安卓引導頁的簡單實現
阿新 • • 發佈：2019-01-03
ViewPager實現的引導頁，供大家參考，具體內容如下：
先看效果圖：
具體程式碼如下：
佈局檔案activity_guide.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=".GuideActivity"> <android.support.v4.view.ViewPager android:id="@+id/guide_vp" android:layout_width="match_parent" android:layout_height="match_parent"/> <LinearLayout android:id="@+id/guide_ll_point" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginBottom="40dp" android:gravity="center_horizontal" android:orientation="horizontal"/> <ImageButton android:id="@+id/guide_ib_start" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/guide_ll_point" android:layout_centerHorizontal="true" android:layout_marginBottom="15dp" android:background="@null" android:src="@drawable/start3" android:visibility="gone" /> </RelativeLayout>
介面卡GuidePageAdapter.java類：
package com.hykjsjkj.guidepagerdemo; import android.support.v4.view.PagerAdapter; import android.view.View; import android.view.ViewGroup; import java.util.List; /** * Copyright: Copyright (c) 2017-2025 * Company: * * @author: 趙小賤() * @date: 2017/10/18 * describe: */ public class GuidePageAdapter extends PagerAdapter { private List<View> viewList; public GuidePageAdapter(List<View> viewList) { this.viewList = viewList; } /** * @return 返回頁面的個數 */ @Override public int getCount() { if (viewList != null){ return viewList.size(); } return 0; } /** * 判斷物件是否生成介面 * @param view * @param object * @return */ @Override public boolean isViewFromObject(View view, Object object) { return view == object; } /** * 初始化position位置的介面 * @param container * @param position * @return */ @Override public Object instantiateItem(ViewGroup container, int position) { container.addView(viewList.get(position)); return viewList.get(position); } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView(viewList.get(position)); } }
引導頁面的活動類：GuideActivity.java
package com.hykjsjkj.guidepagerdemo; import android.content.Intent; import android.os.Bundle; import android.support.v4.view.ViewPager; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.LinearLayout; import java.util.ArrayList; import java.util.List; /** * Copyright: Copyright (c) 2017-2025 * Company: * 實現首次啟動的引導頁面 * @author: 趙小賤() * @date: 2017/10/18 * describe: */ public class GuideActivity extends AppCompatActivity implements ViewPager.OnPageChangeListener{ private ViewPager vp; private int []imageIdArray;//圖片資源的陣列 private List<View> viewList;//圖片資源的集合 private ViewGroup vg;//放置圓點 //例項化原點View private ImageView iv_point; private ImageView []ivPointArray; //最後一頁的按鈕 private ImageButton ib_start; private LinearLayout.LayoutParams layoutParams; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); supportRequestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_guide); ib_start = (ImageButton) findViewById(R.id.guide_ib_start); ib_start.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startActivity(new Intent(GuideActivity.this,MainActivity.class)); finish(); } }); //載入ViewPager initViewPager(); //載入底部圓點 initPoint(); } /** * 載入底部圓點 */ private void initPoint() { //這裡例項化LinearLayout vg = (ViewGroup) findViewById(R.id.guide_ll_point); //根據ViewPager的item數量例項化陣列 ivPointArray = new ImageView[viewList.size()]; //迴圈新建底部圓點ImageView，將生成的ImageView儲存到陣列中 int size = viewList.size(); for (int i = 0;i<size;i++){ iv_point = new ImageView(this); layoutParams = new LinearLayout.LayoutParams(15,15); //第一個頁面需要設定為選中狀態，這裡採用兩張不同的圖片 if (i == 0){ iv_point.setBackgroundResource(R.drawable.shape_bg_point_enable); }else{ layoutParams.leftMargin=20; iv_point.setBackgroundResource(R.drawable.shape_bg_point_disable); } iv_point.setLayoutParams(layoutParams); iv_point.setPadding(30,0,30,0);//left,top,right,bottom ivPointArray[i] = iv_point; //將陣列中的ImageView加入到ViewGroup vg.addView(ivPointArray[i]); } } /** * 載入圖片ViewPager */ private void initViewPager() { vp = (ViewPager) findViewById(R.id.guide_vp); //例項化圖片資源 imageIdArray = new int[]{R.drawable.guide1,R.drawable.guide2,R.drawable.guide3}; viewList = new ArrayList<>(); //獲取一個Layout引數，設定為全屏 LinearLayout.LayoutParams params = new LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.MATCH_PARENT); //迴圈建立View並加入到集合中 int len = imageIdArray.length; for (int i = 0;i<len;i++){ //new ImageView並設定全屏和圖片資源 ImageView imageView = new ImageView(this); imageView.setLayoutParams(params); imageView.setBackgroundResource(imageIdArray[i]); //將ImageView加入到集合中 viewList.add(imageView); } //View集合初始化好後，設定Adapter vp.setAdapter(new GuidePageAdapter(viewList)); //設定滑動監聽 vp.setOnPageChangeListener(this); } @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } /** * 滑動後的監聽 * @param position */ @Override public void onPageSelected(int position) { //迴圈設定當前頁的標記圖 int length = imageIdArray.length; for (int i = 0;i<length;i++){ ivPointArray[position].setBackgroundResource(R.drawable.shape_bg_point_enable); if (position != i){ ivPointArray[i].setBackgroundResource(R.drawable.shape_bg_point_disable); } } //判斷是否是最後一頁，若是則顯示按鈕 if (position == imageIdArray.length - 1){ ib_start.setVisibility(View.VISIBLE); }else { ib_start.setVisibility(View.GONE); } } @Override public void onPageScrollStateChanged(int state) { } }
這就是所有程式碼了，資源圖片檔案可以去下載原始碼得到：