可能与重复
切换片段时java.lang.IllegalArgumentException但是问题的情形与此链接不同。
这是我的代码
public class MainActivity extends AppCompatActivity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_layout);
bindWidgetsWithAnEvent();
}
private void bindWidgetsWithAnEvent() {
tabsLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(final TabLayout.Tab tab) {
setCurrentTabFragment(tab.getPosition());
Log.d(TAG, "Position " + tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
Log.d(TAG, String.valueOf(tab.getPosition()));
}
});
}
public void setCurrentTabFragment(int tabPosition) {
switch (tabPosition) {
case 0:
replaceFragment(fragmentName);
break;
case 1:
replaceFragment(fragmentName);
break;
default:
break;
}
}
public void replaceFragment(Fragment fragment) {
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.flContent, fragment);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
ft.commit();
}
@Override
protected void onStart() {
super.onStart();
}
}
以下是Google控制台捕获的stacktrace，但在搜索后仍未获得解决方案。如果有人有更好的解决方案或存在相同的问题，请告诉我。
java.lang.IllegalStateException:
at android.support.v4.app.FragmentManagerImpl.checkStateLoss (FragmentManager.java:1842)
at android.support.v4.app.FragmentManagerImpl.enqueueAction (FragmentManager.java:1860)
at android.support.v4.app.BackStackRecord.commitInternal (BackStackRecord.java:650)
at android.support.v4.app.BackStackRecord.commit (BackStackRecord.java:609)
at com.safarifone.waafi.ui.activities.MainActivity.replaceFragment (MainActivity.java:354)
at com.safarifone.waafi.ui.activities.MainActivity.setCurrentTabFragment (MainActivity.java:336)
at com.safarifone.waafi.ui.activities.MainActivity$3.onTabSelected (MainActivity.java:303)
at android.support.design.widget.TabLayout.dispatchTabSelected (TabLayout.java:1164)
at android.support.design.widget.TabLayout.selectTab (TabLayout.java:1157)
at android.support.design.widget.TabLayout.selectTab (TabLayout.java:1127)
at android.support.design.widget.TabLayout$Tab.select (TabLayout.java:1426)
at android.support.design.widget.TabLayout$TabView.performClick (TabLayout.java:1536)
at android.view.View$PerformClick.run (View.java:20300)
at android.os.Handler.handleCallback (Handler.java:815)
at android.os.Handler.dispatchMessage (Handler.java:104)
at android.os.Looper.loop (Looper.java:210)
at android.app.ActivityThread.main (ActivityThread.java:5833)
at java.lang.reflect.Method.invoke (Native Method)
at java.lang.reflect.Method.invoke (Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:1113)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:879)
帮助将不胜感激
基本上，当您替换片段时，它会丢失其状态，这在Android操作系统中是众所周知的错误，并且多数情况下是在您的活动处于暂停状态时发生的。我面临类似的问题，我通过引入bollean变量并在catch块中将其设置为true来解决此问题。您可以重现此错误，只需在提交片段时添加10到15秒的后处理，然后运行活动并在10 15秒后将其置于onpause状态，当活动处于onpause状态时尝试提交片段时，您会发现崩溃。
public void replaceFragment(Fragment fragment) {
try {
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.flContent, fragment);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
ft.commit();
}catch (Exception e)
{
stateSaveFragment = true;
e.printStackTrace();
}
}
然后在活动的恢复方法中替换您的片段，然后再次将stateSaveFragment设置为false。我这样解决，对您有帮助。
@Override
protected void onPostResume() {
super.onPostResume();
if(stateSaveFragment){
replaceFragment(fragmentName);
}
stateSaveFragment=false;
}
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