Fallback to default wallpaper picker if first choice fails

- Add fallback logic in WallpaperSuggestionActivity
- Move some classes around
- Delete some unused class

Change-Id: Ifc8864428647a94f3ecae50d193c2156b2592ff3
Fix: 36140287
Test: make RunSettingsRoboTests

src/com/android/settings/wallpaper/WallpaperSuggestionActivity.java

@@ -0,0 +1,56 @@
+/*
+ * 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.wallpaper;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.os.Bundle;
+import android.support.annotation.VisibleForTesting;
+
+import com.android.internal.logging.nano.MetricsProto;
+import com.android.settings.R;
+import com.android.settings.Utils;
+
+public class WallpaperSuggestionActivity extends Activity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        final PackageManager pm = getPackageManager();
+        final Intent intent = new Intent()
+                .setClassName(getString(R.string.config_wallpaper_picker_package),
+                        getString(R.string.config_wallpaper_picker_class))
+                .addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
+        if (pm.resolveActivity(intent, 0) != null) {
+            startActivity(intent);
+        } else {
+            startFallbackSuggestion();
+        }
+
+        finish();
+    }
+
+    @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
+    void startFallbackSuggestion() {
+        // fall back to default wallpaper picker
+        Utils.startWithFragment(this, WallpaperTypeSettings.class.getName(), null, null, 0,
+                R.string.wallpaper_suggestion_title, null,
+                MetricsProto.MetricsEvent.DASHBOARD_SUMMARY);
+    }
+
+}

src/com/android/settings/wallpaper/WallpaperTypeSettings.java

@@ -0,0 +1,112 @@
+/*
+ * 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.wallpaper;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.os.Bundle;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
+import com.android.settings.R;
+import com.android.settings.SettingsPreferenceFragment;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settings.search.Indexable;
+import com.android.settings.search.SearchIndexableRaw;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class WallpaperTypeSettings extends SettingsPreferenceFragment implements Indexable {
+
+    @Override
+    public int getMetricsCategory() {
+        return MetricsEvent.WALLPAPER_TYPE;
+    }
+
+    @Override
+    protected int getHelpResource() {
+        return R.string.help_uri_wallpaper;
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        addPreferencesFromResource(R.xml.wallpaper_settings);
+        populateWallpaperTypes();
+    }
+
+    private void populateWallpaperTypes() {
+        // Search for activities that satisfy the ACTION_SET_WALLPAPER action
+        final Intent intent = new Intent(Intent.ACTION_SET_WALLPAPER);
+        final PackageManager pm = getPackageManager();
+        final List<ResolveInfo> rList = pm.queryIntentActivities(intent,
+                PackageManager.MATCH_DEFAULT_ONLY);
+
+        final PreferenceScreen parent = getPreferenceScreen();
+        parent.setOrderingAsAdded(false);
+        // Add Preference items for each of the matching activities
+        for (ResolveInfo info : rList) {
+            Preference pref = new Preference(getPrefContext());
+            pref.setLayoutResource(R.layout.preference_wallpaper_type);
+            Intent prefIntent = new Intent(intent);
+            prefIntent.setComponent(new ComponentName(
+                    info.activityInfo.packageName, info.activityInfo.name));
+            pref.setIntent(prefIntent);
+            CharSequence label = info.loadLabel(pm);
+            if (label == null) label = info.activityInfo.packageName;
+            pref.setTitle(label);
+            pref.setIcon(info.loadIcon(pm));
+            parent.addPreference(pref);
+        }
+    }
+
+    public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+        new BaseSearchIndexProvider() {
+            @Override
+            public List<SearchIndexableRaw> getRawDataToIndex(Context context, boolean enabled) {
+                final List<SearchIndexableRaw> result = new ArrayList<SearchIndexableRaw>();
+
+                final Intent intent = new Intent(Intent.ACTION_SET_WALLPAPER);
+                final PackageManager pm = context.getPackageManager();
+                final List<ResolveInfo> rList = pm.queryIntentActivities(intent,
+                        PackageManager.MATCH_DEFAULT_ONLY);
+
+                // Add indexable data for each of the matching activities
+                for (ResolveInfo info : rList) {
+                    CharSequence label = info.loadLabel(pm);
+                    if (label == null) label = info.activityInfo.packageName;
+
+                    SearchIndexableRaw data = new SearchIndexableRaw(context);
+                    data.title = label.toString();
+                    data.screenTitle = context.getResources().getString(
+                            R.string.wallpaper_settings_fragment_title);
+                    data.intentAction = Intent.ACTION_SET_WALLPAPER;
+                    data.intentTargetPackage = info.activityInfo.packageName;
+                    data.intentTargetClass = info.activityInfo.name;
+                    result.add(data);
+                }
+
+                return result;
+            }
+        };
+}