Android中怎么将整个layout放入fragment？

Z时代
2024-02-12
分类：IT

题目描述

fragment结合viewpager实现页面的滑动效果

题目来源及自己的思路

原先自己编写好了一个基于srartActivity()进行跳转的案例a。在后面我又学习了fragment结合viewpager，称为案例b。
现在想把案例a的页面放入案例b，应该如何实现？

相关代码

粘贴代码文本（请勿用截图）
案例b的主要代码：

//MainActivity.class
package com.example.goout;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.viewpager2.widget.ViewPager2;
import java.util.ArrayList;
public class MainActivity_vf extends AppCompatActivity implements View.OnClickListener{
    ViewPager2 viewPager2;
    private LinearLayout lltaxi,llprofile;
    private ImageView ivtaxi,ivprofile,ivCurrent;
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_vf);
        initPager();
        initTabView();
    }
//    初始化导航栏
    private void initTabView(){
        lltaxi=findViewById(R.id.tab_id_taxi);
        lltaxi.setOnClickListener(this);
        llprofile=findViewById(R.id.tab_id_profile);
        llprofile.setOnClickListener(this);
        ivtaxi=findViewById(R.id.tab_iv_taxi);
        ivprofile=findViewById(R.id.tab_iv_profile);
        //第一次进入，设置显示的效果
        ivtaxi.setSelected(true);
        ivCurrent=ivtaxi;
    }
    private void initPager(){
        viewPager2=findViewById(R.id.id_viewpager);
        ArrayList<Fragment> fragments=new ArrayList<>();
        fragments.add(BlankFragment.newInstance("打车"));
        fragments.add(BlankFragment.newInstance("个人中心"));
//        设置适配器
        MyFragmentPagerAdapter pagerAdapter=new MyFragmentPagerAdapter(getSupportFragmentManager(),getLifecycle(),fragments);
        viewPager2.setAdapter(pagerAdapter);
//viewPager2滑动监听器
        viewPager2.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
                super.onPageScrolled(position, positionOffset, positionOffsetPixels);
            }
            //滑到页面时
            @Override
            public void onPageSelected(int position){
                super.onPageSelected(position);
                changeTab(position);
            }
        });
    }
//    改变选中和图片
    private void changeTab(int position){
        ivCurrent.setSelected(false);
        switch (position){
            case R.id.tab_id_taxi:
                viewPager2.setCurrentItem(0);
                break;
            case 0:
                ivtaxi.setSelected(true);
                ivCurrent=ivtaxi;
                break;
            case R.id.tab_id_profile:
                viewPager2.setCurrentItem(1);
                break;
            case 1:
                ivprofile.setSelected(true);
                ivCurrent=ivprofile;
                break;
        }
    }
    @Override
    public void onClick(View view) {
        changeTab(view.getId());
    }
}

//BlankFragment.class
package com.example.goout;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
public class BlankFragment extends Fragment {
    private static final String ARG_TEXT ="param1";
    private String mTextString;
    View rootView;//防止重复解析，造成资源浪费
    public BlankFragment(){}
    public static BlankFragment newInstance(String param1){
        BlankFragment fragment=new BlankFragment();
        Bundle args=new Bundle();
        args.putString(ARG_TEXT,param1);
        fragment.setArguments(args);
        return fragment;
    }
    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments()!=null)
            mTextString=getArguments().getString(ARG_TEXT);
    }
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        if (rootView==null){
            rootView=inflater.inflate(R.layout.fragment_blank, container, false);
        }
        initView();
        return rootView;
    }
    private void initView(){
        TextView tv=rootView.findViewById(R.id.text);
        tv.setText(mTextString);
    }
}