java - Android won't allow the transition of more than one fragment: -
following tutorial here , stackoverflow able make button switch replace current fragment another. elaborate can replace current fragment if wish replace 1 after button app crashes. code:
mainactivity:
public class mainactivity extends activity { public fragmenttransaction transaction = getfragmentmanager().begintransaction(); public fragment loginfragment = new loginfragment(); public fragment mainfragment = new mainfragment(); public fragment settingsfragment = new settingsfragment(); @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); if (savedinstancestate == null) { getfragmentmanager().begintransaction().add(r.id.container, loginfragment).commit(); } else { getfragmentmanager().begintransaction().add(r.id.container, mainfragment).commit(); } } public void gotomain(view v) { transaction.replace(r.id.container, mainfragment); transaction.addtobackstack(null); transaction.commit(); } public void gotosettings(view v) { transaction.replace(r.id.container, settingsfragment); transaction.addtobackstack(null); transaction.commit(); } public static class loginfragment extends fragment { public loginfragment() { } @override public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) { view rootview = inflater.inflate(r.layout.fragment_login, container, false); return rootview; } } public static class mainfragment extends fragment { public mainfragment() { } @override public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) { view rootview = inflater.inflate(r.layout.fragment_main, container, false); return rootview; } } public static class settingsfragment extends fragment { public settingsfragment() { } @override public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) { view rootview = inflater.inflate(r.layout.fragment_settings, container, false); return rootview; } } } login fragment xml:
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.pointlight.kingdomcraft.mainactivity$loginfragment" > <button android:id="@+id/button_submit" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerhorizontal="true" android:layout_centervertical="true" android:onclick="gotomain" android:text="@string/action_submit" /> </relativelayout> main fragment xml:
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.pointlight.kingdomcraft.mainactivity$mainfragment" > <button android:id="@+id/button_settings" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerhorizontal="true" android:layout_centervertical="true" android:onclick="gotosettings" android:text="@string/action_settings" /> </relativelayout> as can see code 2 different transactions same... why android not allow switching of fragments more once?
edit: whatever reason logcat empty
you call commit() on transaction don't call begintransaction() before new replace(...) command.
edit: maybe not clear. meant:
public void gotomain(view v) { fragmenttransaction transaction = getfragmentmanager().begintransaction(); transaction.replace(r.id.container, mainfragment); transaction.addtobackstack(null); transaction.commit(); } and on. can not reuse transaction, don't save it. create new one.
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