TabLayout+ViewPager 实现页面切换_tablayout和viewpager设置打开指定页面-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_43573190/article/details/84955774

本文详细介绍如何使用TabLayout和ViewPager组件实现多标签页面切换效果。通过创建自定义适配器和Fragment，实现了动态生成标签和内容，展示了Android应用中常见多标签页面的实现方式。

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MainActivity.this

package com.example.kanghuwei.tablayout;

import android.support.annotation.Nullable;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    private TabLayout tablayout;
    private ViewPager viewpager;
    private ArrayList<Fragment> fragmentlist = new ArrayList<>();
    private ArrayList<String> titlelist = new ArrayList<>();
    private MyBase adapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tablayout = findViewById(R.id.tablayout);
        viewpager = findViewById(R.id.viewpager);
        for (int i = 0; i<5; i++){
            titlelist.add("标题"+i);
            fragmentlist.add(new BlackFragment());
        }
        adapter = new MyBase(getSupportFragmentManager());
        viewpager.setAdapter(adapter);
        // 让tablayout和viewpager关联;
        tablayout.setupWithViewPager(viewpager);

    }
    private class MyBase extends FragmentPagerAdapter {
        public MyBase(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int i) {
            return fragmentlist.get(i);
        }

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

        @Nullable
        @Override
        public CharSequence getPageTitle(int position) {
            return titlelist.get(position);
        }
    }
}

BlackFragment

package com.example.kanghuwei.tablayout;

import android.os.Build;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class BlackFragment extends Fragment {
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        TextView textView = new TextView(getActivity());
        Bundle bundle = getArguments();
        //String name = bundle.getString("name");
        double random = Math.random();
        textView.setText("*********"+random);
        return textView;
    }
    //静态创建自己实例的方法, 并且传递值过来,返回自己;
    public static BlackFragment getInstances(String name){
        BlackFragment blankFragment = new BlackFragment();
        Bundle bundle = new Bundle();
        bundle.putString("name", name);
        blankFragment.setArguments(bundle);
        return blankFragment;
    }
}

XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical"
    >
    <android.support.design.widget.TabLayout
        android:id="@+id/tablayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    </android.support.design.widget.TabLayout>
    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="0dp"

        ></android.support.v4.view.ViewPager>
</LinearLayout>