在WebView中單擊鏈接時顯示pdf android

Question

我使用Web視圖在我的應用程序內顯示網站，並且該網站包含指向PDF文件的鏈接。但是當按下這個鏈接時，Web View將顯示一個空白頁面而不是PDF文件。無論如何，我可以讓它正確顯示PDF文件嗎？

在此先感謝。

Answer 1

您可以創建一個意向來打開PDF文件：

@Override 
public boolean launchPDF(WebView view, String url) { 
    if (urlIsPDF(url)){ 
     Intent intent = new Intent(Intent.ACTION_VIEW); 
     intent.setDataAndType(Uri.parse(url), "application/pdf"); 
     try{ 
      view.getContext().startActivity(intent); 
     } catch (ActivityNotFoundException e) { 
      //user does not have a pdf viewer installed 
     } 
    } else { 
     webview.loadUrl(url); 
    } 
    return true; 
} 

然後每當用戶點擊的網頁視圖內頁面的PDF鏈接，該文件將在外部PDF應用中打開。

或者你可以使用谷歌文件啓動它們：

String googleDocs = "https://docs.google.com/viewer?url="; 
String pdf_url = "http://www.somedomain.com/new.pdf"; 

webView.loadUrl(googleDocs + pdf_url); 

請記住，使用互聯網的權限。

Answer 2

簡單opne DOC/PDF等

public static void openFile(Context context, String url) throws IOException { 
    // Create URI 
    Uri uri = Uri.parse(url); 

    Intent intent = new Intent(Intent.ACTION_VIEW); 
    // Check what kind of file you are trying to open, by comparing the url with extensions. 
    // When the if condition is matched, plugin sets the correct intent (mime) type, 
    // so Android knew what application to use to open the file 
    if (url.toString().contains(".doc") || url.toString().contains(".docx")) { 
     // Word document 
     intent.setDataAndType(uri, "application/msword"); 
    } else if(url.toString().contains(".pdf")) { 
     // PDF file 
     intent.setDataAndType(uri, "application/pdf"); 
    } else if(url.toString().contains(".ppt") || url.toString().contains(".pptx")) { 
     // Powerpoint file 
     intent.setDataAndType(uri, "application/vnd.ms-powerpoint"); 
    } else if(url.toString().contains(".xls") || url.toString().contains(".xlsx")) { 
     // Excel file 
     intent.setDataAndType(uri, "application/vnd.ms-excel"); 
    } else if(url.toString().contains(".zip") || url.toString().contains(".rar")) { 
     // WAV audio file 
     intent.setDataAndType(uri, "application/x-wav"); 
    } else if(url.toString().contains(".rtf")) { 
     // RTF file 
     intent.setDataAndType(uri, "application/rtf"); 
    } else if(url.toString().contains(".wav") || url.toString().contains(".mp3")) { 
     // WAV audio file 
     intent.setDataAndType(uri, "audio/x-wav"); 
    } else if(url.toString().contains(".gif")) { 
     // GIF file 
     intent.setDataAndType(uri, "image/gif"); 
    } else if(url.toString().contains(".jpg") || url.toString().contains(".jpeg") || url.toString().contains(".png")) { 
     // JPG file 
     intent.setDataAndType(uri, "image/jpeg"); 
    } else if(url.toString().contains(".txt")) { 
     // Text file 
     intent.setDataAndType(uri, "text/plain"); 
    } else if(url.toString().contains(".3gp") || url.toString().contains(".mpg") || url.toString().contains(".mpeg") || url.toString().contains(".mpe") || url.toString().contains(".mp4") || url.toString().contains(".avi")) { 
     // Video files 
     intent.setDataAndType(uri, "video/*"); 
    } else { 
     //if you want you can also define the intent type for any other file 

     //additionally use else clause below, to manage other unknown extensions 
     //in this case, Android will show all applications installed on the device 
     //so you can choose which application to use 
     intent.setDataAndType(uri, "*/*"); 
    } 

    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
    context.startActivity(intent); 
}