Javascript WebView总是调用Android Web浏览器将SVG动态加载到div元素中
我想使用javascript和HTML5将SVG图像动态加载并与之交互到Android WebView中。下面是html源代码Javascript WebView总是调用Android Web浏览器将SVG动态加载到div元素中,javascript,android,svg,webview,Javascript,Android,Svg,Webview,我想使用javascript和HTML5将SVG图像动态加载并与之交互到Android WebView中。下面是html源代码 <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="o
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="obj_idset.js"></script>
<script type="text/javascript" src="global.js"></script>
<script type="text/javascript" src="map_zoom_pan_effects.js"></script>
<script type="text/javascript" src="client-menu_position.js"></script>
<script type="text/javascript" src="client-menu_routing.js"></script>
<script type="text/javascript" src="obj_positionpoint.js"></script>
<script type="text/javascript" src="obj_borderline.js"></script>
<script type="text/javascript" src="obj_borderpoint.js"></script>
<script type="text/javascript" src="obj_edge.js"></script>
<script type="text/javascript" src="obj_polygon.js"></script>
<script type="text/javascript" src="obj_stepmarker.js"></script>
<script type="text/javascript" src="obj_vertex.js"></script>
<script type="text/javascript" src="obj_category.js"></script>
<script type="text/javascript" src="obj_gpsmarker.js"></script>
<script type="text/javascript" src="menu_import.js"></script>
<script type="text/javascript" src="routing.js"></script>
<script type="text/javascript" src="affiliation_match.js"></script>
<script type="text/javascript" src="android.js"></script>
<script type="text/javascript" src="interface.js"></script>
<script type="text/javascript" src="demowalk.js"></script>
<script type="text/javascript" src="convertCoordinates.js"></script>
<script>
$("embed").ready(function() {
// Replaces onload () for initialization may take place only after the DOM has been built completely.
console.log('version 24');
//G.loadMaps(false);
G.init();
G.loadMaps(0);
console.log("???");
});
</script>
</head>
<body>
<div id="location"></div>
<!-- Inside this div the map will be rendered -->
<div id="map_container"></div>
<!-- <div id="page-wrapper">
<h1>Text File Reader</h1>
<div>
Select a text file:
<input type="file" id="fileInput">
</div>
<pre id="fileDisplayArea"><pre>
</div>
-->
<div id="mainmenu">
<p>Set the position</p>
<!-- <button onclick="menu('top');">top</button> -->
<button onclick="Interface.position_setSVG (125,125,0);">Set postion</button>
</div>
</body>
</html>
我错过什么了吗？有谁能给我解决这个问题的办法吗 问题在于Android 4.4 KitKat。 如果上面的应用程序在4.2或更低版本上运行，则运行良好。但是如果在4.4中运行，Android将调用Android浏览器来显示嵌入的svg图像。
由于某些安全特性，KitKat不允许加载存储在内部设备中的文件。必须将文件放在外部服务器上。在webview中加载html的代码行在哪里？那个页面是从哪里来的？@greenapps：我编辑了我的帖子，上面的代码加载了android.html文件。所有html和javascript文件都放在assest文件夹中，当应用程序启动时，它们会被复制到外部文件夹中。webview在外部存储中加载html和javascript。我认为svg将在加载html时显示。但现在我开始认为，在chrome中，用户也必须点击/按下按钮。您的帖子缺少此信息。是否由G.loadMaps在load done完成？我插入Set position按钮以检查svg是否加载到android.html中。如果在android.html中加载，则必须与设置位置按钮一起显示。但您可以看到，并没有加载svg图像，只有设置位置按钮。svg加载到Android web浏览器中。
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
private SvgWebView mWebView;
private Button positionBtn;
private Button destinationBtn;
private Button routingBtn;
private Button clearBtn;
public PlaceholderFragment() {
}
@Override
@SuppressLint({ "JavascriptInterface", "SetJavaScriptEnabled" })
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container,
false);
mWebView = new SvgWebView((WebView) rootView.findViewById(R.id.webView1));
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setBuiltInZoomControls(false);
mWebView.getSettings().setUseWideViewPort(true);
mWebView.getSettings().setSupportZoom(true);
mWebView.getWebView().setInitialScale(0);
mWebView.getWebView().setWebChromeClient(new WebChromeClient());
// http://stackoverflow.com/questions/2378800/clicking-urls-opens-default-browser
mWebView.getWebView().setWebViewClient(new WebViewClient(){
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
CustomJavaScriptHandler js = new CustomJavaScriptHandler(getActivity());
mWebView.getWebView().addJavascriptInterface(js, "svgapp");
js.addInstructor(new CustomJavaScriptHandler.JSInstructor() {
@Override
public void jsinstruct(String s) {
String parts[] = s.split(":");
if (parts[0].equals("position")) {
//nodeSelected(Integer.valueOf(parts[1]));
}
}
});
CopyFilesAsyncTask copyTask = new CopyFilesAsyncTask();
copyTask.execute();
positionBtn = (Button) rootView.findViewById(R.id.positionBtn);
positionBtn.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
mWebView.svgPositionBySvg(100.0, 200.0, 0);
}
});
destinationBtn = (Button) rootView.findViewById(R.id.destinationBtn);
routingBtn = (Button) rootView.findViewById(R.id.routingBtn);
clearBtn = (Button) rootView.findViewById(R.id.clearBtn);
return rootView;
}
/* the function is called after copying files from assest folder to external device */
public void copyFinished() {
try {
Toast.makeText(getActivity(), "Copy done", Toast.LENGTH_LONG).show();
String htmlPath = Utils.getSdDir(Utils.SVG_MAP_DATA_EXT_FOLDER).toURI().toURL().toString() + File.separator + Utils.ANDROID_HTML;
// load the android.html
mWebView.loadUrl(htmlPath);
} catch (MalformedURLException e) {
Log.e(TAG, "Error ", e);
}
}
class CopyFilesAsyncTask extends AsyncTask<Void, Void, Void> {
public CopyFilesAsyncTask() {
}
@Override
protected Void doInBackground(Void... arg0) {
AssetManager assetManager = getActivity().getAssets();
copyAssestsToExtDir(assetManager, Utils.SVG_MAP_DATA_ASSEST_FOLDER);
return null;
}
@Override
protected void onPostExecute(Void arg0) {
copyFinished();
}
}
/* copy files in assest to external dir when the application start */
private void copyAssestsToExtDir(AssetManager assetManager, String subfolder) {
String[] files = null;
try {
files = assetManager.list(subfolder);
} catch (IOException e) {
Log.e(TAG, "Failed to get asset file list.", e);
}
for(String filename : files) {
Log.i(TAG, "File: " + filename);
// this is file, hence copy
InputStream instr = null;
OutputStream outstr = null;
try {
instr = assetManager.open(subfolder + File.separator + filename);
File out_dir = Utils.getSdDir(Utils.SVG_MAP_DATA_EXT_FOLDER);
File outFile = new File(out_dir, filename);
outstr = new FileOutputStream(outFile);
byte[] buffer = new byte[1024];
int read;
while ((read = instr.read(buffer)) != -1) {
outstr.write(buffer, 0, read);
}
outstr.flush();
instr.close();
outstr.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
}