FLAG_MUTABLE 和 FLAG_IMMUTABLE 中的 PendingIntent 错误

Question

我正在创建一个 java android 应用程序，我的应用程序每天在午夜运行一系列代码。

这实际上是我的问题的延续：前台服务是运行单个方法的唯一选择吗？（在@Muzammal_Ghafoor的回答下）

我重新创建了他给我的代码，但现在我遇到了一个问题。

从上图中可以看出，创建PendingIntent时必须指定FLAG_MUTABLE或FLAG_IMMUTABLE。我很难理解 PendingIntent 的文档，所以我不知道如何解决这个问题。

这是我从给我的答案中添加的代码。对于上下文，PendingIntent 位于 ScheduleDailyTask() 函数上。

MainActivity.java // onCreate()

public class MainActivity extends AppCompatActivity {
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_main);
        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
            Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
            return insets;
        });
        scheduleDailyTask(this);
}

MainActivity.java // ScheduleDailyTask()

    public void scheduleDailyTask(Context context){
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(context, DailyTaskBroadcastReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent,
                PendingIntent.FLAG_NO_CREATE | PendingIntent.FLAG_IMMUTABLE);

        // Alarm Schedule
        if (pendingIntent == null) {
            Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(System.currentTimeMillis());
            calendar.set(Calendar.HOUR_OF_DAY, 0);
            calendar.set(Calendar.MINUTE, 0);
            calendar.set(Calendar.SECOND, 0);
            calendar.add(Calendar.DAY_OF_YEAR, 1); // 1 = next day

            // Set the alarm to trigger at midnight every day
            alarmManager.setRepeating(
                    AlarmManager.RTC_WAKEUP,
                    calendar.getTimeInMillis(),
                    AlarmManager.INTERVAL_DAY,
                    PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
            );
        }
    }

DailyTaskBroadcastReceiver.java

public class DailyTaskBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        storage.createNewDailyCSV(context);
    }
}

storage.java // createNewDailyCSV()

    public static void createNewDailyCSV(Context context){
        try {
            // This creates the directories needed for the file
            ContextWrapper contextWrapper = new ContextWrapper(context);
            Date dayToday = Calendar.getInstance().getTime();
            String year = DayData.formatYEAR(dayToday);
            String month = DayData.formatMONTH(dayToday);
            dailyFileName = DayData.formatDAY(dayToday);
            dailyFilePath = new File(contextWrapper.getExternalFilesDir(year + "/" + month), dailyFileName);

            // This creates the CSV and adds all the needed information inside it
            loadConstCSV();
            PrintWriter outputFile = new PrintWriter(dailyFilePath);
            StringBuilder sb = new StringBuilder();
            String name;
            String price;
            String weekday = DayData.formatWEEKDAY(dayToday);
            boolean[] weekdayBOOL;
            for (int i=0; i<Data.constantList.size();i++){
                name = Data.constantList.get(i).getName();
                price = String.valueOf(Data.constantList.get(i).getPrice());
                weekdayBOOL = Data.constantList.get(i).getWd_Bool();
                switch (weekday){
                    case "Sun":
                        if (weekdayBOOL[0]){
                            sb.append(name).append(",").append(price).append("\n");
                        }
                        break;
                    case "Mon":
                        if (weekdayBOOL[1]){
                            sb.append(name).append(",").append(price).append("\n");
                        }
                        break;
                    case "Tue":
                        if (weekdayBOOL[2]){
                            sb.append(name).append(",").append(price).append("\n");
                        }
                        break;
                    case "Wed":
                        if (weekdayBOOL[3]){
                            sb.append(name).append(",").append(price).append("\n");
                        }
                        break;
                    case "Thu":
                        if (weekdayBOOL[4]){
                            sb.append(name).append(",").append(price).append("\n");
                        }
                        break;
                    case "Fri":
                        if (weekdayBOOL[5]){
                            sb.append(name).append(",").append(price).append("\n");
                        }
                        break;
                    case "Sat":
                        if (weekdayBOOL[6]){
                            sb.append(name).append(",").append(price).append("\n");
                        }
                        break;
                }
                outputFile.write(sb.toString());
                outputFile.close();
            }


        }catch (Exception e){
            e.printStackTrace();
        }finally {
            Data.constantList.clear();
        }
    }
}

Answer 1

您只需将

FLAG_MUTABLE

或

FLAG_IMMUTABLE

添加到您的 PendingIntent Flags 中，如下所示

PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE)

强烈建议您使用

FLAG_IMMUTABLE