1 /*
2  * Copyright (C) 2007 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.camera;
18 
19 import android.content.BroadcastReceiver;
20 import android.content.Context;
21 import android.content.Intent;
22 
23 /**
24  * {@code CameraButtonIntentReceiver} is invoked when the camera button is
25  * long-pressed.
26  *
27  * It is declared in {@code AndroidManifest.xml} to receive the
28  * {@code android.intent.action.CAMERA_BUTTON} intent.
29  *
30  * After making sure we can use the camera hardware, it starts the Camera
31  * activity.
32  */
33 public class CameraButtonIntentReceiver extends BroadcastReceiver {
34 
35     @Override
onReceive(Context context, Intent intent)36     public void onReceive(Context context, Intent intent) {
37         // Try to get the camera hardware
38         CameraHolder holder = CameraHolder.instance();
39         ComboPreferences pref = new ComboPreferences(context);
40         int cameraId = CameraSettings.readPreferredCameraId(pref);
41         if (holder.tryOpen(cameraId) == null) return;
42 
43         // We are going to launch the camera, so hold the camera for later use
44         holder.keep();
45         holder.release();
46         Intent i = new Intent(Intent.ACTION_MAIN);
47         i.setClass(context, CameraActivity.class);
48         i.addCategory(Intent.CATEGORY_LAUNCHER);
49         i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
50                 | Intent.FLAG_ACTIVITY_CLEAR_TOP);
51         context.startActivity(i);
52     }
53 }
54