我可以找到一种方法将参数从我的通知发送到我的活动。
I have a service that creates a notification. When the user clicks on the notification I want to open my main activity with some special parameters. E.g an item id, so my activity can load and present a special item detail view. More specific, I'm downloading a file, and when the file is downloaded I want the notification to have an intent that when clicked it opens my activity in a special mode. I have tried to use putExtra on my intent, but cant seem to extract it, so I think I'm doing it wrong.
我的服务中创建通知的代码:
// construct the Notification object.
final Notification notif = new Notification(R.drawable.icon, tickerText, System.currentTimeMillis());
final RemoteViews contentView = new RemoteViews(context.getPackageName(), R.layout.custom_notification_layout);
contentView.setImageViewResource(R.id.image, R.drawable.icon);
contentView.setTextViewText(R.id.text, tickerText);
contentView.setProgressBar(R.id.progress,100,0, false);
notif.contentView = contentView;
Intent notificationIntent = new Intent(context, Main.class);
notificationIntent.putExtra("item_id", "1001"); // <-- HERE I PUT THE EXTRA VALUE
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
notif.contentIntent = contentIntent;
nm.notify(id, notif);
从我的活动中试图从通知中获取额外参数的代码:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Bundle extras = getIntent().getExtras();
if(extras != null){
Log.i( "dd","Extra:" + extras.getString("item_id") );
}
额外的总是空的，我从来没有得到任何东西到我的日志。
顺便说一句……onCreate只在我的活动开始时运行，如果我的活动已经开始，我也想收集额外的内容，并根据我收到的item_id呈现我的活动。
什么好主意吗?
我有类似的问题，我的应用程序显示消息通知。
当有多个通知并单击每个通知时，它将在视图消息活动中显示该通知详细信息。我解决了相同的额外参数正在接收的问题，在查看消息的意图。
下面是修复这个问题的代码。
创建通知Intent的代码。
Intent notificationIntent = new Intent(getApplicationContext(), viewmessage.class);
notificationIntent.putExtra("NotificationMessage", notificationMessage);
notificationIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingNotificationIntent = PendingIntent.getActivity(getApplicationContext(),notificationIndex,notificationIntent,PendingIntent.FLAG_UPDATE_CURRENT);
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notification.setLatestEventInfo(getApplicationContext(), notificationTitle, notificationMessage, pendingNotificationIntent);
查看消息活动的代码。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
onNewIntent(getIntent());
}
@Override
public void onNewIntent(Intent intent){
Bundle extras = intent.getExtras();
if(extras != null){
if(extras.containsKey("NotificationMessage"))
{
setContentView(R.layout.viewmain);
// extract the extra-data in the Notification
String msg = extras.getString("NotificationMessage");
txtView = (TextView) findViewById(R.id.txtMessage);
txtView.setText(msg);
}
}
}
在你的通知实现中，使用这样的代码:
NotificationCompat.Builder nBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
...
Intent intent = new Intent(this, ExampleActivity.class);
intent.putExtra("EXTRA_KEY", "value");
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
nBuilder.setContentIntent(pendingIntent);
...
要在ExampleActivity中获取Intent额外值，使用以下代码:
...
Intent intent = getIntent();
if(intent!=null) {
String extraKey = intent.getStringExtra("EXTRA_KEY");
}
...
非常重要的注意:Intent::putExtra()方法是一个重载方法。要获得额外的键，你需要使用Intent::get[Type] extra()方法。
注意:NOTIFICATION_ID和NOTIFICATION_CHANNEL_ID是在ExampleActivity中声明的常量
