中英翻译（基于百度翻译）
先来看效果图
只做了简单的在线翻译，语音翻译和图片翻译都要钱，哈哈
市面上有名气的翻译公司就是有道和百度了，有道尝试了一下，分为API和SDK两种，但是demo下载下来跑不了
百度的就是API，也很简单，就是通过百度的协议去请求他们的服务器，得到翻译后的值，每个月有200万的免费，够用了
百度文档地址http://api.fanyi.baidu.com/api/trans/product/apidoc#joinFile
步骤：
java版demo下载地址https://fanyiapp.cdn.bcebos.com/api/demo/java.zip
下面是核心代码
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<EditText
android:id="@+id/inputChinese"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入要翻译的中文"
android:singleLine="true" />
<EditText
android:id="@+id/inputEnglish"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入要翻译的英文"
android:singleLine="true" />
<TextView
android:id="@+id/translate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_margin="10dp"
android:padding="10dp"
android:text="翻译"
android:textSize="20sp" />
<TextView
android:id="@+id/outputEnglish"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
tools:text="得到的英文" />
<TextView
android:id="@+id/outputChinese"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
tools:text="得到的中文" />
</LinearLayout>
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class MainActivity extends AppCompatActivity {
private static final String APP_ID = "20190603000304432";
private static final String SECURITY_KEY = "gZTcFc0TyR6tZS5FfmyA";
private EditText inputChinese;
private EditText inputEnglish;
private TextView outputEnglish;
private TextView outputChinese;
private TextView translate;
private TransApi api;
private static final int CHINESE = 1;
private static final int ENGLISH = 2;
private static final String TO_ENGLISH = "en";
private static final String TO_CHINESE = "zh";
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
String str = String.valueOf(msg.obj);
String value = parserJson(str);
switch (msg.what) {
case CHINESE:
outputChinese.setText(value);
break;
case ENGLISH:
outputEnglish.setText(value);
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
api = new TransApi(APP_ID, SECURITY_KEY);
translate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
translate(inputChinese.getText().toString(), TO_ENGLISH);
translate(inputEnglish.getText().toString(), TO_CHINESE);
}
});
}
private void initView() {
inputChinese = findViewById(R.id.inputChinese);
inputEnglish = findViewById(R.id.inputEnglish);
outputEnglish = findViewById(R.id.outputEnglish);
outputChinese = findViewById(R.id.outputChinese);
translate = findViewById(R.id.translate);
}
private void translate(final String chinese, final String toLanguage) {
new Thread(new Runnable() {
@Override
public void run() {
String transResult = api.getTransResult(chinese, "auto", toLanguage);
Message message = new Message();
switch (toLanguage) {
case TO_CHINESE:
message.what = CHINESE;
break;
case TO_ENGLISH:
message.what = ENGLISH;
break;
}
message.obj = transResult;
handler.sendMessage(message);
}
}).start();
}
private String parserJson(String str) {
try {
JSONObject jsonObject = new JSONObject(str);
JSONArray trans_result = jsonObject.getJSONArray("trans_result");
JSONObject result = trans_result.getJSONObject(0);
String dst = result.getString("dst");
return dst;
} catch (JSONException e) {
e.printStackTrace();
}
return "";
}
}
import java.io.BufferedReader;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Map;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
class HttpGet {
protected static final int SOCKET_TIMEOUT = 10000; // 10S
protected static final String GET = "GET";
public static String get(String host, Map<String, String> params) {
try {
// 设置SSLContext
SSLContext sslcontext = SSLContext.getInstance("TLS");
sslcontext.init(null, new TrustManager[] { myX509TrustManager }, null);
String sendUrl = getUrlWithQueryString(host, params);
// System.out.println("URL:" + sendUrl);
URL uri = new URL(sendUrl); // 创建URL对象
HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
if (conn instanceof HttpsURLConnection) {
((HttpsURLConnection) conn).setSSLSocketFactory(sslcontext.getSocketFactory());
}
conn.setConnectTimeout(SOCKET_TIMEOUT); // 设置相应超时
conn.setRequestMethod(GET);
int statusCode = conn.getResponseCode();
if (statusCode != HttpURLConnection.HTTP_OK) {
System.out.println("Http错误码：" + statusCode);
}
// 读取服务器的数据
InputStream is = conn.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
StringBuilder builder = new StringBuilder();
String line = null;
while ((line = br.readLine()) != null) {
builder.append(line);
}
String text = builder.toString();
close(br); // 关闭数据流
close(is); // 关闭数据流
conn.disconnect(); // 断开连接
return text;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (KeyManagementException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return null;
}
public static String getUrlWithQueryString(String url, Map<String, String> params) {
if (params == null) {
return url;
}
StringBuilder builder = new StringBuilder(url);
if (url.contains("?")) {
builder.append("&");
} else {
builder.append("?");
}
int i = 0;
for (String key : params.keySet()) {
String value = params.get(key);
if (value == null) { // 过滤空的key
continue;
}
if (i != 0) {
builder.append('&');
}
builder.append(key);
builder.append('=');
builder.append(encode(value));
i++;
}
return builder.toString();
}
protected static void close(Closeable closeable) {
if (closeable != null) {
try {
closeable.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 对输入的字符串进行URL编码, 即转换为%20这种形式
*
* @param input 原文
* @return URL编码. 如果编码失败, 则返回原文
*/
public static String encode(String input) {
if (input == null) {
return "";
}
try {
return URLEncoder.encode(input, "utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return input;
}
private static TrustManager myX509TrustManager = new X509TrustManager() {
@Override
public X509Certificate[] getAcceptedIssuers() {
return null;
}
@Override
public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
}
@Override
public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
}
};
}
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* MD5编码相关的类
*
* @author wangjingtao
*/
public class MD5 {
// 首先初始化一个字符数组，用来存放每个16进制字符
private static final char[] hexDigits = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',
'e', 'f'};
/**
* 获得一个字符串的MD5值
*
* @param input 输入的字符串
* @return 输入字符串的MD5值
*/
public static String md5(String input) {
if (input == null)
return null;
try {
// 拿到一个MD5转换器（如果想要SHA1参数换成”SHA1”）
MessageDigest messageDigest = MessageDigest.getInstance("MD5");
// 输入的字符串转换成字节数组
byte[] inputByteArray = input.getBytes("utf-8");
// inputByteArray是输入字符串转换得到的字节数组
messageDigest.update(inputByteArray);
// 转换并返回结果，也是字节数组，包含16个元素
byte[] resultByteArray = messageDigest.digest();
// 字符数组转换成字符串返回
return byteArrayToHex(resultByteArray);
} catch (NoSuchAlgorithmException e) {
return null;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}
/**
* 获取文件的MD5值
*
* @param file
* @return
*/
public static String md5(File file) {
try {
if (!file.isFile()) {
System.err.println("文件" + file.getAbsolutePath() + "不存在或者不是文件");
return null;
}
FileInputStream in = new FileInputStream(file);
String result = md5(in);
in.close();
return result;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
public static String md5(InputStream in) {
try {
MessageDigest messagedigest = MessageDigest.getInstance("MD5");
byte[] buffer = new byte[1024];
int read = 0;
while ((read = in.read(buffer)) != -1) {
messagedigest.update(buffer, 0, read);
}
in.close();
String result = byteArrayToHex(messagedigest.digest());
return result;
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
private static String byteArrayToHex(byte[] byteArray) {
// new一个字符数组，这个就是用来组成结果字符串的（解释一下：一个byte是八位二进制，也就是2位十六进制字符（2的8次方等于16的2次方））
char[] resultCharArray = new char[byteArray.length * 2];
// 遍历字节数组，通过位运算（位运算效率高），转换成字符放到字符数组中去
int index = 0;
for (byte b : byteArray) {
resultCharArray[index++] = hexDigits[b >>> 4 & 0xf];
resultCharArray[index++] = hexDigits[b & 0xf];
}
// 字符数组组合成字符串返回
return new String(resultCharArray);
}
}
import java.util.HashMap;
import java.util.Map;
public class TransApi {
private static final String TRANS_API_HOST = "http://api.fanyi.baidu.com/api/trans/vip/translate";
private String appid;
private String securityKey;
public TransApi(String appid, String securityKey) {
this.appid = appid;
this.securityKey = securityKey;
}
public String getTransResult(String query, String from, String to) {
Map<String, String> params = buildParams(query, from, to);
return HttpGet.get(TRANS_API_HOST, params);
}
private Map<String, String> buildParams(String query, String from, String to) {
Map<String, String> params = new HashMap<String, String>();
params.put("q", query);
params.put("from", from);
params.put("to", to);
params.put("appid", appid);
// 随机数
String salt = String.valueOf(System.currentTimeMillis());
params.put("salt", salt);
// 签名
String src = appid + query + salt + securityKey; // 加密前的原文
params.put("sign", MD5.md5(src));
return params;
}
}
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