java - BroadcastReceiver 未收到下载完成操作

Question

我正在 try catch 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();
        }
    }
}

这是 list :

<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>

有人看到哪里出了问题吗？

Answer 1

• 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 可以从其应用程序外部的来源接收消息。

• 将 intent-filter 中的 Action 的名称更改为 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" />
  

仅当使用 registerReceiver(@Nullable BroadcastReceiver receiver,IntentFilter filter);

从您的应用程序注册时才会触发接收器

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);