Android Webview实现有道电子词典

毕业设计android电子词典，先实现的一个小小的demo。

所谓的毕业设计就是用最短的时间学习一门语言，做出一个小的project。

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">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/tvDict"
            android:layout_width="0dp"
            android:layout_height="40dp"
            android:layout_weight="1"
            android:text="@string/tv_dict"
            />
        <Spinner
            android:id="@+id/sp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="2"
            />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:orientation="horizontal" >

        <EditText
            android:id="@+id/etInput"
        	android:layout_width="0dp"
        	android:layout_height="60dp"
        	android:layout_weight="3"
        	android:text=""
        	android:hint=""/>

        <Button
            android:id="@+id/btnSearch"
            android:layout_width="0dp"
        	android:layout_height="60dp"
        	android:layout_weight="1"
        	android:text="@string/btn_search"
            />

        <Button
            android:id="@+id/btnClear"
            android:layout_width="0dp"
        	android:layout_height="60dp"
        	android:layout_weight="1"
        	android:text="@string/btn_clear"
            />

     </LinearLayout>

     <WebView
         android:id="@+id/wvShow"
         android:layout_height="0dp"
         android:layout_width="fill_parent"
         android:layout_weight="4"
         android:focusable="false"
         />

</LinearLayout>

JsonString.java

package com.example.webviewtest;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.URL;

public class JsonString {

	private String json;

	JsonString(){

	}

	public void setStrJson(String json) {
		this.json = json;
	}

	public String getStrJson() {
		return json;
	}

public void setJsonString(String word)throws Exception{

		String urlPath = "http://fanyi.youdao.com/openapi.do?keyfrom=neverland&key=969918857&type=data&doctype=json&version=1.1&q=";
		urlPath += word;
		System.out.println(urlPath);
		URL url = new URL(urlPath);
		HttpURLConnection connection = (HttpURLConnection) url.openConnection();
		connection.connect();
		InputStream inputStream = connection.getInputStream();
		Reader reader = new InputStreamReader(inputStream, "UTF-8");
		BufferedReader bufferedReader = new BufferedReader(reader);
		String str = null;
		StringBuffer stringBuffer = new StringBuffer();
		while((str = bufferedReader.readLine())!= null){
			stringBuffer.append(str);
		}
		reader.close();
		connection.disconnect();
		json = stringBuffer.toString();
	}

}

HtmlString.java

package com.example.webviewtest;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HtmlString {

	private String webString;

	HtmlString(){

	}

	public void setwebString(String webString) {
		this.webString = webString;
	}

	public String getwebString() {
		return webString;
	}

public void setwebString(String word, String dict)throws Exception{

		String urlPath = "http://m.youdao.com/singledict?le=eng&dict=";
		urlPath = urlPath + dict + "&q=" + word;
		//System.out.println(urlPath);
		URL url = new URL(urlPath);
		HttpURLConnection connection = (HttpURLConnection) url.openConnection();
		connection.connect();
		InputStream inputStream = connection.getInputStream();
		Reader reader = new InputStreamReader(inputStream, "UTF-8");
		BufferedReader bufferedReader = new BufferedReader(reader);
		String str = null;
		StringBuffer stringBuffer = new StringBuffer();
		while((str = bufferedReader.readLine())!= null){
			stringBuffer.append(str);
		}
		reader.close();
		connection.disconnect();
		webString = stringBuffer.toString();
	}

}

MainActivity.java

package com.example.webviewtest;

import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;
import android.view.View.OnClickListener;
import android.view.inputmethod.InputMethodManager;
import org.json.JSONObject;
import org.json.JSONArray;

public class MainActivity extends FragmentActivity {

	private Button btnSrarch;
	private Button btnClear;
	private EditText etInput;
	private WebView wvShow;
	InputMethodManager imm;
	private Spinner spinner;
	private String dictName;
	private ArrayAdapter<String> adapter;
	private static final String[] dict = { "基本释义", "柯林斯英汉双解大辞典", "21世纪大英汉词典",
			"英英释义", "专业释义", "网络释义", "同根词", "同近义词", "双语例句", "原声例句", "权威例句", "百科" };

	private static final String[]dicts = {"ec", "collins", "ec21", "ee",
			"special", "web_trans", "rel_word", "syno", "blng_sents_part",
			"media_sents_part", "auth_sents_part", "baike"}; 

	private static final String linkCss = "<link rel=\"stylesheet\" href=\"file:///android_asset/style.css\" type=\"text/css\">";

	private static final String body = "<html><head>" + linkCss + "</head><body class=\"p-dict\" style=\"height: 591px;\">";
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		InitViews();
		setListener();

		// 内部打开连接
		wvShow.setWebViewClient(new WebViewClient() {
			public boolean shouldOverrideUrlLoading(WebView view, String url) {
				view.loadUrl(url);
				return true;
			}
		});

		// 滚动条
		wvShow.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);

	}

	public void Search() {
		selectDict();
		if (dictName == "ec") {         //基本释义使用另外的接口
			String word = etInput.getText().toString().trim();
			StringBuffer buffer = new StringBuffer();
			buffer.append("<html><head><link rel=\"stylesheet\" href=\"file:///android_asset/font.css\" type=\"text/css\"></head><body>");
			JsonString json = new JsonString();
			try {
				json.setJsonString(word);
				JSONObject jsonObject = new JSONObject(json.getStrJson());
				JSONObject basic = jsonObject.getJSONObject("basic");
				buffer.append("<p class=\"us-phonetic\">us-phonetic:" + basic.getString("us-phonetic") + "</p><br>");
				buffer.append("<p class=\"uk-phonetic\">uk-phonetic:" + basic.getString("uk-phonetic") + "</p><br>");
				JSONArray explains = basic.getJSONArray("explains");
				for (int i = 0; i < explains.length(); i++) {
					buffer.append(explains.getString(i) + "<br>");
				}
				buffer.append("</body></html>");
				System.out.println(buffer.toString());
				//wvShow.loadData(buffer.toString(), "text/html", "UTF-8");
				//wvShow.getSettings().setDefaultTextEncodingName("UTF-8");
				wvShow.loadDataWithBaseURL("", buffer.toString(), "text/html", "UTF-8", "");
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		else {
			HtmlString htmlString = new HtmlString();
			String word = etInput.getText().toString().trim();
			try {
				htmlString.setwebString(word, dictName);
				String html = body + "<div id=\"" + dictName + "\" " +
						"class=\"trans-container " + dictName + "\">"
						+htmlString.getwebString() + "</div></body></html>";
				//wvShow.getSettings().setDefaultTextEncodingName("UTF-8");
				wvShow.loadDataWithBaseURL("http://m.youdao.com/",
						html, "text/html", "UTF-8", null);
				System.out.println(html);
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

		// 软键盘开启则关闭，关闭则开启
		imm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
		if (imm.isActive()) {
			imm.toggleSoftInput(InputMethodManager.SHOW_IMPLICIT,
					InputMethodManager.HIDE_NOT_ALWAYS);
		}
	}

	public void InitViews()  //初始化
	{
		btnSrarch = (Button) findViewById(R.id.btnSearch);
		btnClear = (Button) findViewById(R.id.btnClear);
		etInput = (EditText) findViewById(R.id.etInput);
		wvShow = (WebView) findViewById(R.id.wvShow);
		wvShow.getSettings().setDefaultTextEncodingName("UTF-8");
		spinner = (Spinner) findViewById(R.id.sp);
		adapter = new ArrayAdapter<String>(this,
				android.R.layout.simple_spinner_item, dict);
		adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
		spinner.setAdapter(adapter);
		spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
			@Override
			public void onItemSelected(AdapterView<?> parent, View view,
					int position, long id) {
				// TODO Auto-generated method stub
				dictName = adapter.getItem(position);
			}

			@Override
			public void onNothingSelected(AdapterView<?> parent) {
				// TODO Auto-generated method stub
				dictName = dict[0];
			}

		});
	}

	public void setListener()  //设置监听器
	{
		// 键盘监听
		etInput.setOnKeyListener(new OnKeyListener() {

			@Override
			public boolean onKey(View v, int keyCode, KeyEvent event) {
				// TODO Auto-generated method stub
				if (keyCode == KeyEvent.KEYCODE_ENTER) {
					Search();
					wvShow.setFocusable(true);
					wvShow.setFocusableInTouchMode(true);
					wvShow.requestFocus();
				}
				return false;
			}
		});

		// 搜索按钮监听
		btnSrarch.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				String word = etInput.getText().toString();
				word = word.trim();
				if (word.length() == 0) {
					Toast.makeText(MainActivity.this, "查询内容为空",
							Toast.LENGTH_LONG).show();
				} else {
					// String urlString =
					// "http://dict.youdao.com/m/search?keyfrom=dict.mindex&vendor=&q="+
					// word;
					// String urlString = "http://m.youdao.com/dict?le=eng&q="
					// + word;
					// wvShow.loadUrl(urlString);
					Search();
					wvShow.setFocusable(true);
					wvShow.setFocusableInTouchMode(true);
					wvShow.requestFocus();
				}

			}
		});
		// 清除按钮监听
		btnClear.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				etInput.setText("");
			}
		});
	}
	//选择辞典
	public void selectDict() {
		for (int i = 0; i < dict.length; i++) {
			if (dictName == dict[i]) {
				dictName = dicts[i];
				break;
			}
		}
	}
}

效果图

毕设电子词典效果图