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EntryActivity.java
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EntryActivity.java
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package com.willy.example;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentStatePagerAdapter;
import androidx.viewpager.widget.ViewPager;
import com.google.android.material.tabs.TabLayout;
import java.util.ArrayList;
import java.util.List;
/**
* Created by willy on 2017/10/13.
*/
public class EntryActivity
extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_entry);
final ViewPager viewPager = findViewById(R.id.viewPager);
viewPager.setAdapter(new SamplePagerAdapter(getSupportFragmentManager()));
final TabLayout tabLayout = findViewById(R.id.tabLayout);
tabLayout.addTab(tabLayout.newTab().setText("Animation Demo"));
tabLayout.addTab(tabLayout.newTab().setText("RecyclerView Demo"));
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
}
private class SamplePagerAdapter
extends FragmentStatePagerAdapter {
private List<Fragment> fragments;
private SamplePagerAdapter(FragmentManager fm) {
super(fm);
fragments = new ArrayList<>();
fragments.add(new DemoFragment());
fragments.add(new ListFragment());
}
@Override
public int getCount() {
return fragments.size();
}
@Override
public Fragment getItem(int position) {
return fragments.get(position);
}
}
}