在邮件中添加图片附件以及图片不能适用整个屏幕

Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND); 
emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT,getResources().getString(R.string.emlSendToFriendSubject)); 
emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL,new String[]{emailto}); 
emailIntent.setType("text/plain"); 
emailIntent.putExtra(android.content.Intent.EXTRA_TEXT,getResources().getString(R.string.emlSendToFriendBody)); 
File file = getFileStreamPath(EMAIL_TEMP_FILE); 
emailIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); 
emailIntent.setType("image/jpeg"); 
emailIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://"+file.getAbsolutePath())); 
startActivityForResult(Intent.createChooser(emailIntent, getResources().getString(R.string.btnSendToFriend)),ActMain.EMAIL_DONE);

 
        android:id='@+id/splash_medium' 
 
        android:layout_width="fill_parent"  
        android:layout_height="fill_parent"  
 
        android:src="@drawable/wallpaper320x480" 
         />