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Android仿微信主界面的实现方法

2018-05-19 20:39 来源:www.xiazaiwo.net 编辑:admin

本文实例为大家分享了Android模仿微信主界面展示的具体代码,供大家参考,具体内容如下

先看一下效果图

这里写图片描述

实现的原理:

ViewPager+FragmentPagerAdapter

主界面可分为三部分:

  • top标题栏就是一个TextView
  • 中间的ViewPager作为显示的容器,填充Fragment
  • bottom是一个RadioGroup

这里为了布局的优化,将top和bottom抽取出来 ,然后用include将其导入主布局,如下

<LinearLayout 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"
  android:orientation="vertical"
  tools:context=".MainActivity" >

  <include layout="@layout/top" />

  <android.support.v4.view.ViewPager
    android:id="@+id/vp_content"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1" >
  </android.support.v4.view.ViewPager>

  <include layout="@layout/bottom" />
</LinearLayout>

bottom_tab的布局,为了方便管理将它们的共性抽取出来一个style
tab有两种状态,选中和非选中,因此将其背景做成一个选择器selector

<?xml version="1.0" encoding="utf-8"?>
<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/rg_tab_container"
  android:layout_width="match_parent"
  android:layout_height="@dimen/bar_height"
  android:background="@drawable/bottom_bar"
  android:gravity="center"
  android:orientation="horizontal" >

  <RadioButton
    android:id="@+id/rb_tab_weixin"
    style="@style/TabStyle"
    android:checked="true"
    android:drawableTop="@drawable/tab_weixin_selector"
    android:text="@string/tab_weixin" />

  <RadioButton
    android:id="@+id/rb_tab_friend"
    style="@style/TabStyle"
    android:drawableTop="@drawable/tab_friend_selector"
    android:text="@string/tab_friend" />

  <RadioButton
    android:id="@+id/rb_tab_contact"
    style="@style/TabStyle"
    android:drawableTop="@drawable/tab_contact_selector"
    android:text="@string/tab_contact" />

  <RadioButton
    android:id="@+id/rb_tab_setting"
    style="@style/TabStyle"
    android:drawableTop="@drawable/tab_setting_selector"
    android:text="@string/tab_setting" />

</RadioGroup>

最后看一下作为Controller的Activity

  1. 先将需要的控件引入
  2. ViewPager内容的填充,主要是FragmentPagerAdapter适配器
  3. 将Fragment的初始化,将主界面显示的内容分别用Fragment管理,方便代码的管理。
  4. bottom_tab和ViewPager的关联,通过监听ViewPager页面的改变来改变tab的选中状态,然后再通过RadioGroup的事件来改变ViewPager的页面。


/**
 * 主界面 模仿微信界面
 * 
 * @author admin
 * 
 */
public class MainActivity extends FragmentActivity {

  /** tab */
  private RadioGroup mRadioGroup;

  private RadioButton weixinRadioButton;
  private RadioButton friendRadioButton;
  private RadioButton contactRadioButton;
  private RadioButton settingRadioButton;

  /** 显示内容容器 */
  private ViewPager mViewPager;

  private List<Fragment> fragments;

  private Fragment mWeiXinFragment;
  private Fragment mFriendFragment;
  private Fragment mContactFragment;
  private Fragment mSettingFragment;

  private FragmentPagerAdapter mFragmentPagerAdapter;

  private final static int TAB_WEIXIN = 0;
  private final static int TAB_FRIEND = 1;
  private final static int TAB_CONTACT = 2;
  private final static int TAB_SETTING = 3;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_main);

    initView();

    initEvent();
  }

  private void initEvent() {

    mRadioGroup.setOnCheckedChangeListener(myCheckedChangeListener);
    mViewPager.setOnPageChangeListener(myOnPageChangeListener);
  }

  private void initView() {
    mRadioGroup = (RadioGroup) findViewById(R.id.rg_tab_container);

    weixinRadioButton = (RadioButton) findViewById(R.id.rb_tab_weixin);
    friendRadioButton = (RadioButton) findViewById(R.id.rb_tab_friend);
    contactRadioButton = (RadioButton) findViewById(R.id.rb_tab_contact);
    settingRadioButton = (RadioButton) findViewById(R.id.rb_tab_setting);

    mViewPager = (ViewPager) findViewById(R.id.vp_content);

    fragments = new ArrayList<Fragment>();

    mWeiXinFragment = new WeiXinFragment();
    mFriendFragment = new FriendFragment();
    mContactFragment = new ContactFragment();
    mSettingFragment = new SettingFragment();

    fragments.add(mWeiXinFragment);
    fragments.add(mFriendFragment);
    fragments.add(mContactFragment);
    fragments.add(mSettingFragment);
//这里需要继承FragmentActivity
    mFragmentPagerAdapter = new FragmentAdapter(getSupportFragmentManager());
    mViewPager.setAdapter(mFragmentPagerAdapter);

  }

  /**
   * 当页面切换时,tab也跟着切换
   */
  private OnPageChangeListener myOnPageChangeListener = new OnPageChangeListener() {

    @Override
    public void onPageSelected(int arg0) {
      switch (arg0) {
      case TAB_WEIXIN:

        if (!weixinRadioButton.isChecked()) {
          weixinRadioButton.setChecked(true);
        }
        break;
      case TAB_FRIEND:
        friendRadioButton.setChecked(true);

        break;
      case TAB_CONTACT:
        contactRadioButton.setChecked(true);

        break;
      case TAB_SETTING:
        settingRadioButton.setChecked(true);

        break;

      }
    }

    @Override
    public void onPageScrolled(int arg0, float arg1, int arg2) {

    }

    @Override
    public void onPageScrollStateChanged(int arg0) {

    }
  };

  /**
   * 点击tab,切换到相应的页面
   */
  private OnCheckedChangeListener myCheckedChangeListener = new OnCheckedChangeListener() {

    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {

      switch (checkedId) {
      case R.id.rb_tab_weixin:

        mViewPager.setCurrentItem(TAB_WEIXIN);
        break;
      case R.id.rb_tab_friend:

        mViewPager.setCurrentItem(TAB_FRIEND);
        break;
      case R.id.rb_tab_contact:

        mViewPager.setCurrentItem(TAB_CONTACT);
        break;
      case R.id.rb_tab_setting:
        mViewPager.setCurrentItem(TAB_SETTING);

        break;

      }
    }
  };

  private class FragmentAdapter extends FragmentPagerAdapter {

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

    @Override
    public Fragment getItem(int arg0) {
      return fragments.get(arg0);
    }

    @Override
    public int getCount() {
      return fragments.size();
    }

  }

}

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脚本之家。

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