总结Android编程之通知栏的用法

编辑作者:www.789mux.com    在线用户:58    标签: 编程    程序   

小编已经很久没有使用的通知功能了,今天,翻看着两年前的代码,发现很多方法都被放弃了,其实在代码中看到各种删除行是非常不愉快的。爱站技术频道将和你细细道来。

1.首先,获取系统的通知服务:

 
NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

 

2.发送一个最简单的通知

public void simpleNotice(View view) {
    //此Builder为android.support.v4.app.NotificationCompat.Builder中的,下同。
    Builder mBuilder = new Builder(this);
    //系统收到通知时,通知栏上面显示的文字。
    mBuilder.setTicker("天津,晴,2~15度,微风");
    //显示在通知栏上的小图标
    mBuilder.setSmallIcon(R.drawable.consult_answer);
    //通知标题
    mBuilder.setContentTitle("天气预报");
    //通知内容
    mBuilder.setContentText("天津,晴,2~15度,微风");
    //设置大图标,即通知条上左侧的图片(如果只设置了小图标,则此处会显示小图标)
    mBuilder.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.share_sina));
    //显示在小图标左侧的数字
    mBuilder.setNumber(6);
    //设置为不可清除模式
    mBuilder.setOngoing(true);
    //显示通知,id必须不重复,否则新的通知会覆盖旧的通知(利用这一特性,可以对通知进行更新)
    nm.notify(1, mBuilder.build());
}

3.删除一个通知。参数即为通知的id

nm.cancel(1);

4.发送一个通知,点击通知后跳转到一个Activity,从这个Activity返回后,进入程序内的某一个页面(一般为主页)

//点击通知进入一个Activity,点击返回时进入指定页面。
public void resultActivityBackApp(View view) {
    Builder mBuilder = new Builder(this);
    mBuilder.setTicker("通知标题2");
    mBuilder.setSmallIcon(R.drawable.ic_launcher);
    mBuilder.setContentTitle("通知标题2");
    mBuilder.setContentText("点击通知进入一个Activity,点击返回时进入指定页面。");
    //设置点击一次后消失(如果没有点击事件,则该方法无效。)
    mBuilder.setAutoCancel(true);
    //点击通知之后需要跳转的页面
    Intent resultIntent = new Intent(this, ResultActivityBackApp.class);
    //使用TaskStackBuilder为“通知页面”设置返回关系
    TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
    //为点击通知后打开的页面设定 返回 页面。(在manifest中指定)
    stackBuilder.addParentStack(ResultActivityBackApp.class);
    stackBuilder.addNextIntent(resultIntent);
    PendingIntent pIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
    mBuilder.setContentIntent(pIntent);
    // mId allows you to update the notification later on.
    nm.notify(2, mBuilder.build());
}

同时,需要在manifest中为点击通知后打开的Activity指定父Activity.

<activity
  android:name=".ResultActivityBackApp"
  android:parentActivityName=".MainActivity">
  <meta-data
    android:name="android.support.PARENT_ACTIVITY"
    android:value=".MainActivity" />
</activity>

(其中,activity的属性parentActivityName为API 16中的属性,meta-data中的代码为兼容API 16以下。因此,对于大多数程序,这两个地方都得写。)

5.和上述4类似,只是在打开的Activity中返回时回到home页

//点击通知进入一个Activity,点击返回时回到桌面
public void resultActivityBackHome(View view) {
    Builder mBuilder = new Builder(this);
    mBuilder.setTicker("通知标题3");
    mBuilder.setSmallIcon(R.drawable.ic_launcher);
    mBuilder.setContentTitle("通知标题3");
    mBuilder.setContentText("点击通知进入一个Activity,点击返回时回到桌面");
    //设置点击一次后消失(如果没有点击事件,则该方法无效。)
    mBuilder.setAutoCancel(true);
    Intent notifyIntent = new Intent(this, ResultActivityBackHome.class);
    notifyIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    PendingIntent pIntent = PendingIntent.getActivity(this, 0, notifyIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    mBuilder.setContentIntent(pIntent);
    nm.notify(3, mBuilder.build());
}

6.带进度条的通知

public void progressNotice(View view) {
    final Builder mBuilder = new Builder(this);
    mBuilder.setTicker("通知标题4");
    mBuilder.setContentTitle("Picture Download")
        .setContentText("Download in progress")
        .setSmallIcon(R.drawable.ic_launcher);
    // Start a lengthy operation in a background thread
    new Thread(new Runnable() {
      @Override
      public void run() {
        int progress;
        for (progress = 0; progress <= 100; progress++) {
          // Sets the progress indicator to a max value, the current completion percentage,
          // and "determinate" state
          mBuilder.setProgress(100, progress, false);
          //不明确进度的进度条
//          mBuilder.setProgress(0, 0, true);
          nm.notify(4, mBuilder.build());
          // 模拟延时
          try {
            Thread.sleep(200);
          } catch (InterruptedException e) {
            e.printStackTrace();
          }
        }
        // When the loop is finished, updates the notification
        mBuilder.setContentText("Download complete");
        // Removes the progress bar
        mBuilder.setProgress(0, 0, false);
        nm.notify(4, mBuilder.build());
      }
    }
    ).start();
}

7.扩展布局的通知。按住通知条下滑,可以查看更详细的内容

public void expandLayoutNotice(View view) {
    Builder mBuilder = new Builder(this);
    mBuilder.setTicker("通知标题5");
    mBuilder.setSmallIcon(R.drawable.ic_launcher);
    mBuilder.setContentTitle("通知标题5");
    mBuilder.setContentText("按住通知下拉可显示扩展布局");
    NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
    String[] events = new String[]{"Beijing", "Tianjin", "Shanghai", "Guangzhou"};
    // 设置扩展布局的标题
    inboxStyle.setBigContentTitle("Event tracker details:");
    for (String s : events) {
      inboxStyle.addLine(s);
    }
    mBuilder.setStyle(inboxStyle);
    nm.notify(5, mBuilder.build());
}

8.自定义布局的通知栏。(根据谷歌的官方文档不推荐这么做,因为使用这种方式时,对不同屏幕进行适配需要考虑的因素太多。而且,通知栏应该展示的就是最简明扼要的信息,对于大多数程序默认的布局已经足够了。)

//自定义布局的通知
public void customLayoutNotice(View view) {
    Builder mBuilder = new Builder(this);
    mBuilder.setTicker("通知标题6");
    mBuilder.setTicker("通知标题6");
    mBuilder.setSmallIcon(R.drawable.ic_launcher);
    RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.custom_layout_notice);
    mBuilder.setContent(remoteViews);
    //为RemoteViews上的按钮设置文字
    remoteViews.setCharSequence(R.id.custom_layout_button1, "setText", "Button1");
    remoteViews.setCharSequence(R.id.custom_layout_button2, "setText", "Button2");
    //为RemoteViews上的按钮设置点击事件
    Intent intent1 = new Intent(this, CustomLayoutResultActivity.class);
    intent1.putExtra("content", "From button1 click!");
    PendingIntent pIntentButton1 = PendingIntent.getActivity(this, 0, intent1, PendingIntent.FLAG_UPDATE_CURRENT);
    remoteViews.setOnClickPendingIntent(R.id.custom_layout_button1, pIntentButton1);
    Intent intent2 = new Intent(this, CustomLayoutResultActivity.class);
    intent2.putExtra("content", "From button2 click!");
    PendingIntent pIntentButton2 = PendingIntent.getActivity(this, 1, intent2, PendingIntent.FLAG_UPDATE_CURRENT);
    remoteViews.setOnClickPendingIntent(R.id.custom_layout_button2, pIntentButton2);
    nm.notify(6, mBuilder.build());
}
本文是爱站技术频道小编总结Android编程之通知栏的用法,这篇文章你觉得怎样呢?我们要多多翻看以前的记录,如果你对它感兴趣,不妨尝试一下吧。

 

请发表您的评论