HorizontalScrollView之水平滑動

在關於水平滑動的時候就像是騰訊新聞內的專題滑動，可點擊也可以滑動

首先是頭一個佈局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    tools:context=".MainActivity" >

    <RelativeLayout
        android:id="@+id/rl_tab"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="#F2F2F2" >

        <HorizontalScrollView
            android:id="@+id/mHsv"
            android:layout_width="fill_parent"
            android:layout_height="40dip"
            android:fadingEdge="none"
            android:scrollbars="none" >

            <RelativeLayout
                android:id="@+id/rl_nav"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="top"
                android:background="#5AB0EB" >

                <RadioGroup
                    android:id="@+id/rg_nav_content"
                    android:layout_width="fill_parent"
                    android:layout_height="38dip"
                    android:layout_alignParentTop="true"
                    android:background="#F2F2F2"
                    android:orientation="horizontal" >
                </RadioGroup>

                <ImageView
                    android:id="@+id/iv_nav_indicator"
                    android:layout_width="1dip"
                    android:layout_height="5dip"
                    android:layout_alignParentBottom="true"
                    android:background="#0f0"
                    android:contentDescription="nav_desc"
                    android:scaleType="matrix" />
            </RelativeLayout>
        </HorizontalScrollView>


        <ImageView
            android:id="@+id/iv_nav_right"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:contentDescription="nav_desc"
            android:paddingBottom="1dip"
            android:src="@drawable/iv_navagation_scroll_right"
            android:visibility="visible" >
        </ImageView>
    </RelativeLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/mViewPager"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_below="@id/rl_tab"
        android:layout_gravity="center"
        android:background="#ffffff"
        android:flipInterval="30"
        android:persistentDrawingCache="animation" />

</RelativeLayout>

接下來就是在activity中應用

package com.viewpager.scrollview;

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

import com.lpf.slidingmenudemo.R;
import com.viewpager.scrollview.DataBean.NewsData;

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.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.LinearInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.HorizontalScrollView;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.RelativeLayout;

public class MainActivity extends FragmentActivity {

	private static List<NewsData> listAll = new ArrayList<NewsData>();
	static int refresh = 0;
	public static final String ARGUMENTS_NAME = "arg";
	private RelativeLayout rl_nav;
	private HorizontalScrollView mHsv;
	private RadioGroup rg_nav_content;
	private ImageView iv_nav_indicator;
	private ImageView iv_nav_right;
	private ViewPager mViewPager;
	private int indicatorWidth;
	public static String[] tabTitle = { "選項1", "選項2", "選項3", "選項4", "選項5" };	//標題
	private LayoutInflater mInflater;
	private TabFragmentPagerAdapter mAdapter;
	private int currentIndicatorLeft = 0;
	private static RefreshListView rListView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.file);
		
	 	findViewById();
		initView();
		setListener(); 
	}

	private void setListener() {
		mViewPager.setOnPageChangeListener(new OnPageChangeListener() {
			@Override
			public void onPageSelected(int position) {
				if(rg_nav_content!=null && rg_nav_content.getChildCount()>position){
					((RadioButton)rg_nav_content.getChildAt(position)).performClick();
				}
				
			}
			@Override
			public void onPageScrolled(int arg0, float arg1, int arg2) {
			}
			@Override
			public void onPageScrollStateChanged(int arg0) {
			}
		});
		
		rg_nav_content.setOnCheckedChangeListener(new OnCheckedChangeListener() {
			
			@Override
			public void onCheckedChanged(RadioGroup group, int checkedId) {
				
				if(rg_nav_content.getChildAt(checkedId)!=null){
					
					TranslateAnimation animation = new TranslateAnimation(
							currentIndicatorLeft ,
							((RadioButton) rg_nav_content.getChildAt(checkedId)).getLeft(), 0f, 0f);
					animation.setInterpolator(new LinearInterpolator());
					animation.setDuration(100);
					animation.setFillAfter(true);
					
					//執行位移動畫
					iv_nav_indicator.startAnimation(animation);
					
					mViewPager.setCurrentItem(checkedId);	//ViewPager 跟隨一起 切換
					
					//記錄當前 下標的距最左側的 距離
					currentIndicatorLeft = ((RadioButton) rg_nav_content.getChildAt(checkedId)).getLeft();
					
					 mHsv.smoothScrollTo(
							(checkedId > 1 ? ((RadioButton) rg_nav_content.getChildAt(checkedId)).getLeft() : 0) - ((RadioButton) rg_nav_content.getChildAt(2)).getLeft(), 0);
				 }
			}
		});
	}

	private void initView() {
		DisplayMetrics dm = new DisplayMetrics();
		getWindowManager().getDefaultDisplay().getMetrics(dm);
		indicatorWidth = dm.widthPixels / 4;
		LayoutParams cursor_Params = iv_nav_indicator.getLayoutParams();
		cursor_Params.width = indicatorWidth;// 初始化滑動下標的寬
		iv_nav_indicator.setLayoutParams(cursor_Params);
		//mHsv.setSomeParam(rl_nav, iv_nav_left, iv_nav_right, this);
		//獲取佈局填充器
		mInflater = (LayoutInflater)this.getSystemService(LAYOUT_INFLATER_SERVICE);
		//另一種方式獲取
//		LayoutInflater mInflater = LayoutInflater.from(this);  
		initNavigationHSV();
		mAdapter = new TabFragmentPagerAdapter(getSupportFragmentManager());
		mViewPager.setAdapter(mAdapter);
	}

	private void initNavigationHSV() {
		rg_nav_content.removeAllViews();
		for(int i=0;i<tabTitle.length;i++){
			RadioButton rb = (RadioButton) mInflater.inflate(R.layout.nav_radiogroup_item, null);
			rb.setId(i);
			rb.setText(tabTitle[i]);
			rb.setLayoutParams(new LayoutParams(indicatorWidth,
					LayoutParams.MATCH_PARENT));
			
			rg_nav_content.addView(rb);
		}
		
	}

	private void findViewById() {
		rl_nav = (RelativeLayout) findViewById(R.id.rl_nav);
		mHsv = (HorizontalScrollView) findViewById(R.id.mHsv);
		rg_nav_content = (RadioGroup) findViewById(R.id.rg_nav_content);
		iv_nav_indicator = (ImageView) findViewById(R.id.iv_nav_indicator);
		iv_nav_right = (ImageView) findViewById(R.id.iv_nav_right);
		mViewPager = (ViewPager) findViewById(R.id.mViewPager);
	}
 
	public static class TabFragmentPagerAdapter extends FragmentPagerAdapter{

		public TabFragmentPagerAdapter(FragmentManager fm) {
			super(fm);
		}

		@Override
		public Fragment getItem(int arg0) {
			Fragment ft = null;
			switch (arg0) {
			case 0:
				ft = new LaunchUIFragment();
				break;

			default:
				ft = new CommonUIFragment();
				
				Bundle args = new Bundle();
				args.putString(ARGUMENTS_NAME, tabTitle[arg0]);
				ft.setArguments(args);
				
				break;
			}
			return ft;
		}

		@Override
		public int getCount() {
			
			return tabTitle.length;
		}
		
	}

}

其中的LaunchUIFragment和CommonUIFragment就是兩個fragment佈局，可以自己任意定義