Disable suggestion on low memory devices

Change-Id: I9d22170845661fc8b48b116c9b09f758926c096f
Fix: 63157777
Test: make RunSettingsRoboTests

src/com/android/settings/dashboard/DashboardSummary.java

@@ -94,9 +94,11 @@ public class DashboardSummary extends InstrumentedFragment
 
         mConditionManager = ConditionManager.get(activity, false);
         getLifecycle().addObserver(mConditionManager);
-        mSuggestionParser = new SuggestionParser(activity,
-                mSuggestionFeatureProvider.getSharedPrefs(activity), R.xml.suggestion_ordering);
-        mSuggestionsChecks = new SuggestionsChecks(getContext());
+        if (mSuggestionFeatureProvider.isSuggestionEnabled(activity)) {
+            mSuggestionParser = new SuggestionParser(activity,
+                    mSuggestionFeatureProvider.getSharedPrefs(activity), R.xml.suggestion_ordering);
+            mSuggestionsChecks = new SuggestionsChecks(getContext());
+        }
         if (DEBUG_TIMING) {
             Log.d(TAG, "onCreate took " + (System.currentTimeMillis() - startTime)
                     + " ms");
@@ -206,11 +208,16 @@ public class DashboardSummary extends InstrumentedFragment
 
     @VisibleForTesting
     void rebuildUI() {
-        new SuggestionLoader().execute();
-        // Set categories on their own if loading suggestions takes too long.
-        mHandler.postDelayed(() -> {
+        if (!mSuggestionFeatureProvider.isSuggestionEnabled(getContext())) {
+            Log.d(TAG, "Suggestion feature is disabled, skipping suggestion entirely");
             updateCategoryAndSuggestion(null /* tiles */);
-        }, MAX_WAIT_MILLIS);
+        } else {
+            new SuggestionLoader().execute();
+            // Set categories on their own if loading suggestions takes too long.
+            mHandler.postDelayed(() -> {
+                updateCategoryAndSuggestion(null /* tiles */);
+            }, MAX_WAIT_MILLIS);
+        }
     }
 
     @Override

src/com/android/settings/dashboard/suggestions/SuggestionFeatureProvider.java

@@ -29,6 +29,11 @@ import java.util.List;
 /** Interface should be implemented if you have added new suggestions */
 public interface SuggestionFeatureProvider {
 
+    /**
+     * Whether or not the whole suggestion feature is enabled.
+     */
+    boolean isSuggestionEnabled(Context context);
+
     /**
      * Returns true if smart suggestion should be used instead of xml based SuggestionParser.
      */

src/com/android/settings/dashboard/suggestions/SuggestionFeatureProviderImpl.java

@@ -16,12 +16,12 @@
 
 package com.android.settings.dashboard.suggestions;
 
+import android.app.ActivityManager;
 import android.content.ComponentName;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
-import android.os.UserHandle;
 import android.provider.Settings.Secure;
 import android.support.annotation.NonNull;
 import android.support.annotation.VisibleForTesting;
@@ -66,6 +66,13 @@ public class SuggestionFeatureProviderImpl implements SuggestionFeatureProvider
     private final MetricsFeatureProvider mMetricsFeatureProvider;
     private final AmbientDisplayConfiguration mAmbientDisplayConfig;
 
+    @Override
+    public boolean isSuggestionEnabled(Context context) {
+        final ActivityManager am =
+                (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
+        return !am.isLowRamDevice();
+    }
+
     @Override
     public boolean isSmartSuggestionEnabled(Context context) {
         return false;