为什么onReceive在Android中不被称为扩展BroadcastReceiver

概述由于某种原因,不会调用onReceive方法我没有应用任何过滤器或任何东西,这是班级：importjava.util.ArrayList;importjava.util.Calendar;importandroid.content.BroadcastReceiver;importandroid.content.Intent;importandroid.content.Context;importandroid.util.Lo

由于某种原因,不会调用onReceive方法
我没有应用任何过滤器或任何东西,

这是班级：

import java.util.ArrayList;import java.util.Calendar;import androID.content.broadcastReceiver;import androID.content.Intent;import androID.content.Context;import androID.util.Log;public class RegisterListener extends broadcastReceiver {private final int DELAY_TIME = 5;private int m_seconds = 0;private int m_minutes = 0;private int m_hours   = 0;static ArrayList<broadcastReceiverListener> Listeners = new ArrayList<broadcastReceiverListener>();@OverrIDepublic voID onReceive(Context context, Intent intent) {    Log.d("ScreenReceiver Action:",intent.getAction());    Calendar c = Calendar.getInstance();     m_seconds = c.get(Calendar.SECOND);    m_minutes = c.get(Calendar.MINUTE);    m_hours = c.get(Calendar.HOUR);    for (broadcastReceiverListener Listener:Listeners){           Listener.onReceive(m_hours, m_minutes, m_seconds);        }}public static voID addbroadcastReceiveListener (broadcastReceiverListener Listener){    if(!Listeners.contains(Listener)){        Listeners.add(Listener);    }}public voID removebroadcastReceiveListener (broadcastReceiverListener Listener){    if(Listeners.contains(Listener)){        Listeners.remove(Listener);    }}

这是清单中的声明(应用程序的子代)

<receiver androID:name=".RegisterListener"></receiver>

编辑：
这是我试图添加的过滤器(在onReceive()内)

    IntentFilter filter = new IntentFilter(Intent.ACTION_USER_PRESENT);    broadcastReceiver mReceiver = new RegisterListener();    registerReceiver(mReceiver, filter);

我收到一个错误：

The method registerReceiver(broadcastReceiver, IntentFilter) is undefined for the type RegisterListener

解决方法:

如果您总是想听ACTION_USER_PRESENT,请尝试：

<receiver androID:name=".RegisterListener">    <intent-filter>        <action androID:name="androID.intent.action.USER_PRESENT" />    </intent-filter></receiver>

说明

The method registerReceiver(broadcastReceiver, IntentFilter) is undefined for the type RegisterListener

您必须将registerReceiver()与Context一起使用,例如context.registerReceiver(…).但：

This is the filter i trIEd to add (insIDe the onReceive() )

在onReceive()中注册接收器是没有意义的,因为onReceive()在注册接收器之前不会运行…所以它永远不会发生.您可以将此代码放在Activity中的onCreate()中,如下所示：

IntentFilter filter = new IntentFilter(Intent.ACTION_USER_PRESENT);broadcastReceiver mReceiver = new RegisterListener();registerReceiver(mReceiver, filter);

这只会在您的应用已经投放时监听ACTION_USER_PRESENT.

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