一旦服务完成(成功或失败),我将使用android通知来提醒用户,并且该过程完成后,我想删除本地文件。
我的问题是在失败的情况下-我想让用户使用“重试”选项。如果他选择不重试并取消该通知,我想删除为处理目的保存的本地文件(图像...)。
有没有一种方法可以捕获通知的轻扫至撤消事件?
Answers:
DeleteIntent:DeleteIntent是一个PendingIntent对象,可以与通知关联,并在通知被删除时被触发,以此类推:
您可以将“待定意图”设置为广播接收器,然后执行所需的任何操作。
Intent intent = new Intent(this, MyBroadcastReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this.getApplicationContext(), 0, intent, 0);
Builder builder = new Notification.Builder(this):
..... code for your notification
builder.setDeleteIntent(pendingIntent);
MyBroadcastReceiver
public class MyBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
.... code to handle cancel
}
}
完全冲洗掉的答案(感谢我先生的回答):
1)创建一个接收器来处理滑动到关闭事件:
public class NotificationDismissedReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
int notificationId = intent.getExtras().getInt("com.my.app.notificationId");
/* Your code to handle the event here */
}
}
2)在清单中添加一个条目:
<receiver
android:name="com.my.app.receiver.NotificationDismissedReceiver"
android:exported="false" >
</receiver>
3)使用待定意向的唯一ID(在此使用通知ID)创建待定意向,否则,将为每个解雇事件重复使用相同的附加功能:
private PendingIntent createOnDismissedIntent(Context context, int notificationId) {
Intent intent = new Intent(context, NotificationDismissedReceiver.class);
intent.putExtra("com.my.app.notificationId", notificationId);
PendingIntent pendingIntent =
PendingIntent.getBroadcast(context.getApplicationContext(),
notificationId, intent, 0);
return pendingIntent;
}
4)建立通知:
Notification notification = new NotificationCompat.Builder(context)
.setContentTitle("My App")
.setContentText("hello world")
.setWhen(notificationTime)
.setDeleteIntent(createOnDismissedIntent(context, notificationId))
.build();
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(notificationId, notification);
setAutoCancel(true)
,则单击该通知将被取消,并且还会广播删除意图[ developer.android.com/reference/android/support/v4/app/…–
另一个想法:
如果通常创建通知,则还需要执行其中的一项,两项或三项操作。我创建了一个“ NotifyManager”,它创建了我需要的所有通知,还接收了所有Intent调用。因此,我可以在一个地方管理所有动作,也可以捕获关闭事件。
public class NotifyPerformService extends IntentService {
@Inject NotificationManager notificationManager;
public NotifyPerformService() {
super("NotifyService");
...//some Dagger stuff
}
@Override
public void onHandleIntent(Intent intent) {
notificationManager.performNotifyCall(intent);
}
要创建deleteIntent,请使用此方法(在NotificationManager中):
private PendingIntent createOnDismissedIntent(Context context) {
Intent intent = new Intent(context, NotifyPerformMailService.class).setAction("ACTION_NOTIFY_DELETED");
PendingIntent pendingIntent = PendingIntent.getService(context, SOME_NOTIFY_DELETED_ID, intent, 0);
return pendingIntent;
}
和我用来设置删除意图这样(在NotificationManager中):
private NotificationCompat.Builder setNotificationStandardValues(Context context, long when){
String subText = "some string";
NotificationCompat.Builder builder = new NotificationCompat.Builder(context.getApplicationContext());
builder
.setLights(ContextUtils.getResourceColor(R.color.primary) , 1800, 3500) //Set the argb value that you would like the LED on the device to blink, as well as the rate
.setAutoCancel(true) //Setting this flag will make it so the notification is automatically canceled when the user clicks it in the panel.
.setWhen(when) //Set the time that the event occurred. Notifications in the panel are sorted by this time.
.setVibrate(new long[]{1000, 1000}) //Set the vibration pattern to use.
.setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.mipmap.ic_launcher))
.setSmallIcon(R.drawable.ic_white_24dp)
.setGroup(NOTIFY_GROUP)
.setContentInfo(subText)
.setDeleteIntent(createOnDismissedIntent(context))
;
return builder;
}
最后在同一个NotificationManager中是perform函数:
public void performNotifyCall(Intent intent) {
String action = intent.getAction();
boolean success = false;
if(action.equals(ACTION_DELETE)) {
success = delete(...);
}
if(action.equals(ACTION_SHOW)) {
success = showDetails(...);
}
if(action.equals("ACTION_NOTIFY_DELETED")) {
success = true;
}
if(success == false){
return;
}
//some cleaning stuff
}
builder.setAutoCancel(true);
因为当用户单击通知并取消通知时,不会触发删除意图