Android 下载完成时下载管理器崩溃

这是我的广播接收器：

 BroadcastReceiver broadcast = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
            dwnId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0);
            Cursor c = DownloadManagerWrapper.getInstance(getActivity()).getDownloadManager().query(new DownloadManager.Query().setFilterById(dwnId));
            c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));
        } else {
            Toast.makeText(getActivity(), "ERROR!", Toast.LENGTH_SHORT).show();
        }

    }
};

我在onCreateView上注册它：

(getActivity()).registerReceiver(broadcast, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));

这是我的DownloadManagerRapper的样子：

public class DownloadManagerWrapper {
private static final String DOWNLOAD_SERVICE = "download";

private DownloadManager mgr;

private static DownloadManagerWrapper i;

private DownloadManagerWrapper(Context c) {
    mgr = (DownloadManager) c.getSystemService(DOWNLOAD_SERVICE);
}

public static DownloadManagerWrapper getInstance(Context c) {
    if (i == null) {
        i = new DownloadManagerWrapper(c);
    }
    return i;
}

public DownloadManager getDownloadManager() {
    return mgr;
}

}

这就是我所做的，使其成为FC：

 if(Util.hasNetworkConnection(ctx)){
        Uri destination = Uri.parse("file://" + Environment.getExternalStorageDirectory().getAbsolutePath() + "/media/video.mp4");
        DownloadManagerWrapper.getInstance(ctx).getDownloadManager().enqueue(new DownloadManager.Request(uri).setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE).setAllowedOverRoaming(false).setDestinationUri(destination));
    }else{
        Toast.makeText(ctx, "No Internet Available!!", Toast.LENGTH_SHORT).show();
    }

我得到这个错误：

02-14 15:57:03.488: E/AndroidRuntime(4987): FATAL EXCEPTION: main
02-14 15:57:03.488: E/AndroidRuntime(4987): java.lang.RuntimeException: Error receiving broadcast Intent { act=android.intent.action.DOWNLOAD_COMPLETE flg=0x10 pkg=com.Red.medicalpaint (has extras) } in com.Red.Fragments.AppLibraryFragment$1@41a1f998
02-14 15:57:03.488: E/AndroidRuntime(4987):     at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:765)
02-14 15:57:03.488: E/AndroidRuntime(4987):     at android.os.Handler.handleCallback(Handler.java:615)
02-14 15:57:03.488: E/AndroidRuntime(4987):     at android.os.Handler.dispatchMessage(Handler.java:92)
02-14 15:57:03.488: E/AndroidRuntime(4987):     at android.os.Looper.loop(Looper.java:137)
02-14 15:57:03.488: E/AndroidRuntime(4987):     at android.app.ActivityThread.main(ActivityThread.java:4978)
02-14 15:57:03.488: E/AndroidRuntime(4987):     at java.lang.reflect.Method.invokeNative(Native Method)

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评论这句话，让它发挥作用：

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c、 getInt（c.getColumnIndex（DownloadManager.COLUMN_STATUS））

您是否尝试调试Environment.getExternalStorageDirectory（）.getAbsolutePath（）+“/media/video.mp4”以查看它是否返回正确的路由？是的，我必须添加一个“file://”。现在它是正确的。但我还有一个问题。我现在编辑我的问题