Android实现webview实例代码

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设置属性    WebSettings ws=wv.getSettings();    ws.setBuiltInZoomControls(true);    ws.setDefaultZoom(WebSettings.ZoomDensity.FAR);    ws.setJavaScriptEnabled(true);    ws.setSupportZoom(true);    //点击链接继续在当前browser中响应，而不是新开Android的系统browser中响应该链接，必须覆盖 webview的WebViewClient对象    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);     }  //按键监听  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);      }    });  }}