Android之开发消息通知栏

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
android:paddingbottom="@dimen/activity_vertical_margin"
android:paddingleft="@dimen/activity_horizontal_margin" android:paddingright="@dimen/activity_horizontal_margin"
android:paddingtop="@dimen/activity_vertical_margin"
tools:context="edu.feicui.notification.mainactivity">
 <button
 android:id="@+id/btn_create"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="发送通知"
 android:textsize="25sp" />
</linearlayout>

package edu.feicui.notification;
import android.app.notification;
import android.app.notificationmanager;
import android.app.pendingintent;
import android.content.intent;
import android.os.bundle;
import android.support.v7.app.appcompatactivity;
import android.widget.remoteviews;
import butterknife.butterknife;
import butterknife.onclick;
public class mainactivity extends appcompatactivity {
 /**
 * 通知栏notification
 */
 private notificationmanager mmanager;
 private notification mnotification;
 private pendingintent mintent;
 private string cll;
 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.activity_main);
 cll = "今年27号过年哟!";
 butterknife.bind(this);
 }
 @override
 public void oncontentchanged() {
 super.oncontentchanged();
 init();
 }
 private void init() {
 //初始化通知栏管理者
 mmanager = (notificationmanager) getsystemservice(notification_service);

 //意图数组
 intent[] intents = {new intent(this, notificationacitivity.class)};
 //待处理意图对象
 mintent = pendingintent.getactivities(this, 0, intents, 0);
 //消息栏通知对象
 mnotification = new notification();
 }
 @onclick(r.id.btn_create)
 public void create() {
 //设置在通知栏的消息图标
 mnotification.icon = r.mipmap.logo_new;
 //设置在通知栏的信息内容
 mnotification.tickertext = "重大消息";
 //设置默认的声音,此外还可以设置震动（需加入权限）
 mnotification.defaults = notification.default_sound;
 //添加灯光
// mnotification.defaults=notification.default_lights;
 //不能删除
 mnotification.flags = notification.flag_no_clear;
 //设置下拉时的显示布局
 remoteviews convertview = new remoteviews(getpackagename(), r.layout.layout_content);
 convertview.setimageviewresource(r.id.img, r.mipmap.logo_new);
 convertview.settextviewtext(r.id.txt, cll);
 mnotification.contentview = convertview;
 mnotification.contentintent = mintent;
 //发送通知
 // 第一个参数唯一的标识该notification，第二个参数就是notification对象
 mmanager.notify(1, mnotification);
 }
}

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:gravity="center"
 android:orientation="vertical">
 <textview
 android:id="@+id/txt"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:textcolor="#ff0000"
 android:textsize="20dp"
 android:text="今年27号过年哟!" />
</linearlayout>

package edu.feicui.notification;
import android.app.activity;
import android.app.notificationmanager;
import android.os.bundle;
import android.widget.textview;
/**
 * created by administrator on 2017-1-20.
 */
public class notificationacitivity extends activity {
 private notificationmanager mmanager;
 private int index = 2;
 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.activity_notification);
 //初始化通知栏管理者
 mmanager = (notificationmanager) getsystemservice(notification_service);
 index = 2;
 mmanager.cancelall();
 }
}