Android 之 webView 加载 javascropt

核心提示：2. /** Called when the activity is first created. */3. private WebView mWebView;4. private Handler mHandler = new Handler();5.6. @Override7. public void onCreat

2. /** Called when the activity is first created. */

3. private WebView mWebView;

4. private Handler mHandler = new Handler();

5.

6. @Override

7. public void onCreate(Bundle savedInstanceState) {

8. super.onCreate(savedInstanceState);

9. setContentView(R.layout.main);

10. mWebView = (WebView) findViewById(R.id.wv1);

11.

12. WebSettings webSettings = mWebView.getSettings();

13. webSettings.setSavePassword(false);

14. webSettings.setSaveFormData(false);

15. webSettings.setJavaScriptEnabled(true);

16. webSettings.setSupportZoom(false);

17.

18. mWebView.setWebChromeClient(new MyWebChromeClient());

19.

20. mWebView.addJavascriptInterface(new DemoJavaScriptInterface(), "demo");

21.

22. mWebView.loadUrl("file:///android_asset/demo.html");

23. }

24.

25. final class DemoJavaScriptInterface {

26.

27. DemoJavaScriptInterface() {

28. }

29.

30. /**

31. * This is not called on the UI thread. Post a runnable to invoke

32. * loadUrl on the UI thread.

33. */

34. public void clickOnAndroid() {

35.

36. mHandler.post(new Runnable() {

37. public void run() {

38. mWebView.loadUrl("javascript:wave()");

39. }

40. });

41.

42. }

43. }

44.

45. /**

46. * Provides a hook for calling "alert" from javascript. Useful for

47. * debugging your javascript.

48. */

49. final class MyWebChromeClient extends WebChromeClient {

50. @Override

51. public boolean onJsAlert(WebView view, String url, String message,

52. JsResult result) {