最近想弄一个双导航功能,查看了许多资料,总算是实现了功能,这边就算是给自己几个笔记吧!

先来看看效果

android 两个界面滑动 安卓双界面_android

那么就开始实现了!

底部导航栏我选择用FragmentTabHost+Fragment来实现,这个方法我觉得挺好用的,代码量也不多

首先是开始的activity_main.xml


<RelativeLayout 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"
    tools:context="${relativePackage}.${activityClass}" >

    <FrameLayout
        android:id="@+id/main_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/main_tab"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" >

    </FrameLayout>

        <view
        android:id="@+id/main_tab"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true" 
        class="android.support.v4.app.FragmentTabHost" />

</RelativeLayout>

其中我是直接拉的view所以是形成的FragmentTabHost

也可以直接在xml文件里面写

<android.support.v4.view.FragmentTabHost >

</android.support.v4.view.FragmentTabHost>

这xml文件就一个view加一个tab  view用来显示碎片,tab用来放置底部按钮的数量

再来是tab_foot.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#F6F6F6"
    android:gravity="center"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/foot_iv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/home1" />

    <TextView
        android:id="@+id/foot_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="3dp"
        android:text="首页"
        android:textColor="@color/tab_color" />

</LinearLayout>

这是每个底部按钮的布局设置的xml文件

android 两个界面滑动 安卓双界面_双导航_02

显示效果。

再来是MainActivity的代码


package com.gjn.mynavigation;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTabHost;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.widget.ImageView;
import android.widget.TabWidget;
import android.widget.TextView;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TabHost.TabSpec;

public class MainActivity extends FragmentActivity implements OnTabChangeListener {

	private FragmentTabHost mTabHost;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_main);
		
		//初始化FragmentTabHost
		initHost();
		//初始化底部导航栏
		initTab();
		//默认选中
		mTabHost.onTabChanged(TabDb.getTabsTxt()[0]);
	}

	private void initTab() {
		String[] tabs = TabDb.getTabsTxt();
		for (int i = 0; i < tabs.length; i++) {
			//新建TabSpec
			TabSpec tabSpec = mTabHost.newTabSpec(TabDb.getTabsTxt()[i]);
			//设置view
			View view = LayoutInflater.from(this).inflate(R.layout.tabs_foot, null);
			((TextView) view.findViewById(R.id.foot_tv)).setText(TabDb.getTabsTxt()[i]);
			((ImageView) view.findViewById(R.id.foot_iv)).setImageResource(TabDb.getTabsImg()[i]);
			tabSpec.setIndicator(view);
			//加入TabSpec
			mTabHost.addTab(tabSpec,TabDb.getFramgent()[i],null);
		}
	}
	/***
	 * 初始化Host
	 */
	private void initHost() {
		mTabHost = (FragmentTabHost) findViewById(R.id.main_tab);
		//调用setup方法 设置view
		mTabHost.setup(this, getSupportFragmentManager(),R.id.main_view);
		//去除分割线
		mTabHost.getTabWidget().setDividerDrawable(null);
		//监听事件
		mTabHost.setOnTabChangedListener(this);
	}

	@Override
	public void onTabChanged(String arg0) {
		//从分割线中获得多少个切换界面
		TabWidget tabw = mTabHost.getTabWidget();
		for (int i = 0; i < tabw.getChildCount(); i++) {
			View v = tabw.getChildAt(i);
			TextView tv = (TextView) v.findViewById(R.id.foot_tv); 
			ImageView iv = (ImageView) v.findViewById(R.id.foot_iv);
			//修改当前的界面按钮颜色图片
			if (i == mTabHost.getCurrentTab()) {
				tv.setTextColor(getResources().getColor(R.color.tab_light_color));
				iv.setImageResource(TabDb.getTabsImgLight()[i]);
			}else{
				tv.setTextColor(getResources().getColor(R.color.tab_color));
				iv.setImageResource(TabDb.getTabsImg()[i]);
			}
		}
	}
}

其中TabDb类是用来设置导航栏的数据和图片切换时候的资源


以下是TabDb类

package com.gjn.mynavigation;

public class TabDb {
	/***
	 * 获得底部所有项
	 */
	public static String[] getTabsTxt() {
		String[] tabs = {"首页","交易","地点","我的"};
		return tabs;
	}
	/***
	 * 获得所有碎片
	 */
	public static Class[] getFramgent(){
		Class[] cls = {OneFm.class,TwoFm.class,ThreeFm.class,FourFm.class};
		return cls ;
	}
	/***
	 * 获得所有点击前的图片
	 */
	public static int[] getTabsImg(){
		int[] img = {R.drawable.home1,R.drawable.glod1,R.drawable.xc1,R.drawable.user1};
		return img ;
	}
	/***
	 * 获得所有点击后的图片
	 */
	public static int[] getTabsImgLight(){
		int[] img = {R.drawable.home2,R.drawable.glod2,R.drawable.xc2,R.drawable.user2};
		return img ;
	}
}

到此,底部导航栏就算是完全实现了。


--------------------------------------------------------------------------------------------------------------------------

现在来实现顶部导航栏,看了许多最后使用了RadioGroup+ViewPager来实现

首先是为第一个碎片设计一个xml布局

fm_one.xml


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <HorizontalScrollView
        android:id="@+id/one_hv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:scrollbars="none" >

        <RadioGroup
            android:id="@+id/one_rg"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal" >
        </RadioGroup>
    </HorizontalScrollView>

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

</LinearLayout>

设置顶部导航栏和显示view


之后吧导航栏的每个项的布局

tab_rb.xml


<?xml version="1.0" encoding="utf-8"?>
<RadioButton xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@drawable/tab_rb_selector"
    android:button="@null"
    android:paddingBottom="10dp"
    android:paddingLeft="15dp"
    android:paddingRight="15dp"
    android:paddingTop="10dp"
    android:text="今日" >
</RadioButton>

其中设置selector文件来控制点击和未点击的状态

tab_rb_selector.xml


<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    <!-- 点击 -->
    <item android:state_checked="true">
        <layer-list >
            <item >
                <shape android:shape="rectangle">
                    <stroke android:width="5dp" android:color="@color/tab_light_color"/>
                </shape>
            </item>
            <item android:bottom="5dp">
                <shape android:shape="rectangle">
                    <solid android:color="#fff"/>
                </shape>
            </item>
        </layer-list>
    </item>
	<!-- 默认 -->
	<item >
	    <shape >
            <solid android:color="#fafafa"/>
	    </shape>
	</item>
</selector>

设置了点击和默认的时候的显示状态


最后来实现OneFm类


package com.gjn.mynavigation;

import java.util.ArrayList;
import java.util.List;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.HorizontalScrollView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.LayoutParams;
import android.widget.RadioGroup.OnCheckedChangeListener;

public class OneFm extends Fragment implements OnPageChangeListener {

	private View view;
	private RadioGroup rg_;
	private ViewPager vp_;
	private HorizontalScrollView hv_;
	private List<Fragment> newsList = new ArrayList<Fragment>();
	private OneFmAdapter adapter;

	@Override
	public View onCreateView(LayoutInflater inflater,
			@Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
		if (view == null) {
			//初始化view
			view = inflater.inflate(R.layout.fm_one, container,false);
			rg_ = (RadioGroup) view.findViewById(R.id.one_rg);
			vp_ = (ViewPager) view.findViewById(R.id.one_view);
			hv_ = (HorizontalScrollView) view.findViewById(R.id.one_hv);
			//设置RadioGroup点击事件
			rg_.setOnCheckedChangeListener(new OnCheckedChangeListener() {
				
				@Override
				public void onCheckedChanged(RadioGroup group, int id) {
					vp_.setCurrentItem(id);
				}
			});
			//初始化顶部导航栏
			initTab(inflater);
			//初始化viewpager
			initView();
		}
		/*
		 * 底部导航栏切换后 由于没有销毁顶部设置导致如果没有重新设置view
		 * 导致底部切换后切回顶部页面数据会消失等bug
		 * 以下设置每次重新创建view即可
		*/
		ViewGroup parent = (ViewGroup) view.getParent();
		if (parent != null) {
			parent.removeView(view);
		}
		return view;
	}
	/***
	 * 初始化viewpager
	 */
	private void initView() {
		List<HTab> hTabs = HTabDb.getSelected();
		for (int i = 0; i < hTabs.size(); i++) {
			OneFm1 fm1 = new OneFm1();
			Bundle bundle = new Bundle();
			bundle.putString("name", hTabs.get(i).getName());
			fm1.setArguments(bundle);
			newsList.add(fm1);
		}
		//设置viewpager适配器
		adapter = new OneFmAdapter(getActivity().getSupportFragmentManager(),newsList);
		vp_.setAdapter(adapter);
		//两个viewpager切换不重新加载
		vp_.setOffscreenPageLimit(2);
		//设置默认
		vp_.setCurrentItem(0);
		//设置viewpager监听事件
		vp_.setOnPageChangeListener(this);
	}
	/***
	 * 初始化头部导航栏
	 * @param inflater
	 */
	private void initTab(LayoutInflater inflater) {
		List<HTab> hTabs = HTabDb.getSelected();
		for (int i = 0; i < hTabs.size(); i++) {
			//设置头部项布局初始化数据
			RadioButton rbButton  = (RadioButton) inflater.inflate(R.layout.tab_rb, null);
			rbButton.setId(i);
			rbButton.setText(hTabs.get(i).getName());
			LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT,
					LayoutParams.WRAP_CONTENT);
			//加入RadioGroup
			rg_.addView(rbButton,params);
		}
		//默认点击
		rg_.check(0);
	}
	@Override
	public void onPageScrollStateChanged(int arg0) {
		
	}
	@Override
	public void onPageScrolled(int arg0, float arg1, int arg2) {
		
	}
	@Override
	public void onPageSelected(int id) {
		setTab(id);
	}
	/***
	 * 页面跳转切换头部偏移设置
	 * @param id
	 */
	private void setTab(int id) {
		RadioButton rbButton = (RadioButton) rg_.getChildAt(id);
		//设置标题被点击
		rbButton.setChecked(true);
		//偏移设置
		int left = rbButton.getLeft();
		int width = rbButton.getMeasuredWidth();
		DisplayMetrics metrics = new DisplayMetrics();
		getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics);
		int screenWidth = metrics.widthPixels;
		//移动距离= 左边的位置 + button宽度的一半 - 屏幕宽度的一半
		int len = left + width / 2 - screenWidth / 2;
		//移动
		hv_.smoothScrollTo(len, 0);
	}
}

其中有两个数据类和一个碎片类

数据类

HTab.java


package com.gjn.mynavigation;

/***
 * 头部Tab属性
 *
 */
public class HTab {
	private String name;

	public HTab(String name) {
		super();
		this.setName(name);
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
	
}

HTabDb.java


package com.gjn.mynavigation;

import java.util.ArrayList;
import java.util.List;

public class HTabDb {
	private static final List<HTab> Selected = new ArrayList<HTab>();
	static{
		Selected.add(new HTab("今日"));
		Selected.add(new HTab("头条"));
		Selected.add(new HTab("娱乐"));
		Selected.add(new HTab("财经"));
		Selected.add(new HTab("军事"));
		Selected.add(new HTab("科技"));
		Selected.add(new HTab("时尚"));
		Selected.add(new HTab("体育"));
	}
	/***
	 * 获得头部tab的所有项
	 */
	public static List<HTab> getSelected() {
		return Selected;
	}

}

碎片类


OneFm1.java


package com.gjn.mynavigation;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class OneFm1 extends Fragment {

	private String name;

	@Override
	public void setArguments(Bundle args) {
		name = args.getString("name");
	}

	@Override
	public View onCreateView(LayoutInflater inflater,
			@Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
		View view = inflater.inflate(R.layout.fragment, container,false);
		((TextView) view.findViewById(R.id.fm_text)).setText(name);
		return view;
	}

}

这样就把顶部的导航栏加入到了第一个fragment里面并且实现了切换功能



最后把fragment.xml贴下,就是每个碎片最默认的显示页面罢了


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/fm_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge" />

</LinearLayout>



总结:

算是一个笔记记录吧!一段时间没更新了,由于刚毕业断了一个时间,走走停停留下一些自己的记录,就怕自己以后要写忘了。


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