Add memory settings to developer setting.

Bug: 32623105
Test: make RunSettingsRoboTests
Change-Id: I81e38b1ea4e59c330d0eef078af2751b3de739fe

res/xml/development_prefs.xml

@@ -63,6 +63,12 @@
         android:summary="@string/runningservices_settings_summary"
         android:fragment="com.android.settings.applications.RunningServices" />
 
+    <Preference
+        android:key="process_stats"
+        android:title="@string/memory_settings_title"
+        android:icon="@drawable/ic_settings_memory"
+        android:fragment="com.android.settings.applications.ProcessStatsSummary"/>
+
     <PreferenceScreen
         android:key="convert_to_file_encryption"
         android:title="@string/convert_to_file_encryption"

src/com/android/settings/DevelopmentSettings.java

@@ -81,6 +81,7 @@ import android.widget.Toast;
 import com.android.internal.app.LocalePicker;
 import com.android.internal.logging.MetricsProto.MetricsEvent;
 import com.android.settings.applications.BackgroundCheckSummary;
+import com.android.settings.applications.ProcessStatsPreferenceController;
 import com.android.settings.fuelgauge.InactiveApps;
 import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settings.search.Indexable;
@@ -307,6 +308,7 @@ public class DevelopmentSettings extends RestrictedSettingsFragment
     private SwitchPreference mForceResizable;
 
     private SwitchPreference mColorTemperaturePreference;
+    private ProcessStatsPreferenceController mProcessStatsPreferenceController;
 
     private final ArrayList<Preference> mAllPrefs = new ArrayList<Preference>();
 
@@ -360,9 +362,12 @@ public class DevelopmentSettings extends RestrictedSettingsFragment
             setPreferenceScreen(new PreferenceScreen(getPrefContext(), null));
             return;
         }
+        mProcessStatsPreferenceController = new ProcessStatsPreferenceController(getActivity());
 
         addPreferencesFromResource(R.xml.development_prefs);
 
+        mProcessStatsPreferenceController.displayPreference(getPreferenceScreen());
+
         final PreferenceGroup debugDebuggingCategory = (PreferenceGroup)
                 findPreference(DEBUG_DEBUGGING_CATEGORY_KEY);
         mEnableAdb = findAndInitSwitchPref(ENABLE_ADB);

src/com/android/settings/applications/ProcessStatsPreferenceController.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2016 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.applications;
+
+import android.content.Context;
+import android.support.v7.preference.Preference;
+
+import com.android.settings.core.PreferenceController;
+import com.android.settings.dashboard.DashboardFeatureProvider;
+import com.android.settings.overlay.FeatureFactory;
+
+public class ProcessStatsPreferenceController extends PreferenceController {
+
+    private final DashboardFeatureProvider mDashboardFeatureProvider;
+
+    public ProcessStatsPreferenceController(Context context) {
+        super(context);
+        mDashboardFeatureProvider = FeatureFactory.getFactory(context)
+                .getDashboardFeatureProvider(context);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return mDashboardFeatureProvider.isEnabled();
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        return false;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return "process_stats";
+    }
+}

tests/robotests/src/com/android/settings/applications/ProcessStatsPreferenceControllerTest.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2016 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.applications;
+
+import android.content.Context;
+
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.FakeFeatureFactory;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Answers;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.annotation.Config;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Mockito.when;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class ProcessStatsPreferenceControllerTest {
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private Context mContext;
+
+    private FakeFeatureFactory mFactory;
+    private ProcessStatsPreferenceController mController;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        FakeFeatureFactory.setupForTest(mContext);
+
+        mFactory = (FakeFeatureFactory) FakeFeatureFactory.getFactory(mContext);
+
+        mController = new ProcessStatsPreferenceController(mContext);
+    }
+
+    @Test
+    public void testIsAvailble_dashboardFeatureEnabled_shouldReturnTrue() {
+        when(mFactory.dashboardFeatureProvider.isEnabled()).thenReturn(true);
+
+        assertThat(mController.isAvailable()).isTrue();
+    }
+
+    @Test
+    public void testIsAvailble_dashboardFeatureDisabled_shouldReturnFalse() {
+        when(mFactory.dashboardFeatureProvider.isEnabled()).thenReturn(false);
+
+        assertThat(mController.isAvailable()).isFalse();
+    }
+}