Question

I have a application with a WebView, most of the time it stays portrait mode, but but certain time, I want to force to landscape mode, for example, for image display. How should I do this?

Answer 1

Go step-by-step:

1. Detect whether the resource which is about to be loaded in the WebView is an image or not. The easiest way to do so is just checking the URL extension by setting a WebViewClient and overriding the onPageStarted method. Of course, this is not completely reliable since the URL for images sometimes does not have an extension.
2. Once you know whether the resource is an image or not, you can use the setRequestedOrientation method of the Activity class:

---

if( is an image ) {
   setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
} else {
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}