DownloadManager를 사용하여 활동 내에서 다운로드 진행률 표시

DownloadManager를 사용하여 활동 내에서 다운로드 진행률 표시

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DownloadManager가 내 앱의 알림 표시 줄에 표시하는 것과 동일한 진행 상황을 재현하려고하는데 진행 상황이 게시되지 않습니다. runOnUiThread ()를 사용하여 업데이트하려고하는데 어떤 이유로 업데이트되지 않았습니다.

내 다운로드 :

String urlDownload = "https://dl.dropbox.com/s/ex4clsfmiu142dy/test.zip?token_hash=AAGD-XcBL8C3flflkmxjbzdr7_2W_i6CZ_3rM5zQpUCYaw&dl=1";
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(urlDownload));

request.setDescription("Testando");
request.setTitle("Download");
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "teste.zip");

final DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);

final long downloadId = manager.enqueue(request);

final ProgressBar mProgressBar = (ProgressBar) findViewById(R.id.progressBar1);

new Thread(new Runnable() {

    @Override
    public void run() {

        boolean downloading = true;

        while (downloading) {

            DownloadManager.Query q = new DownloadManager.Query();
            q.setFilterById(downloadId);

            Cursor cursor = manager.query(q);
            cursor.moveToFirst();
            int bytes_downloaded = cursor.getInt(cursor
                    .getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
            int bytes_total = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES));

            if (cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS)) == DownloadManager.STATUS_SUCCESSFUL) {
                downloading = false;
            }

            final double dl_progress = (bytes_downloaded / bytes_total) * 100;

            runOnUiThread(new Runnable() {

                @Override
                public void run() {

                    mProgressBar.setProgress((int) dl_progress);

                }
            });

            Log.d(Constants.MAIN_VIEW_ACTIVITY, statusMessage(cursor));
            cursor.close();
        }

    }
}).start();

내 statusMessage 메서드 :

private String statusMessage(Cursor c) {
    String msg = "???";

    switch (c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS))) {
    case DownloadManager.STATUS_FAILED:
        msg = "Download failed!";
        break;

    case DownloadManager.STATUS_PAUSED:
        msg = "Download paused!";
        break;

    case DownloadManager.STATUS_PENDING:
        msg = "Download pending!";
        break;

    case DownloadManager.STATUS_RUNNING:
        msg = "Download in progress!";
        break;

    case DownloadManager.STATUS_SUCCESSFUL:
        msg = "Download complete!";
        break;

    default:
        msg = "Download is nowhere in sight";
        break;
    }

    return (msg);
}

내 로그는 완벽하게 작동하고 내 다운로드가 실행되는 동안 "다운로드 진행 중!" "다운로드 완료!"가 완료되었지만 진행 상황에서 동일하지 않습니다. 왜 그런가요? 도움이 정말 필요합니다. 다른 논리도 정말 감사합니다.

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두 개의 정수를 나눕니다.

final double dl_progress = (bytes_downloaded / bytes_total) * 100;

마찬가지로 bytes_downloaded미만이고 bytes_total, (bytes_downloaded / bytes_total)0이되며, 진행 그러므로 항상 0이됩니다.

계산을 다음으로 변경하십시오.

final int dl_progress = (int) ((bytes_downloaded * 100l) / bytes_total);

전체 백분위 수 (하위 임에도 불구하고)의 진행률을 얻습니다.

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Paul's answer is correct but with larger downloads you will hit max int pretty quick and start getting a negative progress. I used this to solve the issue:

final int dl_progress = (int) ((bytes_downloaded * 100l) / bytes_total);

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As paul said, you are dividing two integers, with result always <1.

Always cast your number before divide, which calculate and return in float-point.

Don't forget to handle DivByZero.

final int dl_progress = (int) ((double)bytes_downloaded / (double)bytes_total * 100f);

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In case if someone needs implementation of download progress retriever from @Victor Laerte's question in Kotlin with RxJava here you go:

DownloadStateRetriever.kt

class DownloadStateRetriever(private val downloadManager: DownloadManager) {

    fun retrieve(id: Long) {
        var downloading = AtomicBoolean(true)

        val disposable = Observable.fromCallable {
            val query = DownloadManager.Query().setFilterById(id)
            val cursor = downloadManager.query(query)

            cursor.moveToFirst()

            val bytesDownloaded = cursor.intValue(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR)
            val bytesTotal = cursor.intValue(DownloadManager.COLUMN_TOTAL_SIZE_BYTES)

            if (isSuccessful(cursor)) downloading.set(false)
            cursor.close()

            if (bytesTotal == 0) 0.toInt() else ((bytesDownloaded * 100F) / bytesTotal).toInt()
        }
                .subscribeOn(Schedulers.newThread())
                .delay(1, TimeUnit.SECONDS)
                .repeatUntil { !downloading.get() }
                .subscribe {
                    Timber.i("Subscribed to $id. progress: $it")
                }
    }

    private fun isSuccessful(cursor: Cursor) = status(cursor) == DownloadManager.STATUS_SUCCESSFUL

    private fun status(cursor: Cursor) = cursor.intValue(DownloadManager.COLUMN_STATUS)
}

I have added extensions to cursor for more code clarity:

CursorExtensions.kt

import android.database.Cursor

fun Cursor.column(which: String) = this.getColumnIndex(which)
fun Cursor.intValue(which: String): Int = this.getInt(column(which))
fun Cursor.floatValue(which: String): Float = this.getFloat(column(which))
fun Cursor.stringValue(which: String): String = this.getString(column(which))
fun Cursor.doubleValue(which: String): Double = this.getDouble(column(which))

참고URL : https://stackoverflow.com/questions/15795872/show-download-progress-inside-activity-using-downloadmanager