首页 > 代码库 > 十八、Android引导界面
十八、Android引导界面
一、所需素材
很有必要整理一下,里面附带友盟的社会化分享组件，我就不去掉了。
二、代码
import com.umeng.update.UmengUpdateAgent;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
public class SplashActivity extends Activity {
private final int SPLASH_DISPLAY_LENGHT = 3000; // 延迟3秒
boolean isFirstIn = false;
private static final int GO_HOME = 1000;
private static final int GO_GUIDE = 1001;
private static final String SHAREDPREFERENCES_NAME = "first_pref";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
UmengUpdateAgent.update(this);
init();
}
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);
}
};
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(
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，3秒后执行跳转到MainActivity
mHandler.sendEmptyMessageDelayed(GO_HOME, SPLASH_DISPLAY_LENGHT);
} else {
mHandler.sendEmptyMessageDelayed(GO_GUIDE, SPLASH_DISPLAY_LENGHT);
// preferences.edit().putBoolean("isFirstIn",false).commit();
}
}
private void goGuide() {
Intent intent = new Intent(SplashActivity.this, GuideActivity.class);
SplashActivity.this.startActivity(intent);
SplashActivity.this.finish();
}
private void goHome() {
Intent intent = new Intent(SplashActivity.this, MainActivity.class);
SplashActivity.this.startActivity(intent);
SplashActivity.this.finish();
}
}
<?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"
android:background="@drawable/weather_bg"
android:orientation="vertical" >
</LinearLayout>
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
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.widget.ImageView;
import android.widget.LinearLayout;
public class GuideActivity extends Activity implements OnPageChangeListener {
private ViewPager vp;
private ViewPagerAdapter vpAdapter;
private List<View> views;
// 底部小点图片
private ImageView[] dots;
// 记录当前选中位置
private int currentIndex;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.guide);
// 初始化页面
initViews();
// 初始化底部小点
initDots();
}
private void initViews() {
/*
* LayoutInflater inflater = getLayoutInflater(); //调用Activity的getLayoutInflater()
* LayoutInflater localinflater = (LayoutInflater)context.getSystemService
(Context.LAYOUT_INFLATER_SERVICE); //最快
*/
LayoutInflater inflater = LayoutInflater.from(this);
views = new ArrayList<View>();
// 初始化引导图片列表
views.add(inflater.inflate(R.layout.what_new_one, null));
views.add(inflater.inflate(R.layout.what_new_two, null));
views.add(inflater.inflate(R.layout.what_new_three, null));
views.add(inflater.inflate(R.layout.what_new_four, null));
// 初始化Adapter
vpAdapter = new ViewPagerAdapter(views, this);
vp = (ViewPager) findViewById(R.id.viewpager);
vp.setAdapter(vpAdapter);
// 绑定回调
vp.setOnPageChangeListener(this);
}
private void initDots() {
LinearLayout ll = (LinearLayout) findViewById(R.id.ll);
dots = new ImageView[views.size()];
// 循环取得小点图片
for (int i = 0; i < views.size(); i++) {
dots[i] = (ImageView) ll.getChildAt(i);
dots[i].setEnabled(true);// 都设为灰色
}
currentIndex = 0;
dots[currentIndex].setEnabled(false);// 设置为白色，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;
}
// 当滑动状态改变时调用
@Override
public void onPageScrollStateChanged(int arg0) {
}
// 当当前页面被滑动时调用
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
// 当新的页面被选中时调用
@Override
public void onPageSelected(int arg0) {
// 设置底部小点选中状态
setCurrentDot(arg0);
}
}
<?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:orientation="vertical" >
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<LinearLayout
android:id="@+id/ll"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="24.0dp"
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" />
<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>
<?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>
一二三一样，第四个多一个开始按钮，下面只列举第一第四个
<?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" >
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:adjustViewBounds="false"
android:focusable="true"
android:scaleType="centerCrop"
android:background="@drawable/guide1" />
</RelativeLayout>
<?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" >
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:adjustViewBounds="false"
android:background="@drawable/guide4"
android:focusable="true"
android:scaleType="centerCrop" />
<ImageView
android:id="@+id/iv_start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="108dp"
android:background="@drawable/whats_new_start_btn"
android:focusable="true" />
</RelativeLayout>
package com.example.helloworld;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
public class ViewPagerAdapter extends PagerAdapter {
// 界面列表
private List<View> views;
private Activity activity;
private static final String SHAREDPREFERENCES_NAME = "first_pref";
public ViewPagerAdapter(List<View> views, Activity activity) {
this.views = views;
this.activity = activity;
}
// 销毁arg1位置的界面
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView(views.get(arg1));
}
@Override
public void finishUpdate(View arg0) {
}
// 获得当前界面数
@Override
public int getCount() {
if (views != null) {
return views.size();
}
return 0;
}
// 初始化arg1位置的界面
@Override
public Object instantiateItem(View arg0, int arg1) {
((ViewPager) arg0).addView(views.get(arg1), 0);
if (arg1 == views.size() - 1) {
ImageView mStartWeiboImageButton = (ImageView) arg0
.findViewById(R.id.iv_start);
mStartWeiboImageButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// 设置已经引导
setGuided();
goHome();
}
});
}
return views.get(arg1);
}
private void goHome() {
// 跳转
Intent intent = new Intent(activity, MainActivity.class);
activity.startActivity(intent);
activity.finish();
}
/**
*
* method desc：设置已经引导过了，下次启动不用再次引导
*/
private void setGuided() {
SharedPreferences preferences = activity.getSharedPreferences(
SHAREDPREFERENCES_NAME, Context.MODE_PRIVATE);
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 arg0, Object arg1) {
return (arg0 == arg1);
}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {
}
@Override
public Parcelable saveState() {
return null;
}
@Override
public void startUpdate(View arg0) {
}
}
<?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/butten_pressed" />
<item android:drawable="@drawable/butten_unpress" />
</selector>
声明：以上内容来自用户投稿及互联网公开渠道收集整理发布，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任，若内容有误或涉及侵权可进行投诉： 投诉/举报 工作人员会在5个工作日内联系你，一经查实，本站将立刻删除涉嫌侵权内容。