我在片段的switchCompat.setChecked(true)
中执行onViewCreated(...)
。第一次运行良好但从BackStack返回后无法正常工作。
日志显示switchCompat.isChecked()
为真,但 SwitchCompat 的用户界面状态已关闭。有一个名为 isChecked 的parms是如此 OnCheckedChangeListener 中的 onCheckedChanged 也是 false 。
谁能告诉我为什么?
片段
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
......other code......
initialSnooze();
}
private void initialSnooze() {
mSwitchSnooze.setChecked(mAlarm.isSnooze());
Log.d("TAG", "initialSnooze: "+mAlarm.toString()+" "+mSwitchSnooze.isChecked());
}
切换到下一个Fragemnt
private void switchFragment(Fragment fragment,String tag){
FragmentTransaction fragmentTransaction=getSupportFragmentManager().beginTransaction();
fragmentTransaction.addToBackStack(tag);
fragmentTransaction.replace(android.R.id.content, fragment, tag);
fragmentTransaction.commit();
}
从BackStack返回的后退按钮
@Override
public void onBackPressed() {
//回退栈中有Fragment
int count = getSupportFragmentManager().getBackStackEntryCount();
if (count == 0) {
super.onBackPressed();
} else {
getSupportFragmentManager().popBackStack();
}
}
**在第二支部队**
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mAlarm = getArguments().getParcelable(PARAM_ALARM);
}
mAlarm.setSnooze(true);
}
答案 0 :(得分:3)
调用initialSnooze();在onResume()