功能需求:首次進入應用時加載引導界面html
思路:java
一、首次進入,怎麼判斷?查看SharedPreferences中某個字段android
二、基本上每一個應用都有個進入實際功能是的動畫加載頁面,咱們能夠在該Activity中加入判斷,看是否須要跳轉到引導Activity數組
三、引導界面,採用如今比較主流的方式:左右滑動加載;小圓點提示;在最後一個頁面,點擊button,進入功能界面app
實現功能:左右手勢滑屏ide
底部小圓點隨當前顯示頁跳動佈局
浮動按鈕顯示。當觸屏事件發生顯示,不然就漸漸消失測試
第一種: ViewFlipper + GestureDetector動畫
第二種: ActivityGroup + GestureDetectorui
第三種: ViewPager (Android3.0+)
第四種: ViewFlow (開源項目)
當你須要在一系列不肯定數目的view中滑動時,能夠考慮使用ViewFlow。若是你的view數目肯定,你應該使用Fragments 或兼容庫裏的ViewPager 。
綜合考慮代碼複雜度以及以及加載的引導view個數可肯定性,咱們就採用第三種方案ViewPager。
(1)修改應用的動畫加載頁面SplashActivity.java
package com.example.guidepagetest2; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.os.Message; /** * 功能:使用ViewPager實現初次進入應用時的引導頁 * * (1)判斷是不是首次加載應用--採起讀取SharedPreferences的方法 * (2)是,則進入引導activity;否,則進入MainActivity * (3)5s後執行(2)操做 * * @author sz082093 * */ public class SplashActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_splash); boolean mFirst = isFirstEnter(SplashActivity.this,SplashActivity.this.getClass().getName()); if(mFirst) mHandler.sendEmptyMessageDelayed(SWITCH_GUIDACTIVITY,5000); else mHandler.sendEmptyMessageDelayed(SWITCH_MAINACTIVITY,5000); } //**************************************************************** // 判斷應用是否初次加載,讀取SharedPreferences中的guide_activity字段 //**************************************************************** private static final String SHAREDPREFERENCES_NAME = "my_pref"; private static final String KEY_GUIDE_ACTIVITY = "guide_activity"; private boolean isFirstEnter(Context context,String className){ if(context==null || className==null||"".equalsIgnoreCase(className))return false; String mResultStr = context.getSharedPreferences(SHAREDPREFERENCES_NAME, Context.MODE_WORLD_READABLE) .getString(KEY_GUIDE_ACTIVITY, "");//取得全部類名 如 com.my.MainActivity if(mResultStr.equalsIgnoreCase("false")) return false; else return true; } //************************************************* // Handler:跳轉至不一樣頁面 //************************************************* private final static int SWITCH_MAINACTIVITY = 1000; private final static int SWITCH_GUIDACTIVITY = 1001; public Handler mHandler = new Handler(){ public void handleMessage(Message msg) { switch(msg.what){ case SWITCH_MAINACTIVITY: Intent mIntent = new Intent(); mIntent.setClass(SplashActivity.this, MainActivity.class); SplashActivity.this.startActivity(mIntent); SplashActivity.this.finish(); break; case SWITCH_GUIDACTIVITY: mIntent = new Intent(); mIntent.setClass(SplashActivity.this, GuideActivity.class); SplashActivity.this.startActivity(mIntent); SplashActivity.this.finish(); break; } super.handleMessage(msg); } };
(2)添加引導Activity的佈局文件activity_guide.xml
<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <LinearLayout android:id="@+id/linearLayout1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical"> <android.support.v4.view.ViewPager android:id="@+id/guidePages" android:layout_width="fill_parent" android:layout_height="wrap_content"/> </LinearLayout> <LinearLayout android:id="@+id/linearLayout2" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical"> <RelativeLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical"> <LinearLayout android:id="@+id/viewGroup" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginBottom="40dp" android:gravity="center_horizontal" android:orientation="horizontal"> </LinearLayout> </RelativeLayout> </LinearLayout> </FrameLayout>
(3)添加引導時,左右滑動時的view,這裏示例兩個:
viewpager_page1.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" android:orientation="vertical"> <TextView android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_gravity="center" android:text="@string/guide_begin" /> </LinearLayout>
viewpager_page2.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" android:orientation="vertical" android:gravity="center"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/guide_end"/> <Button android:id="@+id/btn_close_guide" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/btn_close_guide"/> </LinearLayout>
(4)修改引導Activity:GuideActivity.java
package com.example.guidepagetest2; import java.util.ArrayList; import android.app.Activity; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.os.Parcelable; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.widget.Button; import android.widget.ImageView; public class GuideActivity extends Activity { private ViewPager viewPager; /**裝分頁顯示的view的數組*/ private ArrayList<View> pageViews; private ImageView imageView; /**將小圓點的圖片用數組表示*/ private ImageView[] imageViews; //包裹滑動圖片的LinearLayout private ViewGroup viewPics; //包裹小圓點的LinearLayout private ViewGroup viewPoints; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //將要分頁顯示的View裝入數組中 LayoutInflater inflater = getLayoutInflater(); pageViews = new ArrayList<View>(); pageViews.add(inflater.inflate(R.layout.viewpager_page1, null)); pageViews.add(inflater.inflate(R.layout.viewpager_page2, null)); //建立imageviews數組,大小是要顯示的圖片的數量 imageViews = new ImageView[pageViews.size()]; //從指定的XML文件加載視圖 viewPics = (ViewGroup) inflater.inflate(R.layout.activity_guide, null); //實例化小圓點的linearLayout和viewpager viewPoints = (ViewGroup) viewPics.findViewById(R.id.viewGroup); viewPager = (ViewPager) viewPics.findViewById(R.id.guidePages); //添加小圓點的圖片 for(int i=0;i<pageViews.size();i++){ imageView = new ImageView(GuideActivity.this); //設置小圓點imageview的參數 imageView.setLayoutParams(new LayoutParams(20,20));//建立一個寬高均爲20 的佈局 imageView.setPadding(20, 0, 20, 0); //將小圓點layout添加到數組中 imageViews[i] = imageView; //默認選中的是第一張圖片,此時第一個小圓點是選中狀態,其餘不是 if(i==0){ imageViews[i].setBackgroundResource(R.drawable.page_indicator_focused); }else{ imageViews[i].setBackgroundResource(R.drawable.page_indicator); } //將imageviews添加到小圓點視圖組 viewPoints.addView(imageViews[i]); } //顯示滑動圖片的視圖 setContentView(viewPics); //設置viewpager的適配器和監聽事件 viewPager.setAdapter(new GuidePageAdapter()); viewPager.setOnPageChangeListener(new GuidePageChangeListener()); } private Button.OnClickListener Button_OnClickListener = new Button.OnClickListener() { public void onClick(View v) { //設置已經引導 setGuided(); //跳轉 Intent mIntent = new Intent(); mIntent.setClass(GuideActivity.this, MainActivity.class); GuideActivity.this.startActivity(mIntent); GuideActivity.this.finish(); } }; private static final String SHAREDPREFERENCES_NAME = "my_pref"; private static final String KEY_GUIDE_ACTIVITY = "guide_activity"; private void setGuided(){ SharedPreferences settings = getSharedPreferences(SHAREDPREFERENCES_NAME, 0); SharedPreferences.Editor editor = settings.edit(); editor.putString(KEY_GUIDE_ACTIVITY, "false"); editor.commit(); } class GuidePageAdapter extends PagerAdapter{ //銷燬position位置的界面 @Override public void destroyItem(View v, int position, Object arg2) { // TODO Auto-generated method stub ((ViewPager)v).removeView(pageViews.get(position)); } @Override public void finishUpdate(View arg0) { // TODO Auto-generated method stub } //獲取當前窗體界面數 @Override public int getCount() { // TODO Auto-generated method stub return pageViews.size(); } //初始化position位置的界面 @Override public Object instantiateItem(View v, int position) { // TODO Auto-generated method stub ((ViewPager) v).addView(pageViews.get(position)); // 測試頁卡1內的按鈕事件 if (position == 1) { Button btn = (Button) v.findViewById(R.id.btn_close_guide); btn.setOnClickListener(Button_OnClickListener); } return pageViews.get(position); } // 判斷是否由對象生成界面 @Override public boolean isViewFromObject(View v, Object arg1) { // TODO Auto-generated method stub return v == arg1; } @Override public void startUpdate(View arg0) { // TODO Auto-generated method stub } @Override public int getItemPosition(Object object) { // TODO Auto-generated method stub return super.getItemPosition(object); } @Override public void restoreState(Parcelable arg0, ClassLoader arg1) { // TODO Auto-generated method stub } @Override public Parcelable saveState() { // TODO Auto-generated method stub return null; } } class GuidePageChangeListener implements OnPageChangeListener{ @Override public void onPageScrollStateChanged(int arg0) { // TODO Auto-generated method stub } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { // TODO Auto-generated method stub } @Override public void onPageSelected(int position) { // TODO Auto-generated method stub for(int i=0;i<imageViews.length;i++){ imageViews[position].setBackgroundResource(R.drawable.page_indicator_focused); //不是當前選中的page,其小圓點設置爲未選中的狀態 if(position !=i){ imageViews[i].setBackgroundResource(R.drawable.page_indicator); } } } } }
動畫加載頁面:
引導頁面:
點擊「關閉引導界面」或者非首次進入應用後的功能頁面: