點擊網頁鏈接下載應用程序內的文件。

Question

我正在開發像playstore這樣的應用程序，用戶可以在其中下載任何應用程序。我在我的應用程序中有許多應用程序，我通過wp api v2從我的網站獲得了應用程序。當我們點擊任何可用的應用程序細節打開，它有一個下載鏈接。當我們點擊鏈接時，它會進入瀏覽器，但我想要的是當我們點擊任何應用程序下載鏈接下載應該在我的應用程序與進度條開始。我還沒有找到任何適當的解決方案，但在堆棧或任何地方。 Here is the screenshot attached for better understanding. arrow is pointing to the downloading link.

Answer 1

您可以使用intent服務下載應用程序。

下面是代碼：

public class DownloadService extends IntentService { 
File cacheDir; 

public DownloadService() { 
    super("DownloadService"); 
} 

@Override 
public void onCreate() { 
    super.onCreate(); 
    String tmpLocation = 
      Environment.getExternalStorageDirectory().getPath(); 
    cacheDir = new File(tmpLocation); 
    if (!cacheDir.exists()) { 
     cacheDir.mkdirs(); 
    } 
} 

@Override 
protected void onHandleIntent(Intent intent) { 
    String remoteUrl = intent.getExtras().getString("url"); 
    String location; 
    String filename = 
      remoteUrl.substring(
        remoteUrl.lastIndexOf(File.separator) + 1); 
    File tmp = new File(cacheDir.getPath() 
      + File.separator + filename); 
    if (tmp.exists()) { 
     location = tmp.getAbsolutePath(); 

     stopSelf(); 
     return; 
    } 
    try { 
     URL url = new URL(remoteUrl); 
     HttpURLConnection httpCon = 
       (HttpURLConnection) url.openConnection(); 
     if (httpCon.getResponseCode() != 200) 
      throw new Exception("Failed to connect"); 
     InputStream is = httpCon.getInputStream(); 
     ByteArrayOutputStream out = new ByteArrayOutputStream(); 
     byte[] buf = new byte[1024]; 
     int n = 0; 
     while (-1 != (n = is.read(buf))) { 
      out.write(buf, 0, n); 
     } 
     out.close(); 
     is.close(); 
     byte[] response = out.toByteArray(); 
     FileOutputStream fos = new FileOutputStream(tmp); 
     fos.write(response); 
     fos.flush(); 
     fos.close(); 
     is.close(); 
     location = tmp.getAbsolutePath(); 
    } catch (Exception e) { 
     Log.e("Service", "Failed!", e); 
    } 
} 
} 

運行與網址的意圖

Answer 2

通過嘗試此代碼這個服務，你可以把這個鏈接（TextView的）的點擊

    private static void downloadFile(String url, File outputFile) { 
     try { 
      URL u = new URL(url); 
      URLConnection conn = u.openConnection(); 
      int contentLength = conn.getContentLength(); 

      DataInputStream stream = new DataInputStream(u.openStream()); 

      byte[] buffer = new byte[contentLength]; 
      stream.readFully(buffer); 
      stream.close(); 

      DataOutputStream fos = new DataOutputStream(new FileOutputStream(outputFile)); 
      fos.write(buffer); 
      fos.flush(); 
      fos.close(); 
     } catch(FileNotFoundException e) { 
      return; // swallow a 404 
     } catch (IOException e) { 
      return; // swallow a 404 
     } 
    }