Gallery、ImageSwitcher

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转载请注明出处：http://blog.csdn.net/mr_leixiansheng/article/details/64123557

使用方式类似于ListView

步骤：

1、设置好数据源

2、设置适配器

3、添加适配器

4、实现监听

代码如下：

1、界面设置

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

2、设置适配器

package com.example.leixiansheng.mygallery;import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageView;/** * Created by Leixiansheng on 2017/3/20. */public class Myadpter extends BaseAdapter {    private int[] pics;    private Context context;    public Myadpter(int[] pics, Context context) {        this.pics = pics;        this.context = context;    }    @Override    public int getCount() {//        return pics.length;        return Integer.MAX_VALUE;    }    @Override    public Object getItem(int i) {        return pics[i];    }    @Override    public long getItemId(int i) {        return i;    }    @Override    public View getView(int i, View view, ViewGroup viewGroup) {        ImageView imageView = new ImageView(context);        //不循环显示//        imageView.setBackgroundResource(pics[i]);        //循环显示        imageView.setBackgroundResource(pics[i% pics.length]);        //设置图片大小        imageView.setLayoutParams(new Gallery.LayoutParams(400, 300));        //设置拉伸模式        imageView.setScaleType(ImageView.ScaleType.FIT_XY);        return imageView;    }}

3、主程序实现功能

package com.example.leixiansheng.mygallery;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;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 AppCompatActivity implements AdapterView.OnItemSelectedListener,ViewSwitcher.ViewFactory{    private int[] pics = {R.drawable.pic1,R.drawable.pic2,R.drawable.pic3,R.drawable.pic4,R.drawable.pic5,R.drawable.pic6,            R.drawable.pic7};    private Gallery gallery;    private Myadpter myadpter;    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.image_switcher);        myadpter = new Myadpter(pics, this);        gallery.setAdapter(myadpter);        gallery.setOnItemSelectedListener(this);        imageSwitcher.setFactory(this);        imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));        imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));    }    //监听    @Override    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {        imageSwitcher.setBackgroundResource(pics[i % pics.length]);    }    @Override    public void onNothingSelected(AdapterView<?> adapterView) {    }    @Override    public View makeView() {        ImageView imageView = new ImageView(this);        imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);        return imageView;    }}

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