Android实战--英文词典（API+GSON+Volley)-CFANZ编程社区

上一节我们介绍了GSON和Volley，用GSON对返回的数据进行了初步解析，这一节我们更进一步，讨论一下如何实现英文词典。首先把JSON数据的样式再看一下：

Android实战--英文词典（API+GSON+Volley)_英文词典

下面创建bean，这些都和上一节一样：

第一个bean:

   [java]
    
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1. package org.lxh.demo;  
2.   
3. import java.util.List;  
4.   
5. public class Status1 {  
6. private int errNum;  
7. private String errMsg;  
8. //保证变量名与返回JSON的标签名一致，注意！！！！！！！！  
9. @Override  
10. public String toString() {  
11. return "Status [errNum=" + errNum + ", errMsg=" + errMsg + ", retData="  
12. "]";  
13.     }  
14. public int getErrNum() {  
15. return errNum;  
16.     }  
17. public void setErrNum(int errNum) {  
18. this.errNum = errNum;  
19.     }  
20. public String getErrMsg() {  
21. return errMsg;  
22.     }  
23. public void setErrMsg(String errMsg) {  
24. this.errMsg = errMsg;  
25.     }  
26. public RetData2 getRetData() {  
27. return retData;  
28.     }  
29. public void setRetData(RetData2 retData) {  
30. this.retData = retData;  
31.     }  
32.       
33.   
34.       
35.       
36.   
37.   
38. }  
第二个bean:

   [java]
    
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1. package org.lxh.demo;  
2.   
3. import java.util.List;  
4.   
5. public class RetData2 {  
6. private String from;  
7. private String to;  
8.     DictResult3 dict_result;  
9. public String getFrom() {  
10. return from;  
11.     }  
12. public void setFrom(String from) {  
13. this.from = from;  
14.     }  
15. public String getTo() {  
16. return to;  
17.     }  
18. public void setTo(String to) {  
19. this.to = to;  
20.     }  
21. public DictResult3 getDictResult() {  
22. return dict_result;  
23.     }  
24. public void setDictResult(DictResult3 dictResult) {  
25. this.dict_result = dictResult;  
26.     }  
27. @Override  
28. public String toString() {  
29. return "RetData [from=" + from + ", to=" + to + ", dictResult="  
30. "]";  
31.     }  
32.       
33.   
34.       
35. }  
第3个bean：

   [java]
    
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1. package org.lxh.demo;  
2.   
3. import java.util.List;  
4.   
5. public class DictResult3 {  
6. private String word_name;  
7.   
8. private List<Symbols> symbols;  
9.   
10. public String getWord_name() {  
11. return word_name;  
12.     }  
13.   
14. public void setWord_name(String word_name) {  
15. this.word_name = word_name;  
16.     }  
17.   
18. public List<Symbols> getSymbols() {  
19. return symbols;  
20.     }  
21.   
22. public void setSymbols(List<Symbols> symbols) {  
23. this.symbols = symbols;  
24.     }  
25.   
26. @Override  
27. public String toString() {  
28. return "DictResult [word_name=" + word_name + ", symbols=" + symbols  
29. "]";  
30.     }  
31.   
32. }  
第4个bean:
 

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1. package org.lxh.demo;  
2.   
3. import java.util.List;  
4.   
5. public class Symbols {  
6. private String ph_am;  
7. private String ph_en;  
8. private List<Parts> parts;  
9.       
10. public String getPh_am() {  
11. return ph_am;  
12.     }  
13. public void setPh_am(String ph_am) {  
14. this.ph_am = ph_am;  
15.     }  
16. public String getPh_en() {  
17. return ph_en;  
18.     }  
19. public void setPh_en(String ph_en) {  
20. this.ph_en = ph_en;  
21.     }  
22. public List<Parts> getParts() {  
23. return parts;  
24.     }  
25. public void setParts(List<Parts> parts) {  
26. this.parts = parts;  
27.     }  
28. @Override  
29. public String toString() {  
30. return "Symbols [ph_am=" + ph_am + ", ph_en=" + ph_en + ", parts="  
31. "]";  
32.     }  
33.       
34.   
35. }  
第5个：

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1. package org.lxh.demo;  
2.   
3. import java.util.Arrays;  
4. import java.util.List;  
5.   
6. public class Parts {  
7. private String part;  
8. public String getParts() {  
9. return part;  
10.     }  
11. public void setParts(String parts) {  
12. this.part = parts;  
13.     }  
14. public String[] getMeans() {  
15. return means;  
16.     }  
17. public void setMeans(String[] means) {  
18. this.means = means;  
19.     }  
20. @Override  
21. public String toString() {  
22. return "Parts [parts=" + part + ", means=" + Arrays.toString(means)  
23. "]";  
24.     }  
25.     String[] means;  
26.       
27.       
28.       
29.   
30. }

所需要的jar包也和上一节一样，可以参考上一节，我们主要讨论一下MainActivity.java程序：

package org.lxh.demo;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import com.google.gson.Gson;

public class MainActivity extends Activity {
  private Button tojson;
  RequestQueue mQueue;
  StringRequest stringRequest;
  Gson gson;
  String str;
  private TextView textView;
  private EditText editText;
  String string = null;

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

    textView = (TextView) findViewById(R.id.text);
    editText = (EditText) findViewById(R.id.edit);
    tojson = (Button) findViewById(R.id.btn);
    gson = new Gson();
    mQueue = Volley.newRequestQueue(MainActivity.this);
    tojson.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {

        string = editText.getText().toString();
        String requestUrl = getRequestUrl(string);
        stringRequest = new StringRequest(requestUrl,
            new Response.Listener<String>() {
              public void onResponse(String response) {

                Log.d("TAG", response);
                System.out.println("response=" + response);
                Status1 status = gson.fromJson(response,
                    Status1.class);
                StringBuffer buffer = new StringBuffer();// 保存所用字符串

                RetData2 retData2 = status.getRetData();// 第二个对象的获取

                System.out.println("from=" + retData2.getFrom());
                DictResult3 dictResult3;
                dictResult3 = retData2.getDictResult();// 第三个对象的获取
                buffer.append("单词："
                    + dictResult3.getWord_name() + "\n");
                System.out.println("word_name="
                    + dictResult3.getWord_name());
                List<Symbols4> symbols4s = dictResult3
                    .getSymbols();// 第四个是对象数组哦，获取对象数组
                buffer.append("音标"
                    + symbols4s.get(0).getPh_en() + "\n");// symbols4s.get(0)用于获取第一个对象
                List<Parts> parts = symbols4s.get(0).getParts();// 同理，最后一个也是对象数组
                for (int i = 0; i < parts.size(); i++) {
                  buffer.append("part:"
                      + parts.get(i).getParts()// parts.get(i)获取对象List中的各个对象
                      + "\n");
                  buffer.append("词义：");
                  for (int j = 0; j < parts.get(i).getMeans().length; j++) {
                    String[] aStrings = parts.get(i)
                        .getMeans();
                    buffer.append(aStrings[j]);
                  }
                  buffer.append("\n");
                }

                textView.setText(buffer);

              }
            }, new Response.ErrorListener() {
              public void onErrorResponse(VolleyError error) {
                Log.e("TAG", error.getMessage(), error);
              }

            });
        mQueue.add(stringRequest);
      }
    });

  }

  private String getRequestUrl(String word) {
    String url = null;
    if (word != null) {
      url = "http://apistore.baidu.com/microservice/dictionary?query="
          + word + "&from=en&to=zh";
    }
    return url;
  }

}