我怎样才能等到 DownloadManager 完成？

Question

这是我目前使用的代码

                String iosjiUrl = "http://modapps.com/NotoCoji.ttf";
                DownloadManager.Request request = new DownloadManager.Request(Uri.parse(iosjiUrl));
                request.setDescription("Sscrition");
                request.setTitle("Somle");
// in order for this if to run, you must use the android 3.2 to compile your app
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
                    request.allowScanningByMediaScanner();
                    request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                }
                request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "NotoColorji.ttf");

// get download service and enqueue file
                DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);

                manager.enqueue(request);

我找不到等待文件下载的方法。

我也试过弄清楚如何进行 ASync，但也没弄清楚 =/

再次感谢！

Answer 1

使用 BroadcastReceiver 检测下载何时完成：

public class DownloadBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();

        if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
            //Show a notification
        }
    }
}

并在您的清单中注册它：

<receiver android:name=".DownloadBroadcastReceiver">
    <intent-filter>
        <action android:name="android.intent.action.DOWNLOAD_COMPLETE"/>
    </intent-filter>
</receiver>

Answer 2

A Broadcast intent action sent by the download manager when a download completes so you need to register a receiver for when the download is complete:

To register receiver

registerReceiver(onComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));

and a BroadcastReciever handler

BroadcastReceiver onComplete=new BroadcastReceiver() {
    public void onReceive(Context ctxt, Intent intent) {
        // your code
    }
};

You can also create AsyncTask to handle the downloading of big files

Create a download dialog of some sort to display downloading in notification area and than handle the opening of the file:

protected void openFile(String fileName) {
    Intent install = new Intent(Intent.ACTION_VIEW);
    install.setDataAndType(Uri.fromFile(new File(fileName)),"MIME-TYPE");
    startActivity(install);
}

you can also check the sample link

sample

我怎样才能等到 DownloadManager 完成？

How can I wait until DownloadManager is complete?

android

android-download-manager