Question

我有一个名为“Main”的活动，其中包含三个片段，其中包含tab 1，tab2，tab3。当tab1可见且app进入后台然后恢复时，tab2将显示给我而不是tab1。我该如何解决这个问题。我已经进行了代码检查

代码： -

 @Override
protected void onResume() {
    super.onResume();
    Log.e(TAG, "onResume called::");
    if (viewPagerCurrentPosition!=0){
        viewPager.setCurrentItem(viewPagerCurrentPosition);
    }
    if (cCustomAlertAdDialog.isShowing()) {
        cCustomAlertAdDialog.dismiss();
    }
    cCustomAlertAdDialog = new CCustomAlertAdDialog(HomeScreenActivity.this);
    // set tabs and fragments in view pager
    setTabAndViewPager();
    /*Reward code*/
    initDrawer();
}
 @Override
public void onTabSelected(TabLayout.Tab tab) {
    viewPager.setCurrentItem(tab.getPosition());
}

@Override
public void onTabReselected(TabLayout.Tab tab) {

}

@Override
public void onTabUnselected(TabLayout.Tab tab) {

}

@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putInt("viewpagerCurrentPosition",viewPager.getCurrentItem());
    Log.e(TAG,"Current position of tab::"+viewPager.getCurrentItem());
}

@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
    super.onRestoreInstanceState(savedInstanceState);
    viewPagerCurrentPosition = savedInstanceState.getInt("viewpagerCurrentPosition");
    Log.e(TAG,"Saved position of tab::"+viewPagerCurrentPosition);
}

并在onRestart我使用了这行代码： -

 if (viewPagerCurrentPosition!=0){
     viewPager.setCurrentItem(viewPagerCurrentPosition);
 }

以上代码在我的方案中不起作用

Answer 1

这是每次加载的默认选项卡。试试这个：在onCreate和onResume

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    viewPager.setCurrentItem(1);

}

@Override
protected void onResume() {
    super.onResume();
    viewPager.setCurrentItem(1);
}

如果有帮助请告诉我

如何恢复android中恢复活动中的现有标签？

1 个答案: