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POFragment onResume() & onPause() is not called on backstack
 

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  1. POFragment onResume() & onPause() is not called on backstack
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    <p>I have multiple fragment inside an activity. On a button click I am starting a new fragment, adding it to backstack. I naturally expected the <code>onPause()</code> method of current Fragment and <code>onResume()</code> of new Fragment to be called. Well it is not happening.</p> <h2>LoginFragment.java</h2> <pre><code>public class LoginFragment extends Fragment{ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { final View view = inflater.inflate(R.layout.login_fragment, container, false); final FragmentManager mFragmentmanager = getFragmentManager(); Button btnHome = (Button)view.findViewById(R.id.home_btn); btnHome.setOnClickListener(new View.OnClickListener() { public void onClick(View view){ HomeFragment fragment = new HomeFragment(); FragmentTransaction ft2 = mFragmentmanager.beginTransaction(); ft2.setCustomAnimations(R.anim.slide_right, R.anim.slide_out_left , R.anim.slide_left, R.anim.slide_out_right); ft2.replace(R.id.middle_fragment, fragment); ft2.addToBackStack(""); ft2.commit(); } }); } @Override public void onResume() { Log.e("DEBUG", "onResume of LoginFragment"); super.onResume(); } @Override public void onPause() { Log.e("DEBUG", "OnPause of loginFragment"); super.onPause(); } } </code></pre> <h2>HomeFragment.java</h2> <pre><code>public class HomeFragment extends Fragment{ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { final View view = inflater.inflate(R.layout.login_fragment, container, false); } @Override public void onResume() { Log.e("DEBUG", "onResume of HomeFragment"); super.onResume(); } @Override public void onPause() { Log.e("DEBUG", "OnPause of HomeFragment"); super.onPause(); } } </code></pre> <p>What I expected, was,</p> <ol> <li>When button is clicked, <strong>LoginFragment</strong> gets replaced with <strong>HomeFragment</strong>, <code>onPause()</code> of <strong>LoginFragment</strong>, and <code>onResume()</code> of <strong>HomeFragment</strong> gets called</li> <li>When back is pressed, <strong>HomeFragment</strong> is poped out and <strong>LoginFragment</strong> is seen, and <code>onPause()</code> of <strong>HomeFragment</strong> and <code>onResume()</code> of <strong>LoginFragment</strong> gets called.</li> </ol> <p>What I am getting is,</p> <ol> <li>When button is clicked, <strong>HomeFragment</strong> is correctly replacing <strong>LoginFragment</strong>, onResume() of <strong>HomeFragment</strong> is called, but onPause() of <strong>LoginFragment</strong> is never called.</li> <li>When back pressed, <strong>HomeFragment</strong> is correctly popping to reveal <strong>LoginFragment</strong>, onPause() of <strong>HomeFragment</strong> gets called, but onResume() of <strong>LoginFragment</strong> never gets called.</li> </ol> <p>Is this the normal behaviour? Why is <code>onResume()</code> of <strong>LoginFragment</strong> not getting called when I press the back button.</p>
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    1. COAdd the activity code that handles the fragments.
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    2. COi'm having the sample problem, on pause not get called, how did you resolve this,
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      1. USSam
    3. COI had the same problem but realised i was using ft2.add(); instead of ft2.replace(). Only other reason would be if your activity is keeping a reference to the fragment (adding it to a collection, or assigning it to a class variable)
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