适配Android S+（API 31+）时PendingIntent未指定FLAG问题求助

开发通知应用时遇到如下错误：

java.lang.IllegalArgumentException: com.tonyapp.rabbitfarm: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.
    Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.
        at android.app.PendingIntent.checkFlags(PendingIntent.java:375)
        at android.app.PendingIntent.getBroadcastAsUser(PendingIntent.java:645)
        at android.app.PendingIntent.getBroadcast(PendingIntent.java:632)
        at com.allyants.notifyme.NotifyMe.scheduleNotification(NotifyMe.java:159)
        at com.allyants.notifyme.NotifyMe.<init>(NotifyMe.java:89)
        at com.allyants.notifyme.NotifyMe$Builder.build(NotifyMe.java:327)
        at com.tonyapp.rabbitfarm.NotesTakerActivity.onTimeSet(NotesTakerActivity.java:291)
        at com.wdullaer.materialdatetimepicker.time.TimePickerDialog.notifyOnDateListener(TimePickerDialog.java:1893)
        at com.wdullaer.materialdatetimepicker.time.TimePickerDialog.lambda$onCreateView$3$com-wdullaer-materialdatetimepicker-time-TimePickerDialog(TimePickerDialog.java:761)
        at com.wdullaer.materialdatetimepicker.time.TimePickerDialog$$ExternalSyntheticLambda3.onClick(Unknown Source:2)
        at android.view.View.performClick(View.java:7441)
        at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1202)
        at android.view.View.performClickInternal(View.java:7418)
        at android.view.View.access$3700(View.java:835)
        at android.view.View$PerformClick.run(View.java:28676)
        at android.os.Handler.handleCallback(Handler.java:938)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loopOnce(Looper.java:201)
        at android.os.Looper.loop(Looper.java:288)
        at android.app.ActivityThread.main(ActivityThread.java:7839)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)

我的MainActivity.java相关代码： #

btnCancel.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            NotifyMe.cancel(getApplicationContext(),"test");
        }
    });


    btnNotify.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            dpd.show(getSupportFragmentManager(),"DatePickerDialog");
        }
    });
}

@Override
public void onDateSet(DatePickerDialog view, int year, int monthOfYear, int dayOfMonth) {

    now.set(Calendar.YEAR,year);
    now.set(Calendar.MONTH,monthOfYear);
    now.set(Calendar.DAY_OF_MONTH,dayOfMonth);

    tpd.show(getSupportFragmentManager(),"timepicker");



}

@Override
public void onTimeSet(TimePickerDialog view, int hourOfDay, int minute, int second) {


    now.set(Calendar.HOUR_OF_DAY,hourOfDay);
    now.set(Calendar.MINUTE,minute);
    now.set(Calendar.SECOND,second);



    NotifyMe notifyMe = new NotifyMe.Builder(getApplicationContext())
            .title(edt1.getText().toString())
            .content(edt2.getText().toString())
            .color(255,0,0,255)
            .led_color(255,255,255,255)
            .time(now)
            .addAction(new Intent(),"Snooze",false)
            .addAction(new Intent(),"Dismiss",true)
            .addAction(new Intent(),"Done")
            .large_icon(R.mipmap.ic_launcher_round)
            .build();

}

解决方案 #

错误根源是Target SDK >=31（Android 12+）要求创建PendingIntent时必须指定FLAG_IMMUTABLE或FLAG_MUTABLE，而你使用的NotifyMe库内部创建PendingIntent时没有添加这些flag。

• 方案1：升级NotifyMe库到兼容Android 12+的版本
  检查该库的最新版本，确认是否已修复此问题。若有更新，直接在build.gradle中升级依赖版本即可。

• 方案2：修改NotifyMe库源码（无法升级时）
  找到库中scheduleNotification方法（对应错误栈的com.allyants.notifyme.NotifyMe.scheduleNotification(NotifyMe.java:159)），修改PendingIntent创建代码：

  int flags;
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
      // 除非需要可变PendingIntent（如内回复、气泡功能），否则优先用FLAG_IMMUTABLE
      flags = PendingIntent.FLAG_IMMUTABLE;
      // 需可变时用：flags = PendingIntent.FLAG_MUTABLE;
  } else {
      flags = 0;
  }
  PendingIntent.getBroadcast(context, 0, intent, flags);
  

• 方案3：替换为系统原生通知API（最可靠）
  若NotifyMe库长期未维护，建议直接用Android原生NotificationManager和PendingIntentAPI创建通知，完全控制flag设置：

  // 创建通知广播意图
  Intent notifyIntent = new Intent(this, YourNotificationReceiver.class);
  PendingIntent pendingIntent = PendingIntent.getBroadcast(
          this,
          0,
          notifyIntent,
          Build.VERSION.SDK_INT >= Build.VERSION_CODES.S ? PendingIntent.FLAG_IMMUTABLE : 0
  );
  
  // 构建通知
  NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "YOUR_CHANNEL_ID")
          .setSmallIcon(R.drawable.ic_notification)
          .setContentTitle(edt1.getText().toString())
          .setContentText(edt2.getText().toString())
          .setPriority(NotificationCompat.PRIORITY_DEFAULT)
          .setContentIntent(pendingIntent);
  
  // 调度通知
  AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
  alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, now.getTimeInMillis(), pendingIntent);
  

内容的提问来源于stack exchange，提问作者jackie Maik