方法中启动的Activity动态注册广播，此新启动的Activity接收不到此方法后续发出的广播

今天写音乐播放器歌词展示界面(这个播放器的代码可能周末再释放出来吧，有点乱，需要整理)，本来想点击列表框后弹出展示歌词Activity，同时接收方法后续代码中发出的广播，但却一直接收不到，调整几次后，觉得可能方法X中新启动Activity，在其这个新的Activity中的onCreate方法动态注册广播，此时这个新启动的Activity接收不到此方法X后续发出的广播。
最终测试发现果真如此
测试代码如下：

    package com.example.myfirstapp;

    import android.app.Activity;
    import android.content.Intent;
    import android.os.Bundle;
    import android.view.View;

    public class FirstActivity extends Activity {
        
        /* (非 Javadoc)
         * Title: onCreate
         * Description:
         * @param savedInstanceState
         * @see android.app.Activity#onCreate(android.os.Bundle)
         */
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.firstactivity);
            System.out.println("SecondActivity");
        }
        
        public void openActivity2( View view ) {
            Intent mIntent = new Intent(this, SecondActivity.class);
            startActivity(mIntent);
            Intent broadcastIntent = new Intent("com.example.firstactivity");
            sendBroadcast(broadcastIntent);
        }
        
    }

布局：

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >

        <Button
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:onClick="openActivity2"
            android:text="Open" />

    </LinearLayout>

SecondActivity中的代码：

    package com.example.myfirstapp;

    import java.util.Date;

    import android.app.Activity;
    import android.content.BroadcastReceiver;
    import android.content.Context;
    import android.content.Intent;
    import android.content.IntentFilter;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.TextView;

    public class SecondActivity extends Activity {
        
        private TextView second_tv1 = null;
        private SecondBoradCast mSecondBoradCast = new SecondBoradCast();
        
        /* (非 Javadoc)
         * Title: onCreate
         * Description:
         * @param savedInstanceState
         * @see android.app.Activity#onCreate(android.os.Bundle)
         */
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.secondactivity);
            second_tv1 = (TextView)findViewById(R.id.second_tv1);
            registerReceiver(mSecondBoradCast, new IntentFilter("com.example.firstactivity"));
            System.out.println("SecondActivity");
        }
        
        public void sendBroadCast( View view ) {
            Intent broadcastIntent = new Intent("com.example.firstactivity");
            sendBroadcast(broadcastIntent);
        }
        
        /* (非 Javadoc)
         * Title: onDestroy
         * Description:
         * @see android.app.Activity#onDestroy()
         */
        @Override
        protected void onDestroy() {
            super.onDestroy();
            if( mSecondBoradCast != null ) {
                unregisterReceiver(mSecondBoradCast);
                mSecondBoradCast = null;
            }
        }
        
        public class SecondBoradCast extends BroadcastReceiver {

            /* (非 Javadoc)
             * Title: onReceive
             * Description:
             * @param context
             * @param intent
             * @see android.content.BroadcastReceiver#onReceive(android.content.Context, android.content.Intent)
             */
            @Override
            public void onReceive(Context context, Intent intent) {
                System.out.println(new Date());
                second_tv1.setText("接收成功");
            }
            
        }
        
    }

布局：

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >

        <Button
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:onClick="sendBroadCast"
            android:text="Send" />

        <TextView
            android:id="@+id/second_tv1"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:text="Just Test"
            android:textColor="#f000" />

    </LinearLayout>

运行此项目，点击第一个Activity中的Open按钮后，出现界面

点击Send按钮，发送广播，界面中的TextView改变文字

在点击了Send按钮之后，才接收到广播