【转】Android之应用首次使用的欢迎界面实例
主要代码package com.chinaideal.bkclient.tabmain;import java.util.ArrayList;
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.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver.OnPreDrawListener;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
public class WelComeActivity extends Activity {
// 首次使用程序的显示的欢迎图片
private int[] ids = { R.drawable.webcom_frist_image,
R.drawable.webcom_two_image, R.drawable.webcom_three_image,
R.drawable.niwodai_welcom };
SharedPreferences share;
private List<View> guides = new ArrayList<View>();
private ViewPager pager;
private ImageView curDot;
// 位移量
private int offset;
// 记录当前的位置
private int curPos = 0;
Editor editor;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
share = getSharedPreferences("showWelcomm", Context.MODE_PRIVATE);
editor = share.edit();
// 判断是否首次登录程序
if (share.contains("shownum")) {
setContentView(R.layout.welcomniwo);
int num = share.getInt("shownum", 0);
editor.putInt("shownum", num++);
editor.commit();
skipActivity(1);
} else {
editor.putInt("shownum", 1);
editor.commit();
setContentView(R.layout.welcometabx);
initView();
}
}
private void initView() {
for (int i = 0; i < ids.length; i++) {
ImageView iv = new ImageView(this);
iv.setImageResource(ids);
ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT);
iv.setLayoutParams(params);
iv.setScaleType(ScaleType.FIT_XY);
guides.add(iv);
}
curDot = (ImageView) findViewById(R.id.cur_dot);
curDot.getViewTreeObserver().addOnPreDrawListener(
new OnPreDrawListener() {
public boolean onPreDraw() {
offset = curDot.getWidth();
return true;
}
});
WecommPagerAdapter adapter = new WecommPagerAdapter(guides);
pager = (ViewPager) findViewById(R.id.showwelom_page);
pager.setAdapter(adapter);
pager.setOnPageChangeListener(new OnPageChangeListener() {
public void onPageSelected(int arg0) {
moveCursorTo(arg0);
if (arg0 == ids.length - 1) {// 到最后一张了
skipActivity(2);
}
curPos = arg0;
}
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
public void onPageScrollStateChanged(int arg0) {
}
});
}
/**
* 移动指针到相邻的位置
*
* @param position
* 指针的索引值
* */
private void moveCursorTo(int position) {
TranslateAnimation anim = new TranslateAnimation(offset * curPos,
offset * position, 0, 0);
anim.setDuration(300);
anim.setFillAfter(true);
curDot.startAnimation(anim);
}
/**
* 延迟多少秒进入主界面
* @param min 秒
*/
private void skipActivity(int min) {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
Intent intent = new Intent(WelComeActivity.this,
TabHostMain.class);
startActivity(intent);
WelComeActivity.this.finish();
}
}, 1000*min);
}
}
public class WecommPagerAdapter extends PagerAdapter{
private List<View> views;
public GuidePagerAdapter(List<View> views){
this.views=views;
}
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView(views.get(arg1));
}
@Override
public void finishUpdate(View arg0) {
}
@Override
public int getCount() {
return views.size();
}
@Override
public Object instantiateItem(View arg0, int arg1) {
((ViewPager) arg0).addView(views.get(arg1), 0);
return views.get(arg1);
}
@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) {
}
}布局文件<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<android.support.v4.view.ViewPager
android:id="@+id/showwelom_page"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center"
android:flipInterval="30"
android:persistentDrawingCache="animation" />
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:gravity="center"
android:paddingBottom="22.0dip">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1.0"
android:src="@drawable/dot1_w" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1.0"
android:src="@drawable/dot1_w" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1.0"
android:src="@drawable/dot1_w" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1.0"
android:src="@drawable/dot1_w" />
</LinearLayout>
<ImageView
android:id="@+id/cur_dot"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/dot2_w" />
</FrameLayout>
</RelativeLayout> 也可以自己定义 fragment
例如
主要代码片段private void initView() {
boolean isShow = false;
for (int i = 0; i < ids.length; i++) {
if (i == ids.length - 1) {
isShow = true;
}else {
isShow = false;
}
GuideFragment guideFragment = new GuideFragment(ids,isShow);
guides.add(guideFragment);
}
viewPager = (ViewPager) findViewById(R.id.pagerGuide);
viewPager.setAdapter(new WelcomePagerAdapter(getSupportFragmentManager(),guides));
}GuideFragment 类代码片段public class GuideFragment extends Fragment {
// private static final String TAG = "GuideFragment";
private Button startBtn;
private int guideId;
private boolean isShow;
public GuideFragment(int guideId,boolean isShow){
this.guideId = guideId;
this.isShow = isShow;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View guideView = (View) inflater.inflate(R.layout.fragment_guide, container, false);
startBtn = (Button) guideView.findViewById(R.id.start_btn);
final ImageView guideImage = (ImageView)guideView.findViewById(R.id.image_guide);
guideImage.setImageResource(guideId);
guideImage.setBackgroundColor(Color.parseColor("#f4f8fb"));
if (isShow) {
startBtn.setVisibility(View.VISIBLE);
startBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
CommonUtil.saveSharedPrefrences(AppConst.SAVE_WELCOME, 1 + "");
guideImage.setImageResource(R.drawable.splash_default);
guideImage.setBackgroundColor(Color.parseColor("#fbf9ef"));
//最好一页点击的时候打开主activity界面
}
});
}else {
startBtn.setVisibility(View.GONE);
}
return guideView;
}fragment_guide<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center" >
<ImageView
android:id="@+id/image_guide"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_centerInParent="true"
android:background="@drawable/splash_default"
android:contentDescription="@null"
android:scaleType="centerInside" />
<Button
android:id="@+id/start_btn"
style="@style/Button.Orange"
android:layout_width="fill_parent"
android:layout_height="200dip"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="5dip"
android:layout_marginLeft="40dip"
android:layout_marginRight="40dip"
android:background="#00ffffff" />
</RelativeLayout>
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