android webview 访问网页,在android中举例说明如何用WebView.loadUri();来打开网页

程序如下所示：

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.webkit.WebView;

import android.widget.EditText;

import android.widget.ImageButton;

import android.widget.Toast;

public class A07Activity extends Activity {  private EditText et;//用来输入网址  private ImageButton ib;//用来触发打开网页的事件  private WebView wv;     /** Called when the activity is first created. */     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);         et=(EditText)findViewById(R.id.et);         ib=(ImageButton)findViewById(R.id.ib);         wv=(WebView)findViewById(R.id.wv);         ib.setImageResource(R.drawable.start);//加载ImageButton的按钮图片         ib.setOnClickListener(new OnClickListener(){    @Override    public void onClick(View v) {     // TODO Auto-generated method stub     String s=et.getText().toString();//获得网址     wv.loadUrl(s);//把网址传入     Toast.makeText(A07Activity.this, "百度一下，你就知道", Toast.LENGTH_LONG).show();    }                  });     } }