鍦ˋndroid涓疄鐜颁笅杞芥枃浠跺姛鑳介€氬父闇€瑕佷娇鐢―ownloadManager绫汇€備互涓嬫槸涓€涓畝鍗曠殑绀轰緥浠ｇ爜锛屾紨绀哄浣曚娇鐢―ownloadManager鏉ヤ笅杞芥枃浠讹細

public class MainActivity extends AppCompatActivity {

    private DownloadManager downloadManager;
    private long downloadID;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);

        Uri uri = Uri.parse("http://example.com/file.txt");

        DownloadManager.Request request = new DownloadManager.Request(uri);
        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
        request.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, "file.txt");

        downloadID = downloadManager.enqueue(request);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(onDownloadComplete);
    }

    private BroadcastReceiver onDownloadComplete = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            long id = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
            if (id == downloadID) {
                // 涓嬭浇瀹屾垚鍚庣殑澶勭悊閫昏緫
                Toast.makeText(MainActivity.this, "Download Completed", Toast.LENGTH_SHORT).show();
            }
        }
    };

    @Override
    protected void onResume() {
        super.onResume();
        registerReceiver(onDownloadComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
    }
}

鍦ㄤ笂闈㈢殑绀轰緥浠ｇ爜涓紝鎴戜滑棣栧厛閫氳繃DownloadManager绫诲垱寤轰竴涓敤浜庝笅杞芥枃浠剁殑Request瀵硅薄锛岀劧鍚庤皟鐢?code>enqueue鏂规硶寮€濮嬩笅杞姐€傚湪涓嬭浇瀹屾垚鍚庯紝鎴戜滑浣跨敤BroadcastReceiver鐩戝惉DownloadManager.ACTION_DOWNLOAD_COMPLETE骞挎挱锛屽苟鍦ㄦ帴鏀跺埌璇ュ箍鎾椂澶勭悊涓嬭浇瀹屾垚鍚庣殑閫昏緫銆?/p>

璇锋敞鎰忥紝涓轰簡浣夸笅杞藉姛鑳芥甯稿伐浣滐紝鎮ㄩ渶瑕佸湪AndroidManifest.xml鏂囦欢涓０鏄庢潈闄?code>android.permission.INTERNET鍜?code>android.permission.WRITE_EXTERNAL_STORAGE銆?/p>