我正在尝试删除 ActionBarActivity 的 onStop() 中的所有 fragment ，但这会引发异常:在 onSaveInstanceState 之后无法执行此操作。
我怎样才能做到这一点？
我正在尝试这个。
public class CustomDrawerLayout extends ActionBarActivity implements OnItemClickListener{
private ActionBar ab;
private DrawerLayout dl;
private ListView lv;
private ActionBarDrawerToggle tg;
private LinearLayout navdrawer;
private List<ItensListView> fragments;
private CharSequence tl; //titulo principal
private CharSequence tlf; //titulo fragment
public static final String APP_NAME = "App";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_custom_drawerlayout);
getSupportActionBar().setBackgroundDrawable(new ColorDrawable(getResources().getColor(R.color.action_bar)));
getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
getSupportActionBar().setCustomView(R.layout.actionbar_custom);
init();
openFrag();
}
private void openFrag(){
//verifica notificacao e abre o fragment correspondente
String url = getIntent().getStringExtra("url") != null ? getIntent().getStringExtra("url") : null;
Log.i("URL_NOTIFICACAO->", url != null ? url : "");
if(url != null) {
if (url.equals("Noticias")) {
selectedItem(0);
} else if (url.equals("Eventos")) {
selectedItem(1);
} else if (url.equals("Tarefas") ||
url.equals("Advertencias") ||
url.equals("Agendas")) {
Log.i("Notificacao", url);
Log.i("LOGADO NA SESSION", SessionUsuario.isLogged(this) + "");
if(SessionUsuario.isLogged(this)){
Log.i("Notificao Logado", "esta logado na area do aluno");
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
Fragment frag = AreaAlunoFrag.newInstance();
frag.getArguments().putString("url", url);
ft.replace(R.id.fl, frag);
ft.addToBackStack(APP_NAME);
ft.commit();
}
}
}else{
Log.i("ENTREI FIRST FRAG->","ENTREEIII");
//if(savedInstanceState == null){
selectedItem(0);
//}
}
}
private void init(){
//actionbar
onConfigActionBar();
//listview
configItensListView();
//drawerlayout
dl = (DrawerLayout)findViewById(R.id.dl);
navdrawer = (LinearLayout)findViewById(R.id.navdrawer);
//listview
lv = (ListView)findViewById(R.id.lv);
lv.setAdapter(new DrawerLayoutListViewAdapter(this, fragments));
lv.setOnItemClickListener(this);
//drawerlayout
//dl = (DrawerLayout)findViewById(R.id.dl);
//mDrawerRelativeLayout = (RelativeLayout)findViewById(R.id.left_drawer);
//actionbardrawertoggle
tg = new ActionBarDrawerToggle(this, dl, R.drawable.ic_launcher, R.string.drawer_open){
public void onDrawerClosed(View view) {
ab.setTitle(tl);
supportInvalidateOptionsMenu();
}
public void onDrawerOpened(View view) {
ab.setTitle(tlf);
supportInvalidateOptionsMenu();
}
};
dl.setDrawerListener(tg);
tl = tlf = getTitle();
}
/** ativa actionbar e botao home na action bar */
private void onConfigActionBar(){
ab = getSupportActionBar();
ab.setDisplayHomeAsUpEnabled(true);
ab.setHomeButtonEnabled(true);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
tg.onConfigurationChanged(newConfig);
}
/** necessario */
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
tg.syncState();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (tg.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
/** necessario */
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.custom_drawer_layout, menu);
return true;
}
/** necessario */
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
boolean status = dl.isDrawerOpen(navdrawer);
//menu.findItem(R.id.action_settings).setVisible(!status);
return super.onPrepareOptionsMenu(menu);
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,long id) {
Log.i("POSITION->", position + "");
selectedItem(position);
}
/** seleciona o fragment q sera usado */
private void selectedItem(int position){
FragmentTransaction ft;
Fragment frag;
switch (position){
case 0:
ft = getSupportFragmentManager().beginTransaction();
frag = NoticiaFrag.newInstance();
ft.replace(R.id.fl, frag);
ft.addToBackStack(APP_NAME);
ft.commit();
break;
case 1:
ft = getSupportFragmentManager().beginTransaction();
frag = EventoFrag.newInstance();
ft.replace(R.id.fl, frag);
ft.addToBackStack(APP_NAME);
ft.commit();
break;
case 2:
ft = getSupportFragmentManager().beginTransaction();
frag = LoginFrag.newInstance();
ft.replace(R.id.fl, frag);
ft.addToBackStack(APP_NAME);
ft.commit();
break;
case 3:
ft = getSupportFragmentManager().beginTransaction();
frag = ContatoFrag.newInstance();
ft.replace(R.id.fl, frag);
ft.addToBackStack(APP_NAME);
ft.commit();
break;
case 4:
ft = getSupportFragmentManager().beginTransaction();
frag = CompartilhaFrag.newInstance();
ft.replace(R.id.fl, frag);
ft.addToBackStack(APP_NAME);
ft.commit();
break;
case 5:
ft = getSupportFragmentManager().beginTransaction();
frag = SobreFrag.newInstance();
ft.replace(R.id.fl, frag);
ft.addToBackStack(APP_NAME);
ft.commit();
break;
default:
closeApp();
break;
}
lv.setItemChecked(position, true);
setCustomTitle(fragments.get(position).getTexto());
dl.closeDrawer(navdrawer);
}
/** define o titulo da actionbar */
private void setCustomTitle(String title){
//SpannableString s = new SpannableString(title);
// s.setSpan(new TypefaceSpan(this, BatalhaConfigs.FONT), 0, s.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
//ab.setTitle(s);
//tl = s;
}
@Override
public void onBackPressed() {
//if(getSupportFragmentManager().getBackStackEntryCount() > 0){
// getSupportFragmentManager().popBackStackImmediate();
// }else{
super.onBackPressed();
//}
}
@Override
protected void onResumeFragments() {
super.onResumeFragments();
}
/** Configura o List com as informacoes **/
private void configItensListView(){
fragments = new ArrayList<ItensListView>();
//define
ItensListView itens0 = new ItensListView("Noticias", R.drawable.setavermelha);
ItensListView itens1 = new ItensListView("Eventos", R.drawable.setavermelha);
ItensListView itens2 = new ItensListView("Área do Aluno", R.drawable.setavermelha);
ItensListView itens3 = new ItensListView("Contato", R.drawable.setavermelha);
ItensListView itens4 = new ItensListView("Redes Sociais", R.drawable.setavermelha);
ItensListView itens5 = new ItensListView("Sobre", R.drawable.setavermelha);
ItensListView itens6 = new ItensListView("Sair", R.drawable.setavermelha);
//add
fragments.add(itens0);
fragments.add(itens1);
fragments.add(itens2);
fragments.add(itens3);
fragments.add(itens4);
fragments.add(itens5);
fragments.add(itens6);
//AreaAlunoFrag
}
private void closeApp(){
System.exit(0);
}
@Override
public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {
//super.onSaveInstanceState(outState, outPersistentState);
getSupportFragmentManager().beginTransaction().commitAllowingStateLoss();
}
private void removeAllFrags(){
FragmentManager fm = getSupportFragmentManager();
for(int x = 0; x < fm.getBackStackEntryCount(); x++){
getSupportFragmentManager().beginTransaction().remove(fm.findFragmentById(x)).commit();
}
finish();
}
@Override
protected void onStart() {
new SendProjectId(getApplicationContext());
super.onStart();
}
@Override
protected void onResume() {
PushControl.setIsVisible(true);
new SendProjectId(getApplicationContext());
super.onResume();
}
@Override
protected void onPause() {
PushControl.setIsVisible(false);
super.onPause();
}
@Override
protected void onStop() {
PushControl.setIsVisible(false);
removeAllFrags();
super.onStop();
}
@Override
protected void onDestroy() {
PushControl.setIsVisible(false);
super.onDestroy();
CustomVolleySingleton.getInstance().cancelPendingRequests(CustomVolleySingleton.TAG);
}
}
异常
java.lang.RuntimeException: Unable to stop activity {br.com.ferpapps.santaluzapp/br.com.ferpapps.santaluzapp.menu.CustomDrawerLayout}: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:3323)
at android.app.ActivityThread.handleStopActivity(ActivityThread.java:3369)
at android.app.ActivityThread.access$1000(ActivityThread.java:159)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1343)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:5419)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1365)
at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1383)
at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:636)
at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:615)
at br.com.ferpapps.santaluzapp.menu.CustomDrawerLayout.removeAllFrags(CustomDrawerLayout.java:320)
at br.com.ferpapps.santaluzapp.menu.CustomDrawerLayout.onStop(CustomDrawerLayout.java:348)
at android.app.Instrumentation.callActivityOnStop(Instrumentation.java:1229)
at android.app.Activity.performStop(Activity.java:5516)
at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:3320)
at android.app.ActivityThread.handleStopActivity(ActivityThread.java:3369)
at android.app.ActivityThread.access$1000(ActivityThread.java:159)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1343)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:5419)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
at dalvik.system.NativeStart.main(Native Method)
最佳答案
我遇到了这个问题，如果在调用 SaveInstaceState 之后调用 getFragmentManager() ，则会收到错误。
改变
@Override
protected void onStop() {
PushControl.setIsVisible(false);
removeAllFrags();
super.onStop();
}
至
@Override
protected void onPause() {
PushControl.setIsVisible(false);
removeAllFrags();
super.onPause();
}
关于android - "Can not perform this action after onSaveInstanceState"删除所有 fragment ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32553348/