Android的webView 实现点击超链接跳转，后退，前进 ，刷新

public class MainActivity extends Activity {

private WebView webview;
//private EditText url;
private String url="http://www.zhangwenlong.cn/?post=275";

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        webview=(WebView) findViewById(R.id.webview);

        webview.setWebViewClient(new webViewClient());     

    

        Button button=(Button) findViewById(R.id.button);

        button.setOnClickListener(new OnClickListener() {    

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
webview.goBack();//后退  

// webview.goForward();//前进

// webview.reload();  //刷新
}

});

 WebSettings settings=webview.getSettings();

        settings.setBuiltInZoomControls(true); // 显示放大缩小 controler

        settings.setSupportZoom(true); // 可以缩放

webview.loadUrl(url);
webview.setOnKeyListener(new OnKeyListener() {

@Override
public boolean onKey(View arg0, int arg1, KeyEvent arg2) {
// TODO Auto-generated method stub
if(arg2.getAction()==KeyEvent.ACTION_DOWN)
{
if(arg1==KeyEvent.KEYCODE_BACK&&webview.canGoBack())
{
webview.goBack();//后退
return true; 
}
}
return false;
}
});

    }

    

    //点击超练接 跳转

   class webViewClient extends WebViewClient

   {
  @Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// TODO Auto-generated method stub
  view.loadUrl(url);
return true;
}

   }

   

    

}