android开发分享Android 8.0实现发送通知

  import android.app.application;    import com.xinrui.ndkapp.notification.notificationchannels;    public class ndkapplication extends application {    @override    public void oncreate() {      super.oncreate();      notificationchannels.createallnotificationchannels(this);    }  }

  public class notificationchannels {    public final static string critical = "critical";    public final static string importance = "importance";    public final static string default = "default";    public final static string low = "low";    public final static string media = "media";      public static void createallnotificationchannels(context context) {      notificationmanager nm = (notificationmanager) context.getsystemservice(context.notification_service);        if(nm == null) {        return;      }        notificationchannel mediachannel = new notificationchannel(          media,          context.getstring(r.string.app_name),          notificationmanager.importance_default);      mediachannel.setsound(null,null);      mediachannel.setvibrationpattern(null);        nm.createnotificationchannels(arrays.aslist(          new notificationchannel(              critical,              context.getstring(r.string.app_name),              notificationmanager.importance_high),          new notificationchannel(              importance,              context.getstring(r.string.app_name),              notificationmanager.importance_default),          new notificationchannel(              default,              context.getstring(r.string.app_name),              notificationmanager.importance_low),          new notificationchannel(              low,              context.getstring(r.string.app_name),              notificationmanager.importance_min),          //custom notification channel          mediachannel      ));    }  }

  public void sendsimplenotification(context context, notificationmanager nm) {      //创建点击通知时发送的广播      intent intent = new intent(context, notificationmonitorservice.class);      intent.setaction("android.service.notification.notificationlistenerservice");      pendingintent pi = pendingintent.getservice(context,0,intent,0);      //创建删除通知时发送的广播      intent deleteintent = new intent(context,notificationmonitorservice.class);      deleteintent.setaction(intent.action_delete);      pendingintent deletependingintent = pendingintent.getservice(context,0,deleteintent,0);      //创建通知      notification.builder nb = new notification.builder(context, notificationchannels.default)          //设置通知左侧的小图标          .setsmallicon(r.drawable.ic_notification)          //设置通知标题          .setcontenttitle("simple notification")          //设置通知内容          .setcontenttext("demo for simple notification!")          //设置点击通知后自动删除通知          .setautocancel(true)          //设置显示通知时间          .setshowwhen(true)          //设置通知右侧的大图标          .setlargeicon(bitmapfactory.decoderesource(context.getresources(),r.drawable.ic_notifiation_big))          //设置点击通知时的响应事件          .setcontentintent(pi)          //设置删除通知时的响应事件          .setdeleteintent(deletependingintent);      //发送通知      nm.notify(notificaitons.notification_sample,nb.build());   }