本文讲述了Android自定义横向滑动菜单的实现。分享给大家供大家参考，具体如下：
前言
开发安卓过程中，经常会用到标题栏的样式，有时候传统方式不能满足开发者的需要，这时候就需要自定义控件来实现。（注意：本文提供思路，有关键代码，但是代码不全）
标题栏说明
自定义标题栏ColumnHorizontalScrollView继承HorizontalScrollView 这个安卓原生的控件，HorizontalScrollView是一种FrameLayout（框架布局），其子项被滚动查看时是整体移动的，并且子项本身可以是一个有复杂层次结构的布局管理器。一个常见的应用是子项在水平方向中，用户可以滚动显示顶层水平排列的子项(items)。
在布局文件中添加ColumnHorizontalScrollView控件
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tabs="http://schemas.android.com/apk/res-auto" android:id="@+id/homeTabs" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@color/db_bg_gray" android:orientation="vertical"> <com.wankr.app.widget.ColumnHorizontalScrollView android:id="@+id/mColumnHorizontalScrollView" android:layout_height="match_parent" android:layout_width="wrap_content" android:layout_centerVertical="true" android:scrollbars="none"> <LinearLayout android:id="@+id/mRadioGroup_content" android:layout_width="fill_parent" android:layout_height="match_parent" android:layout_centerVertical="true" android:gravity="center_vertical" android:orientation="horizontal" android:paddingLeft="10.0dip" android:paddingRight="10.0dip" /> </com.wankr.app.widget.ColumnHorizontalScrollView> <android.support.v4.view.ViewPager android:id="@+id/contentPager" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" /></LinearLayout> |
横向菜单中展示界面
注意：可以设置菜单中标题的宽度大小，最好标题宽度一致。
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package com.example.app;import java.util.ArrayList;import java.util.List;import android.os.Bundle;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentPagerAdapter;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.LayoutParams;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.LinearLayout;import android.widget.TextView;public class MainActivity extends Fragment implements OnClickListener { private ViewPager contentPager; private ContentPagerAdapter pagerAdapter; private ColumnHorizontalScrollView mColumnHorizontalScrollView; private LinearLayout mRadioGroup_content; /** 请求CODE */ public final static int CHANNELREQUEST = 1; /** 屏幕宽度 */ private int mScreenWidth = 0; /** Item宽度 */ private int mItemWidth = 0; /** 当前选中的栏目*/ private int columnSelectIndex = 0; // 标签信息 private List<ChannelItem> channelItems = new ArrayList<ChannelItem>(); @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.activity_main, container , false); this.contentPager = (ViewPager) v.findViewById(R.id.contentPager); this.pagerAdapter = new ContentPagerAdapter(getChildFragmentManager()); this.contentPager.setAdapter(this.pagerAdapter); this.contentPager.setCurrentItem(0); this.contentPager.setOnPageChangeListener(pageListener); this.mColumnHorizontalScrollView = (ColumnHorizontalScrollView) v.findViewById(R.id.mColumnHorizontalScrollView); this.mRadioGroup_content = (LinearLayout) v.findViewById(R.id.mRadioGroup_content); this.setChangeView(); return v; } /** * 设置标题适配器 * @author raotaisen * */ private class ContentPagerAdapter extends FragmentPagerAdapter { public ContentPagerAdapter(FragmentManager fm) { super(fm); // TODO Auto-generated constructor stub } @Override public Fragment getItem(int arg0) { // TODO Auto-generated method stub return null; } @Override public int getCount() { // TODO Auto-generated method stub return channelItems.size(); } /** * 标题设置 */ @Override public CharSequence getPageTitle(int position) { ChannelItem item = channelItems.get(position); return item.getChanneName(); } } /** * ViewPager切换监听方法 * */ public ViewPager.OnPageChangeListener pageListener= new ViewPager.OnPageChangeListener(){ @Override public void onPageScrollStateChanged(int arg0) { } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { } @Override public void onPageSelected(int position) { contentPager.setCurrentItem(position); selectTab(position); } }; /** * 选择的Column里面的Tab * */ private void selectTab(int tab_postion) { columnSelectIndex = tab_postion; for (int i = 0; i < mRadioGroup_content.getChildCount(); i++) { View checkView = mRadioGroup_content.getChildAt(tab_postion); int k = checkView.getMeasuredWidth(); int l = checkView.getLeft(); int i2 = l + k / 2 - mScreenWidth / 2; // rg_nav_content.getParent()).smoothScrollTo(i2, 0); mColumnHorizontalScrollView.smoothScrollTo(i2, 0); // mColumnHorizontalScrollView.smoothScrollTo((position - 2) * // mItemWidth , 0); } //判断是否选中 for (int j = 0; j < mRadioGroup_content.getChildCount(); j++) { View checkView = mRadioGroup_content.getChildAt(j); boolean ischeck; if (j == tab_postion) { ischeck = true; } else { ischeck = false; } checkView.setSelected(ischeck); } // 指向对应的tab位置 switch (tab_postion) { } } /** * 当栏目项发生变化时候调用 */ private void setChangeView() { gettColumnData(); initTabColumn(); } /** * 获取标签栏数据 */ private void gettColumnData() { channelItems.clear(); channelItems.add(new ChannelItem(null, "葱葱")); channelItems.add(new ChannelItem(null, "飞飞")); channelItems.add(new ChannelItem(null, "vv")); channelItems.add(new ChannelItem(null, "刚子")); channelItems.add(new ChannelItem(null, "最新")); /** * 标题可以动态设置长度。获取数据添加到集合中展示。 */ pagerAdapter.notifyDataSetChanged(); } /** *初始化Column栏目项 */ private void initTabColumn() { mRadioGroup_content.removeAllViews(); int count = channelItems.size(); // 设置横向菜单栏中item属性 mColumnHorizontalScrollView.setParam(getActivity(), mScreenWidth, mRadioGroup_content, null, null, null, null); for(int i = 0; i< count; i++){ LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT , LayoutParams.WRAP_CONTENT); params.leftMargin = 6; params.rightMargin = 6;// TextView localTextView = (TextView) mInflater.inflate(R.layout.column_radio_item, null); TextView columnTextView = new TextView(getActivity()); columnTextView.setTextSize(16); columnTextView.setGravity(Gravity.CENTER); columnTextView.setPadding(5, 5, 5, 5); columnTextView.setId(i); columnTextView.setText(channelItems.get(i).getChanneName());// columnTextView.setTextColor(getResources().getColorStateList(R.color.top_category_scroll_text_color_day)); if(columnSelectIndex == i){ columnTextView.setSelected(true); } // 对item的监听 columnTextView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { for(int i = 0;i < mRadioGroup_content.getChildCount();i++){ View localView = mRadioGroup_content.getChildAt(i); if (localView != v) { localView.setSelected(false); }else{ localView.setSelected(true); contentPager.setCurrentItem(i); } }// Toast.makeText(getApplicationContext(), userChannelList.get(v.getId()).getName(), Toast.LENGTH_SHORT).show(); } }); mRadioGroup_content.addView(columnTextView, i ,params); } } @Override public void onClick(View v) { // TODO Auto-generated method stub }} |
标题菜单横向滑动自定义控件
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package com.example.app;import android.app.Activity;import android.content.Context;import android.util.AttributeSet;import android.view.View;import android.widget.HorizontalScrollView;import android.widget.ImageView;public class ColumnHorizontalScrollView extends HorizontalScrollView { /** 传入整体布局 */ private View ll_content; /** 传入更多栏目选择布局 */ private View ll_more; /** 传入拖动栏布局 */ private View rl_column; /** 左阴影图片 */ private ImageView leftImage; /** 右阴影图片 */ private ImageView rightImage; /** 屏幕宽度 */ private int mScreenWitdh = 0; /** 父类的活动activity */ private Activity activity; public ColumnHorizontalScrollView(Context context) { super(context); } public ColumnHorizontalScrollView(Context context, AttributeSet attrs) { super(context, attrs); } public ColumnHorizontalScrollView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } /** * 在拖动的时候执行 * */ @Override protected void onScrollChanged(int paramInt1, int paramInt2, int paramInt3, int paramInt4) { // TODO Auto-generated method stub super.onScrollChanged(paramInt1, paramInt2, paramInt3, paramInt4); shade_ShowOrHide(); if(!activity.isFinishing() && ll_content !=null && leftImage!=null && rightImage!=null && ll_more!=null && rl_column !=null){ if(ll_content.getWidth() <= mScreenWitdh){ leftImage.setVisibility(View.GONE); rightImage.setVisibility(View.GONE); } }else{ return; } if(paramInt1 ==0){ leftImage.setVisibility(View.GONE); rightImage.setVisibility(View.VISIBLE); return; } if(ll_content.getWidth() - paramInt1 + ll_more.getWidth() + rl_column.getLeft() == mScreenWitdh){ leftImage.setVisibility(View.VISIBLE); rightImage.setVisibility(View.GONE); return; } leftImage.setVisibility(View.VISIBLE); rightImage.setVisibility(View.VISIBLE); } /** * 传入父类布局中的资源文件 * */ public void setParam(Activity activity, int mScreenWitdh,View paramView1,ImageView paramView2, ImageView paramView3 ,View paramView4,View paramView5){ this.activity = activity; this.mScreenWitdh = mScreenWitdh; ll_content = paramView1; leftImage = paramView2; rightImage = paramView3; ll_more = paramView4; rl_column = paramView5; } /** * 判断左右阴影的显示隐藏效果 * */ public void shade_ShowOrHide() { if (!activity.isFinishing() && ll_content != null) { measure(0, 0); //如果整体宽度小于屏幕宽度的话，那左右阴影都隐藏 if (mScreenWitdh >= getMeasuredWidth()) { leftImage.setVisibility(View.GONE); rightImage.setVisibility(View.GONE); } } else { return; } //如果滑动在最左边时候，左边阴影隐藏，右边显示 if (getLeft() == 0) { leftImage.setVisibility(View.GONE); rightImage.setVisibility(View.VISIBLE); return; } //如果滑动在最右边时候，左边阴影显示，右边隐藏 if (getRight() == getMeasuredWidth() - mScreenWitdh) { leftImage.setVisibility(View.VISIBLE); rightImage.setVisibility(View.GONE); return; } //否则，说明在中间位置，左、右阴影都显示 leftImage.setVisibility(View.VISIBLE); rightImage.setVisibility(View.VISIBLE); }} |
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服务器之家。
原文链接：https://blog.csdn.net/aa6227716/article/details/45893747
