Full screen default app fragment

Fix: 34280137
Test: make RunSettingsRoboTests
Change-Id: Ib44e39589781d68c7952a2c16a44682791a422f1

src/com/android/settings/applications/defaultapps/DefaultHomePreferenceController.java

@@ -0,0 +1,117 @@
+/*
+ * 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.applications.defaultapps;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.pm.ActivityInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.support.v7.preference.Preference;
+import android.text.TextUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class DefaultHomePreferenceController extends DefaultAppPreferenceController {
+
+    static final IntentFilter HOME_FILTER;
+
+    private final String mPackageName;
+
+    static {
+        HOME_FILTER = new IntentFilter(Intent.ACTION_MAIN);
+        HOME_FILTER.addCategory(Intent.CATEGORY_HOME);
+        HOME_FILTER.addCategory(Intent.CATEGORY_DEFAULT);
+    }
+
+    public DefaultHomePreferenceController(Context context) {
+        super(context);
+        mPackageName = mContext.getPackageName();
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return "default_home";
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        final DefaultAppInfo defaultApp = getDefaultAppInfo();
+        final CharSequence defaultAppLabel = defaultApp != null
+                ? defaultApp.loadLabel(mPackageManager.getPackageManager()) : null;
+        if (TextUtils.isEmpty(defaultAppLabel)) {
+            final String onlyAppLabel = getOnlyAppLabel();
+            if (!TextUtils.isEmpty(onlyAppLabel)) {
+                preference.setSummary(onlyAppLabel);
+            }
+        }
+    }
+
+    @Override
+    protected DefaultAppInfo getDefaultAppInfo() {
+        final ArrayList<ResolveInfo> homeActivities = new ArrayList<>();
+        final ComponentName currentDefaultHome = mPackageManager.getHomeActivities(homeActivities);
+
+        return new DefaultAppInfo(mUserId, currentDefaultHome, null /* summary */);
+    }
+
+    private String getOnlyAppLabel() {
+        final List<ResolveInfo> homeActivities = new ArrayList<>();
+        final List<ActivityInfo> appLabels = new ArrayList<>();
+
+        mPackageManager.getHomeActivities(homeActivities);
+        for (ResolveInfo candidate : homeActivities) {
+            final ActivityInfo info = candidate.activityInfo;
+            if (info.packageName.equals(mPackageName)) {
+                continue;
+            }
+            appLabels.add(info);
+        }
+        return appLabels.size() == 1
+                ? appLabels.get(0).loadLabel(mPackageManager.getPackageManager()).toString()
+                : null;
+    }
+
+    public static boolean hasHomePreference(String pkg, Context context) {
+        ArrayList<ResolveInfo> homeActivities = new ArrayList<>();
+        PackageManager pm = context.getPackageManager();
+        pm.getHomeActivities(homeActivities);
+        for (int i = 0; i < homeActivities.size(); i++) {
+            if (homeActivities.get(i).activityInfo.packageName.equals(pkg)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public static boolean isHomeDefault(String pkg, Context context) {
+        ArrayList<ResolveInfo> homeActivities = new ArrayList<>();
+        PackageManager pm = context.getPackageManager();
+        ComponentName def = pm.getHomeActivities(homeActivities);
+
+        return def != null && def.getPackageName().equals(pkg);
+    }
+}