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Android中fragment+viewpager实现布局
本文实例为大家分享了Android九宫格图片展示的具体代码，供大家参考，具体内容如下
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1.先布局实现mian.xml
<?xml version="1.0" encoding="utf-8"?>
2.创建3个fragment 要继承Fragment类v4包下的
public class FragmentThree extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
//引入布局文件
View view = inflater.inflate(R.layout.fragmentthree, null);
return view;
}
}
3.创建fragment 相对应的布局文件
<?xml version="1.0" encoding="utf-8"?>
4.创建适配器继承FragmentPagerAdapter
package com.bwei.fragment;
import android.content.Context;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import java.util.List;
public class MyAdapter extends FragmentPagerAdapter {
private List fragments;
private Context context;
//构造方法
public MyAdapter(FragmentManager fm, List fragments, Context context) {
super(fm);
this.fragments = fragments;
this.context = context;
}
//得到item条目
@Override
public Fragment getItem(int position) {
return fragments.get(position);
}
//得到数量
@Override
public int getCount() {
return fragments.size();
}
}
5.在mainActivity实现效果
package com.bwei.fragment;
import android.graphics.Color;
import android.os.Bundle;
import android.support.annotation.IdRes;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener,ViewPager.OnPageChangeListener {
private ViewPager vPager;
private List fragments;
private FragmentManager fm;
private RadioGroup mRadioGroup;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//初始化控件
initView();
initDate();
}
private void initView() {
vPager=(ViewPager) findViewById(R.id.pager);
vPager.setOnPageChangeListener(this);
mRadioGroup=(RadioGroup) findViewById(R.id.radioGroup1);
mRadioGroup.setOnCheckedChangeListener(this);
}
private void initDate() {
fragments=new ArrayList();
//实例化Fragment
FragmentOne fragmentOne = new FragmentOne();
FragmentTwo fragmentTwo = new FragmentTwo();
FragmentThree fragmentThree = new FragmentThree();
//添加到集合
fragments.add(fragmentOne);
fragments.add(fragmentTwo);
fragments.add(fragmentThree);
//得到getSupportFragmentManager()的管理器
fm = getSupportFragmentManager();
//得到适配器
MyAdapter myAdapter = new MyAdapter(fm, fragments, this);
//设置适配器
vPager.setAdapter(myAdapter);
}
//ViewPager.OnPageChangeListener监听事件
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
for (int i = 0; i 6.最后的效果图
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持创新互联。
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