Implementing Back Button In Webview Fragment

I want to implement the back button to my app. I'm using fragments that each show a different webview. Right now if I press the back button, it closes the app no matter where I am.

Solution 1:

In your activity override on backpressed:

@OverridepublicvoidonBackPressed() {
        switch (mViewPager.getCurrentItem()) {
        case0:
            if (!webViewGoBack(0)) {
                    //do something if webview cannot go back
            }
            break;
        case1:

            break;
        default:

        }
    }

publicbooleanwebViewGoBack(int num) {
        SectionsPagerAdapteradapter= ((SectionsPagerAdapter)mViewPager.getAdapter());
        Fragmentf= (Fragment )adapter.getFragment(num);
        if (f!= null) {
            return f.webViewGoBack();
        }
        returnfalse;
    }

f.webViewGoBack() the method in you fragment:

public boolean WebViewGoBack() {
if(webView.canGoBack()){
   webView.goBack();
   returntrue;
}
returnfalse; //webview cannot go back, so use the method of the BackButton
}

Solution 2:

Just override onBackPressed() methid of your Activity

Solution 3:

FragmentManagerfragmentManager= getSupportFragmentManager();
                FragmentTransactionfragmentTransaction= fragmentManager
                        .beginTransaction();
                Firstfirst_act=newFirst();

                fragmentTransaction.replace(R.id.fragment_container,
                        first_act);
                fragmentTransaction.addToBackStack("first_act");
                fragmentTransaction.commit();

Add these code in mainactivity , and then use this onbackpressed in fragment

@OverridepublicvoidonBackPressed() {

  }

Solution 4:

You can begin by overriding the back button press in your MainActivity

@OverridepublicvoidonBackPressed() {
    //super.onBackPressed()//handle the press here to switch fragments
}