Android实例之有道词典

运行效果图展示：

布局文件activity_main.xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/RelativeLayout1"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    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/edit_text"        android:layout_width="fill_parent"       android:layout_height="wrap_content"      android:maxLength="30"      android:hint="输入你要查询的内容"/><Button    android:id="@+id/button1"    style="?android:attr/buttonStyleSmall"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_alignRight="@+id/edit_text"    android:layout_below="@+id/edit_text"    android:text="查询" /><WebView    android:id="@+id/wvSearchResult"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:layout_below="@+id/button1"    android:layout_centerHorizontal="true"    android:layout_marginTop="15dp"    android:textAppearance="?android:attr/textAppearanceMedium"    android:textSize="22sp" /></RelativeLayout>

MainActivity.java文件代码展示：

package com.example.dictonion;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.webkit.WebView;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends Activity {    private Button myButton01;    private EditText mEditText1;    private WebView mWebView1;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        myButton01 = (Button)findViewById(R.id.button1);        mEditText1 = (EditText) findViewById(R.id.edit_text);        mWebView1 = (WebView) findViewById(R.id.wvSearchResult);        myButton01.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                // TODO Auto-generated method stub                String strURI = (mEditText1.getText().toString());                strURI = strURI.trim();                if (strURI.length() == 0)                    {                    Toast.makeText(MainActivity.this, "查询内容不能为空!", Toast.LENGTH_LONG)                    .show();                    }                else                    {                    String strURL = "http://dict.youdao.com/m/search?keyfrom=dict.mindex&q="                    + strURI;                    mWebView1.loadUrl(strURL);                     }            }        });    }    @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;    }}

项目权限:

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.dictonion"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="17" />    <uses-permission android:name="android.permission.INTERNET"/>    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="com.example.dictonion.MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

运行结果：