Check isDestroyed after finishing async HandleRootsChangedTask.

HandleRootsChangedTask will be finished after the Activity is destroyed,
though we no longer to be able to change the directory at that time.

BUG=26454277

Change-Id: Ia414134c80d900ef2e6c382fdd9209a154d940af

parent 32e05a45

src/com/android/documentsui/BaseActivity.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -630,7 +630,7 @@ public abstract class BaseActivity extends Activity {

		@Override
		protected void onPostExecute(RootInfo homeRoot) {
		if (homeRoot != null && mHome != null) {
		if (homeRoot != null && mHome != null && !isDestroyed()) {
		// Clear entire backstack and start in new root
		mState.onRootChanged(homeRoot);
		mSearchManager.update(homeRoot);