Android ขอคำแนะนะหน่อยค่ะ การเรียกใช้งาน function 2 function ที่อยู่ class เดียวกันจะต้องใช้อย่างไรค่ะ

public class SchemeMainActivity extends Activity {
	
	
	@Override
    protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		 Uri uri = getIntent().getData();
	        if(uri != null) {
	        	
	        }
	        //Log.i("Check", "Parameter : " + uri.getQuery() );
	        Log.i("Check", "Authority : " + uri.getAuthority());
	        // Log.i("Check", "PackageName : " + getPackageName() );
	        Log.i("Check", "Data : " + uri);
	        //String uri = getData().getQueryParameter("abcd"); 
	          
    	}

	public String getJSON(String address,List<NameValuePair> params) {
		
		String readJSON = getJSON("http://exptown.com/dev/query.php?rm=abcde", params);
        
		try{
        	JSONObject jsonObject = new JSONObject(readJSON);
        	Log.i(MainActivity.class.getName(), jsonObject.getString(""));
        
        } catch(Exception e)
        {e.printStackTrace();}
        finally{System.out.println("Success");}
		
    	StringBuilder builder = new StringBuilder();
    	HttpClient client = new DefaultHttpClient();
    	HttpGet httpGet = new HttpGet(address);
    	HttpPost httpPost = new HttpPost(address);
    	 
    	try{
    		httpPost.setEntity(new UrlEncodedFormEntity(params));
    		HttpResponse response = client.execute(httpGet);
    		StatusLine statusLine = response.getStatusLine();
    		int statusCode = statusLine.getStatusCode();
    		
    		if(statusCode == 200){
    			HttpEntity entity = response.getEntity();
    			InputStream content = entity.getContent();
    			BufferedReader reader = new BufferedReader(new InputStreamReader(content));
    			String line;
    			while((line = reader.readLine()) != null){
    				builder.append(line);
    			}
    		} else {
    			Log.e("Log", "Failed to download file..");
    		}
    		
    	}catch(ClientProtocolException e)
    	{
    		e.printStackTrace();
    	} catch (IOException e)
    	{
    		e.printStackTrace();
    	}
    	return builder.toString();
    	
    }
	
	}