调用Android WebView 的例子（实现浏览器功能）

package com.feng.browser.activity; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.view.KeyEvent; import android.view.View; import android.view.View.OnClickListener; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.Button; import android.widget.EditText; public class TestWebBrowserAndroidActivity extends Activity { private Button goButton; private EditText urlET; private WebView showWV; private Button wvButton; private final String mimeType = "text/html"; private final String encoding = "utf-8"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); urlET = (EditText) findViewById(R.id.urlET); goButton = (Button) findViewById(R.id.goButton); showWV = (WebView) findViewById(R.id.showWV); wvButton = (Button) findViewById(R.id.wvButton); showWV.getSettings().setJavaScriptEnabled(true); showWV.requestFocus(); showWV.setWebViewClient(new WebViewClient(){ @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { view.loadUrl(url); return true; } }); goButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Uri uri = Uri.parse("http://" + urlET.getText().toString()); Intent it = new Intent(Intent.ACTION_VIEW, uri); startActivity(it); } }); wvButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //showWV.loadData("http://" + urlET.getText().toString(), mimeType, encoding); showWV.loadUrl("http://" + urlET.getText().toString()); } }); } /** * 处理退出按钮 */ @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if ((keyCode == KeyEvent.KEYCODE_BACK) && showWV.canGoBack()) { showWV.goBack(); return true; }else if(keyCode == KeyEvent.KEYCODE_BACK){ confirmExit();//按了返回键，但已经不能返回，则执行退出确认 return true; } return super.onKeyDown(keyCode, event); } public void confirmExit(){//退出确认 AlertDialog.Builder ad=new AlertDialog.Builder(TestWebBrowserAndroidActivity.this); ad.setTitle("退出"); ad.setMessage("是否退出软件?"); ad.setPositiveButton("是", new DialogInterface.OnClickListener() {//退出按钮 @Override public void onClick(DialogInterface dialog, int i) { // TODO Auto-generated method stub TestWebBrowserAndroidActivity.this.finish();//关闭activity } }); ad.setNegativeButton("否",new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int i) { //不退出不用执行任何操作 } }); ad.show();//显示对话框 } }