android：使用webview加载网页

android使用webview加载网页

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 package com.example.webview; import android.os.Bundle; import android.annotation.SuppressLint; import android.app.Activity; import android.view.KeyEvent; import android.view.Menu; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebViewClient; public class MainActivity extends Activity { private WebView webview; @SuppressLint( "SetJavaScriptEnabled" ) @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); webview = (WebView) findViewById(R.id.webview); WebSettings webSettings = webview.getSettings(); //设置WebView属性，能够执行Javascript脚本 webSettings.setJavaScriptEnabled( true ); //设置可以访问文件 webSettings.setAllowFileAccess( true ); //设置支持缩放 webSettings.setBuiltInZoomControls( true ); //加载需要显示的网页 webview.loadUrl( " http: //www.baidu.com"" target="_blank">http://www.baidu.com"); //设置Web视图 webview.setWebViewClient( new webViewClient ()); } @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 ; } @Override //设置回退 //覆盖Activity类的onKeyDown(int keyCoder,KeyEvent event)方法 public boolean onKeyDown( int keyCode, KeyEvent event) { if ((keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) { webview.goBack(); //goBack()表示返回WebView的上一页面 return true ; } finish(); //结束退出程序 return false ; } //Web视图 private class webViewClient extends WebViewClient { public boolean shouldOverrideUrlLoading(WebView view, String url) { view.loadUrl(url); return true ; } } }

xml代码

1 2 3 4 5 6 7 8 9 10 11 12 <?xml version= "1.0" encoding= "utf-8" ?> " http: //schemas.android.com/apk/res/android" " target="_blank">http://schemas.android.com/apk/res/android" android:orientation= "vertical" android:layout_width= "fill_parent" android:layout_height= "fill_parent" > android:id= "@+id/webview" android:layout_width= "fill_parent" android:layout_height= "fill_parent" />

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