Merge "Don't crash on opening ejecting USB." into oc-dev

am: 32f95292bf

Change-Id: Iaceb5e9ec424cf8dc175ab4d2645c50eacc86408

src/com/android/settings/deviceinfo/PublicVolumeSettings.java

@@ -98,7 +98,9 @@ public class PublicVolumeSettings extends SettingsPreferenceFragment {
             mVolume = mStorageManager.findVolumeByUuid(fsUuid);
         } else {
             final String volId = getArguments().getString(VolumeInfo.EXTRA_VOLUME_ID);
-            mVolume = mStorageManager.findVolumeById(volId);
+            if (volId != null) {
+                mVolume = mStorageManager.findVolumeById(volId);
+            }
         }
 
         if (!isVolumeValid()) {
@@ -129,6 +131,12 @@ public class PublicVolumeSettings extends SettingsPreferenceFragment {
     @Override
     public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
+
+        // If the volume isn't valid, we are not scaffolded to set up a view.
+        if (!isVolumeValid()) {
+            return;
+        }
+
         final Resources resources = getResources();
         final int padding = resources.getDimensionPixelSize(
                 R.dimen.unmount_button_padding);

tests/unit/src/com/android/settings/deviceinfo/PublicVolumeSettingsTest.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2017 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.settings.deviceinfo;
+
+import android.content.Intent;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.filters.SmallTest;
+import android.support.test.rule.ActivityTestRule;
+import android.support.test.runner.AndroidJUnit4;
+
+import com.android.settings.Settings;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class PublicVolumeSettingsTest {
+    @Rule
+    public ActivityTestRule<Settings.PublicVolumeSettingsActivity> mActivityRule =
+            new ActivityTestRule<>(Settings.PublicVolumeSettingsActivity.class, true, true);
+
+    @Test
+    public void test_invalidSetupDoesNotCrashSettings() {
+        Intent intent = new Intent();
+        intent.setAction(android.provider.Settings.ACTION_INTERNAL_STORAGE_SETTINGS);
+        intent.setClassName(InstrumentationRegistry.getTargetContext().getPackageName(),
+                Settings.PublicVolumeSettingsActivity.class.getName());
+        mActivityRule.launchActivity(intent);
+
+        // Should exit gracefully without crashing.
+    }
+}