How to add “Go Back” function in WebView inside Fragment?

Question

UPDATE: Solved! Problem was related to my Viewpager not WebView.

I\'m trying to add a \"Go Back\" function to my WebView which is insid

Answer 1

This is how I did in my app. I consume back press event till web view can go back. Once web view cant go back I show hint to user that if he keep on pressing back then app will exit.

It will give user a chance to stay in your app when webview cant go back. I felt it more user friendly:

          //time passed between two back presses.
          private val TIME_INTERVAL = 200 
           // variable to keep track of last back press
          private var mBackPressed: Long = 0


        webView!!.requestFocus()
        webView.setOnKeyListener(View.OnKeyListener { v, keyCode, event ->
            if (keyCode == KeyEvent.KEYCODE_BACK
                    && event.action == MotionEvent.ACTION_UP
                  ) {
                if(webView.canGoBack()) {
                    //go back in previous page
                    webView.goBack()
                    return@OnKeyListener true
                }
                else
                {
                    if (mBackPressed + TIME_INTERVAL > System.currentTimeMillis())
                    {   // dont consume back press and pass to super
                        return@OnKeyListener false
                    }
                    else {
                        // show hint for double back press
                        Toast.makeText(context, " Double Tap back button to exit the demo", Toast.LENGTH_SHORT).show();
                        mBackPressed = System.currentTimeMillis();
                        return@OnKeyListener true
                    }
                }
            }
            return@OnKeyListener false

        })