I've trying and trying these past few days but I just can't get my wodcloud to print the way I want it, this is due to very little knowledge about javascript that I have and very little knowledge on how I can incorporate a javascriptInterface into a webview.
I am using 3 files - d3.html, d3.layout.cloud.js, d3.js. I am mainly editing d3.html as it is what I am loading into my webview through the loadUrl
method. The other two .js
files are from Json Davies D3 Word Cloud generator. Here is the content of my d3.html
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN"
"http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no">
</head>
<h1></h1>
<script src="d3.js"></script>
<script src="d3.layout.cloud.js"></script>
<script type="text/javascript">
function getWebViewSize(){
return Android.getWebViewSize();
}
</script>
<script>(function() {
var fill = d3.scale.category20();
var layout = d3.layout.cloud()
.size([getWebViewSize()[0], getWebViewSize()[1]])
.words([
"Donut", "Eclair", "Froyo", "Gingerbread", "Honeycomb", "Ice Cream Sandwich", "Jelly Bean",
"KitKat", "Lollipop", "Marshmallow"].map(function(d) {
return {text: d, size: 10 + Math.random() * 40};
}))
.padding(5)
.rotate(0)
.font("Impact")
.fontSize(function(d) { return d.size; })
.on("end", draw);
layout.start();
function draw(words) {
d3.select("body").append("svg")
.attr("width", layout.size()[0])
.attr("height", layout.size()[1])
.append("g")
.attr("transform", "translate(" + layout.size()[0] / 2 + "," + layout.size()[1] / 2 + ")")
.selectAll("text")
.data(words)
.enter().append("text")
.style("font-size", function(d) { return d.size + "px"; })
.style("font-family", "Impact")
.style("fill", function(d, i) { return fill(i); })
.attr("text-anchor", "middle")
.attr("transform", function(d) {
return "translate(" + [d.x, d.y] + ")rotate(" + d.rotate + ")";
})
.text(function(d) { return d.text; });
}
})();</script>
<body/>
The problems I am facing :
I can't get the width and height of the webview inside the javascript interface. The .size(
method only accepts I think integer numbers and I can't get the size of the webview I am loading it into. I tried using metrics
and getting from document
which I have no idea how it works but it didn't work.
I can't change the color of the words, whenever I edit any of the styles, it doesn't load into the webview. I can't also add shadows onto the words.
As you can see the words there are still static, how can I get this function
then dynamically change the words and sizes before I load them into the webview?
EDIT :
I tried this to get the width and height but I am getting the following logs, and am nervous about the first one
10-04 10:14:56.234 4550-4550/[package] I/Choreographer: Skipped 35 frames! The application may be doing too much work on its main thread.
10-04 10:15:11.935 30842-30842/[package] I/chromium: [INFO:CONSOLE(20)]
"Uncaught TypeError: Cannot read property '0' of undefined", source: file:///android_asset/wordcloud_html/d3.html (20)
10-04 10:15:14.478 30842-30842/[package] W/art: Attempt to remove local handle scope entry from IRT, ignoring
10-04 10:15:14.478 30842-30842/[package] W/art: Attempt to remove local handle scope entry from IRT, ignoring
10-04 10:15:14.524 30842-30842/[package] W/cr.BindingManager: Cannot call determinedVisibility() - never saw a connection for the pid: 30842
10-04 10:15:14.537 30842-30842/[package] I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@2d741dbf time:1235333
10-04 10:15:14.842 30842-30842/[package] I/chromium: [INFO:CONSOLE(20)] "Uncaught TypeError: Cannot read property '0' of undefined", source: file:///android_asset/wordcloud_html/d3.html (20)
Here is my JavascriptInterface
public class JavaScriptInterface {
Context mContext;
/** Instantiate the interface and set the context */
JavaScriptInterface(Context c) {
mContext = c;
}
@JavascriptInterface
public int[] getWebViewSize()
{
int[] size = new int[2];
size[0] = webview.getWidth();
size[1] = webview.getHeight();
return size;
}
}
Here is the code for loading the webview
webView = view.getWebView();
WebSettings ws = webView.getSettings();
ws.setJavaScriptEnabled(true);
JSInterface = new JavaScriptInterface(context);
webView.setWebViewClient(new InternalWebViewClient());
webView.setBackgroundColor(fragment.getResources().getColor(R.color.analysis_complete_bg));
webView.loadUrl("file:///android_asset/wordcloud_html/d3.html");
webView.addJavascriptInterface(JSInterface, "Android");
For your first problem, I believe you can only return primitives (no arrarys). Also, how is the variable webview
created/accessible? Perhaps you can try to use the interface as a simple pass through. For your third problem, where are the words coming from? Is this back in your android Java? Again, you could wire it as a pass through.
public class JavaScriptInterface {
Context mContext;
int mWidth, mHeight;
string mJSON;
/** Instantiate the interface and set the context */
JavaScriptInterface(Context c, int w, int h, string json) {
mContext = c;
mWidth = w;
mHeight = h;
mJSON = json;
}
@JavascriptInterface
public int getWidth()
{
return wWidth;
}
@JavascriptInterface
public int getHeight()
{
return mHeight;
}
@JavascriptInterface
public string getWords()
{
return mJSON;
}
}
And create it as:
new JavaScriptInterface(AppilyApplication.appContext,
webview.getWidth(),
webview.getHeight(),
"[{\"text\":\"Hello\",\"size\":42},{\"text\":\"world\",\"size\":96}]"
);
And use it in the JavaScript:
.size([Android.getWidth(), Android.getHeight()])
.words(JSON.parse(Android.getWords())
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