RadioGroup+RadioButton切換Fragment

1.設置默認選中項
mainChart.setChecked(true);
setChoiceItem(0);
2.`RadioGroup切換事件

private void setRbChecked() {
        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, @IdRes int i) {
                switch (i) {
                    case R.id.main_chart:
                        setChoiceItem(0);
                        break;
                    case R.id.last_week_sort:
                        setChoiceItem(1);
                        break;
                    case R.id.this_week_sort:
                        setChoiceItem(2);
                        break;
                    case R.id.month_sort:
                        setChoiceItem(3);
                        break;
                    case R.id.completion_mission:
                        setChoiceItem(4);
                        break;
                }
            }
        });
    }`
    ```
**3.顯示和隱藏Fragmen**t

public void setChoiceItem(int index) {
transaction = fManager.beginTransaction();
//隱藏所有Fragment
hideFragments(transaction);
switch (index) {
case 0:
transaction.show(mainChartFragment);
break;
case 1:
transaction.show(lastWeekSortFragment);
break;
case 2:
transaction.show(lastWeekSortFragment);
break;
case 3:
transaction.show(lastWeekSortFragment);
break;
case 4:
transaction.show(missionComplishFragment);
break;
}
transaction.commit();
}

```
    //隱藏所有的Fragment,避免fragment混亂
    private void hideFragments(FragmentTransaction transaction) {
        if (mainChartFragment == null) {
            mainChartFragment = new MainChartFragment();
            transaction.add(R.id.sort_frg_content, mainChartFragment);
        }
        if (lastWeekSortFragment == null) {
            lastWeekSortFragment = new LastWeekSortFragment();
            transaction.add(R.id.sort_frg_content, lastWeekSortFragment);
        }
        if (missionComplishFragment == null) {
            missionComplishFragment = new MissionComplishFragment();
            transaction.add(R.id.sort_frg_content, missionComplishFragment);
        }

        transaction.hide(mainChartFragment);
        transaction.hide(lastWeekSortFragment);
        transaction.hide(missionComplishFragment);
    }