如何在android中跟踪安装refferar

在我的应用程序中，我想从play store下载另一个应用程序，下载完成后，我想确认该应用程序的refferar

在清单中我的代码下面

<receiver
        android:name="com.example.demornd.Receiver"
        android:exported="true" >
        <intent-filter>
            <action android:name="android.intent.action.DOWNLOAD_COMPLETE"/>

             </intent-filter>
    </receiver>

还有我的听筒

public class Receiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent arg1) {
    Bundle extras = arg1.getExtras();
    String referrerString = extras.getString("url");
    Log.w("TEST", "Referrer is: " + referrerString);
    Toast.makeText(context, "Application Download Sucessfully", Toast.LENGTH_LONG).show();
}

}

但我的广播从未被呼叫过。 请帮忙！如何解决这个问题

提前谢谢

public class Receiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent arg1) {
    Bundle extras = arg1.getExtras();
    String referrerString = extras.getString("url");
    Log.w("TEST", "Referrer is: " + referrerString);
    Toast.makeText(context, "Application Download Sucessfully", Toast.LENGTH_LONG).show();
}