Full screen default app fragment

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

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

@@ -0,0 +1,101 @@
+/*
+ * 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.ContentResolver;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.provider.Settings;
+import android.text.TextUtils;
+
+import com.android.internal.logging.nano.MetricsProto;
+import com.android.settings.R;
+import com.android.settings.Utils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class DefaultEmergencyPicker extends DefaultAppPickerFragment {
+
+    @Override
+    public int getMetricsCategory() {
+        return MetricsProto.MetricsEvent.DEFAULT_EMERGENCY_APP_PICKER;
+    }
+
+    @Override
+    protected List<DefaultAppInfo> getCandidates() {
+        final List<DefaultAppInfo> candidates = new ArrayList<>();
+        final List<ResolveInfo> infos = mPm.getPackageManager().queryIntentActivities(
+                DefaultEmergencyPreferenceController.QUERY_INTENT, 0);
+        PackageInfo bestMatch = null;
+        for (ResolveInfo info : infos) {
+            try {
+                final PackageInfo packageInfo =
+                        mPm.getPackageManager().getPackageInfo(info.activityInfo.packageName, 0);
+                final ApplicationInfo appInfo = packageInfo.applicationInfo;
+                candidates.add(new DefaultAppInfo(appInfo));
+                // Get earliest installed system app.
+                if (isSystemApp(appInfo) && (bestMatch == null ||
+                        bestMatch.firstInstallTime > packageInfo.firstInstallTime)) {
+                    bestMatch = packageInfo;
+                }
+            } catch (PackageManager.NameNotFoundException e) {
+                // Skip unknown packages.
+            }
+            if (bestMatch != null) {
+                final String defaultKey = getDefaultAppKey();
+                if (TextUtils.isEmpty(defaultKey)) {
+                    setDefaultAppKey(bestMatch.packageName);
+                }
+            }
+        }
+        return candidates;
+    }
+
+    @Override
+    protected String getConfirmationMessage(DefaultAppInfo info) {
+        return Utils.isPackageDirectBootAware(getContext(), info.getKey()) ? null
+                : getContext().getString(R.string.direct_boot_unaware_dialog_message);
+    }
+
+    @Override
+    protected String getDefaultAppKey() {
+        return Settings.Secure.getString(getContext().getContentResolver(),
+                Settings.Secure.EMERGENCY_ASSISTANCE_APPLICATION);
+    }
+
+    @Override
+    protected boolean setDefaultAppKey(String key) {
+        final ContentResolver contentResolver = getContext().getContentResolver();
+        final String previousValue = Settings.Secure.getString(contentResolver,
+                Settings.Secure.EMERGENCY_ASSISTANCE_APPLICATION);
+
+        if (!TextUtils.isEmpty(key) && !TextUtils.equals(key, previousValue)) {
+            Settings.Secure.putString(contentResolver,
+                    Settings.Secure.EMERGENCY_ASSISTANCE_APPLICATION,
+                    key);
+            return true;
+        }
+        return false;
+    }
+
+    private boolean isSystemApp(ApplicationInfo info) {
+        return info != null && (info.flags & ApplicationInfo.FLAG_SYSTEM) != 0;
+    }
+}