Question

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

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>

有人看到了什么问题吗？

Answer 1

为您的收件人使用完整的套餐名称，例如com.example.DownloadListenerService
添加android:exported="true" BroadcastReceiver可以从其应用来源outside接收消息。

将Action中intent-filter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" />

只有在您的应用程序使用 registerReceiver(@Nullable BroadcastReceiver receiver,IntentFilter filter);

注册时才会触发接收方

要排队的代码下载：

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);

Answer 2

我认为XML中的操作名称是错误的。文档说明正确的是： android.intent.action.DOWNLOAD_COMPLETE 而非 DownloadManager.ACTION_DOWNLOAD_COMPLETE - 您需要使用常量，而不是Java表单。

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

Answer 3

  <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>

Answer 4

我认为您是从IntentService / Service调用DownloadManger服务。如果是这样，将其从那里移除并将其投入活动。

在android清单中添加权限

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

Answer 5

如果下载基于您的应用，那么您需要发送广播吗？

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

BroadcastReceiver没有收到下载完成动作

5 个答案: