SnapdragonCamera: Fix the SDCard can not access after format SDCard.

Camera app hold SDCard state(SDCard ID). in some case, such as format
SDCard, will caues SDCard remounted and SDCard ID changed in system.
But camera app does not sync the ID with System, so can not access SDCard.

By adding observer and sync SDCard state with system, can fix this issue.

CRs-Fixed: 1006496
Change-Id: Id35564ae77944546a26332a412744e9735780560

1 files changed, 34 insertions, 13 deletions

diff --git a/src/com/android/camera/SDCard.java b/src/com/android/camera/SDCard.java
index 8fda17c67..b88e32245 100644..100755
--- a/src/com/android/camera/SDCard.java
+++ b/src/com/android/camera/SDCard.java
@@ -28,8 +28,10 @@
 
 package com.android.camera;
 
+import android.content.BroadcastReceiver;
 import android.content.Context;
-import android.os.UserHandle;
+import android.content.Intent;
+import android.content.IntentFilter;
 import android.os.Environment;
 import android.os.storage.StorageVolume;
 import android.os.storage.StorageManager;
@@ -42,8 +44,8 @@ public class SDCard {
 
     private StorageManager mStorageManager = null;
     private StorageVolume mVolume = null;
-    private String path = null;
-    private String rawpath = null;
+    private String mPath = null;
+    private String mRawpath = null;
     private static SDCard sSDCard;
 
     public boolean isWriteable() {
@@ -59,20 +61,20 @@ public class SDCard {
         if (mVolume == null) {
             return null;
         }
-        if (path == null) {
-            path = mVolume.getPath() + "/DCIM/Camera";
+        if (mPath == null) {
+            mPath = mVolume.getPath() + "/DCIM/Camera";
         }
-        return path;
+        return mPath;
     }
 
     public String getRawDirectory() {
         if (mVolume == null) {
             return null;
         }
-        if (rawpath == null) {
-            rawpath = mVolume.getPath() + "/DCIM/Camera/raw";
+        if (mRawpath == null) {
+            mRawpath = mVolume.getPath() + "/DCIM/Camera/raw";
         }
-        return rawpath;
+        return mRawpath;
     }
 
     public static void initialize(Context context) {
@@ -92,13 +94,32 @@ public class SDCard {
     private SDCard(Context context) {
         try {
             mStorageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);
-            final StorageVolume[] volumes = mStorageManager.getVolumeList();
-            if (volumes.length > VOLUME_SDCARD_INDEX) {
-                mVolume = volumes[VOLUME_SDCARD_INDEX];
-            }
+            initVolume();
+            registerMediaBroadcastreceiver(context);
         } catch (Exception e) {
             Log.e(TAG, "couldn't talk to MountService", e);
         }
     }
 
+    private void initVolume() {
+        final StorageVolume[] volumes = mStorageManager.getVolumeList();
+        mVolume = (volumes.length > VOLUME_SDCARD_INDEX) ?
+                volumes[VOLUME_SDCARD_INDEX] : null;
+        mPath = null;
+        mRawpath = null;
+    }
+
+    private void registerMediaBroadcastreceiver(Context context) {
+        IntentFilter filter = new IntentFilter(Intent.ACTION_MEDIA_MOUNTED);
+        filter.addAction(Intent.ACTION_MEDIA_UNMOUNTED);
+        filter.addDataScheme("file");
+        context.registerReceiver(mMediaBroadcastReceiver , filter);
+    }
+
+    private BroadcastReceiver mMediaBroadcastReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            initVolume();
+        }
+    };
 }