在android中使用google翻译

package com.eg.android.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;

import org.json.JSONObject;

import android.util.Log;

public class Translate {
	private static final String TAG = "Translate";

	private static final String ENCODING = "UTF-8";
	private static final String TRANS_URL = "http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q=";
	private static final String LANGPAIR_TEXT = "&langpair=";
	private static final String LANGPAIR_SEPARTOR = "%7C";

	public static String retrieveTranslation(String text, String from, String to) {
		String result = null;
		HttpURLConnection conn = null;
		try {
			StringBuilder strBuilder = new StringBuilder();
			String url = strBuilder.append(TRANS_URL)
					.append(URLEncoder.encode(text, ENCODING))
					.append(LANGPAIR_TEXT).append(from)
					.append(LANGPAIR_SEPARTOR).append(to).toString();
			Log.d(TAG, "Connecting to " + url);
			
			conn = (HttpURLConnection) new URL(url).openConnection();
			
			String respStr = getResponseString(conn.getInputStream());

			JSONObject json = new JSONObject(respStr);
			result = ((JSONObject) json.get("responseData"))
					.getString("translatedText");
		} catch (Exception e) {
			Log.e(TAG, "translation fail!!");
		} finally { 
			try {
				if(conn != null) {
					conn.getInputStream().close();
					if (conn.getErrorStream() != null) 
						conn.getErrorStream().close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
        }
		return result;
	}

	private static String getResponseString(InputStream inputStream) {
		StringBuilder outputBuilder = new StringBuilder();
		BufferedReader reader = null;
		try {
			String str = null;
			if (inputStream != null) {
				reader = new BufferedReader(new InputStreamReader(inputStream,
						ENCODING));
				while ((str = reader.readLine()) != null) {
					outputBuilder.append(str);
				}
			}
		} catch (Exception e) {
			Log.e(TAG,"[google-api-translate-java] Error reading translation stream.");
		} finally {
			try {
				if (reader != null)
					reader.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return outputBuilder.toString();
	}

}

String res = Translate.retrieveTranslation("将这行中文翻译为英文", "zh-CN", "en");