Add (back) receiver to disable camera.

Bug: 10411981
Change-Id: Icff31d2da466746ef6b00d4be32e92067cebd1f1

2 files changed, 86 insertions, 3 deletions

diff --git a/src/com/android/camera/DisableCameraReceiver.java b/src/com/android/camera/DisableCameraReceiver.java
new file mode 100644
index 000000000..d51d6b9ef
--- /dev/null
+++ b/src/com/android/camera/DisableCameraReceiver.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.camera;
+
+import android.content.BroadcastReceiver;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.hardware.Camera.CameraInfo;
+import android.util.Log;
+
+// We want to disable camera-related activities if there is no camera. This
+// receiver runs when BOOT_COMPLETED intent is received. After running once
+// this receiver will be disabled, so it will not run again.
+public class DisableCameraReceiver extends BroadcastReceiver {
+    private static final String TAG = "G:DisableCameraReceiver";
+    private static final boolean CHECK_BACK_CAMERA_ONLY = true;
+    private static final String ACTIVITIES[] = {
+        "com.android.camera.CameraLauncher",
+    };
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        // Disable camera-related activities if there is no camera.
+        boolean needCameraActivity = CHECK_BACK_CAMERA_ONLY
+            ? hasBackCamera()
+            : hasCamera();
+
+        if (!needCameraActivity) {
+            Log.i(TAG, "disable all camera activities");
+            for (int i = 0; i < ACTIVITIES.length; i++) {
+                disableComponent(context, ACTIVITIES[i]);
+            }
+        }
+
+        // Disable this receiver so it won't run again.
+        disableComponent(context, "com.android.camera.DisableCameraReceiver");
+    }
+
+    private boolean hasCamera() {
+        int n = android.hardware.Camera.getNumberOfCameras();
+        Log.i(TAG, "number of camera: " + n);
+        return (n > 0);
+    }
+
+    private boolean hasBackCamera() {
+        int n = android.hardware.Camera.getNumberOfCameras();
+        CameraInfo info = new CameraInfo();
+        for (int i = 0; i < n; i++) {
+            android.hardware.Camera.getCameraInfo(i, info);
+            if (info.facing == CameraInfo.CAMERA_FACING_BACK) {
+                Log.i(TAG, "back camera found: " + i);
+                return true;
+            }
+        }
+        Log.i(TAG, "no back camera");
+        return false;
+    }
+
+    private void disableComponent(Context context, String klass) {
+        ComponentName name = new ComponentName(context, klass);
+        PackageManager pm = context.getPackageManager();
+
+        // We need the DONT_KILL_APP flag, otherwise we will be killed
+        // immediately because we are in the same app.
+        pm.setComponentEnabledSetting(name,
+            PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
+            PackageManager.DONT_KILL_APP);
+    }
+}
diff --git a/src/com/android/gallery3d/util/GalleryUtils.java b/src/com/android/gallery3d/util/GalleryUtils.java
index 9245e2c5f..c25a2fc66 100644
--- a/src/com/android/gallery3d/util/GalleryUtils.java
+++ b/src/com/android/gallery3d/util/GalleryUtils.java
@@ -238,9 +238,7 @@ public class GalleryUtils {
         ComponentName name = new ComponentName(context, CAMERA_LAUNCHER_NAME);
         int state = pm.getComponentEnabledSetting(name);
         sCameraAvailableInitialized = true;
-        sCameraAvailable =
-            (state == PackageManager.COMPONENT_ENABLED_STATE_DEFAULT)
-             || (state == PackageManager.COMPONENT_ENABLED_STATE_ENABLED);
+        sCameraAvailable = (state == PackageManager.COMPONENT_ENABLED_STATE_ENABLED);
         return sCameraAvailable;
     }