Android DownloadManager 不知道文件下载到哪里

Question

经过两天的测试，我们能够部分工作。
我下载了文件，但不知道存放在哪里。
我尝试下载图片，图片出现在文件夹 /all_downloads

我不知道如何将它存储在 /sdcard/update 中。

import android.os.Environment;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.app.Activity;
import android.app.DownloadManager;
import android.app.DownloadManager.Query;
import android.app.DownloadManager.Request;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;

import java.io.File;

public class Upgrade extends ActionBarActivity {
    private long enqueue;
    private DownloadManager dm;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_upgrade);

        BroadcastReceiver receiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                String action = intent.getAction();
                if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
                    long downloadId = intent.getLongExtra(
                            DownloadManager.EXTRA_DOWNLOAD_ID, 0);
                    Query query = new Query();
                    query.setFilterById(enqueue);
                    Cursor c = dm.query(query);
                    if (c.moveToFirst()) {
                        int columnIndex = c
                                .getColumnIndex(DownloadManager.COLUMN_STATUS);
                        if (DownloadManager.STATUS_SUCCESSFUL == c
                                .getInt(columnIndex)) {


                        }
                    }
                }
            }
        };

        registerReceiver(receiver, new IntentFilter(
                DownloadManager.ACTION_DOWNLOAD_COMPLETE));
    }

    public void onClick(View view) {
        dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
        Request request = new Request(
                Uri.parse("http://android.vrt.ro/tv-update/v1.apk"));
        enqueue = dm.enqueue(request);


    }

    public void showDownload(View view) {

        Intent promptInstall = new Intent(Intent.ACTION_VIEW)
                .setDataAndType(Uri.parse("file:///sdcard/download/v1.apk"),
                        "application/vnd.android.package-archive");
        startActivity(promptInstall);

    }

}

Answer 1

使用这个

request.setDestinationInExternalPublicDir("/updates", "update.apk");

Added in API level 9

public DownloadManager.Request setDestinationInExternalPublicDir (String dirType, String subPath)

Set the local destination for the downloaded file to a path within the public external storage directory (as returned by getExternalStoragePublicDirectory(String)).

The downloaded file is not scanned by MediaScanner. But it can be made scannable by calling allowScanningByMediaScanner().

Parameters dirType the directory type to pass to getExternalStoragePublicDirectory(String)` subPath the path within the external directory, including the destination filename Returns this object Throws IllegalStateException If the external storage directory cannot be found or created.

你也可以用这个版本

String updatePath = Environment.getExternalStorageDirectory() + File.separator + "Updates" + File.separator + "update.apk";
request.setDestinationUri(Uri.fromFile(new File(updatePath)))

Android DownloadManager 不知道文件下载到哪里

Android DownloadManager not know where the file downloads

java

eclipse

import

android