1. //上传图片到服务器

Bitmap bitmap = ………………;//得到图片

ByteArrayOutputStream out=new ByteArrayOutputStream();

try {

out.flush();

bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);//转换为png格式的

out.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

byte[] buffer=out.toByteArray();

byte[] encode=Base64.decode(buffer, Base64.DEFAULT);

String photo=new String(encode);

RequestParams params = new RequestParams();

params.put("ImagefileName", fileName);

params.put("filestream", photo);

String url = URLManage.FileUploadImage();

HttpUtil.post(url, params, new JsonHttpResponseHandler() {

…………

}

//AccountSafeActivity

2.根据名称以及url返回bitmap

private static Bitmap getNetBitmap(String strUrl, String fileName,

Context context) {

Bitmap bitmap = null;

try {

URL url = new URL(strUrl);

HttpURLConnection con = (HttpURLConnection) url.openConnection();

con.setDoInput(true);

con.connect();

InputStream in = con.getInputStream();

bitmap = BitmapFactory.decodeStream(in);

FileOutputStream out = context.openFileOutput(fileName,

Context.MODE_PRIVATE);

bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);

out.flush();

out.close();

in.close();

} catch (Exception e) {

e.printStackTrace();

} finally {

}

使用方式

//从服务器获取imageUrl

final String imageUrl = info.getString("ImageUrl"); int loadversion = info.getInt("Version"); if (!TextUtils.isEmpty(imageUrl)) { if (loadversion > version) { new Thread() { public void run() { getNetBitmap(imageUrl, "load.png", LogoActivity.this); } }.start(); //app.getmSpUtil().setLoadVersion(loadversion); } else { if(bitmap==null) { bitmap = BitmapFactory .decodeStream(LogoActivity.this .openFileInput("load.png")); image.setBackgroundDrawable(new BitmapDrawable(bitmap)); } if(bitmap==null) { image.setBackgroundResource( R.drawable.logo); } } } } else { image.setBackgroundResource(R.drawable.logo); }