 - varotariya vajsi
24个回答
0
private void addNotification() {
NotificationCompat.Builder builder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher_background)
.setContentTitle("Notifications Example")
.setContentText("This is a test notification");
Intent notificationIntent = new Intent(this, MainActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(contentIntent);
// Add as notification
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O)
{
NotificationChannel nChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "NOTIFICATION_CHANNEL_NAME", NotificationManager.IMPORTANCE_HIGH);
nChannel.enableLights(true);
assert manager != null;
builder.setChannelId(NOTIFICATION_CHANNEL_ID);
manager.createNotificationChannel(nChannel);
}
assert manager != null;
manager.notify(0, builder.build());
}
- Brijesh padsala
0
在Android Oreo中，通知应用是通过使用通道和NotificationHelper类完成的。它应该具有通道ID和通道名称。
首先，您需要创建一个NotificationHelper类。
在活动的XML文件中创建一个按钮，然后在主活动中使用它。
首先，您需要创建一个NotificationHelper类。
public class NotificationHelper extends ContextWrapper {
private static final String EDMT_CHANNEL_ID="com.example.safna.notifier1.EDMTDEV";
private static final String EDMT_CHANNEL_NAME="EDMTDEV Channel";
private NotificationManager manager;
public NotificationHelper(Context base)
{
super(base);
createChannels();
}
private void createChannels()
{
NotificationChannel edmtChannel=new NotificationChannel(EDMT_CHANNEL_ID,EDMT_CHANNEL_NAME,NotificationManager.IMPORTANCE_DEFAULT);
edmtChannel.enableLights(true);
edmtChannel.enableVibration(true);
edmtChannel.setLightColor(Color.GREEN);
edmtChannel.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
getManager().createNotificationChannel(edmtChannel);
}
public NotificationManager getManager()
{
if (manager==null)
manager=(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
return manager;
}
public NotificationCompat.Builder getEDMTChannelNotification(String title,String body)
{
return new NotificationCompat.Builder(getApplicationContext(),EDMT_CHANNEL_ID)
.setContentText(body)
.setContentTitle(title)
.setSmallIcon(R.mipmap.ic_launcher_round)
.setAutoCancel(true);
}
}
在活动的XML文件中创建一个按钮，然后在主活动中使用它。
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
helper=new NotificationHelper(this);
btnSend=(Button)findViewById(R.id.btnSend);
btnSend.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String title="Title";
String content="Content";
Notification.Builder builder=helper.getEDMTChannelNotification(title,content);
helper.getManager().notify(new Random().nextInt(),builder.build());
}
});
}
然后运行您的项目
- CodMania
0
以下代码在我的奥利奥系统中运行正常，你可以尝试一下。希望它能对你有用。
私有void sendNotification(Context ctx，String title，int notificationNumber，String message，String subtext，Intent intent）{ 尝试 {
私有void sendNotification(Context ctx，String title，int notificationNumber，String message，String subtext，Intent intent）{ 尝试 {
PendingIntent pendingIntent = PendingIntent.getActivity(ctx, notificationNumber, intent,
PendingIntent.FLAG_UPDATE_CURRENT);
Uri url = null;
NotificationCompat.Builder notificationBuilder = null;
try {
if (Build.VERSION.SDK_INT >= 26) {
try{
NotificationManager notificationManager = (NotificationManager)getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.deleteNotificationChannel(CHANNEL_ID_1);
notificationManager.deleteNotificationChannel(CHANNEL_ID_2);
if(!intent.getStringExtra("type").equalsIgnoreCase(""+TYPE_REQUEST)){
NotificationChannel breaking = new NotificationChannel(CHANNEL_ID_1, CHANNEL_ID_1_NAME, NotificationManager.IMPORTANCE_HIGH);
breaking.setShowBadge(false);
breaking.enableLights(true);
breaking.enableVibration(true);
breaking.setLightColor(Color.WHITE);
breaking.setVibrationPattern(new long[]{100, 200, 100, 200, 100, 200, 100});
breaking.setSound(url,new AudioAttributes.Builder().build());
notificationBuilder = new NotificationCompat.Builder(this,CHANNEL_ID_1)
.setSmallIcon(R.mipmap.ic_launcher);
notificationManager.createNotificationChannel(breaking);
}else{
NotificationChannel politics = new NotificationChannel(CHANNEL_ID_2,CHANNEL_ID_2_NAME, NotificationManager.IMPORTANCE_DEFAULT);
politics.setShowBadge(false);
politics.enableLights(true);
politics.enableVibration(true);
politics.setLightColor(Color.BLUE);
politics.setVibrationPattern(new long[]{100, 200, 100, 200, 100});
politics.setSound(url,new AudioAttributes.Builder().build());
notificationBuilder = new NotificationCompat.Builder(this,CHANNEL_ID_2)
.setSmallIcon(R.mipmap.ic_launcher);
notificationManager.createNotificationChannel(politics);
}
}catch (Exception e){
e.printStackTrace();
}
} else {
notificationBuilder = new NotificationCompat.Builder(ctx)
.setSmallIcon(R.mipmap.ic_launcher);
}
} catch (Exception e) {
e.printStackTrace();
}
if (notificationBuilder == null) {
notificationBuilder = new NotificationCompat.Builder(ctx)
.setSmallIcon(R.mipmap.ic_launcher);
}
notificationBuilder.setContentTitle(title);
notificationBuilder.setSubText(subtext);
notificationBuilder.setAutoCancel(true);
notificationBuilder.setContentIntent(pendingIntent);
notificationBuilder.setNumber(notificationNumber);
NotificationManager notificationManager =
(NotificationManager) ctx.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(notificationNumber, notificationBuilder.build());
} catch (Exception e) {
e.printStackTrace();
}
}
- gpuser
-1
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, "CHANNEL_ID")
........
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
CharSequence name = "Hello";// The user-visible name of the channel.
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, name, importance);
mNotificationManager.createNotificationChannel(mChannel);
}
mNotificationManager.notify(notificationId, notificationBuilder.build());
- Pradeep Kumar S
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