Android仿微信主界面的实现方法

<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>

<?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>

/** * 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();    }  }}