1 /*
2  * Copyright 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package androidx.navigation;
18 
19 
20 import android.os.Bundle;
21 import android.support.annotation.IdRes;
22 import android.support.annotation.Nullable;
23 
24 /**
25  * An interface that describes a navigation operation: action's id and arguments
26  */
27 public interface NavDirections {
28 
29     /**
30      * Returns a action id to navigate with.
31      *
32      * @return id of an action
33      */
34     @IdRes
getActionId()35     int getActionId();
36 
37     /**
38      * Returns arguments to pass to the destination
39      */
40     @Nullable
getArguments()41     Bundle getArguments();
42 }
43