001.private class GingerbreadWebViewClient extends WebViewClient {
002. private Object jsInterface;
003. private String jsInterfaceName;
004. private String jsSignature;
005.
006. public GingerbreadWebViewClient(Object jsInterface, String jsInterfaceName, String jsSignature) {
007. this.jsInterface = jsInterface;
008. this.jsInterfaceName = jsInterfaceName;
009. this.jsSignature = jsSignature;
010. }
011.
012.
013. @Override
014. public void onPageFinished(WebView view, String url) {
015. super.onPageFinished(view, url);
016.
017. if (javascriptInterfaceBroken) {
018. StringBuilder gbjs = new StringBuilder();
019.
020. gbjs.append("javascript: ");
021. gbjs.append(generateJS());
022.
023. view.loadUrl(gbjs.toString());
024. }
025.
026.
027. view.loadUrl("javascript: android_init();");
028. }
029.
030.
031.
032.
033.
034.
035.
036.
037. public String generateJS() {
038. StringBuilder gbjs = new StringBuilder();
039.
040. if (javascriptInterfaceBroken) {
041. StringBuilder sb;
042.
043. gbjs.append("var "); gbjs.append(jsInterfaceName); gbjs.append(" = { " +
044. " _gbFix: function(fxname, xargs) {" +
045. " var args = new Array();" +
046. " for (var i = 0; i < xargs.length; i++) {" +
047. " args.push(xargs[i].toString());" +
048. " };" +
049. " var data = { name: fxname, len: args.length, args: args };" +
050. " var json = JSON.stringify(data);" +
051. " var res = prompt('"); gbjs.append(jsSignature); gbjs.append("' + json);" +
052. " return JSON.parse(res)['result'];" +
053. " }" +
054. "};");
055.
056.
057. for (Method m : jsInterface.getClass().getMethods()) {
058. sb = new StringBuilder();
059.
060.
061. sb.append(jsInterfaceName);
062. sb.append(".");
063. sb.append(m.getName());
064. sb.append(" = function() { return this._gbFix('");
065. sb.append(m.getName());
066. sb.append("', arguments); };");
067.
068. gbjs.append(sb);
069. }
070. }
071.
072. return gbjs.toString();
073. }
074.}
075.
076.
077.private class GingerbreadWebViewChrome extends WebChromeClient {
078. private Object jsInterface;
079. private String jsSignature;
080.
081.
082. public GingerbreadWebViewChrome(Object jsInterface, String jsSignature) {
083. this.jsInterface = jsInterface;
084. this.jsSignature = jsSignature;
085. }
086.
087.
088. @Override
089. public boolean onJsPrompt(WebView view, String url, String message, String defaultValue, JsPromptResult result) {
090. if (!javascriptInterfaceBroken || TextUtils.isEmpty(message) || !message.startsWith(jsSignature)) {
091. return false;
092. }
093.
094.
095. JSONObject jsonData;
096. String functionName;
097. String encodedData;
098.
099. try {
100. encodedData = message.substring(jsSignature.length());
101. jsonData = new JSONObject(encodedData);
102. encodedData = null;
103. functionName = jsonData.getString("name");
104.
105. for (Method m : jsInterface.getClass().getMethods()) {
106. if (m.getName().equals(functionName)) {
107. JSONArray jsonArgs = jsonData.getJSONArray("args");
108. Object[] args = new Object[jsonArgs.length()];
109.
110. for (int i = 0; i < jsonArgs.length(); i++) {
111. args[i] = jsonArgs.get(i);
112. }
113.
114. Object ret = m.invoke(jsInterface, args);
115. JSONObject res = new JSONObject();
116. res.put("result", ret);
117. result.confirm(res.toString());
118. return true;
119. }
120. }
121.
122.
123. throw new RuntimeException("shouldOverrideUrlLoading: Could not find method '" + functionName + "()'.");
124. }
125. catch (IllegalArgumentException e) {
126. Log.e("GingerbreadWebViewClient", "shouldOverrideUrlLoading: Please ensure your JSInterface methods only have String as parameters.");
127. throw new RuntimeException(e);
128. }
129. catch (IllegalAccessException e) {
130. throw new RuntimeException(e);
131. }
132. catch (InvocationTargetException e) {
133. throw new RuntimeException(e);
134. }
135. catch (JSONException e) {
136. e.printStackTrace();
137. throw new RuntimeException(e);
138. }
139. }
140.}
