android 9.0通知栏适配，可用通知栏，悬浮通知，震动，提示音，

直接代码，demo复制到一个新的activity可用
android 9.0，设置对应手机弹窗方式即可
package com.example.administrator.myapplication;import android.os.Build;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.app.Notification;import android.app.NotificationChannel;import android.app.NotificationChannelGroup;import android.app.NotificationManager;import android.app.PendingIntent;import android.app.TaskStackBuilder;import android.content.Context;import android.content.Intent;import android.graphics.Color;import android.os.Bundle;import android.provider.Settings;import android.support.annotation.Nullable;import android.support.v7.app.AppCompatActivity;import android.view.View;import static android.app.Notification.BADGE_ICON_SMALL;/** * @author Administrator */public class MainActivity extends AppCompatActivity {    private NotificationManager mNotificationManager;    private String groupId = "groupId";    private CharSequence groupName = "Group1";    private String groupId2 = "groupId2";    private CharSequence groupName2 = "Group2";    private String chatChannelId2 = "chatChannelId2";    private String adChannelId2 = "adChannelId2";    private String chatChannelId = "chatChannelId";    private String chatChannelName = "聊天通知";    private String chatChannelDesc = "这是一个聊天通知，建议您置于开启状态，这样才不会漏掉女朋友的消息哦";    private int chatChannelImportance = NotificationManager.IMPORTANCE_MAX;    private String adChannelId = "adChannelId";    private String adChannelName = "广告通知";    private String adChannelDesc = "这是一个广告通知，可以关闭的，但是如果您希望我们做出更好的软件服务于你，请打开广告支持一下吧";    private int adChannelImportance = NotificationManager.IMPORTANCE_LOW;    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);        createGroup();        notification();    }    public void notification() {        createNotificationChannel(chatChannelId, chatChannelName, chatChannelImportance, chatChannelDesc, groupId2);        Notification.Builder builder = null;        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {            builder = new Notification.Builder(this, chatChannelId);            builder.setSmallIcon(R.mipmap.ic_launcher)                    .setContentTitle("我是标题")                    .setContentText("内容：Today released Android 8.0 version of its name is Oreo")                    .setBadgeIconType(BADGE_ICON_SMALL)                    .setNumber(1)                    .setAutoCancel(true);            Intent resultIntent = new Intent(this, MainActivity.class);            TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);            stackBuilder.addParentStack(MainActivity.class);            stackBuilder.addNextIntent(resultIntent);            PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);            builder.setContentIntent(resultPendingIntent);            mNotificationManager.notify((int) System.currentTimeMillis(), builder.build());        }    }    public void notification2() {        createNotificationChannel(adChannelId, adChannelName, adChannelImportance, adChannelDesc, groupId2);        Notification.Builder builder = null;        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {            builder = new Notification.Builder(this, adChannelId);            builder.setSmallIcon(R.mipmap.ic_launcher)                    .setContentTitle("我是广告")                    .setContentText("内容：恰饭时间到了，Oreo is Coming.")                    .setBadgeIconType(BADGE_ICON_SMALL)                    .setNumber(1)                    .setAutoCancel(true);            Intent resultIntent = new Intent(this, MainActivity.class);            TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);            stackBuilder.addParentStack(MainActivity.class);            stackBuilder.addNextIntent(resultIntent);            PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);            builder.setContentIntent(resultPendingIntent);            mNotificationManager.notify((int) System.currentTimeMillis(), builder.build());        }    }    public void createNotificationChannel(String id, String name, int importance, String desc, String groupId) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {            if (mNotificationManager.getNotificationChannel(id) != null) {                return;            }            NotificationChannel notificationChannel = new NotificationChannel(id, name, importance);            notificationChannel.enableLights(true);            notificationChannel.enableVibration(true);            notificationChannel.setLightColor(Color.RED);            notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);            notificationChannel.setShowBadge(true);            notificationChannel.setBypassDnd(true);            notificationChannel.setVibrationPattern(new long[]{100, 200, 300, 400});            notificationChannel.setDescription(desc);            notificationChannel.setGroup(groupId);//        notificationChannel.setSound();            mNotificationManager.createNotificationChannel(notificationChannel);        }    }    public void delNotification(View view) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {            mNotificationManager.deleteNotificationChannel(chatChannelId);        }    }    public void delNotification2(View view) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {            mNotificationManager.deleteNotificationChannel(adChannelId);        }    }    public void setting(View view) {        Intent intent = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS);        intent.putExtra(Settings.EXTRA_CHANNEL_ID, chatChannelId);        intent.putExtra(Settings.EXTRA_APP_PACKAGE, getPackageName());        startActivity(intent);    }    public void createGroup() {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {            mNotificationManager.createNotificationChannelGroup(new NotificationChannelGroup(groupId, groupName));            mNotificationManager.createNotificationChannelGroup(new NotificationChannelGroup(groupId2, groupName2));            createNotificationChannel(chatChannelId2, chatChannelName, chatChannelImportance, chatChannelDesc, groupId);            createNotificationChannel(adChannelId2, adChannelName, adChannelImportance, adChannelDesc, groupId);        }    }    public void delNotificationGroup(View view) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {            mNotificationManager.deleteNotificationChannelGroup(groupId2);        }    }}
具体可查看：http://gavinliu.cn/2017/08/22/Android-吃奥利奥系列-1-Notification/
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