package com.example.helloworld; import android.os.Bundle;import android.app.Activity;import android.content.Intent;import android.view.Menu;import android.webkit.WebView; public class MainActivity extends Activity {    private WebView webView = null;      @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                 webView = (WebView)this.findViewById(R.id.webView);          //设置字符集编码          webView.getSettings().setDefaultTextEncodingName("UTF-8");          //开启JavaScript支持          webView.getSettings().setJavaScriptEnabled(true);          webView.addJavascriptInterface(this, "myObject");          //加载网页文件          String url = "http://*****/test.html";          webView.loadUrl(url);      }         public void changeActivity() {        Intent intent = new Intent();        intent.setClass(MainActivity.this, ForwardTarget.class);        startActivity(intent);    }     @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    } }

<input type="button" value="跳转Activity" onclick="window.myObject.changeActivity();" />