fragement的循环添加

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fragment的循环添加
···mainactivity类
private RadioButton rb1;
    private RadioButton rb2;
    private RadioButton rb3;
    private RadioButton rb4;
    private RadioGroup rg;
    private ArrayList<Fragment> fragments = new ArrayList<>();
    private LinearLayout lin_act;
    private int index = 0;

private void initData() {

        Mainpresenter mainpresenter = new Mainpresenter();
        mainpresenter.Attchview(this);
        mainpresenter.getData();

}

//加载视图
private void initView() {

        lin_act = (LinearLayout) findViewById(R.id.lin_act);
        rb1 = (RadioButton) findViewById(R.id.rb1);
        rb2 = (RadioButton) findViewById(R.id.rb2);
        rb3 = (RadioButton) findViewById(R.id.rb3);
        rb4 = (RadioButton) findViewById(R.id.rb4);
        rg = (RadioGroup) findViewById(R.id.rg);

        rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, @IdRes int checkedId) {

switch (checkedId) {

case R.id.rb1:

index = 0;

break;

case R.id.rb2:

index = 1;

break;

case R.id.rb3:

index = 2;

break;

case R.id.rb4:

index = 3;

break;

}

showFragment(index);

}
});

}

    /**
     * eventbus的事件订阅者处理事件
     */
    @Subscribe(threadMode = ThreadMode.MAIN)
    public void writeEventBus(){

}

@Override
public void CallBackFragments(ArrayList<Fragment> fragments) {

this.fragments = fragments;

addFragment(fragments);

showFragment(index);

}

private void showFragment(int index) {

FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();

        for (int i = 0; i < fragments.size(); i++) {
            transaction.hide(fragments.get(i));
        }

        transaction.show(fragments.get(index));
        transaction.commit();
    }

private void addFragment(ArrayList<Fragment> fragments) {

for (int i = 0; i < fragments.size(); i++) {

FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();

transaction.add(R.id.lin_act, fragments.get(i));

transaction.commit();

}

···另一个类
public class Mainpresenter extends BasePresenter<MainView> {

private ArrayList<Fragment> fragments;

    public void getData() {
        //四个fragment
        CartFragment cartFragment = new CartFragment();
        ClassifyFragment classifyFragment = new ClassifyFragment();
        HomeFragment homeFragment = new HomeFragment();
        MeFragment meFragment = new MeFragment();

        fragments = new ArrayList<>();
        fragments.add(homeFragment);
        fragments.add(classifyFragment);
        fragments.add(cartFragment);
        fragments.add(meFragment);

getAttchview().CallBackFragments(fragments);

}
}

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