android ImageSwitcher

<?xml version="1.0" encoding="UTF-8"?>

<RelativeLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent">

    <ImageSwitcher

        android:id="@+id/switcher"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true" />

    <Gallery

        android:id="@+id/gallery"

        android:layout_width="fill_parent"

        android:layout_height="60dp"

        android:layout_alignParentBottom="true"

        android:layout_alignParentLeft="true"

        android:background="#ff00ff"

        android:gravity="center_vertical"

        android:spacing="16dp" />

</RelativeLayout>

package com.example.yanlei.mytk;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.Button;

import android.widget.Spinner;

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.content.Context;

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.Gallery.LayoutParams;

import android.widget.ImageSwitcher;

import android.widget.ImageView;

import android.widget.ViewSwitcher;

public class MainActivity extends AppCompatActivity implements ViewSwitcher.ViewFactory {

    private ImageSwitcher mSwitcher;

    private Gallery gallery;

    private Context mContext;

    private Integer[] mImageIds = {

            R.drawable.sample_0, R.drawable.sample_1, R.drawable.sample_2,

            R.drawable.sample_3, R.drawable.sample_4, R.drawable.sample_5,

            R.drawable.sample_6, R.drawable.sample_7, R.drawable.sample_8,

            R.drawable.sample_9, R.drawable.sample_10, R.drawable.sample_11};

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        setTitle("浏览图片");

        mSwitcher = (ImageSwitcher) findViewById(R.id.switcher);

        gallery = (Gallery) findViewById(R.id.gallery);

        mSwitcher.setFactory(this);

        mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));

        mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));

        gallery.setAdapter(new ImageAdapter(this));

        gallery.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

            @Override

            public void onItemSelected(AdapterView<?> adapter, View view,

                                       int position, long id) {

                mSwitcher.setImageResource(mImageIds[position]);

            }

            @Override

            public void onNothingSelected(AdapterView<?> arg0) {

            }

        });

    }

    public class ImageAdapter extends BaseAdapter {

        public ImageAdapter(Context context) {

            mContext = context;

        }

        @Override

        public int getCount() {

            return mImageIds.length;

        }

        @Override

        public Object getItem(int position) {

            return position;

        }

        @Override

        public long getItemId(int position) {

            return position;

        }

        @Override

        public View getView(int position, View convertView, ViewGroup parent) {

            ImageView i = new ImageView(mContext);

            i.setImageResource(mImageIds[position]);

            i.setAdjustViewBounds(true);

            i.setLayoutParams(new Gallery.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

            i.setBackgroundResource(R.drawable.picture_frame);

            return i;

        }

    }

    @Override

    public View makeView() {

        ImageView i = new ImageView(this);

        i.setBackgroundColor(0xFF000000);

        i.setScaleType(ImageView.ScaleType.FIT_CENTER);

        i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

        return i;

    }

}