package com.lxq.webview01;import android.app.Activity;import android.os.Bundle;import android.view.KeyEvent;import android.view.View;import android.view.View.OnClickListener;import android.webkit.WebSettings;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.Button;import android.widget.EditText;public class MainActivity extends Activity {  private EditText et_url;  private Button btn_request;  private WebView wv;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    initView();    initSetting();    initEvent();  }  private void initSetting() {    //webview設置屬性    WebSettings ws=wv.getSettings();    ws.setBuiltInZoomControls(true);    ws.setDefaultZoom(WebSettings.ZoomDensity.FAR);    ws.setJavaScriptEnabled(true);    ws.setSupportZoom(true);    //點擊鏈接繼續在當前browser中響應，而不是新開Android的系統browser中響應該鏈接，必須覆蓋 webview的WebViewClient對象    wv.setWebViewClient(new WebViewClient(){          public boolean shouldOverrideUrlLoading(WebView view, String url) {            view.loadUrl(url);            return true;          }        });    }  //初始化控件  private void initView() {    et_url =(EditText)findViewById(R.id.et_url);        btn_request = (Button)findViewById(R.id.btn_request);        wv= (WebView)findViewById(R.id.wv);     }  //按鍵監聽  public boolean onKeyDown(int keyCode, KeyEvent event) {        if ((keyCode == KeyEvent.KEYCODE_BACK) && wv.canGoBack()) {          wv.goBack();          return true;        }        return super.onKeyDown(keyCode, event);      }   //初始化事件  private void initEvent() {    btn_request.setOnClickListener(new OnClickListener() {      @Override      public void onClick(View v) {        String url=et_url.getText().toString().trim();        wv.loadUrl(url);      }    });  }}

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"  package="com.lxq.webview01"  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.lxq.webview01.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>  </app````ication></manifest>