怎么在Android中利用Fragment实现底部菜单
本篇文章为大家展示了怎么在Android 中利用Fragment实现底部菜单,内容简明扼要并且容易理解,绝对能使你眼前一亮,通过这篇文章的详细介绍希望你能有所收获。
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第一步:添加引用
引用 Crosslight.Xamarin.Android.Support.v7.AppCompat 这个包。
第二步:绘制Main和Fragment界面
fg_home.axml
fg_label.axml
fg_mine.axml
fg_query.axml
Main.axml
main_left.xml
第三步:在value文件下创建Style,并且自定义 BaseAppTheme 样式
#1e89e7 #1976d2 #ff0000 #ffffff
第四步:编写每个Fragment的后台,这里只写一个。
using System; using System.Collections.Generic; using System.Linq; using System.Text; using Android.App; using Android.Content; using Android.OS; using Android.Runtime; using Android.Util; using Android.Views; using Android.Widget; namespace BottomMuneDemo.Fragments { public class HomeFragment : Fragment { private string content { get; set; } public HomeFragment(string content) { this.content = content; } public override void OnCreate(Bundle savedInstanceState) { base.OnCreate(savedInstanceState); // Create your fragment here } public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.Inflate(Resource.Layout.fg_home, container, false); TextView txt_content = (TextView)view.FindViewById(Resource.Id.txt_content); txt_content.Text = "首页"; return view; } } }
第五步:在Main活动中进行设置。
using Android.App; using Android.Widget; using Android.OS; using Android.Support.V7.App; using BottomMuneDemo.Fragments; using Android.Views; namespace BottomMuneDemo { [Activity(Label = "BottomMuneDemo", MainLauncher = true, Theme = "@style/BaseAppTheme")] public class MainActivity : AppCompatActivity { private ImageView iv_home; private ImageView iv_query; private ImageView iv_label; private ImageView iv_mine; private FrameLayout fy_home; private FrameLayout fy_query; private FrameLayout fy_label; private FrameLayout fy_mine; HomeFragment fg1; QueryFragment fg2; LabelFragment fg3; MineFragment fg4; protected override void OnCreate(Bundle savedInstanceState) { base.OnCreate(savedInstanceState); SetContentView(Resource.Layout.Main); fy_home = (FrameLayout)FindViewById(Resource.Id.fy_home); fy_query = (FrameLayout)FindViewById(Resource.Id.fy_query); fy_label = (FrameLayout)FindViewById(Resource.Id.fy_label); fy_mine = (FrameLayout)FindViewById(Resource.Id.fy_mine); iv_home = (ImageView)FindViewById(Resource.Id.iv_home); iv_query = (ImageView)FindViewById(Resource.Id.iv_query); iv_label = (ImageView)FindViewById(Resource.Id.iv_label); iv_mine = (ImageView)FindViewById(Resource.Id.iv_mine); bindViews(); iv_home.PerformClick(); } #region 底部菜单选项卡 //ui组件初始化与事件绑定 private void bindViews() { iv_home.Click += (s, e) => { onClick(iv_home); }; iv_query.Click += delegate { onClick(iv_query); }; iv_label.Click += delegate { onClick(iv_label); }; iv_mine.Click += delegate { onClick(iv_mine); }; } //隐藏所有Fragment private void hideAllFragment(FragmentTransaction fragmentTransaction) { if (fg1 != null) fragmentTransaction.Hide(fg1); if (fg2 != null) fragmentTransaction.Hide(fg2); if (fg3 != null) fragmentTransaction.Hide(fg3); if (fg4 != null) fragmentTransaction.Hide(fg4); iv_home.SetImageResource(Resource.Drawable.icon_home1); iv_query.SetImageResource(Resource.Drawable.icon_query1); iv_label.SetImageResource(Resource.Drawable.icon_label1); iv_mine.SetImageResource(Resource.Drawable.icon_mine1); } //重置所有文本的选中状态 private void setSelected() { iv_home.Selected = false; iv_query.Selected = false; iv_label.Selected = false; iv_mine.Selected = false; } //单击事件 public void onClick(View v) { FragmentTransaction fTransaction = FragmentManager.BeginTransaction(); hideAllFragment(fTransaction); switch (v.Id) { case Resource.Id.iv_home: setSelected(); iv_home.Selected = true; iv_home.SetImageResource(Resource.Drawable.icon_home2); if (fg1 == null) { fg1 = new HomeFragment("首页"); fTransaction.Add(Resource.Id.fy_home, fg1); } else { fTransaction.Show(fg1); } break; case Resource.Id.iv_query: setSelected(); iv_query.Selected = true; iv_query.SetImageResource(Resource.Drawable.icon_query2); if (fg2 == null) { fg2 = new QueryFragment("查询"); fTransaction.Add(Resource.Id.fy_query, fg2); } else { fTransaction.Show(fg2); } break; case Resource.Id.iv_label: setSelected(); iv_label.Selected = true; iv_label.SetImageResource(Resource.Drawable.icon_label2); if (fg3 == null) { fg3 = new LabelFragment("贴签"); fTransaction.Add(Resource.Id.fy_label, fg3); } else { fTransaction.Show(fg3); } break; case Resource.Id.iv_mine: setSelected(); iv_mine.Selected = true; iv_mine.SetImageResource(Resource.Drawable.icon_mine2); if (fg4 == null) { fg4 = new MineFragment("我的"); fTransaction.Add(Resource.Id.fy_mine, fg4); } else { fTransaction.Show(fg4); } break; } fTransaction.Commit(); } #endregion } }
Android是什么
Android是一种基于Linux内核的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由美国Google公司和开放手机联盟领导及开发。
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