方向改变时片段刷新的活动

Question

Before any one says this looks like a duplicate post .. let me explain a bit, i have search alot to find the solution to my problem but haven't found any solution that can cater my problem ..

i am using drawer layout with fragments and menu in drawer which changes the fragments on menu selection in activity..every fragment have 2 layout one for portrait in layout folder and one in layout-land folder.. when activity is first open it loads the first fragment by default in onCreate() on menu selection fragment is change but when origination is change is shows the first fragment again with landscape layout in layout-land folder which means activity is refreshed..

if i used android:configChanges="orientation with activity .. the problem persist if i uses android:configChanges="orientation|screenSize" then problem is resolved but landscape layout in layout-land is not shown instead shows the portrait layout in layout folder

Main activity

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/Drawer"
android:background="@mipmap/home_background"

tools:context="com.example.minhasoftphp.radius.Home">



    <FrameLayout
        android:id="@+id/fragmentHolder"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>



 <LinearLayout
  android:layout_width="match_parent"
  android:layout_gravity="start"
  android:layout_marginEnd="-65dp"
  android:layout_marginRight="-65dp"
  android:layout_height="match_parent">

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true" >

 <include layout="@layout/drawer_menu"/>

 </ScrollView>

  </LinearLayout>

  </android.support.v4.widget.DrawerLayout>

home.class

public class Home extends AppCompatActivity {

private boolean Toggletitle ;
private DrawerLayout mDrawerlayout ;
private ActionBarDrawerToggle mToggle;

private String Current_Fragment = "home" ;


@Override
protected void onResume() {
    super.onResume();
    loadFragment(new home());
    getSupportActionBar().setTitle(R.string.drawerclosed);
}


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);




    mDrawerlayout = (DrawerLayout) findViewById(R.id.Drawer) ;


     mToggle = new ActionBarDrawerToggle
    (this,mDrawerlayout,R.string.draweropen,R.string.drawerclosed) ; 

    mDrawerlayout.addDrawerListener(mToggle);
    mToggle.syncState();

    getSupportActionBar().setDisplayHomeAsUpEnabled(true);


  //  addmenufragments(Current_Fragment);
  //  loadFragment(new home());
}




@Override
public boolean onOptionsItemSelected(MenuItem item) {

    if(mToggle.onOptionsItemSelected(item))
    {
        if(!Toggletitle || !mDrawerlayout.isDrawerOpen(GravityCompat.START))
        {
            Toggletitle = true ;
            getSupportActionBar().setTitle(R.string.draweropen);
        }

        else if(Toggletitle || mDrawerlayout.isDrawerOpen(GravityCompat.START))
        {
            Toggletitle = false ;
            getSupportActionBar().setTitle(R.string.drawerclosed);
        }

        return true ;

    }

    return super.onOptionsItemSelected(item);
}





public void menu_click(View v)
{

    switch (v.getId())
    {
        case R.id.home :

            mDrawerlayout.closeDrawer(Gravity.LEFT);
            getSupportActionBar().setTitle("Home");
            Current_Fragment = "Home";
            loadFragment(new home());
            break;

        case R.id.profile :

            mDrawerlayout.closeDrawer(Gravity.LEFT);
            getSupportActionBar().setTitle("Profile");
            Current_Fragment = "Profile";
            loadFragment(new profile());
            break;

        case R.id.sell :

            mDrawerlayout.closeDrawer(Gravity.LEFT);
            getSupportActionBar().setTitle("Sell property");
            Current_Fragment = "Sell";
            break;

        case R.id.trans :

            mDrawerlayout.closeDrawer(Gravity.LEFT);
            getSupportActionBar().setTitle("Transactions");
            Current_Fragment = "Transactions";
            break;

        case R.id.events :

            mDrawerlayout.closeDrawer(Gravity.LEFT);
            getSupportActionBar().setTitle("Events");
            Current_Fragment = "Events";
            break;

        case R.id.share :
            mDrawerlayout.closeDrawer(Gravity.LEFT);
            getSupportActionBar().setTitle("Events");
            Current_Fragment = "Events";
            break;
    }

}

public void Onclick(View view)
{
    Intent theIntent = new Intent(this, Catagory.class);


    switch (view.getId())
    {
        case R.id.bharia :

            theIntent.putExtra("category", "Baharia");
            startActivity(theIntent);

            break;


        case R.id.DHAcity :

            theIntent.putExtra("category", "DHA city");
            startActivity(theIntent);

            break;

        case R.id.DHAlhr :
            theIntent.putExtra("category", "DHA Lahore");
            startActivity(theIntent);

            break;

    }

}


private void loadFragment(Fragment fragment) {
// create a FragmentManager
    FragmentManager fm = getFragmentManager();
// create a FragmentTransaction to begin the transaction and replace the Fragment
    FragmentTransaction fragmentTransaction = fm.beginTransaction();
// replace the FrameLayout with new Fragment
    fragmentTransaction.replace(R.id.fragmentHolder, fragment);
    fragmentTransaction.commit(); // save the changes
}


@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
    // Save the user's current game state
    savedInstanceState.putString("fragment", Current_Fragment);
    // Always call the superclass so it can save the view hierarchy state
    super.onSaveInstanceState(savedInstanceState);


}

 @Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
    // Always call the superclass so it can restore the view hierarchy
    super.onRestoreInstanceState(savedInstanceState);
    Current_Fragment = savedInstanceState.getString("fragment");

 }



}

Answer 1

I think you should use onConfigurationChanged in the Layout Activity class and write an if/else condition for the Orientations.

@override  
public void onConfigurationChanged(Configuration newConfig){
    super.onConfigurationChanged(newConfig);  
}