Fragment

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package com.example.day13;import android.support.design.widget.TabLayout;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentPagerAdapter;import android.support.v4.view.ViewPager;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;public class MainActivity extends AppCompatActivity {    private TabLayout out;    private ViewPager vp;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);         out=  (TabLayout) findViewById(R.id.tablay);         vp=  (ViewPager) findViewById(R.id.vp);        vp.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {            @Override            public Fragment getItem(int position) {                return new Frament();            }            @Override            public int getCount() {                return 3;            }            @Override            public CharSequence getPageTitle(int position) {                return "tab"+(position+1);            }        });        //动态添加/*        out.addTab(out.newTab().setText("tab_1"));        out.addTab(out.newTab().setText("tab_2"));        out.addTab(out.newTab().setText("tab_3"));*/        //关联Viewpear        out.setupWithViewPager(vp);    }}
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