Question

过去一个月我一直在尝试慢慢学习Android API。我已阅读文档，查看过的示例，似乎无法弄清楚我做错了什么。基本上，应用程序在应用程序启动后准确地设置了1分钟的警报。

我目前遇到的问题是在设置闹钟后，它没有收到。这就是我所拥有的：

SetAlarmActivity.java

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<span class="switchery switchery-small" style="box-shadow: rgb(223, 223, 223) 0px 0px 0px 0px inset; border-color: rgb(223, 223, 223); transition: border 0.4s, box-shadow 0.4s; background-color: rgb(255, 255, 255);">
    <small style="left: 0px; transition: background-color 0.4s, left 0.2s;">0px</small>
</span>
<span class="switchery switchery-small" style="box-shadow: rgb(223, 223, 223) 0px 0px 0px 0px inset; border-color: rgb(223, 223, 223); transition: border 0.4s, box-shadow 0.4s; background-color: rgb(255, 255, 255);">
    <small style="left: 1px; transition: background-color 0.4s, left 0.2s;">1px</small>
</span>

AlarmReceiver.java

public class SetAlarmActivity extends AppCompatActivity {

    private final String TAG = "AlarmTest";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_set_alarm);
        Calendar c = Calendar.getInstance();
        c.add(Calendar.MINUTE, 1);
        Log.d(TAG, "Alarm time is " + c.getTime());

        // set the intent to launch our SetAlarmActivity
        Intent alarmIntent = new Intent(SetAlarmActivity.this, SetAlarmActivity.class);

        // retrieve a PendingIntent to perform a Broadcast
        PendingIntent pendingAlarmIntent = PendingIntent.getBroadcast(SetAlarmActivity.this, 0, alarmIntent, 0);

        // grab the Alarm Service and tell it to call our Intent at the set time
        AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            alarmManager.setExact(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pendingAlarmIntent);
        }else{
            alarmManager.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pendingAlarmIntent);
        }
    }
}

的AndroidManifest.xml

public class AlarmReceiver extends WakefulBroadcastReceiver {
    private final String TAG = "AlarmTest";

    @Override
    public void onReceive(Context context, Intent intent){
        Log.d(TAG, "Received broadcast!");
    }
}

Answer 1

您必须在当前activity和receiver类之间创建意图。像这样改变你的代码。

Intent intent = new Intent(SetAlarmActivity.this, AlarmReceiver.class);

Answer 2

更改

Intent alarmIntent = new Intent（SetAlarmActivity.this， SetAlarmActivity.class）;

到

Intent alarmIntent = new Intent（SetAlarmActivity.this， AlarmReceiver.class）;

然后它的工作正常

未收到AlarmManager广播

2 个答案: