Java BroadcastReceiver 未收到下载完成操作

BroadcastReceiver not receiving download complete action

提问by John Roberts

I am trying to capture download complete events, but my BroadcastReceiver is not receiving them. Here is the receiver:

我正在尝试捕获下载完成事件，但我的 BroadcastReceiver 没有收到它们。这是接收器：

public class DownloadListenerService extends BroadcastReceiver {        
    @Override
    public void onReceive(final Context context, Intent intent) {
        System.out.println("got here");
        SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(context);
        SharedPreferences.Editor editor = settings.edit();

        String action = intent.getAction();
        if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
            String downloadPath = intent.getStringExtra(DownloadManager.COLUMN_URI);
            editor.putString("downloadPath", downloadPath);
            editor.commit();
        }
    }
}

Here is the manifest:

这是清单：

<application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

    <receiver 
        android:name="com.example.alreadydownloaded.DownloadListenerService" 
        android:exported="true">
        <intent-filter>
            <action android:enabled="true" android:name="android.intent.action.DOWNLOAD_COMPLETE" />
        </intent-filter>
    </receiver>
 </application>

Anyone see what's wrong?

有谁看到有什么问题吗？

采纳答案by Simon

• Use full package name for you receiver like com.example.DownloadListenerService
• Add android:exported="true"BroadcastReceivercan receive messages from sources outsideits application.

• Change the name of the Actionin the intent-filterto android.intent.action.DOWNLOAD_COMPLETE

      <receiver 
          android:name="com.example.DownloadListenerService"
          android:exported="true" >
          <intent-filter>
              <action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
          </intent-filter>
      </receiver>
      <uses-permission android:name="android.permission.INTERNET" />
  

• 为您的接收器使用完整的包名称，例如 com.example.DownloadListenerService
• 添加android:exported="true"BroadcastReceiver可以outside从其应用程序的来源接收消息。

• 更改的名称Action在intent-filter以android.intent.action.DOWNLOAD_COMPLETE

      <receiver 
          android:name="com.example.DownloadListenerService"
          android:exported="true" >
          <intent-filter>
              <action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
          </intent-filter>
      </receiver>
      <uses-permission android:name="android.permission.INTERNET" />
  

The receiver only will be triggered if was registered from your application usingregisterReceiver(@Nullable BroadcastReceiver receiver,IntentFilter filter);

仅当使用从您的应用程序注册时才会触发接收器registerReceiver(@Nullable BroadcastReceiver receiver,IntentFilter filter);

Code to enqueue Download :

排队下载的代码：

DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
DownloadManager.Request request = new DownloadManager.Request(Uri.parse("https://www.google.com/images/srpr/logo4w.png"));
dm.enqueue(request);

回答by Kylar

I think the action name in your XML is wrong. The docs state that the correct one is: android.intent.action.DOWNLOAD_COMPLETEnot DownloadManager.ACTION_DOWNLOAD_COMPLETE- you need to use the constant, not the Java form.

我认为您的 XML 中的操作名称是错误的。文档指出正确的是：android.intent.action.DOWNLOAD_COMPLETE而不是DownloadManager.ACTION_DOWNLOAD_COMPLETE- 您需要使用常量，而不是 Java 形式。

<receiver android:name=".DownloadListenerService" >
    <intent-filter>
        <action android:enabled="true" android:name="android.intent.action.DOWNLOAD_COMPLETE" />
    </intent-filter>
</receiver>

回答by user755

If the download is based on your app then you need to send a broadcast?

如果下载是基于您的应用程序，那么您需要发送广播吗？

Intent i = new Intent();
i.setAction(DownloadManager.ACTION_DOWNLOAD_COMPLETE);
sendBroadcast(i);

回答by AndroidLad

I think you are calling DownloadManger service from the IntentService/Service. If so remove it from there and put it into activity.

我认为您正在从 IntentService/Service 调用 DownloadManger 服务。如果是这样，请将其从那里移除并投入使用。

add permission in android manifest

在android清单中添加权限

 <uses-permission android:name="android.permission.SEND_DOWNLOAD_COMPLETED_INTENTS" />

回答by PKSNAP

  <receiver
        android:name=".BroadCast_Service.Download_BroadCast"
        android:exported="true">
        <intent-filter android:priority="1099">
            <action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
        </intent-filter>
    </receiver>