java - 如何通过广播接收器启动 Activity

Question

我正在尝试为我的大学做一个 Android 练习，但我被困在闹钟部分。当您得到闹钟确定的时间时，我需要发送警报并可以打开另一个 Activity 来接收通知。

但是由于该类已经扩展了 BroadcastReceiver，我如何才能启动另一个 Activity ？

我的类(class)是这样的:

public class ReceiverAlarme extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    //inicia a Activity do Treino
    Intent itTreino = new Intent(this, telaTreino.class);

    //Does not work
    //startActivity(itTreino);

    //tentei fazer uma notificação que abrisse o programa, mas não rolou
    Notification.Builder notificacao = new Notification.Builder(this);
    notificacao.setDefaults(Notification.DEFAULT_ALL)
            .setSmallIcon(android.R.drawable.ic_dialog_email)
            .setContentTitle("Agendamento do teste")
            .setContentText("Você tem um teste agendado!")
         .setContentIntent(PendingIntent.getActivities(getApplicationContext(), 1, itTreino, PendingIntent.FLAG_CANCEL_CURRENT));

    NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    nm.notify(1, notificacao.build());
}
}

Answer 1

您需要从 Context 运行 startActivity，因此请尝试以下操作:

context.startActivity(itTreino);