«

用AutoCompleteTextView实现自动提示

时间：2024-3-2 18:20     作者：韩俊     分类： Android

运行图：

步骤：

1,将EditText改成AutoCompleteTextView
2，在values/strings.xml中
<string-array name="str">
<item>abandon</item>
<item>ability</item>
<item>able</item>
<item>abnormal</item>
<item>aboard</item>
<item>about</item>
<item>above</item>
<item>abroad</item>
<item>absence</item>
<item>absent</item>
<item>china</item>
<item>japan</item>
<item>korean</item>
</string-array>
3，在MainActivity中的onCreate方法中加ArrayAdapter aaa=ArrayAdapter.createFromResource(this, R.array.str, android.R.layout.simple_spinner_item);
aaa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
((AutoCompleteTextView) etWord).setAdapter(aaa);

代码：

MainActivity.java

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.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.EditText;
import android.widget.TextView;

import com.example.happydictionary.dao.WordDao;

public class MainActivity extends Activity {

    //private AutoCompleteTextView autotext;
    //private ArrayAdapter<String> arrayAdapter;

    private WordDao wordDao;
    private EditText etWord;
    private TextView tvResult;

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

        initViews();

        //*autotext=(AutoCompleteTextView)findViewById(R.id.tvSearchResult);
        //String [] arr={"aa","aab","aac"};
        //arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,arr);
        //autotext.setAdapter(arrayAdapter);

        ArrayAdapter aaa=ArrayAdapter.createFromResource(this, R.array.str, android.R.layout.simple_spinner_item);  
        aaa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);  
        ((AutoCompleteTextView) etWord).setAdapter(aaa); 
    }

    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);
        }
    }

}
WorldDao.java

package com.example.happydictionary.dao;

import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

import com.example.happydictionary.db.DBHelper;

public class WordDao {
     private DBHelper dbHelper;
     private SQLiteDatabase sqLiteDatabase;
     public WordDao(Context context){
         dbHelper=new DBHelper(context);
     }
     public String getChinese(String english){
         sqLiteDatabase=dbHelper.openDatabase();
         String sql="select chinese from t_words where english=?";
         Cursor cursor=sqLiteDatabase.rawQuery(sql, new String[]{english});
         String chinese="查无该词";
         if(cursor.moveToFirst()){
             chinese=cursor.getString(cursor.getColumnIndex("chinese"));
         }
         return chinese;
     }
}

DBHelper.java

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;
    }
}

World.java

package com.example.happydictionary.entity;

public class Word {
    private String english;
    private String chinese;

    public String getEnglish() {
        return english;
    }

    public void setEnglish(String english) {
        this.english = english;
    }

    public String getChinese() {
        return chinese;
    }

    public void setChinese(String chinese) {
        this.chinese = chinese;
    }

}
DBHelperTest.java

package com.example.happydictionary.test;

import com.example.happydictionary.db.DBHelper;

import android.test.AndroidTestCase;

public class DBHelperTest extends AndroidTestCase {
     public void testCreateDB(){
         DBHelper dbHelper=new DBHelper(getContext());
         dbHelper.openDatabase();
     }
}

activity_main.xml

<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" >

    <AutoCompleteTextView
        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 />
    </AutoCompleteTextView>

    <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>

strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">电子词典</string>
    <string name="action_settings">Settings</string>
    <string name="hello_world">Hello world!</string>
    <string name="searchHint">请输入您要查询的单词</string>
    <string name="serachWord">查询</string>

    <string-array name="str">
        <item>abandon</item>
        <item>ability</item>
        <item>able</item>
        <item>abnormal</item>
        <item>aboard</item>
        <item>about</item>
        <item>above</item>
        <item>abroad</item>
        <item>absence</item>
        <item>absent</item>
        <item>china</item>
        <item>japan</item>
        <item>korean</item>
    </string-array>

</resources>



标签: android

热门推荐

1 Android NDK开发环境配置
2 no resource found that matches the given name &#39;theme.appcompat.light.darkactionbar&#39;. android studio
3 PullScrollView详解（三）——PullScrollView实现
4 Genymation怎样设置联网
5 使用SQLite本地数据库
6 从 Android 本地图库选择多个图片
7 Unity3D研究院之与Android相互传递消息（十九）
8 android笔记：简单的有道词典
9 Activity 的四种启动模式
10 Android基础知识_Activity标准启动模式示例

日历

标签

hbase maven eclipse sybase PostgreSQL spring emcache oracle mongodb redis nginx golang java vue android ios mysql linux 微信小程序 css html php教程 javascript python php

搜索

最新文章

热门文章