我有一个应用程序，您可以在其中创建 5 个警报，其中要创建的警报显示在 ListView 中，并假设当 listView 的元素播放警报但应该从 ListView 中删除该项目但警报被删除以达到预定的时间总是响起。 我已经查看了很多关于如何删除警报的教程和指南，但没有一个对我有帮助。 要删除我所做的是将每个警报的 ID 保存在 sqlite 数据库中，当我给警报 eliminiar 时，我做的是我带上想要消除的警报的 id 并将其提供给 PendingIntent.getBroadcast 以删除警报你想要但它不会发生。 有人可以检查我的代码并告诉我是否有任何错误导致警报无法消除。 谢谢你

我用来创建闹钟的方法

public void agregarAlarma(Calendar targetCal){
    final int _id = ((int)System.currentTimeMillis()/1000);
    Random generator = new Random();
    DbHelper helper = new DbHelper(this);
    SQLiteDatabase bd = helper.getWritableDatabase();

    int id_nuevo = (_id + generator.nextInt());
    if(alarma.getSelectedItem().toString().equals("Desayuno")){
        comida = alarma.getSelectedItem().toString() + " " + targetCal.getTime().toString();
        descripcion = "del desayuno";
    }else if(alarma.getSelectedItem().toString().equals("Primera Merienda")){
        comida = alarma.getSelectedItem().toString() + " " + targetCal.getTime().toString();
        descripcion = "de la primera merienda";
    }else if(alarma.getSelectedItem().toString().equals("Almuerzo")){
        comida = alarma.getSelectedItem().toString() + " " + targetCal.getTime().toString();
        descripcion = "del almuerzo";
    }else if(alarma.getSelectedItem().toString().equals("Segunda Merienda")){
        comida = alarma.getSelectedItem().toString() + " " + targetCal.getTime().toString();
        descripcion = "de la segunda merienda";
    } else if(alarma.getSelectedItem().toString().equals("Cena")){
        comida = alarma.getSelectedItem().toString() + " " + targetCal.getTime().toString();
        descripcion = "de la cena";

    }

    Intent intent;
    PendingIntent pendingIntent;
    AlarmManager alarmManager;

    if(tablaVacia()>= 5){
         Toast.makeText(this,"Esta lista solo permite 5 alarmas, elimine alguna para crear otra nueva",Toast.LENGTH_SHORT).show();
    }else{
         intent  = new Intent(Recordatorios2.this, AlarmReceiver.class);
        intent.putExtra("Comida",comida);
         pendingIntent = PendingIntent.getBroadcast(Recordatorios2.this, id_nuevo ,intent, PendingIntent.FLAG_ONE_SHOT);
         alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
        alarmManager.set(AlarmManager.RTC_WAKEUP, targetCal.getTimeInMillis(), pendingIntent);
        descripcionTotal = "Alarma  " + descripcion  + " creada "+ targetCal.getTime().toString();
        Toast.makeText(this,descripcionTotal,Toast.LENGTH_SHORT).show();
        ContentValues valores = new ContentValues();
        valores.put("Descripcion",comida);
        valores.put("Identificador",id_nuevo);
        bd.insert("Alarmas",null,valores);
        llenarListaAlarmas1();
    }



}

这填充了 listView

    public void llenarListaAlarmas1(){
    listaAlarmas = (ListView)findViewById(R.id.listAlarma);
    lista.clear();
    DbHelper helper = new DbHelper(this);
    SQLiteDatabase bd = helper.getWritableDatabase();

    Cursor c = bd.rawQuery(CONSULTA_ALARMAS,null);

    if(c.moveToFirst()){
        do{
            alarmaDatos = new AlarmaDatos(c.getString(0),null);
            lista.add(alarmaDatos);
        }while (c.moveToNext());
    }
    final ArrayAdapter<AlarmaDatos> adapter1 = new ArrayAdapter<AlarmaDatos>(getApplicationContext(),android.R.layout.simple_list_item_1,lista);
    adapter1.notifyDataSetChanged();
    listaAlarmas.setAdapter(adapter1);
    adapter1.notifyDataSetChanged();

    listaAlarmas.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView adapterView, View view, int position, long id) {

            switch (position){


                case 0:
                    seleccion = adapter1.getItem(position).toString();
                    eliminarAlarma();
                    adapter1.notifyDataSetChanged();
                    lista.remove(position);

                    break;
                case 1:
                    seleccion = adapter1.getItem(position).toString();
                    eliminarAlarma();
                    adapter1.notifyDataSetChanged();
                    lista.remove(position);
                    break;

                case 2:
                    seleccion = adapter1.getItem(position).toString();
                    eliminarAlarma();
                    adapter1.notifyDataSetChanged();
                    lista.remove(position);
                    break;
                case 3:
                    seleccion = adapter1.getItem(position).toString();
                    eliminarAlarma();
                    adapter1.notifyDataSetChanged();
                    lista.remove(position);
                    break;
                case 4:
                    seleccion = adapter1.getItem(position).toString();
                    eliminarAlarma();
                    adapter1.notifyDataSetChanged();
                    lista.remove(position);
                    break;
            }


        }
    });

    }

这是用来消除警报的那个

                public void eliminarAlarma(){
                DbHelper helper = new DbHelper(getApplicationContext());
                SQLiteDatabase bd = helper.getWritableDatabase();
                int identificador =0;
                String CONSULTA_ID = "SELECT Identificador FROM Alarmas WHERE Alarmas.Descripcion = '" + seleccion + "';" ;
                Cursor cursor = bd.rawQuery(CONSULTA_ID,null);
                if(cursor.moveToFirst()){
                    do{
                        alarmaDatos = new AlarmaDatos(cursor.getString(0),null);
                        identificador = Integer.parseInt(alarmaDatos.toString());

                    }while (cursor.moveToNext());
                }
                Intent intent  = new Intent(getBaseContext(), AlarmReceiver.class);

                PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), identificador ,intent,0);
                AlarmManager alarmManager = (AlarmManager)getSystemService(getApplicationContext().ALARM_SERVICE);
                alarmManager.cancel(pendingIntent);
                pendingIntent.cancel();
                borrar(identificador);
                Toast.makeText(getApplicationContext(),"Alarma eliminada",Toast.LENGTH_SHORT).show();

            }

谁能帮我解决这个问题，因为事实并非如此，如果一切看起来不错，它就可以消除警报。

知识共享

最佳答案

不需要调用pendingIntent.cancel();，所以去掉那一行。

此外，PendingIntent 的构造应与您安排 AlarmManager 时的构造完全相同。

根据文档，如果满足以下条件，则两个 Intent 被视为相等:

their action, data, type, class, and categories are the same. This does not compare any extra data included in the intents.

所以它会是这样的:

 Intent intent  = new Intent(getBaseContext(), AlarmReceiver.class);
 PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), identificador , intent, PendingIntent.FLAG_NO_CREATE);
 AlarmManager alarmManager = (AlarmManager)getSystemService(getApplicationContext().ALARM_SERVICE);
 alarmManager.cancel(pendingIntent);

关于Android，如何取消闹钟？ alarmManager.cancel 不工作，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28756653/