Fix legal info back button

Make it its own SettingsPreferenceFragment.

whitespace--

Bug: 20727881
Change-Id: I1f790af03d316c1d43377a6d8606084d9f3a747f

src/com/android/settings/LegalSettings.java

@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2015 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;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.os.Bundle;
+import android.preference.PreferenceGroup;
+import android.provider.SearchIndexableResource;
+
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settings.search.Indexable;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class LegalSettings extends SettingsPreferenceFragment implements Indexable {
+
+    private static final String KEY_TERMS = "terms";
+    private static final String KEY_LICENSE = "license";
+    private static final String KEY_COPYRIGHT = "copyright";
+    private static final String KEY_WEBVIEW_LICENSE = "webview_license";
+
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+        addPreferencesFromResource(R.xml.about_legal);
+
+        final Activity act = getActivity();
+        // These are contained in the "container" preference group
+        PreferenceGroup parentPreference = getPreferenceScreen();
+        Utils.updatePreferenceToSpecificActivityOrRemove(act, parentPreference, KEY_TERMS,
+                Utils.UPDATE_PREFERENCE_FLAG_SET_TITLE_TO_MATCHING_ACTIVITY);
+        Utils.updatePreferenceToSpecificActivityOrRemove(act, parentPreference, KEY_LICENSE,
+                Utils.UPDATE_PREFERENCE_FLAG_SET_TITLE_TO_MATCHING_ACTIVITY);
+        Utils.updatePreferenceToSpecificActivityOrRemove(act, parentPreference, KEY_COPYRIGHT,
+                Utils.UPDATE_PREFERENCE_FLAG_SET_TITLE_TO_MATCHING_ACTIVITY);
+        Utils.updatePreferenceToSpecificActivityOrRemove(act, parentPreference, KEY_WEBVIEW_LICENSE,
+                Utils.UPDATE_PREFERENCE_FLAG_SET_TITLE_TO_MATCHING_ACTIVITY);
+    }
+
+    @Override
+    protected int getMetricsCategory() {
+        return InstrumentedFragment.ABOUT_LEGAL_SETTINGS;
+    }
+
+    public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+        new BaseSearchIndexProvider() {
+
+            @Override
+            public List<SearchIndexableResource> getXmlResourcesToIndex(
+                    Context context, boolean enabled) {
+                final SearchIndexableResource sir = new SearchIndexableResource(context);
+                sir.xmlResId = R.xml.about_legal;
+                return Arrays.asList(sir);
+            }
+
+            @Override
+            public List<String> getNonIndexableKeys(Context context) {
+                final List<String> keys = new ArrayList<String>();
+                if (!checkIntentAction(context, "android.settings.TERMS")) {
+                    keys.add(KEY_TERMS);
+                }
+                if (!checkIntentAction(context, "android.settings.LICENSE")) {
+                    keys.add(KEY_LICENSE);
+                }
+                if (!checkIntentAction(context, "android.settings.COPYRIGHT")) {
+                    keys.add(KEY_COPYRIGHT);
+                }
+                if (!checkIntentAction(context, "android.settings.WEBVIEW_LICENSE")) {
+                    keys.add(KEY_WEBVIEW_LICENSE);
+                }
+                return keys;
+            }
+
+            private boolean checkIntentAction(Context context, String action) {
+                final Intent intent = new Intent(action);
+
+                // Find the activity that is in the system image
+                final PackageManager pm = context.getPackageManager();
+                final List<ResolveInfo> list = pm.queryIntentActivities(intent, 0);
+                final int listSize = list.size();
+
+                for (int i = 0; i < listSize; i++) {
+                    ResolveInfo resolveInfo = list.get(i);
+                    if ((resolveInfo.activityInfo.applicationInfo.flags &
+                            ApplicationInfo.FLAG_SYSTEM) != 0) {
+                        return true;
+                    }
+                }
+
+                return false;
+            }
+    };
+
+}