通过android系统的WebView控件访问web应用

主程序入口

 1 public class GwpActivity extends Activity {
 2 
 3     private WebView webView;
 4 
 5     @Override
 6     public void onCreate(Bundle savedInstanceState) {
 7         super.onCreate(savedInstanceState);
 8         setContentView(R.layout.main);
 9         init();
10     }
11 
12     public void init() {
13         webView = (WebView) findViewById(R.id.gwkview);
14         webView.getSettings().setJavaScriptEnabled(true);
15         webView.setWebViewClient(new GwkWebViewClient());
16 
17         InputStream in = getResources().openRawResource(R.raw.gwkinfo);  // 读取res/raw/gwkinfo属性文件内容
18         Properties p = new Properties();
19         try {
20             p.load(in);
21             webView.loadUrl(p.getProperty("domain_url", "http://xxxx.com"));
22         } catch (Exception e) {
23             webView.loadUrl("http://xxxx.com");
24         } finally {
25             try {
26                 in.close();
27             } catch (IOException e) {
28             }
29         }
30     }
31 
32     @Override
33     public boolean onKeyDown(int keyCode, KeyEvent event) {
34         if(webView.canGoBack() && keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
35             webView.goBack();
36             return true;
37         }
38         return super.onKeyDown(keyCode, event);
39     }
40 
41     @Override
42     protected void onDestroy() {
43         super.onDestroy();
44         System.exit(0);
45     }
46 }

自定义WebView

public class GwkWebViewClient extends WebViewClient {

    /*
     * 需要区分点击来源, 所以在请求地址上加了个参数用来标识点击是从手机上来的.
     */
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        int position = url.indexOf("?");

        if (position == -1) {
            url = url + "?type=app";
        } else {
            url = url + "&type=app";
        }

        view.loadUrl(url);
        return true;
    }

    /**
     *
     * 当接收出错的时候, 显示自定义的错误页面.
     */
    @Override
    public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
        view.loadUrl("file:///android_asset/error.html");  // 加载assets/error.html页面
    }

}