Android webview loading data performance very slow

Question

Hi I am working on one application, In that I am using Android WebView. Whenever I launch webview activity, loading data in string html format from test.txt file. test.txt f

Answer 1

I have tried below code its working faster for me

// For API level below 18 (This method was deprecated in API level 18)
webview.getSettings().setRenderPriority(RenderPriority.HIGH); 

webview.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
if (Build.VERSION.SDK_INT >= 19) {
    webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
}       
else {
    webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}

Answer 2

I think the following works best:

if (Build.VERSION.SDK_INT >= 19) {
    webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
}       
else {
    webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}

Android 19 has Chromium engine for WebView. I guess it works better with hardware acceleration.

For more info Android 4.4 KitKat, the browser and the Chrome WebView

Hardware Acceleration also do's the trick.You can use it in different levels in your application.

Application level

<application android:hardwareAccelerated="true" ...>

Activity level

<application android:hardwareAccelerated="true">
    <activity ... />
    <activity android:hardwareAccelerated="false" />
</application>

Window level

getWindow().setFlags(
    WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED,
    WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED);

View level

myView.setLayerType(View.LAYER_TYPE_HARDWARE, null);

But as already mentioned in your question can you elaborate the side effects for this ?

Answer 3

In case anyone ends up here still beating their heads against the wall trying to make WebViews render faster, try Crosswalk's XWalkView. Made a huge difference in our app.