闪屏页+引导页

Posted 2020-08-09

实现原理：

用SharedPreferences实现。
创建一个boolean的变量，默认值为true。
当判断这个变量是true的时候，说明是第一次运行，就跳转到另一个引导页面，否则进入主页面。

引导页面跳转到最后一张图片时，点击某按钮发生跳转事件，回到MainActivity,此时把变量的值改成false。

引导图效果用ViewPager实现。

下面附上代码：

splash.xml:

<?xml version="1.0" encoding="utf-8"?>
<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.zn.Activity.SplashActivity">
        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:adjustViewBounds="true"
            android:background="@drawable/w01"
            android:scaleType="centerCrop" />

</RelativeLayout>

guid.xml:

<?xml version="1.0" encoding="utf-8"?>

<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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.zn.Activity.GuidActivity">
<android.support.v4.view.ViewPager
    android:id="@+id/guid_viewpager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true">
</android.support.v4.view.ViewPager>
    <LinearLayout
        android:id="@+id/viewgroup"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="38.0dp"
        android:orientation="horizontal">
        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:clickable="true"
            android:padding="15.0dip"
            android:src="@drawable/dot" />

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:clickable="true"
            android:padding="15.0dip"
            android:src="@drawable/dot" />

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:clickable="true"
            android:padding="15.0dip"
            android:src="@drawable/dot" />
    </LinearLayout>
</RelativeLayout>
引导页布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">
    <ImageView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_centerInParent="true"
        android:adjustViewBounds="false"
        android:focusable="true"
        android:scaleType="centerCrop"
        android:background="@drawable/guide01"/>
</LinearLayout>

闪屏页activity:

package com.zn.Activity;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Window;

/**
 * Created by admin on 2016/8/3.
 */
public class SplashActivity extends Activity {
    boolean isFirstIn = false;
    private static final int GO_HOME = 1000;
    private static final int GO_GUIDE = 1001;

    private static final long SPLASH_DELAY_MILLIS = 1000;
    private Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case GO_HOME:
                    goHome();
                    break;
                case GO_GUIDE:
                    goGuide();
                    break;
            }

            super.handleMessage(msg);
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);//去标题栏
        setContentView(R.layout.activity_splash);
        init();
    }

    private void init() {
        // 读取SharedPreferences中需要的数据
        // 使用SharedPreferences来记录程序的使用次数
        SharedPreferences preferences = getSharedPreferences(
                Icontes.SHAREDPREFERENCES_NAME, MODE_PRIVATE);

        // 取得相应的值，如果没有该值，说明还未写入，用true作为默认值
        isFirstIn = preferences.getBoolean("isFirstIn", true);
        // 判断程序与第几次运行，如果是第一次运行则跳转到引导界面，否则跳转到主界面
        if (!isFirstIn) {
            // 使用Handler的postDelayed方法，1秒后执行跳转到MainActivity
            mHandler.sendEmptyMessageDelayed(GO_HOME, SPLASH_DELAY_MILLIS);
        } else {
            mHandler.sendEmptyMessageDelayed(GO_GUIDE, SPLASH_DELAY_MILLIS);
        }

    }

    private void goHome() {
        Intent intent = new Intent(SplashActivity.this, MainActivity.class);
        SplashActivity.this.startActivity(intent);
        SplashActivity.this.finish();
    }

    private void goGuide() {
        Intent intent = new Intent(SplashActivity.this, GuidActivity.class);
        SplashActivity.this.startActivity(intent);
        SplashActivity.this.finish();
    }
}
引导页activity:

package com.zn.Activity;

import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;

import com.zn.Adapter.ViewPagerApter;

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

public class GuidActivity extends AppCompatActivity implements ViewPager.OnPageChangeListener{
    private ViewPager viewPager;
    private ViewPagerApter viewPagerApter;
    private List<View> views;

    //底部小圆点图片
    private ImageView[] dots;
    //记录当前选中的位置
    private int currentIndex;

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

        //初始化页面
        initViews();
        //初始化底部小圆点
        initDots();

    }

    private void initViews(){
        LayoutInflater inflater=LayoutInflater.from(this);
        views=new ArrayList<View>();
        //初始化引导页图片列表
        views.add(inflater.inflate(R.layout.layout_item1,null));
        views.add(inflater.inflate(R.layout.layout_item2,null));
        views.add(inflater.inflate(R.layout.layout_item5,null));

        //初始化Adapter
        viewPagerApter=new ViewPagerApter(views,this);

        viewPager= (ViewPager) findViewById(R.id.guid_viewpager);
        viewPager.setAdapter(viewPagerApter);
        //绑定回调
        viewPager.setOnPageChangeListener(this);


    }

    private void initDots(){
        LinearLayout linearLayout= (android.widget.LinearLayout) findViewById(R.id.viewgroup);
        dots=new ImageView[views.size()];

        //循环获取小点的图片
        for (int i=0;i<views.size();i++){
            dots[i]= (ImageView) linearLayout.getChildAt(i);
            dots[i].setEnabled(true);//

        }
        currentIndex=0;
        dots[currentIndex].setEnabled(false);//设为白色，即选中状态

    }

    private void setCurrentDot(int position){
        if (position<0||position>views.size()-1||currentIndex==position){
            return;

        }
        dots[position].setEnabled(false);
        dots[currentIndex].setEnabled(true);
        currentIndex=position;
    }

    //当前页面滑动时调用
    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

    }

    //当前页面选中时调用
    @Override
    public void onPageSelected(int position) {
        //设置底部小圆点选中状态
        setCurrentDot(position);

    }

    //滑动状态改变时调用
    @Override
    public void onPageScrollStateChanged(int state) {

    }
}
适配器：

package com.zn.Adapter;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import com.zn.Activity.Icontes;
import com.zn.Activity.MainActivity;
import com.zn.Activity.R;

import java.util.List;

/**
 * Created by admin on 2016/8/3.
 */
public class ViewPagerApter extends PagerAdapter {
    private List<View> views;
    private Activity activity;


    public ViewPagerApter(List<View> views, Activity activity) {
        this.views = views;
        this.activity = activity;
    }

    //销毁position位置的界面
    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        ((ViewPager) container).removeView(views.get(position));
    }

    //获得当前的页面数
    @Override
    public int getCount() {
        if (views != null) {
            return views.size();
        }
        return 0;
    }

    @Override
    public void finishUpdate(ViewGroup container) {

    }

    //初始化position的界面
    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        ((ViewPager) container).addView(views.get(position), 0);
        if (position == views.size() - 1) {
            ImageView mStartWeiboImageButton = (ImageView) container.findViewById(R.id.iv_start_weibo);
            mStartWeiboImageButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    //设置已经引导
                    setGuided();
                    SharedPreferences preferences = activity.getSharedPreferences(
                            Icontes.SHAREDPREFERENCES_NAME, Context.MODE_PRIVATE);
                    SharedPreferences.Editor editor = preferences.edit();
                    editor.putBoolean("isFirstIn", false);
                    editor.commit();
                    goHome();
                }
            });
        }
        return views.get(position);
    }

    private void goHome() {
        //跳转
        Intent intent = new Intent(activity, MainActivity.class);
        activity.startActivity(intent);
        activity.finish();
    }

    private void setGuided() {
        SharedPreferences preferences = activity.getSharedPreferences(Icontes.SHAREDPREFERENCES_NAME, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = preferences.edit();
        //存入数据
        editor.putBoolean("isFirstIn", false);
        //提交修改
        editor.commit();
    }

    //判断是否由对象生成界面
    @Override
    public boolean isViewFromObject(View view, Object object) {
        return (view == object);
    }

    @Override
    public void restoreState(Parcelable state, ClassLoader loader) {

    }

    @Override
    public Parcelable saveState() {
        return null;
    }

    @Override
    public void startUpdate(ViewGroup container) {


    }
}小圆点xml:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/dark_dot" android:state_enabled="true"/>
    <item android:drawable="@drawable/white_dot" android:state_enabled="false"/>

</selector>

开始体验按钮：

<?xml version="1.0" encoding="utf-8"?>
<selector
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" android:drawable="@drawable/tiyan" />
    <item android:drawable="@drawable/tiyan" />
</selector>