调用有道词典查询



[java] view plain copy print ?

1. package com.example.happydictionary;  
2.   
3. import android.app.Activity;  
4. import android.os.Bundle;  
5. import android.text.TextUtils;  
6. import android.view.Menu;  
7. import android.view.View;  
8. import android.widget.EditText;  
9. import android.widget.TextView;  
10.   
11. import com.example.happydictionary.dao.WordDao;  
12.   
13. public class MainActivity extends Activity {  
14.     private WordDao wordDao;  
15.     private EditText etWord;  
16.     private TextView tvResult;  
17.   
18.     @Override  
19.     protected void onCreate(Bundle savedInstanceState) {  
20.         super.onCreate(savedInstanceState);  
21.         setContentView(R.layout.activity_main);  
22.   
23.         initViews();  
24.     }  
25.   
26.     private void initViews() {  
27.         etWord = (EditText) findViewById(R.id.etWord);  
28.         tvResult = (TextView) findViewById(R.id.tvSearchResult);  
29.     }  
30.   
31.     @Override  
32.     public boolean onCreateOptionsMenu(Menu menu) {  
33.         // Inflate the menu; this adds items to the action bar if it is present.  
34.         getMenuInflater().inflate(R.menu.main, menu);  
35.         return true;  
36.     }  
37.   
38.     public void searchWord(View view) {  
39.         String english = etWord.getText().toString();  
40.         wordDao = new WordDao(this);  
41.         if (TextUtils.isEmpty(english)) {  
42.             tvResult.setText("请输入您想查询的单词");  
43.         } else {  
44.             String chinese = wordDao.getChinese(english);  
45.             tvResult.setText(chinese);  
46.         }  
47.     }  
48.   
49. }  

package com.example.happydictionary;

import android.app.Activity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

import com.example.happydictionary.dao.WordDao;

public class MainActivity extends Activity {
	private WordDao wordDao;
	private EditText etWord;
	private TextView tvResult;

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

		initViews();
	}

	private void initViews() {
		etWord = (EditText) findViewById(R.id.etWord);
		tvResult = (TextView) findViewById(R.id.tvSearchResult);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	public void searchWord(View view) {
		String english = etWord.getText().toString();
		wordDao = new WordDao(this);
		if (TextUtils.isEmpty(english)) {
			tvResult.setText("请输入您想查询的单词");
		} else {
			String chinese = wordDao.getChinese(english);
			tvResult.setText(chinese);
		}
	}

}

二   activity_main.xml

[java] view plain copy print ?

1. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
2.     xmlns:tools="http://schemas.android.com/tools"  
3.     android:layout_width="match_parent"  
4.     android:layout_height="match_parent"  
5.     android:background="@drawable/mainbg"  
6.     android:paddingBottom="@dimen/activity_vertical_margin"  
7.     android:paddingLeft="@dimen/activity_horizontal_margin"  
8.     android:paddingRight="@dimen/activity_horizontal_margin"  
9.     android:paddingTop="@dimen/activity_vertical_margin"  
10.     tools:context=".MainActivity" >  
11.   
12.     <EditText  
13.         android:id="@+id/etWord"  
14.         android:layout_width="wrap_content"  
15.         android:layout_height="wrap_content"  
16.         android:layout_alignParentLeft="true"  
17.         android:layout_alignParentTop="true"  
18.         android:layout_marginTop="31dp"  
19.         android:background="@android:drawable/edit_text"  
20.         android:ems="10"  
21.         android:hint="@string/searchHint"  
22.         android:singleLine="true"  
23.         android:textColor="#552006"  
24.         android:textColorHint="#782f10" >  
25.   
26.         <requestFocus />  
27.     </EditText>  
28.   
29.     <Button  
30.         android:id="@+id/btnSearch"  
31.         android:layout_width="wrap_content"  
32.         android:layout_height="wrap_content"  
33.         android:layout_alignBaseline="@+id/etWord"  
34.         android:layout_alignBottom="@+id/etWord"  
35.         android:layout_marginLeft="16dp"  
36.         android:layout_toRightOf="@+id/etWord"  
37.         android:background="@drawable/ibsearchword"  
38.         android:onClick="searchWord"  
39.         android:text="@string/serachWord" />  
40.   
41.     <TextView  
42.         android:id="@+id/tvSearchResult"  
43.         android:layout_width="match_parent"  
44.         android:layout_height="match_parent"  
45.         android:layout_alignLeft="@+id/etWord"  
46.         android:layout_below="@+id/etWord"  
47.         android:layout_marginTop="22dp"  
48.         android:textSize="25sp"  
49.         android:background="@drawable/bg_roundcorner"  
50.         android:textAppearance="?android:attr/textAppearanceMedium" />  
51.   
52. </RelativeLayout>  

<RelativeLayout 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:background="@drawable/mainbg"
    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=".MainActivity" >

    <EditText
        android:id="@+id/etWord"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="31dp"
        android:background="@android:drawable/edit_text"
        android:ems="10"
        android:hint="@string/searchHint"
        android:singleLine="true"
        android:textColor="#552006"
        android:textColorHint="#782f10" >

        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/btnSearch"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/etWord"
        android:layout_alignBottom="@+id/etWord"
        android:layout_marginLeft="16dp"
        android:layout_toRightOf="@+id/etWord"
        android:background="@drawable/ibsearchword"
        android:onClick="searchWord"
        android:text="@string/serachWord" />

    <TextView
        android:id="@+id/tvSearchResult"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignLeft="@+id/etWord"
        android:layout_below="@+id/etWord"
        android:layout_marginTop="22dp"
        android:textSize="25sp"
        android:background="@drawable/bg_roundcorner"
        android:textAppearance="?android:attr/textAppearanceMedium" />

</RelativeLayout>

   

[java] view plain copy print ?

1. 三 DBHelper 类  

 三 DBHelper 类

[java] view plain copy print ?

1. package com.example.happydictionary.db;  
2.   
3. import java.io.File;  
4. import java.io.FileNotFoundException;  
5. import java.io.FileOutputStream;  
6. import java.io.IOException;  
7. import java.io.InputStream;  
8.   
9. import com.example.happydictionary.R;  
10. import com.example.happydictionary.R.raw;  
11.   
12. import android.content.Context;  
13. import android.database.sqlite.SQLiteDatabase;  
14. import android.os.Environment;  
15. import android.util.Log;  
16.   
17. /** 
18.  * 实现将数据库文件从raw目录拷贝到手机里存放数据库的位置 
19.  *  
20.  * @author cabbage 
21.  */  
22. public class DBHelper {  
23.     private final int BUFFER_SIZE = 400000;  
24.     public static final String DB_NAME = "idiom.db"; // 保存的数据库文件名  
25.     public static final String PACKAGE_NAME = "com.example.happydictionary";// 应用的包名  
26.     public static final String DB_PATH = "/data"  
27.             + Environment.getDataDirectory().getAbsolutePath() + "/"  
28.             + PACKAGE_NAME + "/databases";  
29.     /*// SDCard 定义数据库的存放路径 
30.     private final String DATABASE_PATH = android.os.Environment 
31.             .getExternalStorageDirectory().getAbsolutePath() + "/dictionary";*/  
32.   
33.     private Context context;  
34.   
35.     public DBHelper(Context context) {  
36.         this.context = context;  
37.     }  
38.   
39.     public SQLiteDatabase openDatabase() {  
40.         try {  
41.             File myDataPath = new File(DB_PATH);  
42.             if (!myDataPath.exists()) {  
43.                 myDataPath.mkdirs();// 如果没有这个目录则创建  
44.             }  
45.             String dbfile = myDataPath + "/" + DB_NAME;  
46.             if (!(new File(dbfile).exists())) {// 判断数据库文件是否存在，若不存在则执行导入，否则直接打开数据库  
47.                 InputStream is = context.getResources().openRawResource(  
48.                         R.raw.dictionary); // 欲导入的数据库  
49.                 FileOutputStream fos = new FileOutputStream(dbfile);  
50.                 byte[] buffer = new byte[BUFFER_SIZE];  
51.                 int count = 0;  
52.                 while ((count = is.read(buffer)) > 0) {  
53.                     fos.write(buffer, 0, count);  
54.                 }  
55.                 fos.close();  
56.                 is.close();  
57.             }  
58.             SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(dbfile,  
59.                     null);  
60.             return db;  
61.         } catch (FileNotFoundException e) {  
62.             Log.e("Database", "File not found");  
63.             e.printStackTrace();  
64.         } catch (IOException e) {  
65.             Log.e("Database", "IO exception");  
66.             e.printStackTrace();  
67.         }  
68.         return null;  
69.     }  
70. }  

package com.example.happydictionary.db;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import com.example.happydictionary.R;
import com.example.happydictionary.R.raw;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.os.Environment;
import android.util.Log;

/**
 * 实现将数据库文件从raw目录拷贝到手机里存放数据库的位置
 * 
 * @author cabbage
 */
public class DBHelper {
	private final int BUFFER_SIZE = 400000;
	public static final String DB_NAME = "idiom.db"; // 保存的数据库文件名
	public static final String PACKAGE_NAME = "com.example.happydictionary";// 应用的包名
	public static final String DB_PATH = "/data"
			+ Environment.getDataDirectory().getAbsolutePath() + "/"
			+ PACKAGE_NAME + "/databases";
	/*// SDCard 定义数据库的存放路径
	private final String DATABASE_PATH = android.os.Environment
			.getExternalStorageDirectory().getAbsolutePath() + "/dictionary";*/

	private Context context;

	public DBHelper(Context context) {
		this.context = context;
	}

	public SQLiteDatabase openDatabase() {
		try {
			File myDataPath = new File(DB_PATH);
			if (!myDataPath.exists()) {
				myDataPath.mkdirs();// 如果没有这个目录则创建
			}
			String dbfile = myDataPath + "/" + DB_NAME;
			if (!(new File(dbfile).exists())) {// 判断数据库文件是否存在，若不存在则执行导入，否则直接打开数据库
				InputStream is = context.getResources().openRawResource(
						R.raw.dictionary); // 欲导入的数据库
				FileOutputStream fos = new FileOutputStream(dbfile);
				byte[] buffer = new byte[BUFFER_SIZE];
				int count = 0;
				while ((count = is.read(buffer)) > 0) {
					fos.write(buffer, 0, count);
				}
				fos.close();
				is.close();
			}
			SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(dbfile,
					null);
			return db;
		} catch (FileNotFoundException e) {
			Log.e("Database", "File not found");
			e.printStackTrace();
		} catch (IOException e) {
			Log.e("Database", "IO exception");
			e.printStackTrace();
		}
		return null;
	}
}