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Android:通知栏的使用

2016-07-08 11:47 393 查看
很久没有使用Android的通知功能了,今天把两年前的代码搬出来一看,发现很多方法都废弃了,代码中各种删除线看的十分不爽。于是乎,打开Google,查看官方文档,学习最新的发送通知栏消息的方法。

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.
(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());
}
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