一个简单的中英文翻译词典学习（类似灵格斯）三
????? 在查询之后的详细信息中，我会注意到在UI开发中关于回车键的实现功能以及在listView中展示所有信息的实现，一个查看单个单词信息怎么实现呢？
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实现回车键代码功能在Android中的实现
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/** * 编辑框添加事件 */ wordEdit.setOnKeyListener(new View.OnKeyListener() { @Override public boolean onKey(View v, int keyCode, KeyEvent event) { if (event.getAction() == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_ENTER){ // user input enter queryButton.performClick(); return true; } return false; } });?
在Android中细心童鞋可以发现，Android中可以支持JSON格式的：
/** * 获取查询项的信息 * @param word * @param result * @return * @throws JSONException */private List<SearchItem> getAudioVoiceByJSON(String word, String result)throws JSONException {JSONObject jsonObject = new JSONObject(result);JSONArray jsonArray = jsonObject.getJSONArray("s");if (jsonArray!= null && jsonArray.length() >0){List<SearchItem> rt = new ArrayList<SearchItem>();for(int i=0;i<jsonArray.length(); i++){JSONObject row = jsonArray.getJSONObject(i);String rword = row.getString("g");String e = row.getString("e");rt.add(new SearchItem(rword, e));}if (cache.size() > 100){cache.remove(cache.keySet().iterator().next());}cache.put(word, rt);return rt;}return Collections.emptyList();}?
实现关闭页面的代码如下：
/** * 点击返回按钮的事件 */ backButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { finish(); } });?
?实现界面切换的代码如下：
/** *点击一个页面的记录跳转的方法 */ searchListView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { SearchItem item = searchItemAdapter.getItems().get(arg2); if (item != null){ //设置跳转的信息 DictActivity 当前的页面 ， DetailActivity 单词的详细情况 Intent intent = new Intent(DictActivity.this, DetailActivity.class); //设置辅助的信息 intent.putExtra("word", item.getWord()); //设置激活的界面 startActivity(intent); } } });?
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至于ListView在下一篇Blog中讲解。
(*^__^*) 嘻嘻……
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源代码如下：
package com.easyway.android.xdict;import java.net.URLEncoder;import java.util.ArrayList;import java.util.Collections;import java.util.HashMap;import java.util.List;import java.util.Map;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.app.ProgressDialog;import android.content.DialogInterface;import android.content.Intent;import android.content.DialogInterface.OnClickListener;import android.os.Bundle;import android.util.Log;import android.view.KeyEvent;import android.view.View;import android.widget.AdapterView;import android.widget.Button;import android.widget.EditText;import android.widget.ListView;import android.widget.AdapterView.OnItemClickListener;/** * 字典首界面 * @author longgangbai * @date 2010-5-28 * @version 1.0 * @since JDK6.0 */public class DictActivity extends Activity { /** Called when the activity is first created. */ /* (non-Javadoc) * @see android.app.Activity#onCreate(android.os.Bundle) */private ProgressDialog pdialog;private SearchItemAdapter searchItemAdapter;private static final int DIALOG_WORD_REQUIRED = 0;private EditText wordEdit;private Button queryButton;private ListView searchListView;private static Map<String, List<SearchItem>> cache = new HashMap<String, List<SearchItem>>();/** * 界面启动时使用弹出框 */@Overrideprotected Dialog onCreateDialog(int id) {switch (id) {case DIALOG_WORD_REQUIRED:AlertDialog.Builder builder = new AlertDialog.Builder(DictActivity.this);builder.setMessage("请输入你想查询的单词！").setCancelable(false).setPositiveButton("确定", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.cancel();//设置焦点wordEdit.setFocusable(true);}});try {return builder.create();} catch (Exception e) {Log.e(DictActivity.class.getName(), e.getMessage(), e);}break;default:return super.onCreateDialog(id);}return super.onCreateDialog(id);}/** * 调用时启动线程 */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //设置视图 setContentView(R.layout.main); //设置标题 setTitle("XDict"); //创建组件 createComponent(); //绑定事件 bindListener(); } /** * 创建组件 */ public void createComponent(){ List<SearchItem> items = new ArrayList<SearchItem>(); //创建自定义的ArrayAapter的适配器对象 searchItemAdapter = new SearchItemAdapter(this, R.layout.row, items); //获取ListView对象 searchListView = (ListView) findViewById(R.id.search_listview); //设置适配器对象 searchListView.setAdapter(searchItemAdapter); queryButton = (Button) findViewById(R.id.query_button); wordEdit = (EditText) findViewById(R.id.word_edittext); } /** * 绑定事件 */ public void bindListener(){ /** * 编辑框添加事件 */ wordEdit.setOnKeyListener(new View.OnKeyListener() { @Override public boolean onKey(View v, int keyCode, KeyEvent event) { if (event.getAction() == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_ENTER){ // user input enter queryButton.performClick(); return true; } return false; } }); /** * 查询按钮添加事件 */ queryButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { searchItemAdapter.getItems().clear(); searchItemAdapter.notifyDataSetChanged(); String word = wordEdit.getText().toString(); if (word == null || word.trim().length() == 0){ showDialog(DIALOG_WORD_REQUIRED); return ; } //添加进度条 pdialog = ProgressDialog.show(DictActivity.this, "请稍等...", "正在请求数据...", true); //添加线程的 new Thread(){ @Override public void run() { final List<SearchItem> searchItems = getSearchItems(wordEdit.getText().toString()); searchItemAdapter.getItems().addAll(searchItems); //采用UI线程更改界面信息 runOnUiThread(new Runnable() { @Override public void run() { searchItemAdapter.notifyDataSetChanged(); View noresultTextview = findViewById(R.id.nosearchresult_textview); if (searchItems.isEmpty()){ noresultTextview.setVisibility(View.VISIBLE); queryButton.setFocusable(true); }else{ noresultTextview.setVisibility(View.INVISIBLE); } //进度条消失 pdialog.dismiss(); } }); } }.start(); } }); /** *点击一个页面的记录跳转的方法 */ searchListView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { SearchItem item = searchItemAdapter.getItems().get(arg2); if (item != null){ //设置跳转的信息 DictActivity 当前的页面 ， DetailActivity 单词的详细情况 Intent intent = new Intent(DictActivity.this, DetailActivity.class); //设置辅助的信息 intent.putExtra("word", item.getWord()); //设置激活的界面 startActivity(intent); } } }); } /** * 设置查询参数 * @return */ public Map<String,String> getDicAppParamsMap(){ Map<String,String> paramsMap=new HashMap<String,String>();paramsMap.put("User-Agent", "Mozilla/5.0 (X11; U; Linux i686; zh-CN; rv:1.9.1.6) Gecko/20091215 Ubuntu/9.10 (karmic) Firefox/3.5.6");paramsMap.put("Referer", "http://dict.cn/");paramsMap.put("ISAJAX", "yes");paramsMap.put("Cookie", "dictid=u; __utma=7761447.596616007.1262230974.1262230974.1262321903.2; __utmz=7761447.1262230974.1.1.utmccn=(direct)|utmcsr=(direct)|utmcmd=(none); h=%2Ffuck%2Fmy%2F%B0%B2%C8%AB%BC%EC%B2%E9%2F%CE%D2%B5%C4%2F%CD%AC%D2%E5%B4%CA%2Fshitwork%2Ffuckhead%2F; __utmc=7761447; __utmb=7761447");paramsMap.put("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");return paramsMap; } /** * 查询相关建议的页面 * @param word * @return */ private List<SearchItem> getSearchItems(String word){ List<SearchItem> cacheData = cache.get(word); if (cacheData != null){ return cacheData; } try{ String urlString = "http://dict.cn/ajax/suggestion.php?"+"q=" + URLEncoder.encode(word,"utf-8") + "&s=all"; Map<String,String> paramsMap=getDicAppParamsMap();String result=HTTPClient.executeByHttpURLConnection(urlString, paramsMap); if (result!=null&&result.length()>0){ return getAudioVoiceByJSON(word, result);}} catch (Exception e) {Log.d(DictActivity.class.getName(), "Failed to get the search items", e);}return Collections.emptyList(); } /** * 获取查询项的信息 * @param word * @param result * @return * @throws JSONException */private List<SearchItem> getAudioVoiceByJSON(String word, String result)throws JSONException {JSONObject jsonObject = new JSONObject(result);JSONArray jsonArray = jsonObject.getJSONArray("s");if (jsonArray!= null && jsonArray.length() >0){List<SearchItem> rt = new ArrayList<SearchItem>();for(int i=0;i<jsonArray.length(); i++){JSONObject row = jsonArray.getJSONObject(i);String rword = row.getString("g");String e = row.getString("e");rt.add(new SearchItem(rword, e));}if (cache.size() > 100){cache.remove(cache.keySet().iterator().next());}cache.put(word, rt);return rt;}return Collections.emptyList();}}?