Android WebView加載HTML表單並通過javascript提交（一）

使用android的WebView控件加載HTML表單，通過javascript調用java對像提交表單，在java對像中獲取表單的值：

1. import android.app.Activity;
   
2. import android.app.AlertDialog;
   
3. import android.content.DialogInterface;
   
4. import android.os.Bundle;
   
5. import android.os.Handler;
   
6. import android.view.View;
   
7. import android.webkit.JsResult;
   
8. import android.webkit.WebChromeClient;
   
9. import android.webkit.WebSettings;
   
10. import android.webkit.WebView;
    
11. import android.widget.Button;
    
12. import android.widget.TextView;
    
13. 
    
14. public class WebViewTest extends Activity {
    
15. private WebView mWebView = null;
    
16. private TextView txtView = null;
    
17. private Handler mHandler = new Handler();
    
18. /** Called when the activity is first created. */
    
19. 
    
20. @Override
    
21. public void onCreate(Bundle savedInstanceState) {
    
22. super.onCreate(savedInstanceState);
    
23. setContentView(R.layout.main);
    
24. mWebView = (WebView) findViewById(R.id.webView);
    
25. txtView = (TextView) findViewById(R.id.webViewResult);
    
26. WebSettings webSettings = mWebView.getSettings();
    
27. //不保存密碼
    
28. webSettings.setSavePassword(false);
    
29. //不保存表單數據
    
30. webSettings.setSaveFormData(false);
    
31. webSettings.setJavaScriptEnabled(true);
    
32. //不支持頁面放大功能
    
33. webSettings.setSupportZoom(false);
    
34. mWebView.addJavascriptInterface(new LoginJavaScriptImpl(), "loginImpl"); mWebView.setWebChromeClient(new MyAndroidWebClient());
    
35. 
    
36. ((Button)findViewById(R.id.btnLoadhtml)).setOnClickListener(new View.OnClickListener() {
    
37. public void onClick(View arg0) {
    
38. mWebView.loadData(createWebForm(), "text/html", "UTF-8");
    
39. // mWebView.loadDataWithBaseURL("", createWebForm(), "text/html", "UTF-8", "");
    
40. }
    
41. });
    
42. }
    
43. 
    
44. private String returnValue;
    
45. protected final class LoginJavaScriptImpl {
    
46. public void login(String username, String password){
    
47. returnValue = username + ": " + password; mHandler.post(new Runnable() {
    
48. public void run() { txtView.setText(returnValue);
    
49. }
    
50. });
    
51. }
    
52. }
    
53. 
    
54. private final class MyAndroidWebClient extends WebChromeClient {
    
55. 
    
56. @Override
    
57. public boolean onJsAlert(WebView view,String url, String message, JsResult result) {

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