从互联网下载图像损失透明度

Question

当我从互联网上下载图像并保存到SD卡时，当原始图像没有

时，图像会出现黑色背景

httpRequest = new HttpGet(fileUrl);
 HttpClient httpclient = new DefaultHttpClient();
 HttpResponse response = (HttpResponse) httpclient.execute(httpRequest);
 HttpEntity entity = response.getEntity();
 BufferedHttpEntity bufHttpEntity = new BufferedHttpEntity(entity);
 InputStream instream = bufHttpEntity.getContent();
 Bitmap    bm = BitmapFactory.decodeStream(instream);
 String file_path = Environment.getExternalStorageDirectory()+File.separator+"basquetMobile-  images";
 File dir = new File(file_path);     
 if(!dir.exists())
        dir.mkdirs();
 File file = new File(dir, tipoImagen+idEquipo+".jpg");
 FileOutputStream fOut = new FileOutputStream(file);
 bm.compress(Bitmap.CompressFormat.JPEG, 75, fOut);
 fOut.flush();
 fOut.close();

感谢您的帮助!!

＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT; [解决方案]＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆GT;＆GT;＆GT;＆GT;＆GT;

变化：

档案文件=新档案（dir，tipoImagen + idEquipo +“ .png ”）;

bm.compress（Bitmap.CompressFormat.PNG，100，fOut）;

＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;＆GT;感谢和LT;！＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆LT;＆GT;＆GT;＆GT;＆GT;＆GT;

Answer 1

变化：

文件档案=新档案（dir，tipoImagen + idEquipo +“。png”）;

bm.compress（Bitmap.CompressFormat.PNG，100，fOut）;