Question

我正在使用base64将图像上传到服务器，如果图像很小但是工作正常但是如果图像很大则会给我带来内存异常

try {
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
        bitmap.recycle();
        byte[] byteArray = stream.toByteArray();
        stream.close();
        stream = null;
        String ba1 = Base64.encodeToString(byteArray, Base64.DEFAULT);

        bitmap = null;
        System.gc(); // immediately free bitmap

        byteArray = null;
        System.gc();
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(Data.upload_photo);

        JSONObject jsonObj = new JSONObject();
        jsonObj.put("user_id", LoginParser.id);
        int cnt = ba1.length() / 4;
        System.out.println("cnt=>" + cnt);
        jsonObj.put("image", ba1);

        jsonObj.put("caption", edt_caption.getText().toString());
        // Create the POST object and add the parameters

        /*
         * StringEntity entity = new StringEntity(jsonObj.toString(),
         * HTTP.UTF_8); System.out.println(entity);
         * entity.setContentType("application/json");
         * httppost.setEntity(entity);
         * 
         * HttpResponse response = httpclient.execute(httppost);
         */

        StringEntity se = new StringEntity(jsonObj.toString());
        // se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,
        // "application/json"));
        se.setContentType("application/json");
        httppost.setEntity(se);
        HttpResponse response = httpclient.execute(httppost);

        String result = EntityUtils.toString(response.getEntity());
        System.out.println("=>=>" + result);
        JSONObject jsonObject = new JSONObject(result);
        if (jsonObject.getString("status").equals("success"))
            return "success";
        else
            return jsonObject.getString("message");
    } catch (IOException e) {
        e.printStackTrace();
    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return null;
}

Answer 1

尝试使用此代码一次。

ByteArrayOutputStream bao = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.JPEG, 90, bao);
byte[] ba = bao.toByteArray();
String ba1 = Base64.encodeBytes(ba);
ArrayList < NameValuePair > nameValuePairs = new
ArrayList < NameValuePair > ();
nameValuePairs.add(new BasicNameValuePair("image", ba1));
try {
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new
    HttpPost("URL STRING");
    httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
    HttpResponse response = httpclient.execute(httppost);
    HttpEntity entity = response.getEntity();
    is = entity.getContent();
    //Toast.makeText(SignUpActivity.this, "Joining Failed", Toast.LENGTH_SHORT).show();
} catch (Exception e) {
    Log.e("log_tag", "Error in http connection " + e.toString());
}

如果您有任何疑问，我可以帮助您。

Android使用base64将图像上传到服务器

1 个答案: