Android网络技术之WebView常用方法

public class WebViewTest extends Activity {

 

    private WebView wv;

    private EditText et;

     

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        super.onCreate(savedInstanceState);

        setContentView(R.layout.webview);

        wv = (WebView) findViewById(R.id.webview_wv);

        wv.loadUrl(http://www.baidu.com);

        initWV();

        et = (EditText) findViewById(R.id.webview_et);

        et.setSelection(et.getText().length());

    }

 

    private void initWV() {

        // TODO Auto-generated method stub

        //设置内核，支持ajax

        wv.setWebChromeClient(new WebChromeClient());

        //new WebViewClient()默认基于webkit内核

        wv.setWebViewClient(new WebViewClient(){

            //从一个网页跳到另一个网页的方式,return true则为目标页面在当前webView打开，不会调用系统默认浏览器

            @Override

            public boolean shouldOverrideUrlLoading(WebView view, String url) {

                // TODO Auto-generated method stub

                return true;

            }

            //当页面加载完毕调用的方法

            @Override

            public void onPageFinished(WebView view, String url) {

                // TODO Auto-generated method stub

                Toast.makeText(WebViewTest.this, 加载完毕！, 0).show();

                super.onPageFinished(view, url);

            }

             

            //页面开始加载时调用的方法

            @Override

            public void onPageStarted(WebView view, String url, Bitmap favicon) {

                // TODO Auto-generated method stub

                et.setText(url);

                super.onPageStarted(view, url, favicon);

            }

        });

         

        //设置支持js脚本

        wv.getSettings().setJavaScriptEnabled(true);

        //设置支持手指放大

        wv.getSettings().setSupportZoom(true);

        wv.getSettings().setBuiltInZoomControls(true);

    }

     

    public void load(View view){

        //加载URL

        wv.loadUrl(et.getText().toString().trim());

    }

     

    public void reload(View view){

        //重新载入，刷新页面

        wv.reload();

    }

     

    public void back(View view){

        //后退

        wv.goBack();

    }

     

    //设置（拦截）手机上的按键触摸时间

    @Override

    public boolean onKeyDown(int keyCode, KeyEvent event) {

        // TODO Auto-generated method stub

        switch (keyCode) {

        case KeyEvent.KEYCODE_BACK:

            wv.goBack();

            break;

 

        default:

            break;

        }

        return super.onKeyDown(keyCode, event);

    }

}

 

 

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<!--?xml version=1.0 encoding=utf-8?--> <linearlayout android:layout_height="match_parent" android:layout_width="match_parent" android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android">     </linearlayout>

 

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