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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.systemui.statusbar.policy;
     18 
     19 import android.content.BroadcastReceiver;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.IntentFilter;
     23 import android.content.res.TypedArray;
     24 import android.icu.text.DateFormat;
     25 import android.icu.text.DisplayContext;
     26 import android.text.TextUtils;
     27 import android.util.AttributeSet;
     28 import android.widget.TextView;
     29 
     30 import com.android.systemui.Dependency;
     31 import com.android.systemui.R;
     32 
     33 import java.util.Date;
     34 import java.util.Locale;
     35 
     36 public class DateView extends TextView {
     37     private static final String TAG = "DateView";
     38 
     39     private final Date mCurrentTime = new Date();
     40 
     41     private DateFormat mDateFormat;
     42     private String mLastText;
     43     private String mDatePattern;
     44 
     45     private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
     46         @Override
     47         public void onReceive(Context context, Intent intent) {
     48             final String action = intent.getAction();
     49             if (Intent.ACTION_TIME_TICK.equals(action)
     50                     || Intent.ACTION_TIME_CHANGED.equals(action)
     51                     || Intent.ACTION_TIMEZONE_CHANGED.equals(action)
     52                     || Intent.ACTION_LOCALE_CHANGED.equals(action)) {
     53                 if (Intent.ACTION_LOCALE_CHANGED.equals(action)
     54                         || Intent.ACTION_TIMEZONE_CHANGED.equals(action)) {
     55                     // need to get a fresh date format
     56                     getHandler().post(() -> mDateFormat = null);
     57                 }
     58                 getHandler().post(() -> updateClock());
     59             }
     60         }
     61     };
     62 
     63     public DateView(Context context, AttributeSet attrs) {
     64         super(context, attrs);
     65         TypedArray a = context.getTheme().obtainStyledAttributes(
     66                 attrs,
     67                 R.styleable.DateView,
     68                 0, 0);
     69 
     70         try {
     71             mDatePattern = a.getString(R.styleable.DateView_datePattern);
     72         } finally {
     73             a.recycle();
     74         }
     75         if (mDatePattern == null) {
     76             mDatePattern = getContext().getString(R.string.system_ui_date_pattern);
     77         }
     78     }
     79 
     80     @Override
     81     protected void onAttachedToWindow() {
     82         super.onAttachedToWindow();
     83 
     84         IntentFilter filter = new IntentFilter();
     85         filter.addAction(Intent.ACTION_TIME_TICK);
     86         filter.addAction(Intent.ACTION_TIME_CHANGED);
     87         filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
     88         filter.addAction(Intent.ACTION_LOCALE_CHANGED);
     89         getContext().registerReceiver(mIntentReceiver, filter, null,
     90                 Dependency.get(Dependency.TIME_TICK_HANDLER));
     91 
     92         updateClock();
     93     }
     94 
     95     @Override
     96     protected void onDetachedFromWindow() {
     97         super.onDetachedFromWindow();
     98 
     99         mDateFormat = null; // reload the locale next time
    100         getContext().unregisterReceiver(mIntentReceiver);
    101     }
    102 
    103     protected void updateClock() {
    104         if (mDateFormat == null) {
    105             final Locale l = Locale.getDefault();
    106             DateFormat format = DateFormat.getInstanceForSkeleton(mDatePattern, l);
    107             format.setContext(DisplayContext.CAPITALIZATION_FOR_STANDALONE);
    108             mDateFormat = format;
    109         }
    110 
    111         mCurrentTime.setTime(System.currentTimeMillis());
    112 
    113         final String text = mDateFormat.format(mCurrentTime);
    114         if (!text.equals(mLastText)) {
    115             setText(text);
    116             mLastText = text;
    117         }
    118     }
    119 
    120     public void setDatePattern(String pattern) {
    121         if (TextUtils.equals(pattern, mDatePattern)) {
    122             return;
    123         }
    124         mDatePattern = pattern;
    125         mDateFormat = null;
    126         if (isAttachedToWindow()) {
    127             updateClock();
    128         }
    129     }
    130 }
    131