//BaseActivity佈局,MainActivity不添加布局,讓MainActivity繼承BaseActivity

<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width=“match_parent”
android:layout_height=“match_parent”
android:layout_weight=“1”
/>

    <RadioButton
        android:id="@+id/radioButton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:button="@null"
        android:gravity="center"
        android:checked="true"
        android:drawableTop="@drawable/sel1"
        android:text="首頁" />
    <RadioButton
        android:id="@+id/radioButton2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:button="@null"
        android:gravity="center"
        android:drawableTop="@drawable/sel2"
        android:text="電影" />
    <RadioButton
        android:id="@+id/radioButton3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:button="@null"
        android:gravity="center"
        android:drawableTop="@drawable/sel3"
        android:text="影院" />
    <RadioButton
        android:id="@+id/radioButton4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:button="@null"
        android:gravity="center"
        android:drawableTop="@drawable/sel4"
        android:text="演出" />
    <RadioButton
        android:id="@+id/radioButton5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:button="@null"
        android:gravity="center"
        android:drawableTop="@drawable/sel5"
        android:text="我的" />
</RadioGroup>
 

/////BaseActivity為抽象方法
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.RadioGroup;

public abstract class BaseActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_base);
    setLayoutId(R.layout.activity_base);
    //抽取初始化檢視
    initTray();
    //設定介面卡
    initData();
}

protected abstract int setLayoutId(int aa);

protected abstract void initTray() ;

protected abstract void initData();
 

}

///////MainActivity佈局為空,後期繼承BaseActivity

//////繼承BaseActivity
import android.app.Fragment;
import android.support.v13.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.RadioGroup;

import com.bw.qgs.qgs20181022.fragment.FiveFragment;
import com.bw.qgs.qgs20181022.fragment.FourFragment;
import com.bw.qgs.qgs20181022.fragment.OneFragment;
import com.bw.qgs.qgs20181022.fragment.ThreeFragment;
import com.bw.qgs.qgs20181022.fragment.TwoFragment;

import java.util.ArrayList;

public class MainActivity extends BaseActivity {

private ViewPager pager;
private RadioGroup rg;

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

}

@Override
protected int setLayoutId(int aa) {
    return R.layout.activity_main;
}

protected void initTray() {
    //找控制元件
    pager = findViewById(R.id.viewpager);
    rg = findViewById(R.id.rg);
}

protected void initData() {
    final ArrayList<Fragment> list = new ArrayList<Fragment>();
    list.add(new OneFragment());
    list.add(new TwoFragment());
    list.add(new ThreeFragment());
    list.add(new FourFragment());
    list.add(new FiveFragment());
    pager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int i, float v, int i1) {

        }

        @Override
        public void onPageSelected(int i) {
            //找到對應的id
            rg.check(rg.getChildAt(i).getId());
        }

        @Override
        public void onPageScrollStateChanged(int i) {

        }
    });
    rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            //根據點選找到對應的下標
            switch (checkedId){
                case R.id.radioButton1:
                    pager.setCurrentItem(0);
                    break;
                case R.id.radioButton2:
                    pager.setCurrentItem(1);
                    break;
                case R.id.radioButton3:
                    pager.setCurrentItem(2);
                    break;
                case R.id.radioButton4:
                    pager.setCurrentItem(3);
                    break;
                case R.id.radioButton5:
                    pager.setCurrentItem(4);
                    break;
            }
        }
    });
    pager.setAdapter(new FragmentPagerAdapter(getFragmentManager()) {
        @Override
        public Fragment getItem(int i) {
            return list.get(i);
        }

        @Override
        public int getCount() {
            return list.size();
        }
    });
}

}