I'm struggling to create a WebView with transparent background.
webView.setBackgroundColor(0x00FFFFFF);
webView.setBackgroundDrawable(myDrawable);
Then I load a html page with
<body style="background-color:transparent;" ...
The background color of the WebView is transparent but as soon as the page is loaded, it's overwritten by a black background from the html page. This only happens on android 2.2, it works on android 2.1.
So is there something to add in the html page code to make it really transparent ?
This question is related to
android
background
webview
transparency
transparent
This worked for me. try setting the background color after the data is loaded. for that setWebViewClient on your webview object like:
webView.setWebViewClient(new WebViewClient(){
@Override
public void onPageFinished(WebView view, String url)
{
super.onPageFinished(view, url);
webView.setBackgroundColor(Color.BLACK);
}
});
Use this
WebView myWebView = (WebView) findViewById(R.id.my_web);
myWebView.setBackgroundColor(0);
below code works fine Android 3.0+ but when you try this code below android 3.0 then your app forcefully closed.
webView.setLayerType(WebView.LAYER_TYPE_SOFTWARE, null);
You try below code on your less then API 11.
webview.setBackgroundColor(Color.parseColor("#919191"));
Or
you can also try below code which works on all API fine.
webview.setBackgroundColor(Color.parseColor("#919191"));
if (Build.VERSION.SDK_INT >= 11) {
webview.setLayerType(WebView.LAYER_TYPE_SOFTWARE, null);
}
above code use full for me.
At the bottom of this earlier mentioned issue there is an solution. It's a combination of 2 solutions.
webView.setBackgroundColor(Color.TRANSPARENT);
webView.setLayerType(WebView.LAYER_TYPE_SOFTWARE, null);
When adding this code to the WebViewer after loading the url, it works (API 11+).
It even works when hardeware acceleration is ON
I had the same issue with 2.2 and also in 2.3. I solved the problem by giving the alpa value in html not in android. I tried many things and what I found out is setBackgroundColor();
color doesnt work with alpha value. webView.setBackgroundColor(Color.argb(128, 0, 0, 0));
will not work.
so here is my solution, worked for me.
String webData = StringHelper.addSlashes("<!DOCTYPE html><head> <meta http-equiv=\"Content-Type\" " +
"content=\"text/html; charset=utf-8\"> </head><body><div style=\"background-color: rgba(10,10,10,0.5); " +
"padding: 20px; height: 260px; border-radius: 8px;\"> $$$ Content Goes Here ! $$$ </div> </body></html>");
And in Java,
webView = (WebView) findViewById(R.id.webview);
webView.setBackgroundColor(0);
webView.loadData(webData, "text/html", "UTF-8");
And here is the Output screenshot below.
If nothing helps, then most probably you have fixed sized webView
, change the width and height to wrap_content or match_parent
, it should work. That worked for me when I tried to load a Gif.
set the bg after loading the html(from quick tests it seems loading the html resets the bg color.. this is for 2.3).
if you're loading the html from data you already got, just doing a .postDelayed in which you just set the bg(to for example transparent) is enough..
webView.setBackgroundColor(0x00000000);
webView.setLayerType(WebView.LAYER_TYPE_SOFTWARE, null);
this will definitely work.. set background in XML with Editbackground. Now that background will be shown
This is how you do it:
First make your project base on 11, but in AndroidManifest set minSdkVersion to 8
android:hardwareAccelerated="false" is unnecessary, and it's incompatible with 8
wv.setBackgroundColor(0x00000000);
if (Build.VERSION.SDK_INT >= 11) wv.setLayerType(WebView.LAYER_TYPE_SOFTWARE, null);
this.wv.setWebViewClient(new WebViewClient()
{
@Override
public void onPageFinished(WebView view, String url)
{
wv.setBackgroundColor(0x00000000);
if (Build.VERSION.SDK_INT >= 11) wv.setLayerType(WebView.LAYER_TYPE_SOFTWARE, null);
}
});
For safety put this in your style:
BODY, HTML {background: transparent}
worked for me on 2.2 and 4
Following code work for me, though i have multiple webviews and scrolling between them is bit sluggish.
v.setBackgroundColor(Color.TRANSPARENT);
Paint p = new Paint();
v.setLayerType(LAYER_TYPE_SOFTWARE, p);
This worked for me,
mWebView.setBackgroundColor(Color.TRANSPARENT);
Try webView.setBackgroundColor(Color.parseColor("#EDEDED"));
You can user BindingAdapter like this:
Java
@BindingAdapter("setBackground")
public static void setBackground(WebView view,@ColorRes int resId) {
view.setBackgroundColor(view.getContext().getResources().getColor(resId));
view.setLayerType(WebView.LAYER_TYPE_SOFTWARE, null);
}
XML:
<layout >
<data>
<import type="com.tdk.sekini.R" />
</data>
<WebView
...
app:setBackground="@{R.color.grey_10_transparent}"/>
</layout>
Resources
<color name="grey_10_transparent">#11e6e6e6</color>
webView.setBackgroundColor(Color.TRANSPARENT)
before or after loadUrl()
/loadData()
.android:hardwareAccelerated="false"
in the manifest.Tested on IceCream Sandwich
If webview is scrollable:
Add this to the Manifest:
android:hardwareAccelerated="false"
OR
Add the following to WebView in the layout:
android:background="@android:color/transparent"
android:layerType="software"
Add the following to the parents scroll view:
android:layerType="software"
Just use these lines .....
webView.loadDataWithBaseURL(null,"Hello", "text/html", "utf-8", null);
webView.setBackgroundColor(0x00000000);
And remember a point that Always set background color after loading data in webview.
I was trying to put a transparent HTML overlay over my GL view but it has always black flickering which covers my GL view. After several days trying to get rid of this flickering I found this workaround which is acceptable for me (but a shame for android).
The problem is that I need hardware acceleration for my nice CSS animations and so webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
is not an option for me.
The trick was to put a second (empty) WebView
between my GL view and the HTML overlay. This dummyWebView
I told to render in SW mode, and now my HTML overlays renders smooth in HW and no more black flickering.
I don't know if this works on other devices than My Acer Iconia A700, but I hope I could help someone with this.
public class MyActivity extends Activity {
@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
RelativeLayout layout = new RelativeLayout(getApplication());
setContentView(layout);
MyGlView glView = new MyGlView(this);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
dummyWebView = new WebView(this);
dummyWebView.setLayoutParams(params);
dummyWebView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
dummyWebView.loadData("", "text/plain", "utf8");
dummyWebView.setBackgroundColor(0x00000000);
webView = new WebView(this);
webView.setLayoutParams(params);
webView.loadUrl("http://10.0.21.254:5984/ui/index.html");
webView.setBackgroundColor(0x00000000);
layout.addView(glView);
layout.addView(dummyWebView);
layout.addView(webView);
}
}
myWebView.setAlpha(0);
is the best answer. It works!
Try out:
myWebView.setAlpha(0.2f);
Try
webView.setBackgroundColor(0);
This didn't work,
android:background="@android:color/transparent"
Setting the webview
background color as worked
webView.setBackgroundColor(0)
Additionally, I set window background drawable as transparent
The html must have a body
tag with background-color
set to transparent
.
<body style="display: flex; background-color:transparent">some content</body>
WebView wv = (WebView) findViewById(R.id.webView);
wv.setBackgroundColor(0);
wv.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
wv.loadUrl("file:///android_asset/myview.html");
Source: Stackoverflow.com