Android笔记（五十三） 利用有道OPENAPI做简单的翻译demo

　　先去 http://fanyi.youdao.com/openapi?path=data-mode 申请开发者key

　　有道api会自动将申请的单词翻译并返回为xml或者json格式，我们所需要做的就是将返回的格式显示到屏幕上即可

MainActivity.java

package cn.lixyz.youdaodictionary;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {

    private EditText word;
    private Button submit;
    private TextView translation;

    private String str = "http://fanyi.youdao.com/openapi.do?keyfrom=AndroidHttpTest&key=507293865&type=data&doctype=json&version=1.1&q=";
    String requestStr;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initView();

        submit.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                String tmpWord = word.getText().toString().trim();
                requestStr = str + tmpWord;
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        URL url;
                        try {
                            url = new URL(requestStr);
                            URLConnection connection = url.openConnection();
                            InputStream is = connection.getInputStream();
                            InputStreamReader isr = new InputStreamReader(is, "UTF-8");
                            BufferedReader br = new BufferedReader(isr);
                            String tmpLine = "";
                            String line = null;
                            while ((line = br.readLine()) != null) {
                                tmpLine = tmpLine + line;
                            }
                            Message msg = new Message();
                            msg.obj = tmpLine;
                            handler.sendMessage(msg);

                        } catch (MalformedURLException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }
                }).start();
            }
        });
    }

    private void initView() {
        word = (EditText) findViewById(R.id.word);
        submit = (Button) findViewById(R.id.submit);
        translation = (TextView) findViewById(R.id.translation);
    }

    Handler handler = new Handler() {
        public void handleMessage(android.os.Message msg) {
            // translation.setText(msg.obj.toString());

            try {
                JSONObject object = new JSONObject(msg.obj.toString());
                JSONObject jsonobject = object.getJSONObject("basic");
                String usPhonetic = jsonobject.getString("us-phonetic");
                String phonetic = jsonobject.getString("phonetic");
                String ukPhonetic = jsonobject.getString("uk-phonetic");
                JSONArray array = jsonobject.getJSONArray("explains");
                String showText = "";
                for (int i = 0; i < array.length(); i++) {
                    String obj = array.getString(i);
                    showText = showText + obj + "\n";
                }
                showText = "美音:\t" + usPhonetic + "\n" + "英音:\t" + ukPhonetic + "\n" + "\n\n" + showText;

                translation.setText(showText);
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        };
    };

}

activity_main.xml

<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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="cn.lixyz.youdaodictionary.MainActivity" >

    <EditText
        android:id="@+id/word"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp" />

    <Button
        android:id="@+id/submit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:text="翻译" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:text="翻译为：" />

    <TextView
        android:id="@+id/translation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp" />

</LinearLayout>

　　因为要请求网络连接，所以需要加上INTENET权限

<uses-permission android:name="android.permission.INTERNET"/>