通過藍牙opp在Android上共享文件N

Question

我在試圖通過藍牙共享文件。我已經嘗試了下面兩種方法將文件名傳遞給ACTION_SEND打算。 share活動正在彈出，當我觸摸連接的藍牙設備時，我得到一個敬酒說Bluetooth share: File Unknown file not sent。這兩種方法都失敗了。

public void pushFileOverOpp(String filename) { 
    Intent intent = new Intent(); 
    intent.setAction(Intent.ACTION_SEND); 
    intent.setPackage("com.android.bluetooth"); 
    intent.setType("audio/mp3"); 
    File f = new File(Environment.getExternalStorageDirectory(), "images"); 
    File sample = new File(f, "sample.mp3"); 
    Uri u = Uri.parse(sample.toString()); 
    intent.putExtra(Intent.EXTRA_STREAM, u); 
    mContext.startActivity(intent); 
} 

錯誤，對數似

OppService：URI：/storage/emulated/0/images/sample.mp3 OppService：建議：空 OppService：FILENAME：空 OppService：MIMETYPE：音頻/ MP3

File f = new File(mContext.getFilesDir(), "images"); 
File sample = new File(f, "sample.mp3"); 
Uri u = FileProvider.getUriForFile(mContext, 
      BuildConfig.APPLICATION_ID + ".provider", sample); 
intent.putExtra(Intent.EXTRA_STREAM, u); 

錯誤，對數

OppService：URI：內容：//com.example.com.test.provider/tester/images/sample.mp3 OppService：建議：空 OppService：文件名：空

我已籤android源代碼，當文件名爲空時出現這個錯誤。日誌還說文件名是空的。但我無法弄清楚確切的原因。有人可以請幫我在這裏，我的代碼有什麼問題。

Answer 1

一些研究之後，我明白了問題。有兩個問題 -

用於外部存儲（/ sdcard /）目錄的xml標記在xml文件中是錯誤的。

我改變如下。

<root-path 
    name="root" 
    path="/" /> 

URI權限未被授予

mContext.grantUriPermission("com.android.bluetooth", u, 
      Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION); 

與代碼行上述修改後，文件共享工作！

完全運行代碼 -

public boolean pushFileOverOpp(String filename) { 
    Intent intent = new Intent(); 
    intent.setAction(Intent.ACTION_SEND); 
    intent.setType("*/*"); // supports all mime types 
    intent.setPackage("com.android.bluetooth"); //bluetooth package name, default opp 

    File folder = new File(Environment.getExternalStorageDirectory(), "images"); 
    File file = new File(folder, filename); 
    if (!file.exists()) { 
     Logger.e("No such file " + filename + " exists!"); 
     return false; 
    } 
    Uri u = FileProvider.getUriForFile(mContext, mContext.getPackageName() + ".provider", file); 
    intent.putExtra(Intent.EXTRA_STREAM, u); 

    mContext.grantUriPermission("com.android.bluetooth", u, 
      Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION); 

    Logger.d("Sharing file over bluetooth " + folder.toString()); 
    mContext.startActivity(intent); 
    return true; 
} 

感謝。

Answer 2

請參閱此代碼，它的工作原理和使用createChooser方法共享文件。

  ArrayList<Uri> arrayList2 = new ArrayList<>(); 

      String MEDIA_PATH = new String(Environment.getExternalStorageDirectory() + 
        "/NewCallLogs/audio.mp3"); 

      File files = new File(MEDIA_PATH); 
      Uri u = Uri.fromFile(files); 
      arrayList2.add(u); 

      Intent share = new Intent(android.content.Intent.ACTION_SEND_MULTIPLE); 
      share.setData(Uri.parse("mailto:")); 
      share.setType("audio/mpeg"); 
      share.putExtra(android.content.Intent.EXTRA_STREAM, arrayList2); 
      try { 
       startActivity(Intent.createChooser(share, "Share...")); 
       // getActivity().finish(); 
       Log.i("Finished sharing.", ""); 
      } catch (android.content.ActivityNotFoundException ex) { 
       Toast.makeText(getActivity(), "nothing shared.", Toast.LENGTH_SHORT).show(); 
      } 

用於共享的文件只能在藍牙

ArrayList<Uri> arrayList2 = new ArrayList<>(); 

      String MEDIA_PATH = new String(Environment.getExternalStorageDirectory() + 
        "/NewCallLogs/audio.mp3"); 

      File files = new File(MEDIA_PATH); 
      Uri u = Uri.fromFile(files); 
      arrayList2.add(u); 

      Intent share = new Intent(android.content.Intent.ACTION_SEND); 
      share.setData(Uri.parse("mailto:")); 
      share.setType("audio/mpeg"); 
      share.setPackage("com.android.bluetooth"); 
      share.putExtra(android.content.Intent.EXTRA_STREAM, arrayList2); 
      startActivity(share);