Only allow Settings app launch search result page

Bug: 68199963
Test: robotest
Change-Id: I0018e9c60b0dd46fc2420a563a93b706bf252dc4

src/com/android/settings/search/SearchResultTrampoline.java

@@ -0,0 +1,62 @@
+/*
+ * 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.search;
+
+import static com.android.settings.SettingsActivity.EXTRA_SHOW_FRAGMENT_ARGUMENTS;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+
+import com.android.settings.SettingsActivity;
+import com.android.settings.SubSettings;
+import com.android.settings.overlay.FeatureFactory;
+
+/**
+ * A trampoline activity that launches setting result page.
+ */
+public class SearchResultTrampoline extends Activity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // First make sure caller has privilege to launch a search result page.
+        FeatureFactory.getFactory(this)
+                .getSearchFeatureProvider()
+                .verifyLaunchSearchResultPageCaller(this, getCallingActivity());
+        // Didn't crash, proceed and launch the result as a subsetting.
+        final Intent intent = getIntent();
+
+        // Hack to take EXTRA_FRAGMENT_ARG_KEY from intent and set into
+        // EXTRA_SHOW_FRAGMENT_ARGUMENTS. This is necessary because intent could be from external
+        // caller and args may not persisted.
+        final String settingKey = intent.getStringExtra(SettingsActivity.EXTRA_FRAGMENT_ARG_KEY);
+        final Bundle args = new Bundle();
+        args.putString(SettingsActivity.EXTRA_FRAGMENT_ARG_KEY, settingKey);
+        intent.putExtra(EXTRA_SHOW_FRAGMENT_ARGUMENTS, args);
+
+        // Reroute request to SubSetting.
+        intent.setClass(this /* context */, SubSettings.class)
+                .addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
+        startActivity(intent);
+
+        // Done.
+        finish();
+    }
+
+}