Android使用WebView.loadUri()打开网页的方法

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();
  }
    });
  }
}