Move Home settings to Default apps

Change-Id: I2ac7f9dd2c1c505ff3163b2a90c574a360b9409c

src/com/android/settings/applications/DefaultHomePreference.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2016 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;
+
+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.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.pm.UserInfo;
+import android.os.Build;
+import android.os.UserManager;
+import android.util.AttributeSet;
+import com.android.settings.AppListPreference;
+import com.android.settings.R;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class DefaultHomePreference extends AppListPreference {
+
+    private final ArrayList<ComponentName> mAllHomeComponents = new ArrayList<>();
+    private final IntentFilter mHomeFilter;
+
+    public DefaultHomePreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mHomeFilter = new IntentFilter(Intent.ACTION_MAIN);
+        mHomeFilter.addCategory(Intent.CATEGORY_HOME);
+        mHomeFilter.addCategory(Intent.CATEGORY_DEFAULT);
+        refreshHomeOptions();
+    }
+
+    @Override
+    public void performClick() {
+        refreshHomeOptions();
+        super.performClick();
+    }
+
+    @Override
+    protected boolean persistString(String value) {
+        if (value != null) {
+            ComponentName component = ComponentName.unflattenFromString(value);
+            getContext().getPackageManager().replacePreferredActivity(mHomeFilter,
+                    IntentFilter.MATCH_CATEGORY_EMPTY,
+                    mAllHomeComponents.toArray(new ComponentName[0]), component);
+            setSummary(getEntry());
+        }
+        return super.persistString(value);
+    }
+
+    public void refreshHomeOptions() {
+        final String myPkg = getContext().getPackageName();
+        ArrayList<ResolveInfo> homeActivities = new ArrayList<ResolveInfo>();
+        PackageManager pm = getContext().getPackageManager();
+        ComponentName currentDefaultHome  = pm.getHomeActivities(homeActivities);
+        ArrayList<ComponentName> components = new ArrayList<>();
+        mAllHomeComponents.clear();
+        List<CharSequence> summaries = new ArrayList<>();
+
+        boolean mustSupportManagedProfile = hasManagedProfile();
+        for (int i = 0; i < homeActivities.size(); i++) {
+            final ResolveInfo candidate = homeActivities.get(i);
+            final ActivityInfo info = candidate.activityInfo;
+            ComponentName activityName = new ComponentName(info.packageName, info.name);
+            mAllHomeComponents.add(activityName);
+            if (info.packageName.equals(myPkg)) {
+                continue;
+            }
+            components.add(activityName);
+            if (mustSupportManagedProfile && !launcherHasManagedProfilesFeature(candidate, pm)) {
+                summaries.add(getContext().getString(R.string.home_work_profile_not_supported));
+            } else {
+                summaries.add(null);
+            }
+        }
+        setComponentNames(components.toArray(new ComponentName[0]), currentDefaultHome,
+                summaries.toArray(new CharSequence[0]));
+    }
+
+    private boolean launcherHasManagedProfilesFeature(ResolveInfo resolveInfo, PackageManager pm) {
+        try {
+            ApplicationInfo appInfo = pm.getApplicationInfo(
+                    resolveInfo.activityInfo.packageName, 0 /* default flags */);
+            return versionNumberAtLeastL(appInfo.targetSdkVersion);
+        } catch (PackageManager.NameNotFoundException e) {
+            return false;
+        }
+    }
+
+    private boolean versionNumberAtLeastL(int versionNumber) {
+        return versionNumber >= Build.VERSION_CODES.LOLLIPOP;
+    }
+
+    private boolean hasManagedProfile() {
+        UserManager userManager = getContext().getSystemService(UserManager.class);
+        List<UserInfo> profiles = userManager.getProfiles(getContext().getUserId());
+        for (UserInfo userInfo : profiles) {
+            if (userInfo.isManagedProfile()) return true;
+        }
+        return false;
+    }
+
+}