Android Gallery与ImageSwitcher使用

例题2-14

图片自己存放在工程中

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
    <!--suppress ALL -->
<TableLayout android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <TableRow>
        <Gallery android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:id="@+id/gallery1"
            android:spacing="10sp"
            android:unselectedAlpha="0.5" />
    </TableRow>
    <TableRow>
        <TextView android:layout_height="150dip"
            android:layout_width="150dip"/>
    </TableRow>
    <TableRow>
        <ImageSwitcher android:id="@+id/imageswitcher1"
            android:layout_width="350dip"
            android:layout_height="450dip">
        </ImageSwitcher>
    </TableRow>
</TableLayout>

Mainactivity.java

package com.example.hello;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher;


public class MainActivity extends AppCompatActivity {
    Gallery gallery;
    ImageSwitcher imageSwitcher;
    private int[] images={
            R.drawable.p2, R.drawable.p3, R.drawable.p4, R.drawable.p5,
            R.drawable.p6, R.drawable.p7, R.drawable.p8, R.drawable.p9,
            R.drawable.p10, R.drawable.p11, R.drawable.p12, R.drawable.p1
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageSwitcher=(ImageSwitcher) findViewById(R.id.imageswitcher1);
        imageSwitcher.setFactory(new viewFactory());
        imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_in));
        imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_out));
        imageSwitcher.setImageResource(R.drawable.p1);
        gallery=(Gallery) findViewById(R.id.gallery1);
        gallery = (Gallery)findViewById(R.id.gallery1);
        gallery.setOnItemClickListener(new onItemSelectedListener());
        gallery.setSpacing(10);
        gallery.setAdapter(new baseAdapter());
    }

    class viewFactory implements ViewSwitcher.ViewFactory{
        @Override
        public View makeView() {
            ImageView imageView=new ImageView(MainActivity.this);
            imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
            return imageView;
        }
    }

    class onItemSelectedListener implements AdapterView.OnItemClickListener {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            imageSwitcher.setImageResource((int)gallery.getItemIdAtPosition(position));
        }


        public void onNothingSelected(AdapterView<?> arg0){ }
    }

    class baseAdapter extends BaseAdapter
    {
        public int getCount(){
            return images.length;
        }
        public Object getItem(int position){
            return null;
        }

        @Override
        public long getItemId(int position) {
            return images[position];
        }

        public View getView(int position, View convertVierw, ViewGroup parent)
        {
            ImageView imageView=new ImageView(MainActivity.this);
            imageView.setImageResource(images[position]);
            imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
            imageView.setLayoutParams(new Gallery.LayoutParams(150,150));
            return imageView;
        }
    }
}