Question

headers: { 'Accept': 'application/json', 'Content-Type': 'application/json' }

我想根据位置设置文字，我成功定位

package com.agri.kishan;

import android.os.Bundle;
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.support.v7.widget.Toolbar;
import android.widget.TextView;
import android.widget.Toast;
import com.agri.kishan.OneFragment;

import java.util.ArrayList;
import java.util.List;

import com.agri.kishan.OneFragment;

public class ScrollableTabsActivity extends AppCompatActivity {

    private Toolbar toolbar;
    private TabLayout tabLayout;
    private ViewPager viewPager;
    public static int tabsele;
    public static String realqus="this is a sample qus";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_scrollable_tabs);
        //

        //
        toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        viewPager = (ViewPager) findViewById(R.id.viewpager);
        setupViewPager(viewPager);

        tabLayout = (TabLayout) findViewById(R.id.tabs);
        tabLayout.setupWithViewPager(viewPager);
        tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                viewPager.setCurrentItem(tab.getPosition());
                Toast.makeText(getApplicationContext(),tab.getPosition()+"",Toast.LENGTH_SHORT).show();
                 tabsele=tab.getPosition();
                /////////////////////////////////////////
                /////////////////////////////////
                ///////////////////

片段页面片段页面是一个简单的片段页面，里面有文本视图，我从活动中得到了标签的位置我想根据活动中的位置将文本更改为片段中的textview

Fragement页面 包com.agri.kishan;

                if(tabsele==0)
                {
                   OneFragment.tv.setText("hai");



                } else if(tabsele==1)
                {
                    OneFragment.tv.setText("bye");
                }
                //////////////////
                ////////////////////////////////
                ///////////////////////////////////////////



            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {

            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {

            }
        });

    }

    private void setupViewPager(ViewPager viewPager) {
        ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
        for(int i=0;i<=Card_display.counttabs;i++) {
            adapter.addFrag(new OneFragment(), "Qus:"+i);
        }

        viewPager.setAdapter(adapter);
    }

    class ViewPagerAdapter extends FragmentPagerAdapter {
        private final List<Fragment> mFragmentList = new ArrayList<>();
        private final List<String> mFragmentTitleList = new ArrayList<>();


        public ViewPagerAdapter(FragmentManager manager) {
            super(manager);
        }

        @Override
        public Fragment getItem(int position) {

            return mFragmentList.get(position);
        }


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

        public void addFrag(Fragment fragment, String title) {
            mFragmentList.add(fragment);
            mFragmentTitleList.add(title);

        }

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

}

Answer 1

尝试这种方法在onTabSelected

内

  OneFragment page = (OneFragment)viewPager.getAdapter().getItem(tab.getPosition());
page.tv.setText("Hi");

选项卡动态添加，如何设置文本

1 个答案: