简单抽基类BaseActivity和BaseFragment

1. 抽Activity

public abstract class BaseActivity extends AppCompatActivity {

public abstract int initLayout();
public abstract void initView();
public abstract void initData();
public abstract void initListener();
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(initLayout());//初始化主布局
    initView();//初始化控件
    initData();//初始化数据
    initListener();//初始化监听
}

}

2. 初始化Fragment

public abstract class BaseFragment extends Fragment {

public abstract View initLayout(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState);
public abstract void initView();
public abstract void initData();
public abstract void initListener();
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    return initLayout(inflater, container,savedInstanceState);//初始化主布局
}

@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    initView();//初始化控件
    initData();//初始化数据
    initListener();//初始化监听
}

3.简单Activity列子：
//需要继承BaseActivity
public class Main3Activity extends BaseActivity {

private ArrayList<Fragment> list = new ArrayList<>();
private ViewPager vps;
private RadioGroup rgadio;

//初始化布局
@Override
public int initLayout() {
    return R.layout.activity_main3;
}
//初始化控件
@Override
public void initView() {
    vps = (ViewPager) findViewById(R.id.vp);
    rgadio = (RadioGroup) findViewById(R.id.rg);
}
//初始化数据
@Override
public void initData() {
    list.add(new FragmentOne());
    list.add(new FragmentTwo());
    list.add(new FragmentThree());
    list.add(new FragmentFour());
    list.add(new FragmentFive());
    //设置适配器
    vps.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
        @Override
        public Fragment getItem(int i) {
            return list.get(i);
        }

        @Override
        public int getCount() {
            return list.size();
        }
    });
}
//初始化监听
@Override
public void initListener() {
    getData();//调用监听方法
}
public void getData(){
    //点击事件
    rgadio.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            switch (checkedId){
                case R.id.rb_bnt1:
                    vps.setCurrentItem(0);
                    break;
                case R.id.rb_bnt2:
                    vps.setCurrentItem(1);
                    break;
                case R.id.rb_bnt3:
                    vps.setCurrentItem(2);
                    break;
                case R.id.rb_bnt4:
                    vps.setCurrentItem(3);
                    break;
                case R.id.rb_bnt5:
                    vps.setCurrentItem(4);
                    break;
            }
        }
    });
}

}
4.简单Fragment列子：
//需要继承BaseFragment
public class FragmentTwo extends BaseFragment {

@Override
public View initLayout(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    //初始化布局
    View inflate = inflater.inflate(R.layout.fragmenttwo, container, false);
    return inflate;
}

@Override
public void initView() {
    //初始化数据
}

@Override
public void initData() {
    //初始化数据
}

@Override
public void initListener() {
    //初始化监听
}

}