Android实际开发中的首页框架搭建（二、首页框架实现）

本来这一篇是前两天就要写的，奈何事多缠身，推到今日，为自己的拖延感到愧疚。。。

上一篇大概把项目的结构完成了，下一步就是实现首页切换功能了

首先在activity目录下新建一个HomeActivity,作为承载多个fragment的容器

代码如下

  1 /*
  2  * *
  3  *  * *******************************************************
  4  *  *
  5  *  * @文件名称：HomeActivity.java
  6  *  * @文件作者：ouyangshengduo Copyright(c) 2017. All rights reserved.
  7  *  * @创建时间：17-3-21 下午10:08
  8  *  * @文件描述：
  9  *  * @修改历史：Last modified 17-3-21 下午9:58 ********************************************************
 10  *
 11  */
 12 
 13 package oysd.com.framebulding.activity;
 14 
 15 import android.app.Fragment;
 16 import android.app.FragmentManager;
 17 import android.app.FragmentTransaction;
 18 import android.os.Bundle;
 19 import android.support.v7.app.AppCompatActivity;
 20 import android.view.View;
 21 import android.widget.RelativeLayout;
 22 import android.widget.TextView;
 23 
 24 import oysd.com.framebulding.R;
 25 import oysd.com.framebulding.view.fragment.home.HomeFragment;
 26 import oysd.com.framebulding.view.fragment.home.MessageFragment;
 27 import oysd.com.framebulding.view.fragment.home.MineFragment;
 28 
 29 public class HomeActivity extends AppCompatActivity implements View.OnClickListener {
 30 
 31     /**
 32      * fragment相关
 33      */
 34     private FragmentManager fm;
 35     private HomeFragment mHomeFragment;
 36     private MessageFragment mMessageFragment;
 37     private MineFragment mMineFragment;
 38     private Fragment mCurrent;
 39 
 40 
 41     private RelativeLayout mHomeLayout;
 42     private RelativeLayout mMessageLayout;
 43     private RelativeLayout mMineLayout;
 44     private TextView mHomeView;
 45     private TextView mMessageView;
 46     private TextView mMineView;
 47 
 48     @Override
 49     protected void onCreate(Bundle savedInstanceState) {
 50         super.onCreate(savedInstanceState);
 51         setContentView(R.layout.activity_home_layout);
 52         //初始化这个界面的控件
 53         initView();
 54 
 55         mHomeFragment = new HomeFragment();
 56         fm = getFragmentManager();
 57         FragmentTransaction fragmentTransaction = fm.beginTransaction();
 58         fragmentTransaction.replace(R.id.content_layout,mHomeFragment);
 59         fragmentTransaction.commit();
 60     }
 61 
 62     private void initView() {
 63         mHomeLayout = (RelativeLayout) findViewById(R.id.home_layout_view);
 64         mHomeLayout.setOnClickListener(this);
 65         mMessageLayout = (RelativeLayout) findViewById(R.id.message_layout_view);
 66         mMessageLayout.setOnClickListener(this);
 67         mMineLayout = (RelativeLayout) findViewById(R.id.mine_layout_view);
 68         mMineLayout.setOnClickListener(this);
 69 
 70         mHomeView = (TextView) findViewById(R.id.home_image_view);
 71         mMessageView = (TextView) findViewById(R.id.message_image_view);
 72         mMineView = (TextView) findViewById(R.id.mine_image_view);
 73         mHomeView.setBackgroundResource(R.mipmap.comui_tab_home_selected);
 74     }
 75 
 76     /**
 77      * 隐藏Fragment方法
 78      * @param fragment
 79      * @param ft
 80      */
 81     private void hideFragment(Fragment fragment, FragmentTransaction ft) {
 82         if (fragment != null) {
 83             ft.hide(fragment);
 84         }
 85     }
 86 
 87     @Override
 88     public void onClick(View v) {
 89         FragmentTransaction fragmentTransaction = fm.beginTransaction();
 90         switch (v.getId()) {
 91             case R.id.home_layout_view:
 92                 mHomeView.setBackgroundResource(R.mipmap.comui_tab_home_selected);
 93                 mMessageView.setBackgroundResource(R.mipmap.comui_tab_message);
 94                 mMineView.setBackgroundResource(R.mipmap.comui_tab_person);
 95 
 96                 //隐藏其他的Fragment
 97                 hideFragment(mMessageFragment, fragmentTransaction);
 98                 hideFragment(mMineFragment, fragmentTransaction);
 99                 //将我们的HomeFragment显示出来
100                 if (mHomeFragment == null) {
101                     mHomeFragment = new HomeFragment();
102                     fragmentTransaction.add(R.id.content_layout, mHomeFragment);
103                 } else {
104                     mCurrent = mHomeFragment;
105                     fragmentTransaction.show(mHomeFragment);
106                 }
107                 break;
108             case R.id.message_layout_view:
109                 mMessageView.setBackgroundResource(R.mipmap.comui_tab_message_selected);
110                 mHomeView.setBackgroundResource(R.mipmap.comui_tab_home);
111                 mMineView.setBackgroundResource(R.mipmap.comui_tab_person);
112 
113                 hideFragment(mHomeFragment, fragmentTransaction);
114                 hideFragment(mMineFragment, fragmentTransaction);
115                 if (mMessageFragment == null) {
116                     mMessageFragment = new MessageFragment();
117                     fragmentTransaction.add(R.id.content_layout, mMessageFragment);
118                 } else {
119                     mCurrent = mMessageFragment;
120                     fragmentTransaction.show(mMessageFragment);
121                 }
122                 break;
123             case R.id.mine_layout_view:
124                 mMineView.setBackgroundResource(R.mipmap.comui_tab_person_selected);
125                 mHomeView.setBackgroundResource(R.mipmap.comui_tab_home);
126                 mMessageView.setBackgroundResource(R.mipmap.comui_tab_message);
127                 hideFragment(mMessageFragment, fragmentTransaction);
128                 hideFragment(mHomeFragment, fragmentTransaction);
129                 if (mMineFragment == null) {
130                     mMineFragment = new MineFragment();
131                     fragmentTransaction.add(R.id.content_layout, mMineFragment);
132                 } else {
133                     mCurrent = mMineFragment;
134                     fragmentTransaction.show(mMineFragment);
135                 }
136                 break;
137         }
138 
139         fragmentTransaction.commit();
140     }
141 }

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