DownloadManager 没有收到下载完成的动作
DownloadManager doesn't receive download complete action
我有一个在后台下载文件的意图服务,注册了一个广播接收器来监听下载完成,但从未进入接收器的 onReceive()
函数。该文件似乎已完成下载,我可以在文件资源管理器中看到它,并从 DownloadManager 收到状态为 SUCCESS 的消息。就在下载成功消息之前,我收到了一个错误 Failed to chmod /mnt/internal_sd/../filedownloaded
Intent 从 main activity onCreate 开始:
Intent i = new Intent(context, MyIntentService.class);
startService(i);
意向服务:
public class MyIntentService extends IntentService {
DownloadManager downloadManager;
@Override
protected void onHandleIntent(Intent intent) {
IntentFilter filter = new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE);
registerReceiver(downloadReceiver, filter);
downloadFile();
}
void downloadFile(Uri downloadUri) {
downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
DownloadManager.Request request = new DownloadManager.Request(downloadUri);
request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI);
request.setAllowedOverRoaming(false);
request.setTitle("My Andorid App Download");
request.setDestinationInExternalFilesDir(getApplicationContext(), null, sku + ".apk");
long downloadNum = downloadManager.enqueue(request);
}
private BroadcastReceiver downloadReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
System.out.println("does not get in here.");
long id = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0);
Uri u = downloadManager.getUriForDownloadedFile(id);
}
};
}
清单:
<service
android:name="com.example.MyIntentService"
android:exported="false">
<intent-filter>
<action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
</intent-filter>
</service>
这听起来像是权限问题,chmod 失败错误,但我不太明白是什么。
我想通了我的问题。您不应该在意图服务中使用广播接收器,因为意图服务在单独的线程上运行,它将执行您 onHandleIntent()
中的所有内容,然后消失。在下载管理器可以广播下载完成之前,我的意图服务就消失了。
我有一个在后台下载文件的意图服务,注册了一个广播接收器来监听下载完成,但从未进入接收器的 onReceive()
函数。该文件似乎已完成下载,我可以在文件资源管理器中看到它,并从 DownloadManager 收到状态为 SUCCESS 的消息。就在下载成功消息之前,我收到了一个错误 Failed to chmod /mnt/internal_sd/../filedownloaded
Intent 从 main activity onCreate 开始:
Intent i = new Intent(context, MyIntentService.class);
startService(i);
意向服务:
public class MyIntentService extends IntentService {
DownloadManager downloadManager;
@Override
protected void onHandleIntent(Intent intent) {
IntentFilter filter = new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE);
registerReceiver(downloadReceiver, filter);
downloadFile();
}
void downloadFile(Uri downloadUri) {
downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
DownloadManager.Request request = new DownloadManager.Request(downloadUri);
request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI);
request.setAllowedOverRoaming(false);
request.setTitle("My Andorid App Download");
request.setDestinationInExternalFilesDir(getApplicationContext(), null, sku + ".apk");
long downloadNum = downloadManager.enqueue(request);
}
private BroadcastReceiver downloadReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
System.out.println("does not get in here.");
long id = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0);
Uri u = downloadManager.getUriForDownloadedFile(id);
}
};
}
清单:
<service
android:name="com.example.MyIntentService"
android:exported="false">
<intent-filter>
<action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
</intent-filter>
</service>
这听起来像是权限问题,chmod 失败错误,但我不太明白是什么。
我想通了我的问题。您不应该在意图服务中使用广播接收器,因为意图服务在单独的线程上运行,它将执行您 onHandleIntent()
中的所有内容,然后消失。在下载管理器可以广播下载完成之前,我的意图服务就消失了。