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