java - 计时器小部件卡住

Question

我有一个学校计时器应用程序，我尝试制作小部件计时器并且我做到了。但是两天前我注意到一个问题:有时小部件停止工作并且不继续。当我删除并创建另一个小部件时，它会继续工作。但是，这对我来说是个大问题，所以我正在努力解决它。我到处搜索，但找不到任何相关信息。

我该如何解决这个问题？

package com.candydevelopment.okulsayac;

import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ActivityNotFoundException;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.os.StrictMode;
import android.util.TypedValue;
import android.widget.ArrayAdapter;
import android.widget.RemoteViews;
import android.widget.TextView;
import android.widget.Toast;

import org.json.JSONArray;
import org.json.JSONObject;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;


public class sayacWidget extends AppWidgetProvider {

private static final String TAG = MainActivity.class.getName();
private static final String FILENAME = "";
TextView txtStartLeftDate, txtOkulText,txttatil15leftdate,txttatil15yazi;
private long startTime,starttime15;
private long diff;
private CountDownTimer mCountDownTimer,mCountDownTimer15;
String acilmaZaman, kapanmaZaman,tatil15;
Context con;
String address = "https://www.candygaminggames.com/okulsayac.php";
InputStream is = null;
String line = null;
String result = null;
String[] data;
ArrayAdapter<String> adapter;
SharedPreferences myPreferences;
SharedPreferences.Editor myEditor;
static final int READ_BLOCK_SIZE = 100;

public void CalculateTime(final Context context, final AppWidgetManager appWidgetManager,
                   final int appWidgetId) {
    views = new RemoteViews(con.getPackageName(), R.layout.sayac_widget);
    try{
        acilmaZaman=SaveGet.getValue(con,"Acilma");
        kapanmaZaman=SaveGet.getValue(con,"Kapanma");
        tatil15=SaveGet.getValue(con,"tatil15");
    } catch (Exception ed) {
        ed.printStackTrace();
    }

    SimpleDateFormat formatter = new SimpleDateFormat("dd.MM.yyyy, HH:mm:ss");
    formatter.setLenient(false);


    Date acilmaTarih;
    Date kapanmaTarih;
    Date tatil15date;


    long milliseconds = 0;
    long milliseconds15 = 0;
    try {
        acilmaTarih = formatter.parse(acilmaZaman);
        kapanmaTarih = formatter.parse(kapanmaZaman);
        tatil15date = formatter.parse(tatil15);
        milliseconds15 = tatil15date.getTime();
        milliseconds = acilmaTarih.getTime();

    } catch (ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }



    diff = milliseconds - startTime;
    if (diff < 0) {
        try {
            kapanmaTarih = formatter.parse(kapanmaZaman);
            milliseconds = kapanmaTarih.getTime();
            diff = milliseconds - startTime;

        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        diff = milliseconds - startTime;

        views.setTextViewText(R.id.txtOkulBilgi, "Okulun Kapanmasına Kalan");

        apm.updateAppWidget(appWidgetId, views);
    }
    startTime = System.currentTimeMillis();
    mCountDownTimer = new CountDownTimer(milliseconds, 1000 ) {

        public void onTick(long millisUntilFinished) {

            startTime = startTime - 1;
            Long serverUptimeSeconds =
                    (millisUntilFinished - startTime) / 1000;

            String daysLeft = String.valueOf(serverUptimeSeconds / 86400);
            String hoursLeft = String.valueOf((serverUptimeSeconds % 86400) / 3600);
            String minutesLeft = String.valueOf(((serverUptimeSeconds % 86400) % 3600) / 60);
            String secondsLeft = String.valueOf(((serverUptimeSeconds % 86400) % 3600) % 60);
            views.setTextViewText(R.id.txtAcilma,daysLeft + "   :   " + hoursLeft + "    :    " + minutesLeft + "    :    " + secondsLeft);
            apm.updateAppWidget(WidgetID, views);

        }


        public void onFinish() {

        }
    }.start();
    starttime15 = System.currentTimeMillis();
    mCountDownTimer15 = new CountDownTimer(milliseconds15, 1000) {

        public void onTick(long millisUntilFinishedd) {

            starttime15 = starttime15 - 1;
            Long serverUptimeSeconds15 =
                    (millisUntilFinishedd - starttime15) / 1000;

            String daysLeft = String.valueOf(serverUptimeSeconds15 / 86400);
            String hoursLeft = String.valueOf((serverUptimeSeconds15 % 86400) / 3600);
            String minutesLeft = String.valueOf(((serverUptimeSeconds15 % 86400) % 3600) / 60);
            String secondsLeft = String.valueOf(((serverUptimeSeconds15 % 86400) % 3600) % 60);
            views.setTextViewText(R.id.txtAcilma2,daysLeft + "   :   " + hoursLeft + "    :    " + minutesLeft + "    :    " + secondsLeft);
            apm.updateAppWidget(appWidgetId, views);

        }


        public void onFinish() {

        }
    }.start();
}
int WidgetID;
AppWidgetManager apm;
public void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
                            int appWidgetId) {
    con = context;
    apm = appWidgetManager;
    WidgetID = appWidgetId;
        try{
            acilmaZaman=SaveGet.getValue(con,"Acilma");
            kapanmaZaman=SaveGet.getValue(con,"Kapanma");
            tatil15=SaveGet.getValue(con,"tatil15");
            CalculateTime(context,appWidgetManager,appWidgetId);

        } catch (Exception e) {
            e.printStackTrace();
            Toast.makeText(con,
                    "Lütfen ilk açılışta internete bağlanın.",
                    Toast.LENGTH_LONG).show();
        }
}

RemoteViews views;

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
    // There may be multiple widgets active, so update all of them
    for (int appWidgetId : appWidgetIds) {
        updateAppWidget(context, appWidgetManager, appWidgetId);
    }
}

@Override
public void onEnabled(Context context) {
    // Enter relevant functionality for when the first widget is created


}

@Override
public void onDisabled(Context context) {
    // Enter relevant functionality for when the last widget is disabled
}



}`

Answer 1

问题是小部件 View 的更新使 AppWidgetProvider. AppWidgetProvider 是一个 BroadcastReceiver，因此它的生命周期非常短(没有 goAsync() 时为 10 秒)。所以在AppWidgetProvider死掉之后，你的views不会被更新。为避免这种行为，请计算日期并从服务更新小部件的 View ，这将解决您的问题。