android webview中html页面点击按钮跳转到activity

package com.sihuaTech.webview; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import android.app.Activity; import android.os.Bundle; import android.view.KeyEvent; import android.webkit.WebView; import android.webkit.WebViewClient; public class MainActivity extends Activity { /** Called when the activity is first created. */ private WebView myWebView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); myWebView = (WebView) findViewById(R.id.myWebView); myWebView.getSettings().setJavaScriptEnabled(true); // 与js交互，JavaScriptinterface 是个接口，与js交互时用到的，这个接口实现了从网页跳到app中的activity 的 // 方法，特别重要 myWebView.addJavascriptInterface(new JavaScriptinterface(this), "android"); // html里的内容，test1就是本地的html,在项目assets文件夹下 String htmlText = getFromAssets("test1.html"); // 将html里的内容加载到webview中 myWebView.loadData(htmlText, "text/html", "utf-8"); myWebView.setWebViewClient(new myWebViewClient()); } // 此按键监听的是返回键，能够返回到上一个网页（通过网页的hostlistery） public boolean onKeyDown(int keyCode, KeyEvent event) { if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) { myWebView.goBack(); return true; } return super.onKeyDown(keyCode, event); } // 获取网页具体内容 public String getFromAssets(String fileName) { try { InputStreamReader inputReader = new InputStreamReader( getResources().getAssets().open(fileName)); BufferedReader bufReader = new BufferedReader(inputReader); String line = ""; String Result = ""; while ((line = bufReader.readLine()) != null) Result += line; if (bufReader != null) bufReader.close(); if (inputReader != null) inputReader.close(); return Result; } catch (Exception e) { e.printStackTrace(); } return null; } class myWebViewClient extends WebViewClient { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { // TODO Auto-generated method stub view.loadUrl(url); return true; } } }