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
17package com.android.managedprovisioning;
18
19import android.app.Activity;
20import android.content.Context;
21import android.content.Intent;
22import android.os.Bundle;
23
24
25/**
26 * A trampoline activity that starts a real activity in a new task. This is used so that we can call
27 * startActivityForResult() to start the real activity, from a non-activity context. The target
28 * activity can the check the caller by {@link Activity#getCallingPackage} or
29 * {@link Activity#getCallingActivity}.
30 */
31public class TrampolineActivity extends Activity {
32    private static final String EXTRA_INTENT = "intent";
33    @Override
34    protected void onCreate(Bundle savedInstanceState) {
35        super.onCreate(savedInstanceState);
36        Intent target = (Intent) getIntent().getParcelableExtra(EXTRA_INTENT);
37        if (target != null) {
38            // So that the target activity can get caller information via
39            // {@link Activity#getCallingPackage}.
40            startActivityForResult(target, 0);
41        }
42        finish();
43    }
44
45    public static void startActivity(Context context, Intent target) {
46        Intent intent = new Intent(context, TrampolineActivity.class);
47        intent.putExtra(EXTRA_INTENT, target);
48        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
49        context.startActivity(intent);
50    }
51}
52