Androidのテキストビューにプログレスバーのパーセンテージを取得するにはどうすればよいですか？

Question

私はインターネットからファイルをダウンロードするためにダウンロードマネージャを使用しており、アクティビティの進行状況バーも追加しています。私は、プログレスバーに従ってファイルをダウンロードする割合をAndroidのテキストボックスに取得したいと考えています。これは今まで私が試したことです。

protected ProgressBar mProgressBar; 
protected long downloadId; 
private DownloadManager downloadmanager; 


public void startDownload() { 


    String servicestring = Context.DOWNLOAD_SERVICE; 

    downloadmanager = (DownloadManager) getSystemService(servicestring); 

    Uri uri = Uri 
      .parse("http://filename.mp3"); 
    DownloadManager.Request request = new DownloadManager.Request(uri); 



    request.setDestinationInExternalPublicDir("/Download", "Sinhala.mp3"); 
    downloadId = downloadmanager.enqueue(request); 

    mProgressBar = (ProgressBar)findViewById(R.id.progress_bar); 
    Timer myTimer = new Timer(); 
    myTimer.schedule(new TimerTask() { 
     @Override 
     public void run() { 
      DownloadManager.Query q = new DownloadManager.Query(); 
      q.setFilterById(downloadId); 
      Cursor cursor = downloadmanager.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)); 
      cursor.close(); 

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

      runOnUiThread(new Runnable(){ 
       @Override 
       public void run(){ 

        mProgressBar.setProgress(dl_progress); 

       } 
      }); 

     } 

    }, 0, 10); 

} 

Answer 1

チェックこのコード

public class MainActivity extends AppCompatActivity { 

private ThinDownloadManager downloadManager; 
private static final int DOWNLOAD_THREAD_POOL_SIZE = 4; 

Button mDownload1; 
Button mDownload2; 
Button mDownload3; 
Button mDownload4; 
Button mDownload5; 

Button mStartAll; 
Button mCancelAll; 
Button mListFiles; 

ProgressBar mProgress1; 
ProgressBar mProgress2; 
ProgressBar mProgress3; 
ProgressBar mProgress4; 
ProgressBar mProgress5; 

TextView mProgress1Txt; 
TextView mProgress2Txt; 
TextView mProgress3Txt; 
TextView mProgress4Txt; 
TextView mProgress5Txt; 

private static final String FILE1 = "https://dl.dropboxusercontent.com/u/25887355/test_photo1.JPG"; 
private static final String FILE2 = "https://dl.dropboxusercontent.com/u/25887355/test_photo2.jpg"; 
private static final String FILE3 = "https://dl.dropboxusercontent.com/u/25887355/test_song.mp3"; 
private static final String FILE4 = "https://dl.dropboxusercontent.com/u/25887355/test_video.mp4"; 
private static final String FILE5 = "http://httpbin.org/headers"; 
private static final String FILE6 = "https://dl.dropboxusercontent.com/u/25887355/ThinDownloadManager.tar.gz"; 

MyDownloadDownloadStatusListenerV1 
    myDownloadStatusListener = new MyDownloadDownloadStatusListenerV1(); 

int downloadId1; 
int downloadId2; 
int downloadId3; 
int downloadId4; 
int downloadId5; 
int downloadId6; 

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

    mDownload1 = (Button) findViewById(R.id.button1); 
    mDownload2 = (Button) findViewById(R.id.button2); 
    mDownload3 = (Button) findViewById(R.id.button3); 
    mDownload4 = (Button) findViewById(R.id.button4); 
    mDownload5 = (Button) findViewById(R.id.button_download_headers); 

    mStartAll = (Button) findViewById(R.id.button5); 
    mCancelAll = (Button) findViewById(R.id.button6); 
    mListFiles = (Button) findViewById(R.id.button7); 

    mProgress1Txt = (TextView) findViewById(R.id.progressTxt1); 
    mProgress2Txt = (TextView) findViewById(R.id.progressTxt2); 
    mProgress3Txt = (TextView) findViewById(R.id.progressTxt3); 
    mProgress4Txt = (TextView) findViewById(R.id.progressTxt4); 
    mProgress5Txt = (TextView) findViewById(R.id.progressTxt5); 

    mProgress1 = (ProgressBar) findViewById(R.id.progress1); 
    mProgress2 = (ProgressBar) findViewById(R.id.progress2); 
    mProgress3 = (ProgressBar) findViewById(R.id.progress3); 
    mProgress4 = (ProgressBar) findViewById(R.id.progress4); 
    mProgress5 = (ProgressBar) findViewById(R.id.progress5); 

    mProgress1.setMax(100); 
    mProgress1.setProgress(0); 

    mProgress2.setMax(100); 
    mProgress2.setProgress(0); 

    mProgress3.setMax(100); 
    mProgress3.setProgress(0); 

    mProgress4.setMax(100); 
    mProgress4.setProgress(0); 

    mProgress5.setMax(100); 
    mProgress5.setProgress(0); 

    downloadManager = new ThinDownloadManager(DOWNLOAD_THREAD_POOL_SIZE); 
    RetryPolicy retryPolicy = new DefaultRetryPolicy(); 

    File filesDir = getExternalFilesDir(""); 

    Uri downloadUri = Uri.parse(FILE1); 
    Uri destinationUri = Uri.parse(filesDir+"/test_photo1.JPG"); 
    final DownloadRequest downloadRequest1 = new DownloadRequest(downloadUri) 
      .setDestinationURI(destinationUri).setPriority(DownloadRequest.Priority.LOW) 
      .setRetryPolicy(retryPolicy) 
      .setDownloadContext("Download1") 
      .setStatusListener(myDownloadStatusListener); 

    downloadUri = Uri.parse(FILE2); 
    destinationUri = Uri.parse(filesDir+"/test_photo2.jpg"); 
    final DownloadRequest downloadRequest2 = new DownloadRequest(downloadUri) 
      .setDestinationURI(destinationUri).setPriority(DownloadRequest.Priority.LOW) 
      .setDownloadContext("Download2") 
      .setStatusListener(myDownloadStatusListener); 

    downloadUri = Uri.parse(FILE3); 
    destinationUri = Uri.parse(filesDir+"/test_song.mp3"); 
    final DownloadRequest downloadRequest3 = new DownloadRequest(downloadUri) 
      .setDestinationURI(destinationUri).setPriority(DownloadRequest.Priority.HIGH) 
      .setDownloadContext("Download3") 
      .setStatusListener(myDownloadStatusListener); 

    downloadUri = Uri.parse(FILE4); 
    destinationUri = Uri.parse(filesDir+"/mani/test/aaa/test_video.mp4"); 
    // Define a custom retry policy 
    retryPolicy = new DefaultRetryPolicy(5000, 3, 2f); 
    final DownloadRequest downloadRequest4 = new DownloadRequest(downloadUri) 
      .setRetryPolicy(retryPolicy) 
      .setDestinationURI(destinationUri).setPriority(DownloadRequest.Priority.HIGH) 
      .setDownloadContext("Download4") 
      .setStatusListener(myDownloadStatusListener); 

    downloadUri = Uri.parse(FILE5); 
    destinationUri = Uri.parse(filesDir+"/headers.json"); 
    final DownloadRequest downloadRequest5 = new DownloadRequest(downloadUri) 
      .addCustomHeader("Auth-Token", "myTokenKey") 
      .addCustomHeader("User-Agent", "Thin/Android") 
      .setDestinationURI(destinationUri).setPriority(DownloadRequest.Priority.HIGH) 
      .setDownloadContext("Download5") 
      .setStatusListener(myDownloadStatusListener); 

    downloadUri = Uri.parse(FILE6); 
    destinationUri = Uri.parse(filesDir+"/wtfappengine.zip"); 
    final DownloadRequest downloadRequest6 = new DownloadRequest(downloadUri) 
      .setDestinationURI(destinationUri).setPriority(DownloadRequest.Priority.HIGH) 
      .setDownloadContext("Download6") 
      .setStatusListener(myDownloadStatusListener); 

    mDownload1.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      if (downloadManager.query(downloadId1) == DownloadManager.STATUS_NOT_FOUND) { 
       downloadId1 = downloadManager.add(downloadRequest1); 
      } 
     } 
    }); 

    mDownload2.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      if (downloadManager.query(downloadId2) == DownloadManager.STATUS_NOT_FOUND) { 
       downloadId2 = downloadManager.add(downloadRequest2); 
      } 
     } 
    }); 

    mDownload3.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      if (downloadManager.query(downloadId3) == DownloadManager.STATUS_NOT_FOUND) { 
       downloadId3 = downloadManager.add(downloadRequest3); 
      } 
     } 
    }); 

    mDownload4.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      if (downloadManager.query(downloadId4) == DownloadManager.STATUS_NOT_FOUND) { 
       downloadId4 = downloadManager.add(downloadRequest4); 
      } 
     } 
    }); 

    mDownload5.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      //if (downloadManager.query(downloadId5) == DownloadManager.STATUS_NOT_FOUND) { 
      // downloadId5 = downloadManager.add(downloadRequest5); 
      //} 

      if (downloadManager.query(downloadId6) == DownloadManager.STATUS_NOT_FOUND) { 
       downloadId6 = downloadManager.add(downloadRequest6); 
      } 

     } 
    }); 

    mStartAll.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      downloadManager.cancelAll(); 
      downloadId1 = downloadManager.add(downloadRequest1); 
      downloadId2 = downloadManager.add(downloadRequest2); 
      downloadId3 = downloadManager.add(downloadRequest3); 
      downloadId4 = downloadManager.add(downloadRequest4); 
      downloadId5 = downloadManager.add(downloadRequest5); 
     } 
    }); 

    mCancelAll.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      downloadManager.cancelAll(); 
     } 
    }); 

    mListFiles.setOnClickListener(new View.OnClickListener() { 
     @Override public void onClick(View v) { 
      showInternalFilesDir(); 
     } 
    }); 

    mProgress1Txt.setText("Download1"); 
    mProgress2Txt.setText("Download2"); 
    mProgress3Txt.setText("Download3"); 
    mProgress4Txt.setText("Download4"); 
    mProgress5Txt.setText("Download5"); 
} 

@Override 
protected void onDestroy() { 
    super.onDestroy(); 
    System.out.println("######## onDestroy ######## "); 
    downloadManager.release(); 
} 

private void showInternalFilesDir() { 
    File internalFile = new File(getExternalFilesDir("").getPath()); 
    File files[] = internalFile.listFiles(); 
    String contentText = ""; 
    if(files.length == 0) { 
     contentText = "No Files Found"; 
    } 

    for (File file : files) { 
     contentText += file.getName()+" "+file.length()+" \n\n "; 
    } 

    AlertDialog.Builder builder = new AlertDialog.Builder(this); 
    AlertDialog internalCacheDialog = builder.create(); 
    LayoutInflater inflater = internalCacheDialog.getLayoutInflater(); 
    View dialogLayout = inflater.inflate(R.layout.layout_files, null); 
    TextView content = (TextView) dialogLayout.findViewById(R.id.filesList); 
    content.setText(contentText); 

    builder.setView(dialogLayout); 
    builder.show(); 

} 

class MyDownloadDownloadStatusListenerV1 implements DownloadStatusListenerV1 { 

    @Override 
    public void onDownloadComplete(DownloadRequest request) { 
     final int id = request.getDownloadId(); 
     if (id == downloadId1) { 
      mProgress1Txt.setText(request.getDownloadContext() + " id: "+id+" Completed"); 

     } else if (id == downloadId2) { 
      mProgress2Txt.setText(request.getDownloadContext() + " id: "+id+" Completed"); 

     } else if (id == downloadId3) { 
      mProgress3Txt.setText(request.getDownloadContext() + " id: "+id+" Completed"); 

     } else if (id == downloadId4) { 
      mProgress4Txt.setText(request.getDownloadContext() + " id: "+id+" Completed"); 
     } else if (id == downloadId5) { 
      mProgress5Txt.setText(request.getDownloadContext() + " id: "+id+" Completed"); 
     } 
    } 

    @Override 
    public void onDownloadFailed(DownloadRequest request, int errorCode, String errorMessage) { 
     final int id = request.getDownloadId(); 
     if (id == downloadId1) { 
      mProgress1Txt.setText("Download1 id: "+id+" Failed: ErrorCode "+errorCode+", "+errorMessage); 
      mProgress1.setProgress(0); 
     } else if (id == downloadId2) { 
      mProgress2Txt.setText("Download2 id: "+id+" Failed: ErrorCode "+errorCode+", "+errorMessage); 
      mProgress2.setProgress(0); 

     } else if (id == downloadId3) { 
      mProgress3Txt.setText("Download3 id: "+id+" Failed: ErrorCode "+errorCode+", "+errorMessage); 
      mProgress3.setProgress(0); 

     } else if (id == downloadId4) { 
      mProgress4Txt.setText("Download4 id: "+id+" Failed: ErrorCode "+errorCode+", "+errorMessage); 
      mProgress4.setProgress(0); 
     } else if (id == downloadId5) { 
      mProgress5Txt.setText("Download5 id: "+id+" Failed: ErrorCode "+errorCode+", "+errorMessage); 
      mProgress5.setProgress(0); 
     } 
    } 

    @Override 
    public void onProgress(DownloadRequest request, long totalBytes, long downloadedBytes, int progress) { 
     int id = request.getDownloadId(); 

     System.out.println("######## onProgress ###### "+id+" : "+totalBytes+" : "+downloadedBytes+" : "+progress); 
     if (id == downloadId1) { 
      mProgress1Txt.setText("Download1 id: "+id+", "+progress+"%"+" "+getBytesDownloaded(progress,totalBytes)); 
      mProgress1.setProgress(progress); 

     } else if (id == downloadId2) { 
      mProgress2Txt.setText("Download2 id: "+id+", "+progress+"%"+" "+getBytesDownloaded(progress,totalBytes)); 
      mProgress2.setProgress(progress); 

     } else if (id == downloadId3) { 
      mProgress3Txt.setText("Download3 id: "+id+", "+progress+"%"+" "+getBytesDownloaded(progress,totalBytes)); 
      mProgress3.setProgress(progress); 

     } else if (id == downloadId4) { 
      mProgress4Txt.setText("Download4 id: "+id+", "+progress+"%"+" "+getBytesDownloaded(progress,totalBytes)); 
      mProgress4.setProgress(progress); 
     } else if (id == downloadId5) { 
      mProgress5Txt.setText("Download5 id: "+id+", "+progress+"%"+" "+getBytesDownloaded(progress,totalBytes)); 
      mProgress5.setProgress(progress); 
     } else if (id == downloadId6) { 
      mProgress5Txt.setText("Download6 id: "+id+", "+progress+"%"+" "+getBytesDownloaded(progress,totalBytes)); 
      mProgress5.setProgress(progress); 
     } 
    } 
} 

private String getBytesDownloaded(int progress, long totalBytes) { 
    //Greater than 1 MB 
    long bytesCompleted = (progress * totalBytes)/100; 
    if (totalBytes >= 1000000) { 
     return (""+(String.format("%.1f", (float)bytesCompleted/1000000))+ "/"+ (String.format("%.1f", (float)totalBytes/1000000)) + "MB"); 
    } if (totalBytes >= 1000) { 
     return (""+(String.format("%.1f", (float)bytesCompleted/1000))+ "/"+ (String.format("%.1f", (float)totalBytes/1000)) + "Kb"); 

    } else { 
     return (""+bytesCompleted+"/"+totalBytes); 
    } 
} 

}