Android Notification通知栏的必备姿势
android开发，可能经常使用到通知管理者，在手机顶部显示通知。封装一些常用的方法，可以减少代码冗余。通常情况下，显示下载进度，播放器通知栏操作，显示APP状态信息，发送友情提示等，都需要用到Notification。
一，直接贴代码，直观了解通知栏。
/**
* Created by duqian on 16/01/23.
* Android通知栏封装
*/
public class NotificationUtils {
private static final int SmallIcon = R.drawable.ic_launcher;
public static final int NotificationNumber = 1;
private static NotificationManager mManager;
private static NotificationCompat.Builder mBuilder;
private static final Random RANDOM = new Random();
/**
* 获取Builder
*/
public static NotificationCompat.Builder getBuilder(Context context) {
mBuilder = new NotificationCompat.Builder(context);
mBuilder.setNumber(NotificationNumber)
.setWhen(System.currentTimeMillis())
.setPriority(Notification.PRIORITY_DEFAULT)
.setAutoCancel(true);
//.setDefaults(Notification.DEFAULT_VIBRATE);
return mBuilder;
}
/**
* 获取NotificationManager
*/
public static NotificationManager getManager(Context context) {
if (mManager == null) {
synchronized (NotificationUtils.class) {
if (mManager == null) {
mManager = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);
}
}
}
return mManager;
}
/**
* 显示普通的通知
*/
public static void showOrdinaryNotification(Context context, String title, String text, String ticker,
int icon, int channel) {
mBuilder = getBuilder(context);
mManager = getManager(context);
mBuilder.setContentTitle(title)
.setContentText(text)
.setContentIntent(getDefalutIntent(context, Notification.FLAG_AUTO_CANCEL))
.setNumber(NotificationNumber)//显示数量
.setTicker(ticker)//通知首次出现在通知栏，带上升动画效果的，可设置文字，图标
.setWhen(System.currentTimeMillis())//通知产生的时间
.setPriority(Notification.PRIORITY_DEFAULT)//设置该通知优先级
.setAutoCancel(true)//设置让通知将自动取消
.setOngoing(false)//ture，设置他为一个正在进行的通知。如一个文件下载,网络连接。
.setDefaults(Notification.DEFAULT_SOUND)//向通知添加声音、闪灯和振动效果。最简单、最一致的方式是使用当前的用户默认设置，使用defaults属性，可以组合：
//Notification.DEFAULT_ALL Notification.DEFAULT_SOUND 添加声音 //DEFAULT_VIBRATE requires VIBRATE permission
.setSmallIcon(SmallIcon)
;
Notification mNotification = mBuilder.build();
mNotification.icon = icon;
mManager.notify(dealWithId(channel), mNotification);
}
//获取默认的延期意图
public static PendingIntent getDefalutIntent(Context context, int flags) {
PendingIntent pendingIntent = PendingIntent.getActivity(context, 1, new Intent(), flags);
return pendingIntent;
}
//通知channel ID，唯一标示一个通知
public static int dealWithId(int channel) {
return channel >= 1 && channel <= 100 ? channel : RANDOM.nextInt(Integer.MAX_VALUE - 100) + 101;
}
//获取系统SDK版本
public static int getSystemVersion() {
int version = android.os.Build.VERSION.SDK_INT;
return version;
}
/**
* 清除所有的通知
* @param context
*/
public static void clearAllNotifification(Context context) {
mManager = getManager(context);
mManager.cancelAll();
}
/**
* 清除通知
*/
public static void clearNotifificationById(Context context, int channel）{
mManager = getManager(context);
mManager.cancel(dealWithId(channel));
}
private static int iconId = 0;
public void setIconId(int iconId){
this.iconId=iconId;
}
/**
* 默认图标
*/
private static int getPushIconId(Context context) {
if(iconId==0)
{
iconId = context.getApplicationInfo().icon;
}
if (iconId < 0) {
iconId = android.R.drawable.sym_def_app_icon;
}
return iconId;
}
//去通知文本的前15位字符
private static String getSubStringTitle(String desc) {
if (desc != null && !"".equals(desc) && desc.length() > 15) {
return desc.substring(0, 15);
} else {
return desc;
}
}
｝
/**
* 显示进度的通知栏
*/
public static void showProgressNotification(Context context, String title, String text, String ticker,
Intent resultIntent, boolean indeterminate, int progress,
int icon, int channel) {
mBuilder = getBuilder(context);
mManager = getManager(context);
PendingIntent pendingIntent = PendingIntent.getActivity(context, RequestCode, resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentTitle(ticker)//ticker,title
.setContentText(text)
.setTicker(ticker)
.setSmallIcon(SmallIcon)
.setContentIntent(pendingIntent);
if (indeterminate) {
//不确定进度的 设置为true就是不确定的那种进度条效果
mBuilder.setProgress(0, 0, true).setOngoing(false).setAutoCancel(true);
} else {
//确定进度的
mBuilder.setProgress(100, progress, false).setOngoing(true);
}
Notification progressNotification = mBuilder.build();
progressNotification.icon = icon;
mManager.notify(dealWithId(channel), progressNotification);
}
/**
* 带意图的通知栏：Intent 中可以包含很多参数、功能
* 应用场景：页面启动、跳转、安装apk
*/
public static void showIntentNotification(Context context, String title, String text, String ticker,
Intent resultIntent, int icon, int channel,int defaults) {
mBuilder = getBuilder(context);
mManager = getManager(context);
PendingIntent pendingIntent = PendingIntent.getActivity(context, RequestCode, resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentTitle(title)
.setContentText(text)
.setTicker(ticker)
.setSmallIcon(SmallIcon)
.setContentIntent(pendingIntent);
if (defaults>0){
mBuilder.setDefaults(Notification.DEFAULT_SOUND);
}
Notification mNotification = mBuilder.build();
mNotification.icon = icon;
mManager.notify(dealWithId(channel), mNotification);
}二，如何调用呢？
//提示存储空间不足，跳转到某个页面
private void notifyNotEnoughSpace(Context context) {
String title = context.getString(R.string.error_sdcard_storage_full);
String text = context.getString(R.string.buy_oair_device);
String ticker = title;
Intent resultIntent = new Intent(context,SimpleWebActivity.class);
resultIntent.putExtra(MyConstant.intent_plugin_url,OairApi.oair_buy_product);
resultIntent.putExtra(MyConstant.intent_plugin_name, context.getString(R.string.webview_oair_title));
resultIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
NotificationUtils.showIntentNotification(context, title,text, ticker, resultIntent, R.drawable.ic_launcher, channel_download_ocloud,Notification.DEFAULT_ALL);//Notification.DEFAULT_SOUND
//NotificationUtils.showOrdinaryNotification(context, title,text, ticker,R.drawable.logo_statusbar,channel_download_ocloud);
//ToastUtils.showCenterToast(context,title+","+text);
}三，自定义通知View
以上通知栏，图标，位置随手机系统规格来。我们也可以自定义通知栏的布局。通过引入xml中定义好的布局，然后更新通知栏的UI。
//显示应用有更新的通知，显示下载进度，下载完成点击后可以安装或其他操作
private void showNotifycation(Context context) {
String title = context.getString(R.string.notify_download_apk);
String text = context.getString(R.string.notify_click_apk_download);
String ticker = title;
Notification n = new Notification(R.drawable.ic_launcher,ticker, System.currentTimeMillis());
Intent clickIntent = new Intent();
clickIntent.setAction(BroadcastUtils.ACTION_NOTIFICATION);
clickIntent.putExtra(BroadcastUtils.CATEGORY,BroadcastUtils.category_apk_download_install);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, clickIntent, PendingIntent.FLAG_UPDATE_CURRENT);
n.setLatestEventInfo(context, title, text, pendingIntent);
n.flags |= Notification.FLAG_AUTO_CANCEL; //点击一次后自动消除
final int hours = new Date().getHours();
LogUtils.debug(TAG,"hours="+hours);
if (hours>=8&&hours<=24) {
n.defaults = Notification.DEFAULT_ALL;
}
NotificationManager nm = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
nm.notify(channel_download_apk, n);
}通过代码可以看出，Notification的使用姿势还是比较简单的，而且通用，暂时没有兼容性问题。我自己用的挺好，是否优雅，自己验证哈。
未完待续，Dusan，Q291902259，欢迎交流。