将图像从android上传到PHP服务器

使用下面的代码。它将执行相同的操作。

public class UploadImage extends Activity {
    InputStream inputStream;
        @Override
    public void onCreate(Bundle icicle) {
            super.onCreate(icicle);
            setContentView(R.layout.main);

            Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.drawable.icon);           ByteArrayOutputStream stream = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.PNG, 90, stream); //compress to which format you want.
            byte [] byte_arr = stream.toByteArray();
            String image_str = Base64.encodeBytes(byte_arr);
            ArrayList<NameValuePair> nameValuePairs = new  ArrayList<NameValuePair>();

            nameValuePairs.add(new BasicNameValuePair("image",image_str));

             Thread t = new Thread(new Runnable() {

            @Override
            public void run() {
                  try{
                         HttpClient httpclient = new DefaultHttpClient();
                         HttpPost httppost = new HttpPost("server-link/folder-name/upload_image.php");
                         httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                         HttpResponse response = httpclient.execute(httppost);
                         String the_string_response = convertResponseToString(response);
                         runOnUiThread(new Runnable() {

                                @Override
                                public void run() {
                                    Toast.makeText(UploadImage.this, "Response " + the_string_response, Toast.LENGTH_LONG).show();                          
                                }
                            });

                     }catch(Exception e){
                          runOnUiThread(new Runnable() {

                            @Override
                            public void run() {
                                Toast.makeText(UploadImage.this, "ERROR " + e.getMessage(), Toast.LENGTH_LONG).show();                              
                            }
                        });
                           System.out.println("Error in http connection "+e.toString());
                     }  
            }
        });
         t.start();
        }

        public String convertResponseToString(HttpResponse response) throws IllegalStateException, IOException{

             String res = "";
             StringBuffer buffer = new StringBuffer();
             inputStream = response.getEntity().getContent();
             int contentLength = (int) response.getEntity().getContentLength(); //getting content length…..
              runOnUiThread(new Runnable() {

            @Override
            public void run() {
                Toast.makeText(UploadImage.this, "contentLength : " + contentLength, Toast.LENGTH_LONG).show();                     
            }
        });

             if (contentLength < 0){
             }
             else{
                    byte[] data = new byte[512];
                    int len = 0;
                    try
                    {
                        while (-1 != (len = inputStream.read(data)) )
                        {
                            buffer.append(new String(data, 0, len)); //converting to string and appending  to stringbuffer…..
                        }
                    }
                    catch (IOException e)
                    {
                        e.printStackTrace();
                    }
                    try
                    {
                        inputStream.close(); // closing the stream…..
                    }
                    catch (IOException e)
                    {
                        e.printStackTrace();
                    }
                    res = buffer.toString();     // converting stringbuffer to string…..

                    runOnUiThread(new Runnable() {

                    @Override
                    public void run() {
                       Toast.makeText(UploadImage.this, "Result : " + res, Toast.LENGTH_LONG).show();
                    }
                });
                    //System.out.println("Response => " +  EntityUtils.toString(response.getEntity()));
             }
             return res;
        }
}

PHP代码

<?php
    $base=$_REQUEST['image'];
     $binary=base64_decode($base);
    header('Content-Type: bitmap; charset=utf-8');
    $file = fopen('uploaded_image.jpg', 'wb');
    fwrite($file, $binary);
    fclose($file);
    echo 'Image upload complete!!, Please check your php file directory……';
?>

更新

不建议使用NameValuePair和Http类，因此，我尝试了此代码，它对我有用。希望有帮助！

private void uploadImage(Bitmap imageBitmap){
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    imageBitmap.compress(Bitmap.CompressFormat.PNG, 90, stream);
    byte[] b = stream.toByteArray();
    String encodedImage = Base64.encodeToString(b, Base64.DEFAULT);
    ArrayList<Pair<String, String>> params = new ArrayList<Pair<String, String>>();
    params.add(new Pair<>("image", encodedImage));

    try {
        new AsyncUploader().execute(my_upload_php, getQuery(params));
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
}

private String getQuery(List<Pair<String, String>> params) throws UnsupportedEncodingException{
    StringBuilder result = new StringBuilder();
    boolean first = true;

    for(Pair<String, String> pair : params){
        if(first)
            first = false;
        else
            result.append("&");

        result.append(URLEncoder.encode(pair.first, "UTF-8"));
        result.append("=");
        result.append(URLEncoder.encode(pair.second, "UTF-8"));
    }
    return result.toString();
}

private class AsyncUploader extends AsyncTask<String, Integer, String>
{
    @Override
    protected String doInBackground(String... strings) {
        String urlString = strings[0];
        String params = strings[1];
        URL url = null;
        InputStream stream = null;
        HttpURLConnection urlConnection = null;
        try {
            url = new URL(urlString);
            urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setRequestMethod("POST");
            urlConnection.setDoOutput(true);

            urlConnection.connect();

            OutputStreamWriter wr = new OutputStreamWriter(urlConnection.getOutputStream());
            wr.write(params);
            wr.flush();

            stream = urlConnection.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(stream, "UTF-8"), 8);
            String result = reader.readLine();
            return result;
        }catch (IOException ioe){
            ioe.printStackTrace();
        } finally {
            if (urlConnection != null)
                urlConnection.disconnect();
        }
        return null;
    }

    @Override
    protected  void onPostExecute(String result) {
        Toast.makeText(MakePhoto.this, result, Toast.LENGTH_SHORT).show();
    }
}