如何使其工作 NotificationCompat.Builder notificationBuilder = new

Question

NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);

显示错误：

Builder

中的 Builder (Context) 不能应用于 (FirebaseMessagingService， java.lang.String)

帮助我解决这个问题。

我试过了Notification.Builder notificationBuilder = new Notification.Builder(this, NOTIFICATION_CHANNEL_ID);和

NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this);

但它在 API 23 和 API 27 中都不起作用。

这是代码

import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.graphics.Color;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.support.v7.app.NotificationCompat;
import com.google.firebase.messaging.RemoteMessage;

public class FirebaseMessagingService extends com.google.firebase.messaging.FirebaseMessagingService {
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
super.onMessageReceived(remoteMessage);
String notification_title = remoteMessage.getData().get("title");
String notification_msg = remoteMessage.getData().get("body");
String from_user_id = remoteMessage.getData().get("from_user_id");
String click_action = remoteMessage.getData().get("click_action");
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
String NOTIFICATION_CHANNEL_ID = "channel_id_01";
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "My Notifications", NotificationManager.IMPORTANCE_HIGH);
// Configure the notification channel.
notificationChannel.setDescription("Channel description");
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.BLUE);
notificationChannel.setVibrationPattern(new long[]{0, 1000, 500, 1000});
notificationChannel.enableVibration(true);
notificationManager.createNotificationChannel(notificationChannel);
}

Intent intent = new Intent(click_action);
intent.putExtra("user_id", from_user_id);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
notificationBuilder.setAutoCancel(true).setDefaults(Notification.DEFAULT_ALL).setWhen(System.currentTimeMillis()).setSmallIcon(R.drawable.logo1).setPriority(Notification.PRIORITY_MAX).setContentTitle(notification_title).setContentText(notification_msg).setContentInfo("Info").setContentIntent(pendingIntent);

int mNotificationId = (int) System.currentTimeMillis();
notificationManager.notify(mNotificationId, notificationBuilder.build());
}
}

build.gradle

apply plugin: 'com.android.application'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.example.android.gabwithus"
minSdkVersion 16
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'
implementation 'com.android.support:design:28.0.0-alpha3'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
implementation 'com.google.firebase:firebase-auth:16.0.2'
implementation 'com.google.firebase:firebase-core:16.0.1'
implementation 'com.google.firebase:firebase-database:16.0.1'
implementation 'com.google.firebase:firebase-messaging:17.1.0'
implementation 'com.android.support:support-v4:28.0.0-alpha3'
implementation 'com.google.firebase:firebase-storage:15.0.0'
implementation 'com.theartofdev.edmodo:android-image-cropper:2.7.0'
testImplementation 'junit:junit:4.12'
implementation 'com.squareup.picasso:picasso:2.5.2'
implementation 'com.firebaseui:firebase-ui-database:2.0.1'
implementation 'com.squareup.okhttp:okhttp:2.5.0'
implementation 'id.zelory:compressor:2.1.0'
implementation 'com.android.support:support-media-compat:28.0.0-alpha3'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'de.hdodenhof:circleimageview:2.2.0'
implementation 'com.theartofdev.edmodo:android-image-cropper:2.5.1'
implementation 'com.facebook.fresco:fresco:1.5.0'
}
apply plugin: 'com.google.gms.google-services'
configurations.all {
resolutionStrategy.eachDependency { DependencyResolveDetails details ->
def requested = details.requested
if (requested.group == 'com.android.support') {
if (!requested.name.startsWith("multidex")) {
details.useVersion '25.3.0'
}
}
}
}

Answer 1

尝试使用它，我认为您的问题就在这里：details.useVersion '25.3.0'

configurations.all {
resolutionStrategy.eachDependency { DependencyResolveDetails details ->
def requested = details.requested
if (requested.group == 'com.android.support') {
if (!requested.name.startsWith("multidex")) {
details.useVersion '27.1.0'
}
}
}
}

Answer 2

问题是你使用的是import android.support.v7.app.NotificationCompat.该v7.app.NotificationCompat实际上已在修订版 27.0.0 中删除，并且从未更新以支持通知通道。

您应该删除该行，而是导入android.support.v4.app.NotificationCompat，它确实支持通知通道。

Answer 3

它在所有 API 中的工作 试试这个：

public void sendNotification(String messageBody) {
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
NotificationCompat.Builder builder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_enable_notification_icon)
.setColor(Color.parseColor("#5878f2"))
.setContentTitle(getString(R.string.app_name))
.setContentText(messageBody)               
.setAutoCancel(true);
Intent notificationIntent = new Intent(this, MainActivity.class);
notificationIntent.putExtra("message",messageBody);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(contentIntent);
if(Build.VERSION_CODES.O <= Build.VERSION.SDK_INT) {
builder.setChannelId(createNotificationChannel());
}
Notification notification = builder.build();
notificationManager.notify(211, notification);
}
@RequiresApi(api = Build.VERSION_CODES.O)
private String createNotificationChannel(){
String channelId = "demo";
String channelName = "My demo";
NotificationChannel mChannel = new NotificationChannel(channelId,channelName, NotificationManager.IMPORTANCE_NONE);
mChannel.setImportance(NotificationManager.IMPORTANCE_HIGH);
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (mNotificationManager != null) {
mNotificationManager.createNotificationChannel(mChannel);
}
return channelId;
}

Answer 4

安卓O及以上版本需要通知通道。 下面是一个工作示例。getRequestCode 方法适用于不同的通知，以便它们不会替换。 您也可以使用任何数字。如果您使用相同的数字通知将自动替换，所以我使用随机数生成器。

private static int getRequestCode() {
Random rnd = new Random();
return 100 + rnd.nextInt(900000);
}

PendingIntent pendingIntent = PendingIntent.getActivity(this, getRequestCode()  /* Request code */, intent,
PendingIntent.FLAG_ONE_SHOT);
Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.mipmap.ic_launcher)
.setLargeIcon(BitmapFactory.decodeResource(this.getResources(),
R.mipmap.ic_launcher))
.setContentTitle(neplaiTile) // use your own title
.setContentText(message)    // use your own message
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setContentIntent(pendingIntent)
.setPriority(Notification.PRIORITY_MAX)
.setBadgeIconType(Notification.BADGE_ICON_SMALL);

NotificationManager notificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "NOTIFICATION_CHANNEL_NAME", importance);
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.RED);
notificationChannel.enableVibration(true);
notificationChannel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});
assert notificationManager != null;
notificationBuilder.setChannelId(NOTIFICATION_CHANNEL_ID);
notificationManager.createNotificationChannel(notificationChannel);
}
assert notificationManager != null;
notificationManager.notify(getRequestCode() /* Request Code */, notificationBuilder.build());