Android實戰--英文詞典（API+GSON+Volley)

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上一節我們介紹了GSON和Volley，用GSON對返回的數據進行了初步解析，這一節我們更進一步，討論一下如何實現英文詞典。首先把JSON數據的樣式再看一下：

下面創建bean，這些都和上一節一樣：

第一個bean:

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. RetData2 retData;//保證變量名與返回JSON的標簽名一致，注意！！！！！！！！
9. @Override
10. public String toString() {
11. return Status [errNum= + errNum + , errMsg= + errMsg + , retData=
12. + retData + ];
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. }

    第二個bean:

    [java] view plaincopy
    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. + dict_result + ];
    31. }
    32.  
    33.  
    34.  
    35. }

        
        第3個bean：

        [java] view plaincopy
        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;
        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 getSymbols() {
        19. return symbols;
        20. }
        21.  
        22. public void setSymbols(List 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個bean:

             

            [java] view plaincopy
            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;
            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 getParts() {
            23. return parts;
            24. }
            25. public void setParts(List 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. + parts + ];
            32. }
            33.  
            34.  
            35. }

                
                第5個：

                [java] view plaincopy
                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包也和上一節一樣，可以參考上一節，我們主要討論一下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() {
                    							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();// 第二個對象的獲取
                    
                    								System.out.println(from= + retData2.getFrom());
                    								DictResult3 dictResult3;
                    								dictResult3 = retData2.getDictResult();// 第三個對象的獲取
                    								buffer.append(單詞：
                    										+ dictResult3.getWord_name() + 
                    );
                    								System.out.println(word_name=
                    										+ dictResult3.getWord_name());
                    								List symbols4s = dictResult3
                    										.getSymbols();// 第四個是對象數組哦，獲取對象數組
                    								buffer.append(音標
                    										+ symbols4s.get(0).getPh_en() + 
                    );// symbols4s.get(0)用於獲取第一個對象
                    								List parts = symbols4s.get(0).getParts();// 同理，最後一個也是對象數組
                    								for (int i = 0; i < parts.size(); i++) {
                    									buffer.append(part:
                    											+ parts.get(i).getParts()// parts.get(i)獲取對象List中的各個對象
                    											+ 
                    );
                    									buffer.append(詞義：);
                    									for (int j = 0; j < parts.get(i).getMeans().length; j++) {
                    										String[] aStrings = parts.get(i)
                    												.getMeans();
                    										buffer.append(aStrings[j]);
                    									}
                    									buffer.append(
                    );
                    								}
                    
                    								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;
                    	}
                    
                    }

                     

                    運行實例：

                     

                    

                    

                    以上實例只是展示如何使用，有很多Bug有待完善，大家可以自行改善，也可以發揮你的能力，做成一部真正的字典app。