【移动应用开发技术】Android UI中如何实现应用程序只启动一次引导界面

【移动应用开发技术】AndroidUI中如何实现应用程序只启动一次引导界面

一、SharedPreferences的详细介绍和用法SharedPreferences介绍：SharedPreferences使用方法：二、实现的效果图

/upload/information/20200623/125/126609.jpg/upload/information/20200623/125/126610.jpg/upload/information/20200623/125/126611.jpg/upload/information/20200623/125/126612.png

/upload/information/20200623/125/126613.jpg/upload/information/20200623/125/126612.png三、程序的目录结构/upload/information/20200623/125/126614.jpg四、具体的实现编码<RelativeLayout

xmlns:android="/apk/res/android"

xmlns:tools="/tools"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

>

<android.support.v4.view.ViewPager

android:id="@+id/viewpager"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

/>

</RelativeLayout><?xml

version="1.0"

encoding="UTF-8"?>

<RelativeLayout

xmlns:android="/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:background="@drawable/star_img1"

android:orientation="vertical"

>

</RelativeLayout><?xml

version="1.0"

encoding="utf-8"?>

<LinearLayout

xmlns:android="/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical"

android:background="@drawable/welcome_background">

</LinearLayout><RelativeLayout

xmlns:android="/apk/res/android"

xmlns:tools="/tools"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

>

<TextView

android:id="@+id/textView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_alignParentTop="true"

android:text="欢迎来到主页面！"

android:textSize="25sp"/>

</RelativeLayout><?xml

version="1.0"

encoding="utf-8"?>

<selector

xmlns:android="/apk/res/android">

<item

android:state_enabled="true"

android:state_pressed="true"

android:drawable="@drawable/login_button_select"

/>

<!--按下时的效果-->

<item

android:state_enabled="true"

android:drawable="@drawable/login_button"

/>

<!--正常状态的效果-->

</selector>package

com.yangyu.myguideview04;

import

java.util.ArrayList;

import

android.support.v4.view.PagerAdapter;

import

android.support.v4.view.ViewPager;

import

android.view.View;

/**

*

@author

yangyu

*

功能描述：ViewPager适配器，用来绑定数据和view

*/

public

class

ViewPagerAdapter

extends

PagerAdapter

{

//界面列表

private

ArrayList<View>

views;

public

ViewPagerAdapter

(ArrayList<View>

views){

this.views

=

views;

}

/**

*

获得当前界面数

*/

@Override

public

int

getCount()

{

if

(views

!=

null)

{

return

views.size();

}

return

0;

}

/**

*

初始化position位置的界面

*/

@Override

public

Object

instantiateItem(View

view,

int

position)

{

((ViewPager)

view).addView(views.get(position),

0);

return

views.get(position);

}

/**

*

判断是否由对象生成界面

*/

@Override

public

boolean

isViewFromObject(View

view,

Object

arg1)

{

return

(view

==

arg1);

}

/**

*

销毁position位置的界面

*/

@Override

public

void

destroyItem(View

view,

int

position,

Object

arg2)

{

((ViewPager)

view).removeView(views.get(position));

}

}package

com.yangyu.myguideview04;

import

java.util.ArrayList;

import

android.app.Activity;

import

android.content.Intent;

import

android.os.Bundle;

import

android.support.v4.view.ViewPager;

import

android.support.v4.view.ViewPager.OnPageChangeListener;

import

android.view.LayoutInflater;

import

android.view.View;

import

android.view.View.OnClickListener;

import

android.widget.Button;

/**

*

@author

yangyu

*

功能描述：引导界面activity类

*/

public

class

GuideActivity

extends

Activity

implements

OnPageChangeListener{

//

定义ViewPager对象

private

ViewPager

viewPager;

//

定义ViewPager适配器

private

ViewPagerAdapter

vpAdapter;

//

定义一个ArrayList来存放View

private

ArrayList<View>

views;

//

定义各个界面View对象

private

View

view1,

view2,

view3,

view4;

//定义开始按钮对象

private

Button

startBt;

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_guide);

initView();

initData();

}

/**

*

初始化组件

*/

private

void

initView()

{

//实例化各个界面的布局对象

LayoutInflater

mLi

=

LayoutInflater.from(this);

view1

=

mLi.inflate(R.layout.guide_view01,

null);

view2

=

mLi.inflate(R.layout.guide_view02,

null);

view3

=

mLi.inflate(R.layout.guide_view03,

null);

view4

=

mLi.inflate(R.layout.guide_view04,

null);

//

实例化ViewPager

viewPager

=

(ViewPager)

findViewById(R.id.viewpager);

//

实例化ArrayList对象

views

=

new

ArrayList<View>();

//

实例化ViewPager适配器

vpAdapter

=

new

ViewPagerAdapter(views);

//实例化开始按钮

startBt

=

(Button)

view4.findViewById(R.id.startBtn);

}

/**

*

初始化数据

*/

private

void

initData()

{

//

设置监听

viewPager.setOnPageChangeListener(this);

//

设置适配器数据

viewPager.setAdapter(vpAdapter);

//将要分页显示的View装入数组中

views.add(view1);

views.add(view2);

views.add(view3);

views.add(view4);

//

给开始按钮设置监听

startBt.setOnClickListener(new

OnClickListener()

{

@Override

public

void

onClick(View

v)

{

startbutton();

}

});

}

@Override

public

void

onPageScrollStateChanged(int

arg0)

{

}

@Override

public

void

onPageScrolled(int

arg0,

float

arg1,

int

arg2)

{

}

@Override

public

void

onPageSelected(int

arg0)

{

}

/**

*

相应按钮点击事件

*/

private

void

startbutton()

{

Intent

intent

=

new

Intent();

intent.setClass(GuideActivity.this,MainActivity.class);

startActivity(intent);

this.finish();

}

｝package

com.yangyu.myguideview04;

import

android.app.Activity;

import

android.content.Intent;

import

android.content.SharedPreferences;

import

android.content.SharedPreferences.Editor;

import

android.os.Bundle;

/**

*

@author

yangyu

*

功能描述：欢迎界面

*/

public

class

Welcome

extends

Activity

implements

Runnable

{

//是否是第一次使用

private

boolean

isFirstUse;

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_welcome);

/**

*

启动一个延迟线程

*/

new

Thread(this).start();

}

public

void

run()

{

try

{

/**

*

延迟两秒时间

*/

Thread.sleep(2000);

//读取SharedPreferences中需要的数据

SharedPreferences

preferences

=

getSharedPreferences("isFirstUse",MODE_WORLD_READABLE);

isFirstUse

=

preferences.getBoolean("isFirstUse",

true);

/**

*如果用户不是第一次使用则直接调转到显示界面,否则调转到引导界面

*/

if