SnapdragonCamera: Switch to SD card when internal storage is full

When internal storage is full, switch to SD card for storage.
Change the save path from internal storage to SD card when
updateStorageSpace is called if:
1. Internal storage is the current save path and does not have
   enough space
2. SD card has enough space

Display a toast message and update display of the save path menu
item when the storage path is switched.

CRs-Fixed: 687210

Change-Id: I6a9804e4f64e6d55c6aebd889ac2ce5e887cfa5a

1 files changed, 44 insertions, 25 deletions

diff --git a/src/com/android/camera/Storage.java b/src/com/android/camera/Storage.java
index d27cf259f..53950f2f2 100644
--- a/src/com/android/camera/Storage.java
+++ b/src/com/android/camera/Storage.java
@@ -216,8 +216,8 @@ public class Storage {
         }
     }
 
-    public static long getAvailableSpace() {
-        if (isSaveSDCard() && SDCard.instance().isWriteable()) {
+    private static long getSDCardAvailableSpace() {
+        if (SDCard.instance().isWriteable()) {
             File dir = new File(SDCard.instance().getDirectory());
             dir.mkdirs();
             try {
@@ -227,32 +227,51 @@ public class Storage {
             } catch (Exception e) {
             }
             return UNKNOWN_SIZE;
-        } else if (isSaveSDCard() && !SDCard.instance().isWriteable()) {
-            return UNKNOWN_SIZE;
-        } else {
-            String state = Environment.getExternalStorageState();
-            Log.d(TAG, "External storage state=" + state);
-            if (Environment.MEDIA_CHECKING.equals(state)) {
-                return PREPARING;
-            }
-            if (!Environment.MEDIA_MOUNTED.equals(state)) {
-                return UNAVAILABLE;
-            }
+        }
+        return UNKNOWN_SIZE;
+    }
 
-            File dir = new File(DIRECTORY);
-            dir.mkdirs();
-            if (!dir.isDirectory() || !dir.canWrite()) {
-                return UNAVAILABLE;
-            }
+    private static long getInternalStorageAvailableSpace() {
+        String state = Environment.getExternalStorageState();
+        Log.d(TAG, "External storage state=" + state);
+        if (Environment.MEDIA_CHECKING.equals(state)) {
+            return PREPARING;
+        }
+        if (!Environment.MEDIA_MOUNTED.equals(state)) {
+            return UNAVAILABLE;
+        }
 
-            try {
-                StatFs stat = new StatFs(DIRECTORY);
-                return stat.getAvailableBlocks() * (long) stat.getBlockSize();
-            } catch (Exception e) {
-                Log.i(TAG, "Fail to access external storage", e);
-            }
-            return UNKNOWN_SIZE;
+        File dir = new File(DIRECTORY);
+        dir.mkdirs();
+        if (!dir.isDirectory() || !dir.canWrite()) {
+            return UNAVAILABLE;
+        }
+
+        try {
+            StatFs stat = new StatFs(DIRECTORY);
+            return stat.getAvailableBlocks() * (long) stat.getBlockSize();
+        } catch (Exception e) {
+            Log.i(TAG, "Failed to access external storage", e);
+        }
+        return UNKNOWN_SIZE;
+    }
+
+    public static long getAvailableSpace() {
+        if (isSaveSDCard()) {
+            return getSDCardAvailableSpace();
+        } else {
+            return getInternalStorageAvailableSpace();
+        }
+    }
+
+    public static boolean switchSavePath() {
+        if (!isSaveSDCard()
+                && getInternalStorageAvailableSpace() <= LOW_STORAGE_THRESHOLD_BYTES
+                && getSDCardAvailableSpace() > LOW_STORAGE_THRESHOLD_BYTES) {
+            setSaveSDCard(true);
+            return true;
         }
+        return false;
     }
 
     /**