How to Enable Multi-Window in Marshmallow.

Go back to Settings > Developer Options > go to the bottom of the Drawing category and enable Multi-window from the options.

Enable multi-window on ODROID-C2.

How to write to external storage on odroid(marshmallow android 6.0.1).

You maybe install utorrent app, but you can't download torrent file in external storage installed android 6.0.1(marshmallow).

Edit packages.xml.

$ su
# vi /data/system/packages.xml

<package name="com.utorrent.client" codePath="/data/app/com.utorrent.client-1" nativeLibraryPath="/data/app/com.utorrent.client-1/lib" primaryCpuAbi="armeabi-v7a" publicFlags="940097092" privateFlags="0" ft="15a648b6388" it="15a648b6f1f" ut="15a648b6f1f" version="245" userId="10069" installer="com.android.vending">
        ...
        <perms>
            ...
            <item name="android.permission.ACCESS_WIFI_STATE" granted="true" flags="0" />
            <item name="android.permission.WAKE_LOCK" granted="true" flags="0" />
            <item name="android.permission.WRITE_MEDIA_STORAGE" granted="true" flags="0" />
        </perms>


or hacking frameworks.


diff --git a/services/core/java/com/android/server/pm/Settings.java b/services/core/java/com/android/server/pm/Settings.java
index 647c17b..1ec1fe7 100644
--- a/services/core/java/com/android/server/pm/Settings.java
+++ b/services/core/java/com/android/server/pm/Settings.java
@@ -22,6 +22,7 @@ import static android.content.pm.PackageManager.COMPONENT_ENABLED_STATE_DISABLED
 import static android.content.pm.PackageManager.COMPONENT_ENABLED_STATE_DISABLED_USER;
 import static android.content.pm.PackageManager.COMPONENT_ENABLED_STATE_ENABLED;
 import static android.Manifest.permission.READ_EXTERNAL_STORAGE;
+import static android.Manifest.permission.WRITE_MEDIA_STORAGE;
 import static android.content.pm.PackageManager.INTENT_FILTER_DOMAIN_VERIFICATION_STATUS_ALWAYS;
 import static android.content.pm.PackageManager.INTENT_FILTER_DOMAIN_VERIFICATION_STATUS_NEVER;
 import static android.content.pm.PackageManager.INTENT_FILTER_DOMAIN_VERIFICATION_STATUS_UNDEFINED;
@@ -1935,6 +1936,8 @@ final class Settings {
             return;
         }

+        boolean isMediaStoragePermission = false;
+
         serializer.startTag(null, TAG_PERMISSIONS);

         for (PermissionState permissionState : permissionStates) {
@@ -1943,6 +1946,19 @@ final class Settings {
             serializer.attribute(null, ATTR_GRANTED, String.valueOf(permissionState.isGranted()));
             serializer.attribute(null, ATTR_FLAGS, Integer.toHexString(permissionState.getFlags()));
             serializer.endTag(null, TAG_ITEM);
+
+            if (!isMediaStoragePermission
+                    && permissionState.getName().equals(WRITE_MEDIA_STORAGE)) {
+                isMediaStoragePermission = true;
+            }
+        }
+
+        if (!isMediaStoragePermission) {
+            serializer.startTag(null, TAG_ITEM);
+            serializer.attribute(null, ATTR_NAME, WRITE_MEDIA_STORAGE);
+            serializer.attribute(null, ATTR_GRANTED, "true");
+            serializer.attribute(null, ATTR_FLAGS, Integer.toHexString(0));
+            serializer.endTag(null, TAG_ITEM);
         }

         serializer.endTag(null, TAG_PERMISSIONS);

Automatically permission string is inserted in packages.xml.


After install app from Market you must reboot system.

How to install apps into SD card on ODROID-C2 marshmallow.

Install android 6.0.1 into 8GByte eMMC.

http://odroid.com/dokuwiki/doku.php?id=en:c2_release_android

5GByte userdata.

Install many apps.

storage space running out.

Insert SD Card.

Use as internal storage.

Enable sdcard like internal storage.

Settings -> Apps -> Storage

Move "Angry Birds" to "SanDisk SD card".