將字符串路徑轉換爲輸入流

我正在開發使用Quickblox聊天API的聊天應用程序並且目前已完成用戶註冊，身份驗證和基本對等聊天和羣聊。現在正在實現視頻，圖像和文件發送但是有些部分已經出現。將字符串路徑轉換爲輸入流

從SD卡中選擇圖像。返回字符串中的圖片路徑，並且不轉換爲inputStream。已經在SOF上嘗試了約10-15個答案。我的代碼如下：

Intent i = new Intent(Intent.ACTION_PICK, 
      android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 

    startActivityForResult(i, RESULT_LOAD_IMAGE);

保護無效onActivityResult（INT requestCode，INT發送resultCode，意圖數據）{ super.onActivityResult（requestCode，resultCode爲，數據）;

if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) { 


    Uri selectedImage = data.getData(); 
    String[] filePathColumn = { MediaStore.Images.Media.DATA }; 

    Cursor cursor = getContentResolver().query(selectedImage, 
      filePathColumn, null, null, null); 
    cursor.moveToFirst(); 

    int columnIndex = cursor.getColumnIndex(filePathColumn[0]); 
    String picturePath = cursor.getString(columnIndex); 
    cursor.close(); 

    Bitmap imagebitmap=BitmapFactory.decodeFile(picturePath); 

    byte[] b=picturePath.getBytes(Charset.forName("UTF-8")); 

    InputStream is = new ByteArrayInputStream(b); 

    File newFile = FileHelper.getFileInputStream(is, "sample.jpg", "myFile"); 

    Boolean fileIsPublic = false; 

    QBContent.uploadFileTask(newFile, fileIsPublic, null, new QBEntityCallbackImpl<QBFile>() 
      { 
     public void onSuccess(QBFile file, Bundle params) { 

      //creating message 

      QBChatMessage chatmessage=new QBChatMessage(); 
      chatmessage.setProperty("save_to_history", "1"); //saves messsage to history 

      QBAttachment qbAttachment=new QBAttachment("photo"); 
      qbAttachment.setId(file.getId().toString()); 

      chatmessage.addAttachment(qbAttachment); 

      try 
      { 
       chat.sendMessage(chatmessage); 

       Toast.makeText(getApplicationContext(), "Image Uploaded Successfully", Toast.LENGTH_SHORT).show(); 

      } catch (XMPPException e) { 
       Log.e(TAG, "failed to send a image", e); 
      } catch (SmackException sme){ 
       Log.e(TAG, "failed to send a image", sme); 
      } 

     } 

     public void onError(java.util.List<String> errors) { 

      AlertDialog.Builder dialog = new AlertDialog.Builder(ChatActivity.this); 
      dialog.setMessage("error when sending image: " + errors.toString()).create().show(); 


     };});}

已經嘗試這些代碼也用於產生的InputStream

InputStream爲=新ByteArrayInputStream的（。picturePath.toString（）的getBytes（Charset.defaultCharset（）））;
try { is = IOUtils.toInputStream(picturePath, "UTF-8"); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); }

content panel of quickblox shows this output... where size(kb) refers to static trial images i sent...and 1 kb size is dynamic images i selected.

代碼生成MYFILE夾新sample.jpg。它不創建。其破損。但如果我選擇靜態然後它完美的作品。

謝謝你在adv。不知道我在做什麼錯...任何幫助將非常明顯 2.我

來源

2015-03-02 SK16

你的目標版本是什麼？ – vojta 2015-03-02 09:41:08

這可能是你的問題：http://stackoverflow.com/questions/26744842/how-to-use-the-new-sd-card-access-api-presented-for-lollipop – vojta 2015-03-02 09:42:48

@vojta其21 ... – SK16 2015-03-02 10:25:40

經過大量的努力和代碼更改我做了我所需要的。我使用了ByteArrayInputStream，而不是使用inputstream。首先轉換我的字符串picturepath位圖（不知道爲什麼我這樣做..但沒有）十轉換該位圖使用ByteArrayInputStream進行下面的代碼

ByteArrayOutputStream bos = new ByteArrayOutputStream(); 
     imagebitmap.compress(CompressFormat.PNG, 0 /*ignored for PNG*/, bos); 
     byte[] bitmapdata = bos.toByteArray(); 
     ByteArrayInputStream bs = new ByteArrayInputStream(bitmapdata);

和結果發送到我的功能....成功。。！

來源

2015-03-03 14:26:52 SK16

將字符串路徑轉換爲輸入流

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