我正在使用安卓通知来告知用户服务的完成情况(成功或失败),并且我想在进程完成后删除本地文件。
我的问题是,如果发生失败 - 我想让用户有“重试”选项。如果他选择不重试和解除通知,则希望删除为处理目的保存的本地文件(图像等)。
有没有办法捕获通知滑动以解除事件?
我的问题是,如果发生失败 - 我想让用户有“重试”选项。如果他选择不重试和解除通知,则希望删除为处理目的保存的本地文件(图像等)。
有没有办法捕获通知滑动以解除事件?
DeleteIntent: DeleteIntent是一个可以与通知关联的PendingIntent对象,当通知被删除时会触发它,删除操作可能是由以下原因引起的:
您可以将Pending Intent设置为广播接收器,然后执行任何想要的操作。
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
}
}
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) 在您的清单(Manifest)中添加一个条目:
<receiver
android:name="com.my.app.receiver.NotificationDismissedReceiver"
android:exported="false" >
</receiver>
3) 使用待定意图的唯一ID(此处使用通知ID)创建待定意图,否则相同的额外信息将被重用于每个解除事件:
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) 构建您的通知:
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)
,那么通知在被点击后将被取消并广播删除意图 [https://developer.android.com/reference/android/support/v4/app/NotificationCompat.Builder.html#setAutoCancel(boolean)]。 - svenpublic 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,请使用以下代码(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;
}
这是我用来设置删除意图的方式(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);
的通知,因为当用户单击通知并且它被取消时,删除意图不会触发。 - devanshu_kaushik