Android学习笔记--欢迎界面的实现

项目文档结构

步骤一：布局

activity_guide.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="com.fch.android.guide.GuideActivity" >

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="@color/transparent" />

    <RadioGroup
        android:id="@+id/advertise_point_group"
        android:layout_width="fill_parent"
        android:layout_height="35dip"
        android:layout_alignParentBottom="true"
        android:gravity="center"
        android:orientation="horizontal"
        android:visibility="visible" >

        <RadioButton
            android:id="@+id/dot01"
            style="@style/dot_style"
            android:checked="true" />

        <RadioButton
            android:id="@+id/dot02"
            style="@style/dot_style"
            android:layout_marginLeft="10dip"
            android:checked="false" />

        <RadioButton
            android:id="@+id/dot03"
            style="@style/dot_style"
            android:layout_marginLeft="10dip"
            android:checked="false" />

        <RadioButton
            android:id="@+id/dot04"
            style="@style/dot_style"
            android:layout_marginLeft="10dip"
            android:checked="false" />
    </RadioGroup>



</RelativeLayout>

fragment1.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/guide1" >

</RelativeLayout>

fragment2.xml........ 与1 类似

步骤二：自定义ViewAdapter

package com.fch.android.adapter;

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

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;

 
public class ViewPagerAdapter extends FragmentPagerAdapter {

	private List<Fragment> fragmentList = new ArrayList<Fragment>();

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

	public ViewPagerAdapter(FragmentManager fragmentManager,
			List<Fragment> arrayList) {
		super(fragmentManager);
		this.fragmentList = arrayList;
	}

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

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

}

 步骤三：

package com.fch.android.fragment;

import com.fch.android.guide.R;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class Fragment1 extends Fragment {

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		super.onCreateView(inflater, container, savedInstanceState);
		return inflater.inflate(R.layout.fragment_1, container, false);
	}

}
.....

步骤四：

package com.fch.android.guide;

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

import com.fch.android.adapter.ViewPagerAdapter;
import com.fch.android.fragment.Fragment1;
import com.fch.android.fragment.Fragment2;
import com.fch.android.fragment.Fragment3;
import com.fch.android.fragment.Fragment4;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.widget.RadioButton;
import android.widget.RadioGroup;

/**
 * 
 * 引导页
 */
public class GuideActivity extends FragmentActivity {

	private ViewPager viewPage;
	private Fragment1 mFragment1;
	private Fragment2 mFragment2;
	private Fragment3 mFragment3;
	private Fragment4 mFragment4;
	private PagerAdapter mPgAdapter;
	private RadioGroup dotLayout;
	private List<Fragment> mListFragment = new ArrayList<Fragment>();

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_guide);

		initView();
		viewPage.setOnPageChangeListener(new MyPagerChangeListener());

	}

	private void initView() {
		dotLayout = (RadioGroup) findViewById(R.id.advertise_point_group);
		viewPage = (ViewPager) findViewById(R.id.viewpager);
		mFragment1 = new Fragment1();
		mFragment2 = new Fragment2();
		mFragment3 = new Fragment3();
		mFragment4 = new Fragment4();
		mListFragment.add(mFragment1);
		mListFragment.add(mFragment2);
		mListFragment.add(mFragment3);
		mListFragment.add(mFragment4);
		mPgAdapter = new ViewPagerAdapter(getSupportFragmentManager(),
				mListFragment);
		viewPage.setAdapter(mPgAdapter);

	}

	public class MyPagerChangeListener implements OnPageChangeListener {

		public void onPageSelected(int position) {

		}

		public void onPageScrollStateChanged(int arg0) {

		}

		public void onPageScrolled(int position, float positionOffset,
				int positionOffsetPixels) {
			((RadioButton) dotLayout.getChildAt(position)).setChecked(true);
		}

	}
}

运行效果截图：