ViewPager和FragmentPagerAdapter
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该代码来源于 慕课 网 学习视频:
MainActivity.class
package com.imooc.tab03;import java.util.ArrayList;import java.util.List;import android.os.Bundle;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentActivity;import android.support.v4.app.FragmentPagerAdapter;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.widget.ImageButton;import android.widget.LinearLayout;public class MainActivity extends FragmentActivity implements OnClickListener{ private ViewPager mViewPager; private FragmentPagerAdapter mAdapter; private List<Fragment> mFragments; private LinearLayout mTabWeixin; private LinearLayout mTabFrd; private LinearLayout mTabAddress; private LinearLayout mTabSettings; private ImageButton mImgWeixin; private ImageButton mImgFrd; private ImageButton mImgAddress; private ImageButton mImgSettings; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_main); initView(); initEvent(); setSelect(1); } private void initEvent() { mTabWeixin.setOnClickListener(this); mTabFrd.setOnClickListener(this); mTabAddress.setOnClickListener(this); mTabSettings.setOnClickListener(this); } private void initView() { mViewPager = (ViewPager) findViewById(R.id.id_viewpager); mTabWeixin = (LinearLayout) findViewById(R.id.id_tab_weixin); mTabFrd = (LinearLayout) findViewById(R.id.id_tab_frd); mTabAddress = (LinearLayout) findViewById(R.id.id_tab_address); mTabSettings = (LinearLayout) findViewById(R.id.id_tab_settings); mImgWeixin = (ImageButton) findViewById(R.id.id_tab_weixin_img); mImgFrd = (ImageButton) findViewById(R.id.id_tab_frd_img); mImgAddress = (ImageButton) findViewById(R.id.id_tab_address_img); mImgSettings = (ImageButton) findViewById(R.id.id_tab_settings_img); mFragments = new ArrayList<Fragment>(); Fragment mTab01 = new WeixinFragment(); Fragment mTab02 = new FrdFragment(); Fragment mTab03 = new AddressFragment(); Fragment mTab04 = new SettingFragment(); mFragments.add(mTab01); mFragments.add(mTab02); mFragments.add(mTab03); mFragments.add(mTab04); mAdapter = new FragmentPagerAdapter(getSupportFragmentManager()) { @Override public int getCount() { return mFragments.size(); } @Override public Fragment getItem(int arg0) { return mFragments.get(arg0); } }; mViewPager.setAdapter(mAdapter); mViewPager.setOnPageChangeListener(new OnPageChangeListener() { @Override public void onPageSelected(int arg0) { int currentItem = mViewPager.getCurrentItem(); setTab(currentItem); } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { // TODO Auto-generated method stub } @Override public void onPageScrollStateChanged(int arg0) { // TODO Auto-generated method stub } }); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.id_tab_weixin: setSelect(0); break; case R.id.id_tab_frd: setSelect(1); break; case R.id.id_tab_address: setSelect(2); break; case R.id.id_tab_settings: setSelect(3); break; default: break; } } private void setSelect(int i) { setTab(i); mViewPager.setCurrentItem(i); } private void setTab(int i) { resetImgs(); // 设置图片为亮色 // 切换内容区域 switch (i) { case 0: mImgWeixin.setImageResource(R.drawable.tab_weixin_pressed); break; case 1: mImgFrd.setImageResource(R.drawable.tab_find_frd_pressed); break; case 2: mImgAddress.setImageResource(R.drawable.tab_address_pressed); break; case 3: mImgSettings.setImageResource(R.drawable.tab_settings_pressed); break; } } /** * 切换图片至暗色 */ private void resetImgs() { mImgWeixin.setImageResource(R.drawable.tab_weixin_normal); mImgFrd.setImageResource(R.drawable.tab_find_frd_normal); mImgAddress.setImageResource(R.drawable.tab_address_normal); mImgSettings.setImageResource(R.drawable.tab_settings_normal); }}
activity_main.xml
<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" > <include layout="@layout/top" /> <android.support.v4.view.ViewPager android:id="@+id/id_viewpager" android:layout_width="fill_parent" android:layout_height="0dp" android:layout_weight="1" > </android.support.v4.view.ViewPager> <include layout="@layout/bottom" /></LinearLayout>
top.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="45dp" android:background="@drawable/title_bar" android:gravity="center" android:orientation="vertical" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:text="微信" android:textColor="#ffffff" android:textSize="20sp" android:textStyle="bold" /></LinearLayout>
buttom.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="55dp" android:background="@drawable/bottom_bar" android:orientation="horizontal" > <LinearLayout android:id="@+id/id_tab_weixin" android:layout_width="0dp" android:layout_height="fill_parent" android:layout_weight="1" android:gravity="center" android:orientation="vertical" > <ImageButton android:id="@+id/id_tab_weixin_img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="#00000000" android:clickable="false" android:src="@drawable/tab_weixin_pressed" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="微信" android:textColor="#ffffff" /> </LinearLayout> <LinearLayout android:id="@+id/id_tab_frd" android:layout_width="0dp" android:layout_height="fill_parent" android:layout_weight="1" android:gravity="center" android:orientation="vertical" > <ImageButton android:id="@+id/id_tab_frd_img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="#00000000" android:clickable="false" android:src="@drawable/tab_find_frd_normal" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="朋友" android:textColor="#ffffff" /> </LinearLayout> <LinearLayout android:id="@+id/id_tab_address" android:layout_width="0dp" android:layout_height="fill_parent" android:layout_weight="1" android:gravity="center" android:orientation="vertical" > <ImageButton android:id="@+id/id_tab_address_img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="#00000000" android:clickable="false" android:src="@drawable/tab_address_normal" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="通讯录" android:textColor="#ffffff" /> </LinearLayout> <LinearLayout android:id="@+id/id_tab_settings" android:layout_width="0dp" android:layout_height="fill_parent" android:layout_weight="1" android:gravity="center" android:orientation="vertical" > <ImageButton android:id="@+id/id_tab_settings_img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="#00000000" android:clickable="false" android:src="@drawable/tab_settings_normal" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="设置" android:textColor="#ffffff" /> </LinearLayout></LinearLayout>
四个相同的Fragment:::
WeixinFragment
new FrdFragment
AddressFragment
SettingFragment
public class AddressFragment extends Fragment{ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.tab03, container, false); }}
四个相同的top0.xml
Fragment mTab01 = new WeixinFragment(); Fragment mTab02 = new FrdFragment(); Fragment mTab03 = new AddressFragment(); Fragment mTab04 = new SettingFragment();
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