本文例項為大家分享了Android使用viewpager實現畫廊式效果的具體程式碼，供大家參考，具體內容如下

先看一下效果

1.建立一個自定義類 ZoomOutPageTransformer

public class ZoomOutPageTransformer implements ViewPager.PageTransformer {
 //自由控制縮放比例
 private static final float MAX_SCALE = 1f;
 private static final float MIN_SCALE = 0.8f;//0.85f
 
 @Override
 public void transformPage(View page,float position) {
 
  if (position <= 1) {
 
   float scaleFactor = MIN_SCALE + (1 - Math.abs(position)) * (MAX_SCALE - MIN_SCALE);
 
   page.setScaleX(scaleFactor);
 
   if (position > 0) {
    page.setTranslationX(-scaleFactor * 2);
   } else if (position < 0) {
    page.setTranslationX(scaleFactor * 2);
   }
   page.setScaleY(scaleFactor);
  } else {
 
   page.setScaleX(MIN_SCALE);
   page.setScaleY(MIN_SCALE);
  }
 }
}

2.建立介面卡MyAdapter

public class MyAdapter extends PagerAdapter {
 
 private int[] mData;
 private Context mContext;
 
 public MyAdapter(Context ctx,int[] data) {
  this.mContext = ctx;
  this.mData = data;
 }
 
 @Override
 public int getCount() {
  return mData.length;// 返回資料的個數
 }
 
 @Override
 public Object instantiateItem(final ViewGroup container,final int position) {//子View顯示
  View view = View.inflate(container.getContext(),R.layout.item,null);
  ImageView imageView = view.findViewById(R.id.iv_icon);
  imageView.setImageResource(mData[position]);
 
  imageView.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    Toast.makeText(mContext,"當前條目：" + position,Toast.LENGTH_SHORT).show();
   }
  });
 
  container.addView(view);//新增到父控制元件
  return view;
 }
 
 @Override
 public boolean isViewFromObject(View view,Object object) {
  return view == object;// 過濾和快取的作用
 }
 
 @Override
 public void destroyItem(ViewGroup container,int position,Object object) {
  container.removeView((View) object);//從viewpager中移除掉
 }
}

3.item佈局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="match_parent"
 android:layout_height="match_parent">
 <ImageView
  android:id="@+id/iv_icon"
  android:layout_width="match_parent"
  android:scaleType="centerCrop"
  android:src="@mipmap/ic_launcher"
  android:layout_height="match_parent"/>
</LinearLayout>

4.activity_main佈局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/ll_layout"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:clipChildren="false"
 android:orientation="vertical">
 
 <TextView
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:gravity="center"
  android:padding="5dp"
  android:text="viewpager實現畫廊效果"
  android:textColor="@color/colorPrimary"/>
 
 <androidx.viewpager.widget.ViewPager
  android:id="@+id/viewPager"
  android:layout_width="200dp"
  android:layout_height="300dp"
  android:layout_gravity="center"
  android:layout_marginBottom="30dp"
  android:clipChildren="false"
  android:layout_marginTop="30dp"/>
</LinearLayout>

5.Main_Activity

public class MainActivity extends AppCompatActivity {
 private ViewPager mViewPager;
 private LinearLayout ll_layout;
 
 //嚮導介面的圖片
 private int[] mPics = new int[]{R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher};
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  initView();
 }
 
 private void initView() {
  mViewPager = (ViewPager) findViewById(R.id.viewPager);
  ll_layout = (LinearLayout) findViewById(R.id.ll_layout);
 
  //設定介面卡
  mViewPager.setAdapter(new MyAdapter(this,mPics));
  mViewPager.setPageMargin(20);
  mViewPager.setOffscreenPageLimit(mPics.length);
  mViewPager.setPageTransformer(true,new ZoomOutPageTransformer());//設定畫廊模式
 
  //左右都有圖
  mViewPager.setCurrentItem(1);
 
  //viewPager左右兩邊滑動無效的處理
  ll_layout.setOnTouchListener(new View.OnTouchListener() {
   @Override
   public boolean onTouch(View view,MotionEvent motionEvent) {
    return mViewPager.dispatchTouchEvent(motionEvent);
   }
  });
 }
}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。