1 /*
2  * Copyright 2015, 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 com.android.managedprovisioning;
18 
19 import android.app.Activity;
20 import android.content.Context;
21 import android.content.Intent;
22 import android.os.Bundle;
23 
24 import com.android.managedprovisioning.common.TransitionHelper;
25 
26 
27 /**
28  * A trampoline activity that starts a real activity in a new task. This is used so that we can call
29  * startActivityForResult() to start the real activity, from a non-activity context. The target
30  * activity can the check the caller by {@link Activity#getCallingPackage} or
31  * {@link Activity#getCallingActivity}.
32  */
33 public class TrampolineActivity extends Activity {
34     private static final String EXTRA_INTENT = "intent";
35     private final TransitionHelper mTransitionHelper = new TransitionHelper();
36 
37     @Override
onCreate(Bundle savedInstanceState)38     protected void onCreate(Bundle savedInstanceState) {
39         mTransitionHelper.applyContentScreenTransitions(this);
40         super.onCreate(savedInstanceState);
41         Intent target = (Intent) getIntent().getParcelableExtra(EXTRA_INTENT);
42         if (target != null) {
43             // So that the target activity can get caller information via
44             // {@link Activity#getCallingPackage}.
45             mTransitionHelper.startActivityForResultWithTransition(
46                     this, target, /* requestCode= */ 0);
47         }
48         mTransitionHelper.finishActivity(this);
49     }
50 
createIntent(Context context, Intent target)51     public static Intent createIntent(Context context, Intent target) {
52         Intent intent = new Intent(context, TrampolineActivity.class);
53         intent.putExtra(EXTRA_INTENT, target);
54         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
55         return intent;
56     }
57 }
58