Android Tab实现总结之Viewpager

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仅用ViewPager实现，下面的tab键用RadioGroup实现，在滑动的时候设置监听切换RadioButton的选中状态

布局代码

<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"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity">    <android.support.v4.view.ViewPager        android:id="@+id/vp"        android:layout_width="fill_parent"        android:layout_height="0dp"        android:layout_weight="1" />    <include layout="@layout/bottom_menu" /></LinearLayout>

底部布局代码:

<?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="wrap_content"    android:background="@android:color/darker_gray"    android:orientation="vertical">    <RadioGroup        android:id="@+id/rg_bottom"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:orientation="horizontal">        <RadioButton            android:id="@+id/rb_1"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:button="@null"            android:checked="false"            android:drawableTop="@mipmap/ic_launcher"            android:gravity="center"            android:padding="5dp"            android:text="item1"            android:textColor="@drawable/bottom_text_selector" />        <RadioButton            android:id="@+id/rb_2"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:button="@null"            android:checked="false"            android:drawableTop="@mipmap/ic_launcher"            android:gravity="center"            android:padding="5dp"            android:text="item2"            android:textColor="@drawable/bottom_text_selector" />        <RadioButton            android:id="@+id/rb_3"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:button="@null"            android:checked="false"            android:drawableTop="@mipmap/ic_launcher"            android:gravity="center"            android:padding="5dp"            android:text="item3"            android:textColor="@drawable/bottom_text_selector" />    </RadioGroup></LinearLayout>

实现代码：

package com.example.baidu.mydemos.demo1;import android.app.Activity;import android.os.Bundle;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.view.View;import android.view.ViewGroup;import android.widget.RadioGroup;import android.widget.TextView;import com.example.baidu.mydemos.R;import java.util.ArrayList;/** * Created by baidu on 15/12/24. */public class DemoOneMenuOneActivity extends Activity {    private ArrayList<View> views;    private TextView tv_content;    private RadioGroup rg_bottom;    private android.support.v4.view.ViewPager vp;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.demo1_1);        vp = (ViewPager) findViewById(R.id.vp);        rg_bottom = (RadioGroup) findViewById(R.id.rg_bottom);        initviews();        vp.setAdapter(new MyAdapter());        rg_bottom.check(R.id.rb_1);        rg_bottom.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(RadioGroup group, int checkedId) {                switch (checkedId) {                    case R.id.rb_1:                        vp.setCurrentItem(0);                        break;                    case R.id.rb_2:                        vp.setCurrentItem(1);                        break;                    case R.id.rb_3:                        vp.setCurrentItem(2);                        break;                }            }        });        vp.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {            @Override            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {            }            @Override            public void onPageSelected(int position) {                switch (position) {                    case 0:                        rg_bottom.check(R.id.rb_1);                        break;                    case 1:                        rg_bottom.check(R.id.rb_2);                        break;                    case 2:                        rg_bottom.check(R.id.rb_3);                        break;                }            }            @Override            public void onPageScrollStateChanged(int state) {            }        });    }    class MyAdapter extends PagerAdapter {        @Override        public int getCount() {            return views.size();        }        @Override        public Object instantiateItem(ViewGroup container, int position) {            View view = views.get(position);            container.addView(view);            return view;        }        @Override        public boolean isViewFromObject(View view, Object o) {            return view == o;        }        @Override        public void destroyItem(ViewGroup container, int position, Object object) {            container.removeView(views.get(position));        }    }    public void initviews() {        views = new ArrayList<View>();        for (int i = 1; i <= 3; i++) {            View view = View.inflate(DemoOneMenuOneActivity.this, R.layout.demo1_content, null);            tv_content = (TextView) view.findViewById(R.id.tv_content);            tv_content.setText(i + "");            views.add(view);        }    }}

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