ViewPager实现引导页(添加导航点,判断是否第一次进入主界面)

1.引导页的4个界面布局,里面加载一张背景图片

插入到guide的界面布局中(这里不用fragment)

guide_background_fragment1.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"
    >
<ImageView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/guide_background1"/>
</LinearLayout>

guide_background_fragment2.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"
    >
<ImageView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/guide_background2"/>
</LinearLayout>

guide_background_fragment3.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"
    >
<ImageView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/guide_background3"/>
</LinearLayout>

guide_background_fragment4.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"
    >
<ImageView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/guide_background4"/>
</LinearLayout>

guide.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.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center" />
 
    <LinearLayout
        android:id="@+id/l1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_centerInParent="true"
        android:layout_alignParentBottom="true"
        >
 
        <ImageView
            android:id="@+id/imageV1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/login_point" />
 
        <ImageView
            android:id="@+id/imageV2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/login_point" />
 
        <ImageView
            android:id="@+id/imageV3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/login_point" />
        <ImageView
            android:id="@+id/imageV4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/login_point" />
    </LinearLayout>
</RelativeLayout>

2.    适配器

GuidePagerAdapter.java

import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
 
import java.util.List;
 
public class GuidePagerAdapter extends PagerAdapter{
    private Context context;
    private List<View> views;
    public GuidePagerAdapter(List<View> views, Context context) {
        this.context = context;
        this.views = views;
 
    }
    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return views.size();
    }
    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        container.addView(views.get(position));
        return views.get(position);
    }
    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView(views.get(position));
    }
    @Override
    public boolean isViewFromObject(View arg0, Object arg1) {
        // TODO Auto-generated method stub
        return (arg0 == arg1);
    }
 
}

Guide.java

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.ImageView;
 
import java.util.ArrayList;
import java.util.List;
 
/**
 * Created by zps on 2015/9/3.
 */
public class Guide extends Activity implements ViewPager.OnPageChangeListener {
 
    private List<View> listView;
    private ViewPager viewPager;
    private GuidePagerAdapter vpAdapter;
    private int[] dotsId = {R.id.imageV1, R.id.imageV2, R.id.imageV3, R.id.imageV4};
    private ImageView[] dotsView;
    private Button lijitiyanButton;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.view_pager);
        init();
        initDots();
 
    }
 
    private void initDots() {
        dotsView = new ImageView[listView.size()];
        for (int i = 0; i < listView.size(); i++) {
            dotsView[i] = (ImageView) findViewById(dotsId[i]);
        }
 
    }
 
    private void init() {
 
        LayoutInflater inflater = LayoutInflater.from(this);
        listView = new ArrayList<View>();
        //获取View对象
        View view1 = inflater.inflate(R.layout.view_pager_img1, null);
        View view2 = inflater.inflate(R.layout.view_pager_img2, null);
        View view3 = inflater.inflate(R.layout.view_pager_img3, null);
        View view4 = inflater.inflate(R.layout.view_pager_img4, null);
 
        //view对象放在List<view>中
        listView.add(view1);
        listView.add(view2);
        listView.add(view3);
        listView.add(view4);
        //List<view>放在适配器ViewPagerAdapter中
        vpAdapter = new GuidePagerAdapter(listView, this);
        //获取ViewPage,设置适配器;
        viewPager = (ViewPager) findViewById(R.id.viewpager);
        viewPager.setAdapter(vpAdapter);
        viewPager.addOnPageChangeListener(this);
        lijitiyanButton =(Button) view4.findViewById(R.id.lijitiyan_button);
        lijitiyanButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Guide.this,MainActivity.class);
                startActivity(intent);
                finish();
 
            }
        });
 
    }
 
    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 
    }
 
    @Override
    public void onPageSelected(int position) {
        for (int i = 0; i < dotsId.length; i++) {
            if(i == position){
                dotsView[i].setImageResource(R.drawable.login_point_selected);
            }else {
                dotsView[i].setImageResource(R.drawable.login_point);
            }
        }
 
    }
 
    @Override
    public void onPageScrollStateChanged(int state) {
 
    }
}

3.引导页的判断:是否第一次进入

public class GuideWelcome extends Activity{
    private static final int TIME = 2000;
    private static boolean isFirstIn = false;
    private static final  int First = 1000;
    private static final  int NoFirst = 1001;
    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what){
                case First:
                    FirstIn();
                    break;
                case NoFirst:
                    NoFirstIn();
                    break;
                default:
                    break;
            }
        }
 
    };
 
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.welcome);
        init();
    }
 
    private void init() {
        //存储文件名为"gudiewelcome"
        SharedPreferences sharedPreferences = getSharedPreferences("guidewelcome",MODE_PRIVATE);
 
        isFirstIn = sharedPreferences.getBoolean("isFirstIn",true);
        if(!isFirstIn){
          handler.sendEmptyMessageDelayed(NoFirst,TIME);
        }else {
            handler.sendEmptyMessageDelayed(First,TIME);
            //存储文件key为isFirstIn,值为false
            SharedPreferences.Editor editor = sharedPreferences.edit();
            editor.putBoolean("isFirstIn",false);
            editor.commit();
        }
 
    }
    private void FirstIn(){
        Intent intent = new Intent(GuideWelcome.this,Guide.class);
        startActivity(intent);
        finish();
 
    }
    private void NoFirstIn(){
        Intent intent = new Intent(GuideWelcome.this,TabMainActivity.class);
        startActivity(intent);
        finish();
    }
 
}