Move date/time prefs to PreferenceController and add tests.

Bug: 32996243
Test: RunSettingsRoboTests
Change-Id: Ie537bbcc35a96a63251e46f84b57c0a861b9d013

src/com/android/settings/datetime/DatePreferenceController.java

@@ -0,0 +1,117 @@
+/*
+ * 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.datetime;
+
+import android.app.Activity;
+import android.app.AlarmManager;
+import android.app.DatePickerDialog;
+import android.content.Context;
+import android.support.annotation.VisibleForTesting;
+import android.support.v7.preference.Preference;
+import android.text.TextUtils;
+import android.text.format.DateFormat;
+import android.widget.DatePicker;
+
+import com.android.settings.core.PreferenceController;
+
+import java.util.Calendar;
+
+public class DatePreferenceController extends PreferenceController implements
+        DatePickerDialog.OnDateSetListener {
+
+    public interface DatePreferenceHost extends UpdateTimeAndDateCallback {
+        void showDatePicker();
+    }
+
+    public static final int DIALOG_DATEPICKER = 0;
+
+    private static final String KEY_DATE = "date";
+
+    private final DatePreferenceHost mHost;
+    private final AutoTimePreferenceController mAutoTimePreferenceController;
+
+    public DatePreferenceController(Context context, DatePreferenceHost host,
+            AutoTimePreferenceController autoTimePreferenceController) {
+        super(context);
+        mHost = host;
+        mAutoTimePreferenceController = autoTimePreferenceController;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        final Calendar now = Calendar.getInstance();
+        preference.setSummary(DateFormat.getLongDateFormat(mContext).format(now.getTime()));
+        preference.setEnabled(!mAutoTimePreferenceController.isEnabled());
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        if (!TextUtils.equals(preference.getKey(), KEY_DATE)) {
+            return false;
+        }
+        mHost.showDatePicker();
+        return true;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_DATE;
+    }
+
+    @Override
+    public void onDateSet(DatePicker view, int year, int month, int day) {
+        setDate(year, month, day);
+        mHost.updateTimeAndDateDisplay(mContext);
+    }
+
+    public DatePickerDialog buildDatePicker(Activity activity) {
+        final Calendar calendar = Calendar.getInstance();
+        final DatePickerDialog d = new DatePickerDialog(
+                activity,
+                this,
+                calendar.get(Calendar.YEAR),
+                calendar.get(Calendar.MONTH),
+                calendar.get(Calendar.DAY_OF_MONTH));
+        // The system clock can't represent dates outside this range.
+        calendar.clear();
+        calendar.set(2007, Calendar.JANUARY, 1);
+        d.getDatePicker().setMinDate(calendar.getTimeInMillis());
+        calendar.clear();
+        calendar.set(2037, Calendar.DECEMBER, 31);
+        d.getDatePicker().setMaxDate(calendar.getTimeInMillis());
+        return d;
+    }
+
+    @VisibleForTesting
+    void setDate(int year, int month, int day) {
+        Calendar c = Calendar.getInstance();
+
+        c.set(Calendar.YEAR, year);
+        c.set(Calendar.MONTH, month);
+        c.set(Calendar.DAY_OF_MONTH, day);
+        long when = Math.max(c.getTimeInMillis(), DatePreferenceHost.MIN_DATE);
+
+        if (when / 1000 < Integer.MAX_VALUE) {
+            ((AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE)).setTime(when);
+        }
+    }
+}