我正在尝试将JSON格式的数据从我的Android WebView传递到HTML页面。但是，每当我尝试解析原始JSON数据时，应用程序都会崩溃，我希望该数据的格式为{"key":"data"}
我的应用程序的目的是解释此JSON数据，将其形成一个值数组，然后将其发送到HTML页面。这是正确的方法吗？
这是我的WebView代码...
public class MyWebView extends Activity {
WebView mWebView;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.web_view);
mWebView = (WebView) findViewById(R.id.webviewSch);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.addJavascriptInterface(this, "webConnector");
mWebView.loadUrl("file:///android_asset/table.html");
}
public String load() {
return "{\"key\":\"data\"}";
}
}
这是HTML代码...
<html>
<head>
<title>Test</title>
<script type="text/javascript">
function loader() {
var jsonData = window.webConnector.load();
}
</script>
</head>
<body onload="loader()">
Do nothing
</body>
</html>
这是日志猫:
04-15 00:35:44.551: W/dalvikvm(442): JNI WARNING: jarray 0x4053f1a0 points to non-array object (Ljava/lang/String;)
04-15 00:35:44.551: I/dalvikvm(442): "WebViewCoreThread" prio=5 tid=9 NATIVE
04-15 00:35:44.551: I/dalvikvm(442): | group="main" sCount=0 dsCount=0 obj=0x4051bcc0 self=0x19b200
04-15 00:35:44.551: I/dalvikvm(442): | sysTid=451 nice=0 sched=0/0 cgrp=default handle=1684280
04-15 00:35:44.551: I/dalvikvm(442): | schedstat=( 206004592 365607782 69 )
04-15 00:35:44.551: I/dalvikvm(442): at android.webkit.LoadListener.nativeFinished(Native Method)
04-15 00:35:44.551: I/dalvikvm(442): at android.webkit.LoadListener.nativeFinished(Native Method)
04-15 00:35:44.551: I/dalvikvm(442): at android.webkit.LoadListener.tearDown(LoadListener.java:1200)
04-15 00:35:44.551: I/dalvikvm(442): at android.webkit.LoadListener.handleEndData(LoadListener.java:721)
04-15 00:35:44.551: I/dalvikvm(442): at android.webkit.LoadListener.handleMessage(LoadListener.java:219)
04-15 00:35:44.551: I/dalvikvm(442): at android.os.Handler.dispatchMessage(Handler.java:99)
04-15 00:35:44.551: I/dalvikvm(442): at android.os.Looper.loop(Looper.java:130)
04-15 00:35:44.551: I/dalvikvm(442): at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:629)
04-15 00:35:44.551: I/dalvikvm(442): at java.lang.Thread.run(Thread.java:1019)
04-15 00:35:44.551: E/dalvikvm(442): VM aborting
最佳答案
我复制粘贴了您的代码，该代码可以正常工作(未显示任何内容，因为您未显示数据)，但是从Javascript到Android的回调已正确执行。您可以使用以下代码进行检查:
WebView mWebView = (WebView) findViewById(R.id.webView1);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.addJavascriptInterface(this, "webConnector");
mWebView.addJavascriptInterface(this, "toaster");
mWebView.loadUrl("file:///android_asset/table.html");
}
public String load() {
Log.e("HelloJavascript","HelloJavascript");
return "{\"key\":\"data\"}";
}
public void print(String message){
Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
}
和HTML
<html>
<head>
<title>Test</title>
<script type="text/javascript">
function loader() {
var jsonData = window.webConnector.load();
toaster.print(jsonData);
}
</script>
</head>
<body onload="loader()">
Do nothing
</body>
</html>