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/