How to display image with WebView loaddata?
I've got the following
String urlStr = "http://example.com/my.jpg"
String mimeType = "image/jpeg";
String encoding = null;
String pageData = ""; // This is data read in from an HttpURLConnection
webview.loadDataWithBaseURL(urlStr, pageData, mimeType, encoding, urlStr);
but when I run this, all I see is a blue question mark instead of my image. What is the proper way to handle displaying an image in a WebView 开发者_开发技巧with loadData?
Edit:
Is there a way to do this without passing pageData as <img src="http://example.com/my.jpg/"> ? It seems silly that loadData takes a mime-type if it can only handle "text/html". Especially since the javadoc lists "image/jpeg" as an example mime-type that you might pass in.
It is possible to embedd the base64 encoded imagedata direct into the <img>-tag:
<img src="data:image/jpeg;base64,base64DataHere" />
Here an example for creating the <img>-tag (I use an byte-array instead the String for raw-data, because in my tests an String as source didn't work - I assume that String can't handle binary-data):
byte[] imageRaw = yourImage;
String image64 = Base64.encodeToString(imageRaw, Base64.DEFAULT);
String pageData = "<img src=\"data:image/jpeg;base64," + image64 + "\" />";
The Base64-class was introduced with API v.2.2 - for older API-versions you can copy the sourcefile from git and integrate it in your app. It should work with older API-versions.
Or you can use one of the alternative classes for base64-encoding like Base64Coder.
And here the complete working code for retrieving, converting and showing the image:
byte[] imageRaw = null;
try {
URL url = new URL("http://some.domain.tld/somePicture.jpg");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
ByteArrayOutputStream out = new ByteArrayOutputStream();
int c;
while ((c = in.read()) != -1) {
out.write(c);
}
out.flush();
imageRaw = out.toByteArray();
urlConnection.disconnect();
in.close();
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String image64 = Base64.encodeToString(imageRaw, Base64.DEFAULT);
String urlStr = "http://example.com/my.jpg";
String mimeType = "text/html";
String encoding = null;
String pageData = "<img src=\"data:image/jpeg;base64," + image64 + "\" />";
WebView wv;
wv = (WebView) findViewById(R.id.webview);
wv.loadDataWithBaseURL(urlStr, pageData, mimeType, encoding, urlStr);
Use this.. solve the problem of images load in webview.
WebView webView = (WebView)findViewById(R.id.webView1);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setJavaScriptEnabled(true);
String url ="Path of image";
String imgSrcHtml = "<html><img src='" + url + "' /></html>";
webView.loadData(imgSrcHtml, "text/html", "UTF-8");
加载中,请稍侯......
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