Android中通过Notification&NotificationManager实现消息通知
notification是一种让你的应用程序在没有开启情况下或在后台运行警示用户。它是看不见的程序组件(Broadcast Receiver,Service和不活跃的Activity)警示用户有需要注意的事件发生的最好途径。
1、新建一个android项目
我新建项目的 minSdkVersion="11",targetSdkVersion="19"。也就是支持最低版本的3.0的。
2、习惯性地打开项目清单文件AndroidManifest.xml,添加一个权限:<uses-permission android:name="android.permission.VIBRATE"/> 不添加不行的。
3、在布局activity_main.xml中添加几个按钮,样子就大概这样,垂直排版的LinearLayout
具体代码
<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:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:orientation="vertical" tools:context=".MainActivity" > <Button android:id="@+id/btn_01" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="3.0以前版本的notification,用新的吧" android:onClick="click" /> <Button android:id="@+id/btn_02" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="大视图文本通知" android:onClick="click" /> <Button android:id="@+id/btn_03" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="大视图图片通知" android:onClick="click" /> <Button android:id="@+id/btn_04" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="进度条通知" android:onClick="click" /> </LinearLayout>
4、MainActivity中的代码:
package com.xin.day__notificationdemo; import java.util.Timer; import java.util.TimerTask; import android.app.Activity; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Intent; import android.graphics.BitmapFactory; import android.os.Bundle; import android.support.v.app.NotificationCompat; import android.support.v.app.NotificationCompat.BigPictureStyle; import android.support.v.app.NotificationCompat.BigTextStyle; import android.support.v.app.NotificationCompat.Builder; import android.util.Log; import android.view.View; public class MainActivity extends Activity { //通知的唯一标识,在一个应用程序中不同的通知要区别开来 private static final int NO = x; private static final int NO = x; private static final int NO = x; private static final int NO = x; //进度条要用 private int progress = ; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } //click方法,和xml文件中的各个按钮的onClick属性的值要一致 public void click(View view) { //创建NotificationManager final NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE); //用switch语句控制四个控件 switch (view.getId()) { case R.id.btn_: { Notification notification = new Notification(); notification.icon = R.drawable.ic_launcher; notification.tickerText = "有消息了。。。"; Intent intent = new Intent(this, MainActivity.class); PendingIntent pendingIntent = PendingIntent.getActivity(this, , intent, PendingIntent.FLAG_UPDATE_CURRENT); notification.setLatestEventInfo(this, ".以前的通知", "试试而已", pendingIntent); notification.when = System.currentTimeMillis(); notification.defaults = Notification.DEFAULT_ALL; notification.flags = Notification.FLAG_AUTO_CANCEL; notification.number = ; notification.vibrate = new long[]{, }; manager.notify(NO, notification); } break; case R.id.btn_:{ //大视图文本通知 //创建消息构造器,在扩展包 NotificationCompat.Builder builder = new NotificationCompat.Builder(this); //设置当有消息是的提示,图标和提示文字 builder.setSmallIcon(R.drawable.ic_launcher).setTicker("有新消息了"); //需要样式 BigTextStyle style = new BigTextStyle(); style.setBigContentTitle("上课通知");//通知的标题 style.bigText("今天下午要在综B上jsp");//通知的文本内容 //大视图文本具体内容 style.setSummaryText("这是正常的课程安排,请各位同学按时上课"); builder.setStyle(style); //显示消息到达的时间,这里设置当前时间 builder.setWhen(System.currentTimeMillis()); //获取一个通知对象 Notification notification = builder.build(); notification.flags = Notification.FLAG_AUTO_CANCEL; //发送(显示)通知 //notify()第一个参数id An identifier for this notification unique within your application //get?意思说,这个通知在你的应用程序中唯一的标识符 manager.notify(NO, notification); } break; case R.id.btn_:{ //大视图图片通知 NotificationCompat.Builder builderPic = new Builder(this); builderPic.setSmallIcon(R.drawable.ic_launcher).setTicker("新浪体育提醒"); //进行设置 BigPictureStyle pictureStyle = new BigPictureStyle(); pictureStyle.setBigContentTitle("新浪体育 快船VS骑士 "); pictureStyle.bigPicture(BitmapFactory.decodeResource(getResources(), R.drawable.ic_game)); pictureStyle.setSummaryText(" 快船VS骑士 天王山之战!!!");//不要在意文字 //设置样式 builderPic.setStyle(pictureStyle); //设置显示的时间 builderPic.setWhen(System.currentTimeMillis()); Notification notification = pictureStyle.build(); notification.flags = Notification.FLAG_AUTO_CANCEL; // manager.notify(NO, notification); } break; case R.id.btn_:{ //进度条通知 final NotificationCompat.Builder builderProgress = new NotificationCompat.Builder(this); builderProgress.setSmallIcon(R.drawable.ic_launcher).setTicker("进度条通知"); builderProgress.setProgress(, progress, false); final Notification notification = builderProgress.build(); //发送一个通知 manager.notify(NO, notification); //创建一个计时器 Timer timer = new Timer(); timer.schedule(new TimerTask(){ @Override public void run() { Log.i("progress",progress+""); while(progress <= ){ progress ++; try { Thread.sleep(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } //更新进度条 builderProgress.setProgress(, progress, false); //再次通知 manager.notify(NO, builderProgress.build()); } //计时器退出 this.cancel(); //进度条退出 manager.cancel(NO); return;//结束方法 } }, ); } break; default: break; } } }
5、运行:我的虚拟机版本是4.0的(api19),按住通知左(右)滑动就可以让通知小时了。
效果如下:
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