20 ViewPager demo5,6:FragmentAdapter 导航数据

2022-09-18 09:56:39

Demo5

文件结构：

MainActivity.java

package com.qf.day20_viewpager_demo5;

import java.util.ArrayList;

import java.util.List;

import android.graphics.Color;

import android.os.Bundle;

import android.support.v4.app.Fragment;

import android.support.v4.app.FragmentActivity;

import android.support.v4.app.FragmentManager;

import android.support.v4.app.FragmentPagerAdapter;

import android.support.v4.view.ViewPager;

import android.support.v4.view.ViewPager.OnPageChangeListener;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.LinearLayout;

import android.widget.TextView;

import com.qf.day20_viewpager_demo5.fragment.MyFragment;

public class MainActivity extends FragmentActivity {

    private ViewPager viewPager;

    private List<Fragment> list;

    private TextView[]tvs;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

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

        initTab();

        //数据源  Fragment

        initData();

        //adapter

        viewPager.setAdapter(new MyFragmentPagerAdapter(getSupportFragmentManager()));

        viewPager.setOnPageChangeListener(new OnPageChangeListener() {

            @Override

            public void onPageSelected(int arg0) {

                // TODO Auto-generated method stub

                for(int i=0;i<3;i++){

                    tvs[i].setBackgroundColor(Color.BLUE);

                }

                tvs[arg0].setBackgroundColor(Color.RED);

            }

            @Override

            public void onPageScrolled(int arg0, float arg1, int arg2) {

                // TODO Auto-generated method stub

            }

            @Override

            public void onPageScrollStateChanged(int arg0) {

                // TODO Auto-generated method stub

            }

        });

    }

    //导航书签

    public void initTab() {

        tvs = new TextView[3];

        LinearLayout layout = (LinearLayout) findViewById(R.id.ll);

        for(int i=0;i<3;i++){

            tvs[i] = (TextView) layout.getChildAt(i);

            tvs[i].setBackgroundColor(Color.BLUE);

            tvs[i].setTag(i);

            tvs[i].setOnClickListener(new OnClickListener() {

                @Override

                public void onClick(View v) {

                    // TODO Auto-generated method stub

                    viewPager.setCurrentItem((Integer)v.getTag());

                }

            });

        }

        tvs[0].setBackgroundColor(Color.RED);

    }

    public void initData() {

        list = new ArrayList<Fragment>();

        MyFragment myFragment1 = new MyFragment();

        Bundle bundle = new Bundle();

        bundle.putInt("index", 1);

        myFragment1.setArguments(bundle);

        MyFragment myFragment2 = new MyFragment();

        Bundle bundle1 = new Bundle();

        bundle1.putInt("index", 2);

        myFragment2.setArguments(bundle1);

        MyFragment myFragment3 = new MyFragment();

        Bundle bundle2 = new Bundle();

        bundle2.putInt("index", 3);

        myFragment3.setArguments(bundle2);

        list.add(myFragment1);

        list.add(myFragment2);

        list.add(myFragment3);

    }

    /**

     * 自定义的Adapter

     * @author sxy

     *

     */

    public class MyFragmentPagerAdapter extends FragmentPagerAdapter{

        public MyFragmentPagerAdapter(FragmentManager fm) {

            super(fm);

            // TODO Auto-generated constructor stub

        }

        /**

         * 根据指定的下标  返回对应的Fragmengt对象

         */

        @Override

        public Fragment getItem(int arg0) {

            // TODO Auto-generated method stub

            return list.get(arg0);

        }

        /**

         * Fragment的数量

         */

        @Override

        public int getCount() {

            // TODO Auto-generated method stub

            return list.size();

        }

    }

}

MyFragment.java

package com.qf.day20_viewpager_demo5.fragment;

import com.qf.day20_viewpager_demo5.R;

import android.os.Bundle;

import android.support.v4.app.Fragment;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.TextView;

public class MyFragment extends Fragment {

    private TextView tv;

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container,

            Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        View view = inflater.inflate(R.layout.layout_fragment, container, false);

        tv  = (TextView) view.findViewById(R.id.tv);

        Bundle bundle = getArguments();

        int index = bundle.getInt("index");

        switch (index) {

        case 1:

            tv.setText("新闻");

            break;

        case 2:

            tv.setText("娱乐");

            break;

        case 3:

            tv.setText("段子");

            break;

        default:

            break;

        }

        return view;

    }

}

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

   android:orientation="vertical"

    tools:context=".MainActivity" >

    <LinearLayout

        android:id="@+id/ll"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:orientation="horizontal"

        >

        <TextView

            android:id="@+id/tv_new"

            android:layout_width="0dp"

            android:layout_height="wrap_content"

            android:layout_weight="1"

            android:gravity="center"

            android:text="新闻"

            />

        <TextView

            android:id="@+id/tv_happy"

            android:layout_width="0dp"

            android:layout_height="wrap_content"

            android:layout_weight="1"

             android:gravity="center"

            android:text="娱乐"

            />

        <TextView

            android:id="@+id/tv_dz"

            android:layout_width="0dp"

            android:layout_height="wrap_content"

            android:layout_weight="1"

             android:gravity="center"

            android:text="段子"

            />

    </LinearLayout>

    <android.support.v4.view.ViewPager

        android:id="@+id/viewPager"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        />

</LinearLayout>

layout_fragment.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <TextView

        android:id="@+id/tv"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:textSize="20sp"

        android:textColor="#f00"

        />

</LinearLayout>

Demo6

MainActivity.java

package com.qf.day20_viewpager_demo5;

import java.util.ArrayList;

import java.util.List;

import android.app.ActionBar;

import android.app.ActionBar.Tab;

import android.app.ActionBar.TabListener;

import android.app.FragmentTransaction;

import android.graphics.Color;

import android.os.Bundle;

import android.support.v4.app.Fragment;

import android.support.v4.app.FragmentActivity;

import android.support.v4.app.FragmentManager;

import android.support.v4.app.FragmentPagerAdapter;

import android.support.v4.view.ViewPager;

import android.support.v4.view.ViewPager.OnPageChangeListener;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.LinearLayout;

import android.widget.TextView;

import com.qf.day20_viewpager_demo5.fragment.MyFragment;

public class MainActivity extends FragmentActivity implements TabListener{

    private ViewPager viewPager;

    private List<Fragment> list;

    private TextView[]tvs;

    private ActionBar actionBar;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

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

        actionBar = getActionBar();

        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

        actionBar.addTab(actionBar.newTab().setText("新闻").setTabListener(this));

        actionBar.addTab(actionBar.newTab().setText("娱乐").setTabListener(this));

        actionBar.addTab(actionBar.newTab().setText("段子").setTabListener(this));

        //数据源  Fragment

        initData();

        //adapter

        viewPager.setAdapter(new MyFragmentPagerAdapter(getSupportFragmentManager()));

        viewPager.setOnPageChangeListener(new OnPageChangeListener() {

            @Override

            public void onPageSelected(int arg0) {

//              // TODO Auto-generated method stub

//              for(int i=0;i<3;i++){

//                  tvs[i].setBackgroundColor(Color.BLUE);

//              }

//

//              tvs[arg0].setBackgroundColor(Color.RED);

                //ViewPager绑定ActionBar

                actionBar.setSelectedNavigationItem(arg0);

            }

            @Override

            public void onPageScrolled(int arg0, float arg1, int arg2) {

                // TODO Auto-generated method stub

            }

            @Override

            public void onPageScrollStateChanged(int arg0) {

                // TODO Auto-generated method stub

            }

        });

    }

//  //导航书签

//  public void initTab() {

//      tvs = new TextView[3];

//      LinearLayout layout = (LinearLayout) findViewById(R.id.ll);

//      for(int i=0;i<3;i++){

//          tvs[i] = (TextView) layout.getChildAt(i);

//          tvs[i].setBackgroundColor(Color.BLUE);

//          tvs[i].setTag(i);

//          tvs[i].setOnClickListener(new OnClickListener() {

//

//              @Override

//              public void onClick(View v) {

//                  // TODO Auto-generated method stub

//                  viewPager.setCurrentItem((Integer)v.getTag());

//              }

//          });

//      }

//      tvs[0].setBackgroundColor(Color.RED);

//  }

    public void initData() {

        list = new ArrayList<Fragment>();

        MyFragment myFragment1 = new MyFragment();

        Bundle bundle = new Bundle();

        bundle.putInt("index", 1);

        myFragment1.setArguments(bundle);

        MyFragment myFragment2 = new MyFragment();

        Bundle bundle1 = new Bundle();

        bundle1.putInt("index", 2);

        myFragment2.setArguments(bundle1);

        MyFragment myFragment3 = new MyFragment();

        Bundle bundle2 = new Bundle();

        bundle2.putInt("index", 3);

        myFragment3.setArguments(bundle2);

        list.add(myFragment1);

        list.add(myFragment2);

        list.add(myFragment3);

    }

    /**

     * 自定义的Adapter

     * @author sxy

     *

     */

    public class MyFragmentPagerAdapter extends FragmentPagerAdapter{

        public MyFragmentPagerAdapter(FragmentManager fm) {

            super(fm);

            // TODO Auto-generated constructor stub

        }

        /**

         * 根据指定的下标  返回对应的Fragmengt对象

         */

        @Override

        public Fragment getItem(int arg0) {

            // TODO Auto-generated method stub

            return list.get(arg0);

        }

        /**

         * Fragment的数量

         */

        @Override

        public int getCount() {

            // TODO Auto-generated method stub

            return list.size();

        }

    }

    @Override

    public void onTabReselected(Tab tab, FragmentTransaction ft) {

        // TODO Auto-generated method stub

    }

    @Override

    public void onTabSelected(Tab tab, FragmentTransaction ft) {

        // TODO Auto-generated method stub

        //Tab绑定ViewPager

        viewPager.setCurrentItem(tab.getPosition());

    }

    @Override

    public void onTabUnselected(Tab tab, FragmentTransaction ft) {

        // TODO Auto-generated method stub

    }

}

MyFragment.java

package com.qf.day20_viewpager_demo5.fragment;

import com.qf.day20_viewpager_demo5.R;

import android.os.Bundle;

import android.support.v4.app.Fragment;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.TextView;

public class MyFragment extends Fragment {

    private TextView tv;

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container,

            Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        View view = inflater.inflate(R.layout.layout_fragment, container, false);

        tv  = (TextView) view.findViewById(R.id.tv);

        Bundle bundle = getArguments();

        int index = bundle.getInt("index");

        switch (index) {

        case 1:

            tv.setText("新闻");

            break;

        case 2:

            tv.setText("娱乐");

            break;

        case 3:

            tv.setText("段子");

            break;

        default:

            break;

        }

        return view;

    }

}

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

   android:orientation="vertical"

    tools:context=".MainActivity" >

    <android.support.v4.view.ViewPager

        android:id="@+id/viewPager"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        />

</LinearLayout>

layout_fragment.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <TextView

        android:id="@+id/tv"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:textSize="20sp"

        android:textColor="#f00"

        />

</LinearLayout>

码农公寓

Demo5

Demo6

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