安卓——gallery&&ImageSwitcher制作图片浏览器

爱被打了一巴掌 2022-05-30 11:17 211阅读 0赞

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mainactivity.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        tools:context="com.example.lenovo.glleryimageswitcher.MainActivity">
    
    <Gallery
        android:id="@+id/gallery"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
    
        <ImageSwitcher
            android:id="@+id/is"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
    
    
        </ImageSwitcher>
    
    
    </LinearLayout>

MainActivity.java

package com.example.lenovo.glleryimageswitcher;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.view.View;
    import android.view.animation.Animation;
    import android.view.animation.AnimationUtils;
    import android.widget.AdapterView;
    import android.widget.Gallery;
    import android.widget.ImageSwitcher;
    import android.widget.ImageView;
    import android.widget.ViewSwitcher;
    
    public class MainActivity extends Activity implements AdapterView.OnItemSelectedListener,ViewSwitcher.ViewFactory{
    
        //数据源
        private int[] res=
                {
                R.drawable.item1,
                R.drawable.item2,
                R.drawable.item3,
                R.drawable.item4,
                R.drawable.item5,
                R.drawable.item6,
                R.drawable.item7,
                R.drawable.item8,
                R.drawable.item9,
                R.drawable.item10,
                R.drawable.item11,
                R.drawable.item12,
               };
        private Gallery gallery;
        private ImageAdapter adapter;
        private ImageSwitcher imageSwitcher;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            gallery=(Gallery)findViewById(R.id.gallery);
            imageSwitcher=(ImageSwitcher)findViewById(R.id.is);
            adapter=new ImageAdapter(res,MainActivity.this);
    
    
            gallery.setAdapter(adapter);
    
            gallery.setOnItemSelectedListener(this);
    
            imageSwitcher.setFactory(this);
    
    
        }
    
        @Override
        public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
    
            //     imageView.setBackgroundResource(res[i%res.length]);
            imageSwitcher.setBackgroundResource(res[i%res.length]);
    
        }
    
        @Override
        public void onNothingSelected(AdapterView<?> adapterView) {
    
    
        }
    
        @Override
        public View makeView() {
            ImageView imageView=new ImageView(this);
            imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
            return imageView;
        }
    }

ImageAdapter.java

package com.example.lenovo.glleryimageswitcher;
    
    import android.content.Context;
    import android.util.Log;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.BaseAdapter;
    import android.widget.Gallery;
    import android.widget.ImageView;
    
    /**
     * Created by lenovo on 2018/3/11.
     */
    
    public class ImageAdapter extends BaseAdapter {
    
        private  int res[];
        private Context context;
    
    
    
        public  ImageAdapter(int res[], Context context){
               this.context=context;
                this.res=res;
        }
        @Override
        public int getCount() {
            return Integer.MAX_VALUE;
        }
    
        @Override
        public Object getItem(int i) {
            return res[i];
        }
    
        @Override
        public long getItemId(int i) {
            return i;
        }
    
        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
    
            Log.i("Main","position="+i+"res[i%res.length]="+i%res.length);
            ImageView imageView=new ImageView(context);
            imageView.setBackgroundResource(res[i%res.length]);
            //设置缩略图的大小
            imageView.setLayoutParams(new Gallery.LayoutParams(400,300));
            //设置缩放模式，横向的XY轴进行拉伸
            imageView.setScaleType(ImageView.ScaleType.FIT_XY);
    
            return imageView;
        }
    }

[70]: /images/20220530/16b9b1084d7a40beb5300aa59073790f.png
[70 1]: /images/20220530/de53c65eddf04d39b7f9242d7db0b379.png
[70 2]: /images/20220530/12cf090fa83844d0b237a946915947ed.png
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[70 5]: /images/20220530/40849ee116244a24824176a1a617755c.png
[70 6]: /images/20220530/2de4f8106892443a920a1b12a8d43142.png
[70 7]: /images/20220530/1793da51bae84dfd9e085d902ef3fd9e.png