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 26 import 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. 31 public 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
