将图像附加到电子邮件

Question

编写从相机拍摄照片并将其作为位图检索的应用程序。然后我把这个文件写到磁盘上，然后尝试将图片作为电子邮件发送，在gmail应用中它说有一个附件，但是当我收到电子邮件时没有附加任何文件。以下是我尝试工作的两种适当方法。

protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if (requestCode == CAMERA_PIC_REQUEST) { 
    thumbnail = (Bitmap) data.getExtras().get("data"); 
    ImageView image = (ImageView) findViewById(R.id.photoResultView); 
    image.setImageBitmap(thumbnail); 


    try { 
      pic = new File("pic"); 

     FileOutputStream out = new FileOutputStream(pic); 
     thumbnail.compress(CompressFormat.PNG, 100, out); 
     out.flush(); 
     out.close(); 

    } 
    catch (java.io.FileNotFoundException e) { 
     // that's OK, we probably haven't created it yet 
    } 
    catch (Throwable t) { 
     Toast 
      .makeText(this, "Exception: "+t.toString(), Toast.LENGTH_LONG) 
      .show(); 

    } 
    sendPictureButton.setVisibility(Button.VISIBLE); 
    } 
} 
private OnClickListener sendPictureButtonListener = new OnClickListener() { 

    @Override 
    public void onClick(View arg0){ 

     Intent i = new Intent(Intent.ACTION_SEND); 
     i.putExtra(Intent.EXTRA_EMAIL, new String[]{"[email protected]"}); 
     i.putExtra(Intent.EXTRA_SUBJECT,"On The Job"); 
     i.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(pic)); 

     i.setType("image/png"); 
     startActivity(Intent.createChooser(i,"Share you on the jobing")); 

    } 
    }; 

Answer 1

首先需要访问SD卡，然后找到它并写入并获取文件的URI。

下面是功能代码：

protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if (requestCode == CAMERA_PIC_REQUEST) { 
    thumbnail = (Bitmap) data.getExtras().get("data"); 
    ImageView image = (ImageView) findViewById(R.id.photoResultView); 
    image.setImageBitmap(thumbnail); 


     try { 
      File root = Environment.getExternalStorageDirectory(); 
      if (root.canWrite()){ 
       pic = new File(root, "pic.png"); 
       FileOutputStream out = new FileOutputStream(pic); 
       thumbnail.compress(CompressFormat.PNG, 100, out); 
       out.flush(); 
       out.close(); 
      } 
     } catch (IOException e) { 
      Log.e("BROKEN", "Could not write file " + e.getMessage()); 
     } 
    sendPictureButton.setVisibility(Button.VISIBLE); 
    } 
} 


private OnClickListener takePictureButtonListener = new OnClickListener() { 

    @Override 
    public void onClick(View arg0){ 
     Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
     startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST); 

    } 
    }; 

    private OnClickListener sendPictureButtonListener = new OnClickListener() { 

    @Override 
    public void onClick(View arg0){ 

     Intent i = new Intent(Intent.ACTION_SEND); 
     i.putExtra(Intent.EXTRA_EMAIL, new String[]{"[email protected]"}); 
     i.putExtra(Intent.EXTRA_SUBJECT,"On The Job"); 
     //Log.d("[email protected][email protected]#!#[email protected]##!", Uri.fromFile(pic).toString() + " " + pic.exists()); 
     i.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(pic)); 

     i.setType("image/png"); 
     startActivity(Intent.createChooser(i,"Share you on the jobing")); 
    } 
    }; 

Answer 2

我有一个同事谁了这个问题，它永远不会创建该文件，确保文件确实，当你试图把它存在与此相伴请确保您有权限的需要访问磁盘驱动器。