非常简单的viewpager+fragmen实现类似商城app结构

来源：互联网发布：楚乔传网络播放量编辑：程序博客网时间：2024/04/27 19:42

先说下思路在一个activity中的主布局加入supportv4架包中的viewpager，viewpager相当于一个listview，在viewpager中我们要放的fragment，对viewpager做监听，实现想要的效果，代码很简单一看就懂，一直上代码。

主类

package com.example.fragtest;import java.util.ArrayList;import android.support.v7.app.ActionBar;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentActivity;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.app.Activity;import android.os.Bundle;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.TextView;import android.os.Build;public class MainActivity extends FragmentActivity {private ArrayList<Fragment> list;private ViewPager viewPager;private TextView [] tvs=new TextView[4];private int pos=0;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);viewPager=(ViewPager) findViewById(R.id.viewPager);tvs[0]=(TextView) findViewById(R.id.tv_f);tvs[0].setBackgroundColor(0x99999999);tvs[1]=(TextView) findViewById(R.id.tv_s);tvs[2]=(TextView) findViewById(R.id.tv_t);tvs[3]=(TextView) findViewById(R.id.tv_tf);First mFirst=new First();Second msSecond=new Second();third mThird=new third();fourth mFourth=new fourth();list=new ArrayList<Fragment>();list.add(mFirst);list.add(msSecond);list.add(mThird);list.add(mFourth);viewPager.setAdapter(new MyFragAdapter(getSupportFragmentManager(), this, list));viewPager.setOnPageChangeListener(new OnPageChangeListener() {@Overridepublic void onPageSelected(int arg0) {// TODO Auto-generated method stubfor(int i=0;i<4;i++){if(i==arg0){tvs[i].setBackgroundColor(0x99999999);}else{tvs[i].setBackgroundColor(0xffffffff);}}}@Overridepublic void onPageScrolled(int arg0, float arg1, int arg2) {// TODO Auto-generated method stub}@Overridepublic void onPageScrollStateChanged(int arg0) {// TODO Auto-generated method stub}});for(TextView tv:tvs){tv.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View view) {// TODO Auto-generated method stubswitch (view.getId()) {case R.id.tv_f:pos=0;break;case R.id.tv_s:pos=1;break;case R.id.tv_t:pos=2;break;case R.id.tv_tf:pos=3;break;default:break;}for(int i=0;i<4;i++){if(i==pos){tvs[i].setBackgroundColor(0x99999999);}else{tvs[i].setBackgroundColor(0xffffffff);}}viewPager.setCurrentItem(pos);}});}}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.int id = item.getItemId();if (id == R.id.action_settings) {return true;}return super.onOptionsItemSelected(item);}}

adapter

package com.example.fragtest;import java.util.ArrayList;import android.content.Context;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentPagerAdapter;public class MyFragAdapter extends FragmentPagerAdapter{private Context mContext;  private ArrayList<Fragment> mlist;public MyFragAdapter(FragmentManager fm,Context context,ArrayList<Fragment> list) {super(fm);mContext=context;if(list!=null){mlist=list;}else{mlist=new ArrayList<Fragment>();}// TODO Auto-generated constructor stub}@Overridepublic Fragment getItem(int arg0) {// TODO Auto-generated method stubreturn mlist.get(arg0);}@Overridepublic int getCount() {// TODO Auto-generated method stubreturn mlist.size();}}

四个fragment

package com.example.fragtest;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 First extends Fragment{@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// TODO Auto-generated method stubView view=inflater.inflate(R.layout.view, container, false);TextView tv=(TextView) view.findViewById(R.id.tv_name);tv.setText("第一个");return view;}}

package com.example.fragtest;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 Second extends Fragment{@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// TODO Auto-generated method stubView view=inflater.inflate(R.layout.view, container, false);TextView tv=(TextView) view.findViewById(R.id.tv_name);tv.setText("第二个");return view;}}

package com.example.fragtest;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 third extends Fragment{public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// TODO Auto-generated method stubView view=inflater.inflate(R.layout.view, container, false);TextView tv=(TextView) view.findViewById(R.id.tv_name);tv.setText("第三个");return view;}}

package com.example.fragtest;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 fourth extends Fragment{public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// TODO Auto-generated method stubView view=inflater.inflate(R.layout.view, container, false);TextView tv=(TextView) view.findViewById(R.id.tv_name);tv.setText("第四个");return view;}}

主布局

fragment布局

<?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_name"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:gravity="center"    android:textSize="25sp"    android:text="第一个"/></LinearLayout>

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