内存不足错误，当将图像从安卓发送到php服务器时

我试图将图像从我的SD卡发送到php服务器...我创建了 2 个类：第一个是 MainActivity.java第二个是 Base64.java它以 Base64 格式编码字节。

我的主要活动.java是：

public class MainActivity extends Activity {
    InputStream inputStream;
    @Override
public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.activity_main);
        Bitmap bitmap = BitmapFactory.decodeFile("/sdcard/DCIM/Camera/1378889572299.jpg");
        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));
Log.e("ok", "1");
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://myserver.com/upload_image.php");
Log.e("ok", "3");
try {
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
Log.e("ok", "4");
HttpResponse response = httpclient.execute(httppost);
Log.e("ok", "5");
    String the_string_response = convertResponseToString(response);
} catch (IllegalStateException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}
    }
    public String convertResponseToString(HttpResponse response) throws IllegalStateException, IOException{
        String res = "";
         StringBuffer buffer = new StringBuffer();
         inputStream = response.getEntity().getContent();
         final int contentLength = (int) response.getEntity().getContentLength(); //getting content length…..
          runOnUiThread(new Runnable() {
        @Override
        public void run() {
            Toast.makeText(MainActivity.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…..
                final String res2 = res;
                runOnUiThread(new Runnable() {
                @Override
                public void run() {
                   Toast.makeText(MainActivity.this, "Result : " + res2, Toast.LENGTH_LONG).show();
                }
            });
                //System.out.println("Response => " +  EntityUtils.toString(response.getEntity()));
         }
         return res;
    }
}

我有这个错误：

........OutOfMemoryError
….at java.lang.AbstractStringBuilder.(AbstractStringBuilder.java:81)
….at java.lang.StringBuilder.(StringBuilder.java:68)
….at java.net.URLEncoder.encode(URLEncoder.java:98)
….at org.apache.http.client.utils.URLEncodedUtils.encode(URLEncodedUtils.java:184)
….at org.apache.http.client.utils.URLEncodedUtils.format(URLEncodedUtils.java:163)
….at org.apache.http.client.entity.UrlEncodedFormEntity.(UrlEncodedFormEntity.java:71)
….at com.example.imageuploadonserver.MainActivity.onCreate(MainActivity.java:43)

第 43 行是：httppost.setEntity（new UrlEncodedFormEntity（nameValuePairs））;

我对我的代码进行了一些更改...我将图像源从SD卡替换到drawabel.ic_luncher：

Bitmap bitmap = BitmapFactory.decodeFile(“/sdcard/DCIM/Camera/1378889572299.jpg”);

通过这个：

Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.drawable.ic_launcher);

它成功地工作!!!

用谷歌搜索了很多，但要么我使用了错误的关键字，要么互联网上没有简单的解决方案。我希望这里有人可以帮助我。

提前致以最诚挚的问候和感谢，法德尔。