ViewPager+RadioGroup实现标题栏切换,Fragment切换-白红宇

ViewPager+RadioGroup实现标题栏切换,Fragment切换

阅读量：5838 次

发布时间：2019-06-18

本文共 3998 字，大约阅读时间需要 13 分钟。

1.说明：

在使用RadioGroup做标题栏切换的时候,跟ViewPager的滑动有冲突,最后查看了源代码+断点调试攻克了一些碰到的问题,写一篇博客总结一下,有相同需求的朋友能够借鉴一下,自己以后实用到也方便复习。

2.代码结构,以及功能说明

1).主界面的Fragment切换使用ViewPager实现

2).标题栏用RadioGroup实现

3).实现这两个控件的监听函数,改变背景,改变字体颜色,设置当前Fragment,设置当前选中RadioButton

3.主界面代码实现

public class MainActivity extends FragmentActivity {	private RadioButton homeFollow,homeRecommend,homeLocation;	private ViewPager  vPager;	private List
     
       list=new ArrayList
      
       ();	private MyFragmentAdapter adapter;	private final int[] array=new int[]{R.id.home_follow,R.id.home_recommend,R.id.home_location};	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.view_pager_test);				FollowFragment topFragment = new FollowFragment();		RecommendFragment  hotFragment = new RecommendFragment();		LocationFragment locationFragment = new LocationFragment();		list.add(topFragment);		list.add(hotFragment);		list.add(locationFragment);				vPager = (ViewPager) findViewById(R.id.viewpager_home);		adapter = new MyFragmentAdapter(getSupportFragmentManager(), list);		vPager.setAdapter(adapter);		vPager.setOffscreenPageLimit(2);		vPager.setCurrentItem(1);		vPager.setOnPageChangeListener(pageChangeListener);				homeFollow=(RadioButton) findViewById(R.id.home_follow);		homeRecommend=(RadioButton) findViewById(R.id.home_recommend);		homeLocation=(RadioButton) findViewById(R.id.home_location);				RadioGroup group=(RadioGroup) findViewById(R.id.home_page_select);		group.setOnCheckedChangeListener(new OnCheckedChangeListener() {			@Override			public void onCheckedChanged(RadioGroup group,int checkedId){				//设置了ViewPager的当前item就会触发ViewPager的SimpleOnPageChangeListener监听函数				switch (checkedId){				case R.id.home_follow:					vPager.setCurrentItem(0);					break;				case R.id.home_recommend:					vPager.setCurrentItem(1);					break;				case R.id.home_location:					vPager.setCurrentItem(2);					break;				}			}		});	}		SimpleOnPageChangeListener pageChangeListener=new SimpleOnPageChangeListener(){		public void onPageSelected(int position){			change(array[position]);		}	};		/**	 * 改变背景颜色,背景图片	 * @param checkedId	 */	private void change(int checkedId){		//改变背景颜色		homeFollow.setBackgroundResource(R.drawable.icon_top_normal);		homeRecommend.setBackgroundResource(R.drawable.icon_recommend_normal);		homeLocation.setBackgroundResource(R.drawable.icon_location_normal);				//改变字体颜色		homeFollow.setTextColor(getResources().getColor(R.color.white_normal));		homeRecommend.setTextColor(getResources().getColor(R.color.white_normal));		homeLocation.setTextColor(getResources().getColor(R.color.white_normal));				switch (checkedId){		case R.id.home_follow:			homeFollow.setBackgroundResource(R.drawable.icon_top_select);			homeFollow.setTextColor(getResources().getColor(R.color.balck_normal));			homeFollow.setChecked(true);			break;		case R.id.home_recommend:			homeRecommend.setBackgroundResource(R.drawable.icon_recommend_select);			homeRecommend.setTextColor(getResources().getColor(R.color.balck_normal));			homeRecommend.setChecked(true);			break;		case R.id.home_location:			homeLocation.setBackgroundResource(R.drawable.icon_location_select);			homeLocation.setTextColor(getResources().getColor(R.color.balck_normal));			homeLocation.setChecked(true);			break;		}	}}

4.ViewPager适配器

public class MyFragmentAdapter extends FragmentStatePagerAdapter {	private List
     
      list;	public MyFragmentAdapter(FragmentManager fm, List
      
        list) {		super(fm);		this.list = list;	}	public MyFragmentAdapter(FragmentManager fm) {		super(fm);	}	@Override	public Fragment getItem(int arg0) {		return list.get(arg0);	}	@Override	public int getCount() {		return list.size();	}}

5.主界面布局文件

6.效果图例如以下：

另一些布局文件,跟资源文件我就不贴出来了,有须要的能够直接下载源代码

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