Android WebView加载HTML表单并通过javascript提交

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http://www.eoeandroid.com/thread-90393-1-1.html

使用android的WebView控件加载HTML表单，通过javascript调用java对象提交表单，在java对象中获取表单的值：

java代码：

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. //不保存密码
    
28. webSettings.setSavePassword(false);
    
29. //不保存表单数据
    
30. webSettings.setSaveFormData(false);
    
31. webSettings.setJavaScriptEnabled(true);
    
32. //不支持页面放大功能
    
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) {
    
58. 
    

java代码：

1. 
   
2. new AlertDialog.Builder(WebViewTest.this) .setTitle("提示信息") .setMessage(message) .setPositiveButton("确定", new DialogInterface.OnClickListener() {
   
3. public void onClick( DialogInterface dialoginterface, int i) { } }).show();
   
4. return true;
   
5. }
   
6. }
   
7. private String createWebForm(){ StringBuffer sb = new StringBuffer();
   
8. sb.append("< html>").append("< head>");
   
9. sb.append("< meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"/>"); sb.append("< title>").append("表单测试").append("< /title>");
   
10. sb.append("< /head>< script language=\"javascript\">");
    
11. sb.append("function checkform(){var username=document.loginForm.username.value;"); sb.append("var password=document.loginForm.password.value;");
    
12. sb.append("if(username==\"\"){alert(\"用户名不能为空!\");
    
13. return false
    
14. ;}");
    
15. sb.append("if(password==\"\"){alert(\"密码不能为空!\");
    
16. return false;}");
    
17. //sb.append("return username + \":\" + password;");
    
18. sb.append("window.loginImpl.login(username, password)");
    
19. sb.append("}");
    
20. sb.append("< /script>");
    
21. sb.append("< body>");
    
22. sb.append("< form method=\"post\" name=\"loginForm\">");
    
23. sb.append("< table>");
    
24. sb.append("< tr>");
    
25. sb.append("< td align=\"right\">").append("用户名").append("< /td>");
    
26. sb.append("< td").append("< input type=\"text\" name=\"username\">").append("< /td>"); sb.append("< /tr>");
    
27. sb.append("< tr>");
    
28. sb.append("< td align=\"right\">").append("密 码").append("< /td>");
    
29. sb.append("< td").append("< input type=\"password\" name=\"password\">").append("< /td>"); sb.append("< /tr>");
    
30. sb.append("< tr>");
    
31. sb.append("< td align=\"center\" colspan=\"2\">");
    
32. sb.append("< input type=\"submit\" value=\"登录\" οnclick=\"checkform();\">");
    
33. sb.append(" < input type=\"reset\" value=\"重置\">").append("< /td>");
    
34. sb.append(""); sb.append("< /table>"); sb.append("< /form>");
    
35. sb.append("< /body>");
    
36. sb.append("< /html>");
    
37. return sb.toString();
    
38. }
    
39. }
    
40. 
    
41. import android.app.Activity;
    
42. import android.app.AlertDialog;
    
43. import android.content.DialogInterface;
    
44. import android.os.Bundle;
    
45. import android.os.Handler;
    
46. import android.view.View;
    
47. import android.webkit.JsResult;
    
48. import android.webkit.WebChromeClient;
    
49. import android.webkit.WebSettings;
    
50. import android.webkit.WebView;
    
51. import android.widget.Button;
    
52. import android.widget.TextView;

java代码：

1. 
   
2. public class WebViewTest extends Activity {
   
3. private WebView mWebView = null;
   
4. private TextView txtView = null;
   
5. private Handler mHandler = new Handler();
   
6. /** Called when the activity is first created. */
   
7. @Override
   
8. public void onCreate(Bundle savedInstanceState) {
   
9. super.onCreate(savedInstanceState);
   
10. setContentView(R.layout.main);
    
11. mWebView = (WebView) findViewById(R.id.webView);
    
12. txtView = (TextView) findViewById(R.id.webViewResult);
    
13. WebSettings webSettings = mWebView.getSettings();
    
14. //不保存密码
    
15. webSettings.setSavePassword(false);
    
16. //不保存表单数据
    
17. webSettings.setSaveFormData(false);
    
18. webSettings.setJavaScriptEnabled(true);
    
19. //不支持页面放大功能
    
20. webSettings.setSupportZoom(false);
    
21. mWebView.addJavascriptInterface(new LoginJavaScriptImpl(), "loginImpl"); mWebView.setWebChromeClient(new MyAndroidWebClient());
    
22. ((Button)findViewById(R.id.btnLoadhtml)).setOnClickListener(new View.OnClickListener() {
    
23. public void onClick(View arg0) {
    
24. mWebView.loadData(createWebForm(), "text/html", "UTF-8");
    
25. // mWebView.loadDataWithBaseURL("", createWebForm(), "text/html", "UTF-8", "");
    
26. }
    
27. });
    
28. }
    
29. private String returnValue;
    
30. protected final class LoginJavaScriptImpl {
    
31. public void login(String username, String password){
    
32. returnValue = username + ": " + password; mHandler.post(new Runnable() {
    
33. public void run() { txtView.setText(returnValue);
    
34. }
    
35. });
    
36. }
    
37. }
    
38. private final class MyAndroidWebClient extends WebChromeClient {
    
39. 
    
40. @Override
    
41. public boolean onJsAlert(WebView view,String url, String message, JsResult result) {
    
42. new AlertDialog.Builder(WebViewTest.this) .setTitle("提示信息") .setMessage(message) .setPositiveButton("确定", new DialogInterface.OnClickListener() {
    
43. public void onClick( DialogInterface dialoginterface, int i) { }
    
44. }).show();
    
45. return true;
    
46. }
    
47. 
    
48. }
    
49. 
    

           

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