实现直播电商源码的通知栏中的下载进度条
实现的功能：直播电商源码使用下载框架下载文件，下载的进度通过eventbus发送，期间遇到了在安卓8.0系统上通知栏不显示的问题
一、创建通知的时候，要对安卓8.0系统特殊处理
1.先声明好直播电商源码开发需要用到的成员变量
private NotificationManager mNotifyMgr;
private PendingIntent contentIntent;
private Notification.Builder builder;
public String NOTIFICATION_CHANNEL_ID = "notification_id";
private static final int NO_3 = 0x3;
2.创建Notification
//这里要特殊处理一下安卓8.0的Notificationprivate void initNotifications() {mNotifyMgr= (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);//点击标题栏会跳转到哪个页面contentIntent = PendingIntent.getActivity(this, 0, new Intent(this, MainActivity.class), 0);if (Build.VERSION.SDK_INT >= 26) {NotificationChannel channel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "APP_NAME", NotificationManager.IMPORTANCE_HIGH);//设置静音，但是一些设备貌似不起作用（华为pad就不行，还是会有提示音）channel.setSound(null,null);if (mNotifyMgr != null) {mNotifyMgr.createNotificationChannel(channel);}builder = new Notification.Builder(this, NOTIFICATION_CHANNEL_ID);builder.setContentTitle("标题");builder.setContentText("内容");builder.setSmallIcon(R.drawable.icon);//因为会频繁更新下载进度，所以这样设置之后，提示音只会提示一次builder.setOnlyAlertOnce(true);} else {builder = new Notification.Builder(this);if(Build.VERSION.SDK_INT >= 21) {builder.setSound(null,null);}builder.setContentTitle("标题");builder.setContentText("内容");builder.setSmallIcon(R.drawable.icon);builder.setDefaults(Notification.DEFAULT_LIGHTS);builder.setOnlyAlertOnce(true);}builder.setContentIntent(contentIntent);}
3.根据接收到的eventbus，来设置通知栏
@Subscribe(threadMode = ThreadMode.MAIN)public void downLoadMsg(DownloadStateEvent downloadStateEvent) {switch (downloadStateEvent.getDownloadState()) {case start://下载开始，显示通知栏mNotifyMgr.notify(NO_3, builder.build());break;case progress://设置通知栏下载进度builder.setProgress(100, downloadStateEvent.getProgress(), false);mNotifyMgr.notify(NO_3, builder.build());break;case error://下载失败mNotifyMgr.cancel(NO_3);//设置关闭通知栏break;case finish://下载完成mNotifyMgr.cancel(NO_3);//设置关闭通知栏break;default:break;}}
直播电商源码使用该api需要minSdkVersion最低位16
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