使用android内置浏览器打开网页

<pre name="code" class="java">package com.example.exp14_10_1;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.os.Bundle;import android.text.Editable;import android.text.method.KeyListener;import android.util.Log;import android.view.KeyEvent;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnKeyListener;import android.webkit.WebChromeClient;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.Button;import android.widget.CheckBox;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends Activity {private WebView wv;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);wv = (WebView) findViewById(R.id.webView1);wv.getSettings().setJavaScriptEnabled(true);wv.setWebChromeClient(new WebChromeClient());        wv.setWebViewClient(new WebViewClient());       // wv.setWebViewClient(new WebViewClient());////如果不适用该句代码将使用内置浏览器Button back = (Button) findViewById(R.id.back);Button forward = (Button) findViewById(R.id.forward);Button GO = (Button) findViewById(R.id.go);final EditText urlText = (EditText) findViewById(R.id.editTextUrl);back.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubwv.goBack();}});forward.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubwv.goForward();}});GO.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stub String urlStr = urlText.getText().toString();if (!"".equals(urlStr)) {openBrowser(urlStr);} else {openBrowser(urlStr);showDialog();}}});urlText.setOnKeyListener(new OnKeyListener() {public boolean onKey(View v, int keyCode, KeyEvent event) {// TODO Auto-generated method stubif (keyCode == KeyEvent.KEYCODE_ENTER) { String urlStr2 = urlText.getText().toString();if (!"".equals(urlStr2)) {openBrowser(urlStr2);                       return true;///不让文本框换行} else {openBrowser(urlStr2);showDialog();return true;//不让文本框换行，但showDialog显示了两次，为何呢？？}}///return true;////这会导致文本内容无法删除，删除没反应return false;}});}// /onCreateprivate void openBrowser(String url) {Toast.makeText(MainActivity.this, "正在加载" + url, Toast.LENGTH_SHORT).show();wv.loadUrl(url);}private void showDialog() {new AlertDialog.Builder(MainActivity.this).setTitle("浏览器").setMessage("请输入网址!").setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubLog.d("webview", "单击确定按钮");};}).show();// //new DialogInterface.OnClickListener()}// /showDialog}

<pre name="code" class="html"><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <EditText        android:id="@+id/editText1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="http://192.168.1.105:8080/bbs"        android:ems="10" >        <requestFocus />    </EditText>    <Button        android:id="@+id/button1"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="Go" />    <WebView        android:id="@+id/webView1"        android:layout_width="match_parent"        android:layout_height="match_parent" /></LinearLayout>