1/*
2 * Copyright (C) 2012 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.camera;
18
19import android.content.BroadcastReceiver;
20import android.content.ComponentName;
21import android.content.Context;
22import android.content.Intent;
23import android.content.pm.PackageManager;
24import android.hardware.Camera.CameraInfo;
25
26import com.android.camera.debug.Log;
27
28// We want to disable camera-related activities if there is no camera. This
29// receiver runs when BOOT_COMPLETED intent is received. After running once
30// this receiver will be disabled, so it will not run again.
31public class DisableCameraReceiver extends BroadcastReceiver {
32    private static final Log.Tag TAG = new Log.Tag("DisableCamRcver");
33    private static final boolean CHECK_BACK_CAMERA_ONLY = true;
34    private static final String ACTIVITIES[] = {
35        "com.android.camera.CameraLauncher",
36    };
37
38    @Override
39    public void onReceive(Context context, Intent intent) {
40        // Disable camera-related activities if there is no camera.
41        boolean needCameraActivity = CHECK_BACK_CAMERA_ONLY
42            ? hasBackCamera()
43            : hasCamera();
44
45        if (!needCameraActivity) {
46            Log.i(TAG, "disable all camera activities");
47            for (int i = 0; i < ACTIVITIES.length; i++) {
48                disableComponent(context, ACTIVITIES[i]);
49            }
50        }
51
52        // Disable this receiver so it won't run again.
53        disableComponent(context, "com.android.camera.DisableCameraReceiver");
54    }
55
56    private boolean hasCamera() {
57        int n = android.hardware.Camera.getNumberOfCameras();
58        Log.i(TAG, "number of camera: " + n);
59        return (n > 0);
60    }
61
62    private boolean hasBackCamera() {
63        int n = android.hardware.Camera.getNumberOfCameras();
64        CameraInfo info = new CameraInfo();
65        for (int i = 0; i < n; i++) {
66            android.hardware.Camera.getCameraInfo(i, info);
67            if (info.facing == CameraInfo.CAMERA_FACING_BACK) {
68                Log.i(TAG, "back camera found: " + i);
69                return true;
70            }
71        }
72        Log.i(TAG, "no back camera");
73        return false;
74    }
75
76    private void disableComponent(Context context, String klass) {
77        ComponentName name = new ComponentName(context, klass);
78        PackageManager pm = context.getPackageManager();
79
80        // We need the DONT_KILL_APP flag, otherwise we will be killed
81        // immediately because we are in the same app.
82        pm.setComponentEnabledSetting(name,
83            PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
84            PackageManager.DONT_KILL_APP);
85    }
86}
87